Earnings Per Share [Abstract] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Antidilutive shares excluded from computation of EPS Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Used in basic calculation Weighted Average Number of Shares Outstanding, Basic Potential number of shares issuable upon excerise of in-the-money stock options under the Long-term Stock Incentive Plan Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Average diluted common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] QEP Energy [Member] QEP Energy [Member] QEP Energy Company, (QEP Energy) acquires, explores for, develops and produces natural gas, oil, and natural gas liquids (NGL). QEP Marketing and Other [Member] QEP Marketing and Other [Member] QEP Marketing Company (QEP Marketing) markets affiliate and third-party natural gas and oil, provides risk-management services, and owns and operates an underground gas-storage reservoir. Other includes other marketing businesses. Elimination [Member] Intersegment Eliminations [Member] Discontinued Operations [Member] Discontinued Operations [Member] Major Customers [Axis] Customer [Axis] Name of Major Customer [Domain] Customer [Domain] Unaffiliated customers [Member] Unaffiliated customers [Member] Unaffiliated is a party that, indirectly through one or more intermediaries, controls, is controlled by, or is under common control with the entity. Affiliated customers [Member] Affiliated Entity [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenues Oil and Gas Revenue [Abstract] Total Revenues Oil and Gas Revenue Operating expenses Operating Expenses [Abstract] Purchased gas, oil and NGL expense Refining and Marketing Costs Lease operating expense Oil and Gas Property, Lease Operating Expense Natural gas, oil and NGL transportation and other handling costs Shipping, Handling and Transportation Costs Gathering and other expense Gas Gathering, Transportation, Marketing and Processing Costs General and administrative General and Administrative Expense Production and property taxes Production Tax Expense Depreciation, depletion and amortization Results of Operations, Depreciation, Depletion, Amortization and Accretion Other Expenses Other Expenses Operating Expenses Operating Expenses Net gain (loss) from asset sales Gain (Loss) on Disposition of Property Plant Equipment OPERATING INCOME (LOSS) Operating Income (Loss) Realized and unrealized gains (losses) on derivative contracts Gain on Derivative Instruments, Pretax Interest and other income Interest Income, Operating Income from unconsolidated affiliates Income (Loss) from Equity Method Investments Loss from early extinguishment of debt Gains (Losses) on Extinguishment of Debt Interest expense Interest Expense Income (loss) from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax (provision) benefit Income Tax Expense (Benefit) NET INCOME FROM CONTINUING OPERATIONS Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Net income from discontinued operations, net of income tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest NET INCOME ATTRIBUTABLE TO QEP Net Income (Loss) Attributable to Parent Assets Assets Cash capital expenditures Payments to Acquire Productive Assets Accrued capital expenditures Accrued capital expenditures Capital expendiutures, including those expeditures that have been incurred but for which cash has not been paid. Goodwill Goodwill Compensation and Retirement Disclosure [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Pension Plan [Member] Pension Plan [Member] Other Postretirement Benefit Plan [Member] Other Postretirement Benefit Plan [Member] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract] 2015 Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months 2016 Defined Benefit Plan, Expected Future Benefit Payments, Year Two 2017 Defined Benefit Plan, Expected Future Benefit Payments, Year Three 2018 Defined Benefit Plan, Expected Future Benefit Payments, Year Four 2019 Defined Benefit Plan, Expected Future Benefit Payments, Year Five 2020 through 2021 Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter Statement of Financial Position [Abstract] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] EQUITY Stockholders' Equity Attributable to Parent [Abstract] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Treasury stock (in shares) Treasury Stock, Shares Derivative Instruments [Abstract] Derivative Instruments [Abstract] Derivative [Table] Derivative [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Derivative [Line Items] Derivative [Line Items] Unrealized (Loss) Gain on Derivatives Unrealized Gain (Loss) on Derivatives Accumulated Other Comprehensive Income Loss, Cumulative Changes In Gain Loss From Cash Flow Hedges Effect, Before Tax Accumulated Other Comprehensive Income Loss, Cumulative Changes In Gain Loss From Cash Flow Hedges Effect, Before Tax Accumulated change, before tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. Unrealized gains on derivative contracts, net of tax Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Stock options outstanding, beginning of year Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Stock options outstanding, end of year Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted average exercise price, beginning of year Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price, granted in period Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted average exercise price, exercised in period Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average exercise price, forfeited in period Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted average exercise price, end of year Options exercisable, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options exercisable, weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Unvested options, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Unvested options, weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average remaining contractual term, options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual term, options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted average remaining contractual term, options unvested Share Based Compensation Arrangement By Share Based Payment Award Options Unvested Weighted Average Remaining Contractual Term The weighted average period between the balance sheet date and expiration for all unvested portions of options outstanding under the plan, which may be expressed in a decimal value for number of years. Aggregate intrinsic value, options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value, options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Aggregate intrinsic value, options unvested Sharebased Compensation Arrangement By Sharebased Payment Award Options Unvested Intrinsic Value1 The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of unvested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date. Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Curtailment loss Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments Special termination benefits Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period Settlements Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements Amortization of prior service costs Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of actuarial loss Defined Benefit Plan, Amortization of Gains (Losses) Periodic expense Defined Benefit Plan, Net Periodic Benefit Cost Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] Current period actuarial loss (gain) Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax Amortization of actuarial loss Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax Amortization of prior service cost Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax Loss on curtailment in current period Defined Benefit Plan, Curtailments Settlements Total amount recognized in accumulated other comprehensive income Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Fair value of plan assets, beginning of period Defined Benefit Plan, Fair Value of Plan Assets Employer contributions Defined Benefit Plan, Contributions by Employer Unrealized gains (losses) Unrealized Gain (Loss) on Investments Realized gains (losses) Realized Investment Gains (Losses) Administration fees Defined Benefit Plan, Administration Expenses Benefits paid Defined Benefit Plan, Benefits Paid Fair value of plan assets, end of period Debt Disclosure [Abstract] Debt Outstanding Schedule of Debt [Table Text Block] Asset Retirement Obligation [Abstract] Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Summary of Significant Accounting Policies [Abstract] Summary of Significant Accounting Policies [Abstract] Gas Balancing Asset (Liability) Gas Balancing Asset (Liability) Statement of Cash Flows [Abstract] OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Net income attributable to QEP Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Adjustments to reconcile net income to net cash provided by operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation, depletion and amortization Depreciation, Depletion and Amortization Including Discontinued Operations Depreciation, Depletion and Amortization Including Discontinued Operations Deferred income taxes Deferred Income Tax Expense (Benefit) Impairment Asset Impairment Charges Equity-based compensation Share-based Compensation Amortization of debt issuance costs and discounts Amortization of Financing Costs and Discounts Net gain from asset sales Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Income from unconsolidated affiliates Income Loss From Equity Method Investments Including Discontinued Operations Income Loss From Equity Method Investments Including Discontinued Operations Distributions from unconsolidated affiliates and other Proceeds from Equity Method Investment, Dividends or Distributions Non-cash loss on early extinguishment of debt Write off of Deferred Debt Issuance Cost Unrealized loss (gain) on derivative contracts Changes in operating assets and liabilities Increase (Decrease) in Operating Capital Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Prepaid expenses Increase (Decrease) in Prepaid Expense Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Federal income taxes Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Other Increase (Decrease) in Other Current Assets and Liabilities, Net Net Cash Provided by Operating Activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Property acquisitions Payments to Acquire Oil and Gas Property Property, plant and equipment, including dry exploratory well expense Payments to Acquire Oil and Gas Equipment Proceeds from disposition of assets Proceeds from Sale of Oil and Gas Property and Equipment Acquisition deposit held in escrow Acquisition Deposit Held In Escrow acquisition deposit held in escrow Other investments Payments for (Proceeds from) Other Investing Activities Net Cash Provided by (Used in) Investing Activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Checks outstanding in excess of cash balances Increase (Decrease) in Outstanding Checks, Financing Activities Long-term debt issued Proceeds from Issuance of Long-term Debt Long-term debt issuance costs paid Payments of Debt Issuance Costs Long-term debt repaid Repayments of Senior Debt Proceeds from credit facility Proceeds from Lines of Credit Repayments of credit facility Repayments of Lines of Credit Common stock repurchased and retired Payments for Repurchase of Common Stock Treasury stock repurchased Payments for Repurchase of Other Equity Other capital contributions Proceeds from Other Equity Dividends paid Payments of Ordinary Dividends, Common Stock Excess tax benefit on equity-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Net proceeds from the issuance of common units Proceeds from Issuance Initial Public Offering Distribution to noncontrolling interest Payments to Noncontrolling Interests Net Cash (Used in) Provided by Financing Activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Beginning cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Ending cash and cash equivalents Fair Value Disclosures [Abstract] Fair value of financial assets and liabilities Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Fair value and related carrying amount of certain financial instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Accounting Policies [Abstract] Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Cash paid for interest, net of capitalized interest Interest Paid, Net Cash paid for income taxes Income Taxes Paid, Net Non-cash investing activities Noncash Investing and Financing Items [Abstract] Change in capital expenditure accrual balance Capital Expenditures Incurred but Not yet Paid Income Statement [Abstract] Statement [Table] Statement [Table] Operating Activities [Axis] Operating Activities [Axis] Operating Activities [Domain] Operating Activities [Domain] Continuing Operations [Member] Continuing Operations [Member] Statement [Line Items] Statement [Line Items] REVENUES Revenues [Abstract] Gas sales Natural Gas Production Revenue Oil sales Oil and Condensate Revenue NGL sales Natural Gas Midstream Revenue Other revenues Gas Gathering, Transportation, Marketing and Processing Revenue Purchased gas, oil and NGL sales Refining and Marketing Revenue Total Revenues OPERATING EXPENSES Gas, oil and NGL transportation and other handling costs Depreciation, depletion and amortization Depreciation, Depletion and Amortization Exploration expenses Exploration Expense Total Operating Expenses OPERATING INCOME (LOSS) Realized and unrealized gains (losses) on derivative contracts (Note 7) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax (provision) benefit NET INCOME ATTRIBUTABLE TO QEP Earnings (Loss) Per Common Share Attributable to QEP Basic total Earnings Per Share, Basic Diluted total Earnings Per Share, Diluted Weighted-average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Used in diluted calculation Dividends per common share Common Stock, Dividends, Per Share, Declared Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Long term [Member] Long term [Member] Derivative contracts with maturities in excess of one year. Short term [Member] Short term [Member] Derivative contracts with maturities of one year or less. Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Commodity Contract [Member] Commodity Contract [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Level 3 [Member] Netting Adjustments [Member] Netting Adjustments [Member] Netting Adjustments [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Document Period End Date Document Period End Date Financial Assets Derivative Asset [Abstract] Derivative instruments Derivative Asset, Fair Value, Gross Asset Derivative Assets Derivative Asset, Fair Value, Amount Offset Against Collateral Financial liabilities Derivative Liability [Abstract] Derivative instruments Derivative Liability, Fair Value, Gross Liability Derivative Liabilities Derivative Liability, Fair Value, Amount Offset Against Collateral Accounts Receivable Trade [Abstract] Accounts Receivable Trade [Abstract] Bad Debt Expense Provision for Doubtful Accounts Allowance for Doubtful Accounts Receivable Allowance for Doubtful Accounts Receivable Derivative Instruments and Hedging Activities Disclosure [Abstract] Energy [Axis] Energy [Axis] Energy [Domain] Energy [Domain] Natural Gas Sales [Member] Natural Gas Sales [Member] Derivative contracts to lock in a margin on natural gas volumes placed into storage. Purchased Gas and Oil Expense [Member] Purchased Gas and Oil Expense [Member] Derivative contracts recognized in income as purchased gas and oil expense. Crude Oil Sales Costless Collars [Member] Crude Oil Sales Costless Collars [Member] Crude Oil Sales Costless Collars [Member] Oil Basis Swaps [Member] Oil Basis Swaps [Member] Oil Basis Swaps [Member] Oil Sales [Member] Oil Sales [Member] Derivative contracts utilized for oil sales. QEP Marketing [Member] QEP Marketing [Member] Represents derivative contracts for QEP Marketing. Derivative Contract Year [Axis] Derivative Contract Year [Axis] Tabular presentation of derivative instruments by year of contract. Derivative Contract Year [Domain] Derivative Contract Year [Domain] Tabular presentation of derivative instruments by year of contract. Year 2014 [Member] Year 2014 [Member] Year 2014 [Member] Year 2015 [Member] Year 2015 [Member] Year 2015 [Member] Year2016 [Member] Year2016 [Member] Year2016 [Member] Energy Commodities Exchange [Axis] Energy Commodities Exchange [Axis] Exchange where various commodities and derivatives products are traded Energy Commodities Exchange Abbreviation [Domain] Energy Commodities Exchange Abbreviation [Domain] Exchange abbreviation where various commodities and derivatives products are traded. NYMEX WTI less LLS Differential [Member] NYMEX WTI less LLS Differential [Member] NYMEX WTI less LLS Differential [Member] NYMEX [Member] NYMEX [Member] Energy Commodities Exchange Abbreviation IFNPCR [Member] IFNPCR [Member] Energy Commodities Exchange Abbreviation NYMEX WTI [Member] NYMEX WTI [Member] Energy Commodities Exchange Abbreviation BRENT ICE [Member] BRENT ICE [Member] BRENT ICE [Member] Derivative Contract Year Derivative Contract Year The contract year for the derivative contract. Derivative, Underlying Basis Derivative, Underlying Basis Derivative, Nonmonetary Notional Amount Derivative, Nonmonetary Notional Amount Underlying, Derivative Asset Underlying, Derivative Asset Derivative Average Price Floor Derivative Average Price Floor Derivative Average Price Floor Derivative Average Price Ceiling Derivative Average Price Ceiling Derivative Average Price Ceiling Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock [Member] Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested balance at beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Shares granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Shares vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Shares forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unvested balance at end of period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Weighted average grant date fair value, beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average grant date fair value, grants Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted average grant date fair value, end of period Future Development Costs [Abstract] Future Development Costs [Abstract] Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Next Twelve Months Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Next Twelve Months 2013 - Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Next Twelve Months Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Year Two Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Year Two Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Year Two Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Year Three Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Year Three Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs, Year Three Commitments and Contingencies Disclosure [Abstract] Contingencies Commitments and Contingencies Disclosure [Text Block] ASSETS Assets [Abstract] Current Assets Assets, Current [Abstract] Cash and cash equivalents Cash Equivalents, at Carrying Value Accounts receivable, net Accounts Receivable, Net, Current Fair value of derivative contracts Derivative Instruments and Hedges, Assets Gas, oil and NGL inventories, at lower of average cost or market Energy Related Inventory Deferred income taxes - current Deferred Tax Assets, Net, Current Prepaid expenses and other Prepaid Expense and Other Assets, Current Current assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets, Current Total Current Assets Assets, Current Property, Plant and Equipment (successful efforts method for gas and oil properties) Property, Plant and Equipment, Net [Abstract] Proved properties Proved Oil and Gas Property, Successful Effort Method Unproved properties Unproved Oil and Gas Property, Successful Effort Method Marketing and other Property, Plant and Equipment, Other, Gross Materials and supplies Inventory, Drilling, Noncurrent Total Property, Plant and Equipment Property, Plant and Equipment, Gross Less Accumulated Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization, Nonproduction [Abstract] Exploration and production Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization Marketing and other Property, Plant and Equipment, Other, Accumulated Depreciation Total Accumulated Depreciation, Depletion and Amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net Property, Plant and Equipment Property, Plant and Equipment, Net Fair value of derivative contracts Derivative Instruments and Hedges, Noncurrent Other noncurrent assets Other Assets, Noncurrent Noncurrent assets of discontinued operations Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent TOTAL ASSETS Current Liabilities Liabilities, Current [Abstract] Checks outstanding in excess of cash balances Bank Overdrafts Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current Income taxes payable Accrued Income Taxes, Current Production and property taxes Accrual for Taxes Other than Income Taxes, Current Interest payable Interest Payable, Current Fair value of derivative contracts Derivative Instruments and Hedges, Liabilities Deferred income taxes Deferred Tax Liabilities, Net, Current Current liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Current Total Current Liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Asset retirement obligations Asset Retirement Obligations, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Noncurrent liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Commitments and contingencies (Note 10) Commitments and Contingencies Common stock - par value $0.01 per share; 500.0 million shares authorized; 176.2 million and 179.7 million shares issued, respectively Common Stock, Value, Issued Treasury stock - 0.8 million and 0.4 million shares, respectively Treasury Stock, Value Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Total Common Shareholders' Equity Stockholders' Equity Attributable to Parent Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Total Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest TOTAL LIABILITIES AND EQUITY Liabilities and Equity Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Term Loan Tranche [Axis] Term Loan Tranche [Axis] Term Loan Tranche [Axis] Term Loan Tranche [Domain] Term Loan Tranche [Domain] [Domain] for Term Loan Tranche [Axis] First Term Loan Tranche [Member] First Term Loan Tranche [Member] First Term Loan Tranche [Member] Second Term Loan Tranche [Member] Second Term Loan Tranche [Member] Second Term Loan Tranche [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term Loan due 2017 [Member] Term Loan due 2017 [Member] Term Loan due in 2017 Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Forecasted production from proved reserves (in hundredths) Maximum Forecasted Production Covered By Derivatives Potential maximum amount of forecasted production covered by derivative contracts. Total principal amount of debt Line of Credit Facility, Maximum Borrowing Capacity Notional amount of interest rate derivatives Derivative Liability, Notional Amount Fixed Rate Paid (in hundredths) Derivative, Fixed Interest Rate Effective interest Rate Before Impact of Derivatives Effective interest Rate Before Impact of Derivatives Effective interest Rate Before Impact of Derivatives Discontinued Operations and Disposal Groups [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Groups, Including Discontinued Operations, Name [Domain] Disposal Groups, Including Discontinued Operations, Name [Domain] Midstream Business Held For Sale [Member] Midstream Business Held For Sale [Member] Midstream Business Held For Sale [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Payments to Acquire Oil and Gas Property and Equipment Payments to Acquire Oil and Gas Property and Equipment Production and property taxes Total Operating Expenses Loss from early extinguishment of debt Interest expense INCOME FROM DISCONTINUED OPERATIONS BEFORE INCOME TAXES Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Income taxes Discontinued Operation, Tax Effect of Discontinued Operation NET INCOME FROM DISCONTINUED OPERATIONS Net Income From Discontinued Operations Including Portion Attributable To Noncontrolling Interest Net Income From Discontinued Operations Including Portion Attributable To Noncontrolling Interest NET INCOME FROM DISCONTINUED OPERATIONS, NET OF INCOME TAX Income from discontinued operations before income taxes attributable to QEP from QEP Midstream Income (Loss) Attributable to Parent Ownership Percentage Ownership Percentage Ownership Percentage Funded Pension Plan [Member] Funded Pension Plan [Member] Information on funded defined benefit pension plan. Employee Stock Option [Member] Employee Stock Option [Member] Performance Share Units [Member] Performance Share Units [Member] Incremental common shares attributable to performance share units. Defined Benefit Plan Percentage Of Employees Covered Defined Benefit Plan Percentage Of Employees Covered Defined Benefit Plan Percentage Of Employees Covered Shares available for future grants Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Tax benefit from equity-based compensation expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Adjustment to Additional Paid In Capital resulting from income tax effect of equity-based compensation Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Unrecognized compensation costs Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average period for recognition of equity-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Cash received in relation to stock options Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Total fair value of stock that vested during the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Income tax expense (benefit) related to restricted stock compensation Employee Service Share-Based Compensation Tax Expense Employee Service Share-Based Compensation Tax Expense Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Income Tax Disclosure [Abstract] Deferred Tax Assets, Valuation Allowance Deferred Tax Assets, Valuation Allowance Income Statement Impact Of Discontinued Operations [Table Text Block] Income Statement Impact Of Discontinued Operations [Table Text Block] Income Statement Impact Of Discontinued Operations [Table Text Block] Assets And Liabilities Of Discontinued Operations [Table Text Block] Assets And Liabilities Of Discontinued Operations [Table Text Block] Assets And Liabilities Of Discontinued Operations [Table Text Block] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Natural gas derivative contracts [Member] Natural gas derivative contracts [Member] Derivative instrument whose primary underlying risk is tied to commodity prices. NGL derivative contracts [Member] NGL derivative contracts [Member] Derivative instrument whose primary underlying risk is tied to commodity prices. Oil derivative contracts [Member] Oil derivative contracts [Member] Derivative instrument whose primary underlying risk is tied to commodity prices. Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Realized and unrealized gains on commodity derivative instruments [Member] Realized and unrealized gains on commodity derivative instruments [Member] The income statement location of gains and losses on derivative instruments on derivative instruments not designated as hedging instruments, by income statement location. Realized And Unrealized Gains Losses On Interest Rate Swaps [Member] Realized And Unrealized Gains Losses On Interest Rate Swaps [Member] Realized And Unrealized Gains Losses On Interest Rate Swaps [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Realized gain (loss) on commodity derivative contracts not designated as hedging instruments Realized gain (loss) on commodity derivative contracts not designated as hedging instruments Represents the realized gain (loss) on commodity derivative contracts not designated as hedging instruments for the period. Unrealized gain (loss) on commodity derivative contracts not designated as hedging instruments Unrealized gain (loss) on commodity derivative contracts not designated as hedging instruments Represents the unrealized gain (loss) on commodity derivative contracts not designated as hedging instruments for the period. Realized and Unrealized Gain (Loss) on Commodity Derivative Contracts Not Designated as Hedging Instruments Realized and Unrealized Gain (Loss) on Commodity Derivative Contracts Not Designated as Hedging Instruments Total Realized and Unrealized Gain (Loss) on Commodity Derivative Contracts Not Designated as Hedging Instruments Realized gain (loss) derivative contracts not designated as hedging instruments Realized gain (loss) derivative contracts not designated as hedging instruments Realized gain (loss) derivative contracts not designated as hedging instruments Unrealized gain (loss) derivative contracts not designated as hedging instruments Unrealized gain (loss) derivative contracts not designated as hedging instruments Unrealized gain (loss) derivative contracts not designated as hedging instruments Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Reported Value Measurement [Member] Reported Value Measurement [Member] Cash and cash equivalents Long-term Debt, Excluding Current Maturities Long-term debt Long-term Debt, Fair Value Deferred Tax Assets, Tax Credit Carryforwards [Abstract] State net operating loss and tax credit carryforwards Deferred Tax Assets, Operating Loss Carryforwards, State and Local U.S. alternative minimum tax credit Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax Total tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards State net operating loss valuation allowance Operating Loss Carryforwards, Valuation Allowance Operating Loss Carryforwards Minimum Expiration Date Operating Loss Carryforwards Minimum Expiration Date Operating Loss Carryforwards Minimum Expiration Date Operating Loss Carryforwards Maximum Expiration Date Operating Loss Carryforwards Maximum Expiration Date Operating Loss Carryforwards Maximum Expiration Date Fair Value, Inputs, Level 2 [Member] Derivative instruments - assets Derivative instruments - liabilities Goodwill and Intangible Assets [Abstract] Goodwill and Intangible Assets [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Goodwill [Line Items] Goodwill [Line Items] Goodwill, Impairment Loss Goodwill, Impairment Loss Capitalized Costs, Oil and Gas Producing Activities, Net [Abstract] Proved properties Capitalized Costs, Proved Properties Unproved properties, net Capitalized Costs, Unproved Properties Total proved and unproved properties Capitalized Costs, Oil and Gas Producing Activities, Gross Accumulated depreciation, depletion and amortization Capitalized Costs, Accumulated Depreciation, Depletion, Amortization and Valuation Allowance Relating to Oil and Gas Producing Activities Net capitalized costs Capitalized Costs, Oil and Gas Producing Activities, Net Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Abstract] Future cash inflows Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Cash Inflows Future production costs Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Production Costs Future development costs Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Development Costs Future income tax expenses Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Income Tax Expense Future net cash flows Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Net Cash Flows 10% annual discount for estimated timing of net cash flows Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Ten Percent Annual Discount for Estimated Timing of Cash Flows Standardized measure of discounted future net cash flows Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves Share-based Compensation [Abstract] Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Loss Contingency, Settlement Agreement, Consideration Litigation Settlement, Amount Loss Contingency, Range of Possible Loss, Minimum Loss Contingency, Range of Possible Loss, Minimum Loss Contingency, Range of Possible Loss, Maximum Loss Contingency, Range of Possible Loss, Maximum Oil and Gas Exploration and Production Industries Disclosures [Abstract] Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table] Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table] Petroleum Reserves [Axis] Petroleum Reserves [Axis] Type of Reserve [Domain] Type of Reserve [Domain] Natural Gas [Member] Natural Gas [Member] Oil [Member] Oil [Member] Natural Gas Liquids [Member] Natural Gas Liquids [Member] Total Reserves Natural Gas Equivalent [Member] Total Reserves Natural Gas Equivalent [Member] This element represents total natural gas, oil and natural gas liquids reserves, presented as natural gas equivalents. Reserve Quantities [Line Items] Reserve Quantities [Line Items] Reserves, Unit of Measure Reserves, Unit of Measure Proved reserves balance Proved Developed and Undeveloped Reserves, Net Extensions and discoveries Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates Extensions and discoveries Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions Purchase of reserves in place Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place Sale of reserves in place Proved Developed and Undeveloped Reserves, Sales of Minerals in Place Production Proved Developed and Undeveloped Reserves, Production Proved reserves balance Proved developed reserves Proved Developed Reserves (Volume) Proved undeveloped reserves Proved Undeveloped Reserve (Volume) Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Defined Benefit Plans Disclosures [Table Text Block] Pension and Other Postretirement Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Schedule of Assumptions Used [Table Text Block] Schedule of Assumptions Used [Table Text Block] Defined Benefit Plan, Actual Plan Asset Allocations [Abstract] (Deprecated 2012-01-31) Schedule of Allocation of Plan Assets [Table Text Block] Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] Schedule of Expected Benefit Payments [Table Text Block] Schedule of Expected Benefit Payments [Table Text Block] Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Discount rate used in calculating benefit obligation Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Rate of increase in compensation used for calculating benefit obligation Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Discount rate used in calculating net periodic benefit cost Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Expected long-term return on plan assets used in calculating net periodic benefit cost Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets Rate of increase in compensation used in calculating net periodic benefit cost Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Standardized Measure of Future Net Cash Flows Relating to Proved Reserves [Abstract] Standardized Measure of Future Net Cash Flows Relating to Proved Reserves [Abstract] Average Sales Price and Production Costs Per Unit of Production [Table] Average Sales Price and Production Costs Per Unit of Production [Table] Average Sales Price and Production Costs Per Unit of Production [Line Items] Average Sales Price and Production Costs Per Unit of Production [Line Items] 12 month average first-of the month commodity price Average Sales Prices Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Abstract] Accrued capital costs included in development costs Accrued capital costs included in development costs Represents capital costs accrued for the development of proved reserves. Costs Incurred, Asset Retirement Obligation Incurred Costs Incurred, Asset Retirement Obligation Incurred Costs Incurred To Advance The Development Of Proved Undeveloped Reserves Costs Incurred To Advance The Development Of Proved Undeveloped Reserves The costs incurred during the period to advance the development of reserves that were classified as proved undeveloped. Unproved Costs Incurred, Acquisition of Unproved Oil and Gas Properties Proved Costs Incurred, Acquisition of Oil and Gas Properties with Proved Reserves Total property acquisitions Costs Incurred, Acquisition of Oil and Gas Properties Exploration Costs Incurred, Exploration Costs Development Costs Incurred, Development Costs Total costs incurred Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities Fair Value, Option, Quantitative Disclosures [Table] Fair Value, Option, Quantitative Disclosures [Table] Oil and Gas Property or Project [Axis] Project [Axis] Project [Domain] Project [Domain] Proved properties [Member] Proved properties [Member] Represents proved properties and major development projects that are included from the capitalized costs being amortized. Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Impairment of Oil and Gas Properties Impairment of Oil and Gas Properties Long-term Debt, Weighted Average Interest Rate Long-term Debt, Weighted Average Interest Rate Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Revolving Credit Facility due 2016 [Member] Line of Credit [Member] 6.05% Senior Notes due 2016 [Member] Senior Notes Due 2016 [Member] Senior Notes Due 2016. 6.80% Senior Notes due 2018 [Member] Senior Notes Due 2018 [Member] Senior Notes Due 2018. 6.80% Senior Notes due 2020 [Member] Senior Notes Due 2020 [Member] Senior Notes Due 2020. 6.875% Senior Notes due 2021 [Member] Senior Notes Due 2021 [Member] Senior Notes Due 2021. 5.375% Senior Notes due 2022 [Member] Senior Notes Due 2022 [Member] Senior Notes Due 2022. 5.25% Senior Notes Due 2023 [Member] 5.25% Senior Notes Due 2023 [Member] 5.25% Senior Notes Due 2023 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Total principal amount of debt Long-term Debt, Gross Less unamortized discount Debt Instrument, Unamortized Discount Total long-term debt outstanding Long-term Debt Business Combinations [Abstract] Schedule of Purchase Price Allocation [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Business Acquisition, Pro Forma Information [Abstract] Business Acquisition, Pro Forma Information [Table Text Block] Restructuring and Related Activities [Abstract] Retention Bonuses Related To Discontinued Operations Retention Bonuses Related To Discontinued Operations Retention Bonuses Related To Discontinued Operations Estimated restructuring costs Restructuring and Related Cost, Expected Cost Capitalized Exploratory Well Costs [Abstract] Beginning Balance Capitalized Exploratory Well Costs Additions to capitalized exploratory well costs pending the determination of proved reserves Capitalized Exploratory Well Cost, Additions Pending Determination of Proved Reserves Reclassifications to proved properties after the determination of proved reserves Reclassification to Well, Facilities, and Equipment Based on Determination of Proved Reserves Capitalized exploratory well costs charged to expense Capitalized Exploratory Well Cost, Charged to Expense Ending Balance Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Type Document Type Amendment Flag Amendment Flag Entity Public Float Entity Public Float Shares vested and paid out Shares vested and canceled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Canceled In The Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than Options, Canceled in the Period Weighted average grant date fair value, vested and paid out Weighted average grant date fair value, vested and canceled Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than Options, Canceled in the Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than Options, Canceled in the Period, Weighted Average Grant Date Fair Value Fair Value, Inputs, Level 1 [Member] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] Cash and Cash Equivalents [Member] Cash and Cash Equivalents [Member] Domestic Equity Securities [Member] Domestic Equity Securities [Member] This category includes information about ownership interests or the right to acquire ownership interests in corporations and other legal entities which ownership interest is represented by shares of common or preferred stock (which is neither mandatorily redeemable no redeemable at the option of the holder), convertible securities, stock rights, or stock warrants. Foreign Equity Securities [Member] Foreign Equity Securities [Member] This category includes information about ownership interests or the right to acquire ownership interests in corporations and other legal entities which ownership interest is represented by shares of common or preferred stock (which is neither mandatorily redeemable no redeemable at the option of the holder), convertible securities, stock rights, or stock warrants. Debt Securities [Member] Debt Securities [Member] Defined Benefit Plan, Fair Value of Plan Assets Defined Benefit Plan, Actual Plan Asset Allocations Defined Benefit Plan, Actual Plan Asset Allocations Derivative Volumes and Average Prices Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Fair values of Derivatives by Balance Sheet Location Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Effects of Derivative Transactions Derivative Instruments, Gain (Loss) [Table Text Block] Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Treasury Stock [Member] Treasury Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Shares, Issued Shares, Issued Treasury Stock, Shares Total net income including portion attributable to noncontrolling interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Dividends Dividends Equity-based compensation Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Equity-based compensation, shares issued Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Equity-based compensation, treasury shares reissued Stock Issued During Period, Shares, Treasury Stock Reissued Distribution to QEP Education Foundation Stock Issued During Period, Value, Treasury Stock Reissued Distribution of noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Net proceeds from QEP Midstream initial public offering Distribution to QEP Education Foundation, treasury shares reissued Treasury Stock Issued Charitable Contribution Treasury stock issued for charitable contributions Reclassification of previously deferred derivative gains in OCI, net of tax Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Common stock repurchased and retired Stock Repurchased and Retired During Period, Value Common stock repurchased and retired, shares Stock Repurchased and Retired During Period, Shares Change in pension and postretirement liability, net of tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Noncontrolling interest decrease from Midstream Sale Noncontrolling Interest, Decrease from Deconsolidation Balance Treasury Stock, Shares Shares, Issued Cash Flow, Supplemental Disclosures [Text Block] Cash Flow, Supplemental Disclosures [Text Block] Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block] Components of basic and diluted shares used in EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Capitalized Exploratory Well Costs, Roll Forward [Table Text Block] Capitalized Exploratory Well Costs, Roll Forward [Table Text Block] Nature of Operations [Text Block] Nature of Operations [Text Block] Consolidation, Policy [Policy Text Block] Consolidation, Policy [Policy Text Block] Reclassification, Policy [Policy Text Block] Reclassification, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Risks And Uncertainties [Policy Text Block] Risks And Uncertainties [Policy Text Block] Risks And Uncertainties [Policy Text Block] Revenue Recognition, Policy [Policy Text Block] Revenue Recognition, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Receivables, Policy [Policy Text Block] Trade and Other Accounts Receivable, Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Commitments and Contingencies, Policy [Policy Text Block] Commitments and Contingencies, Policy [Policy Text Block] Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Derivatives, Policy [Policy Text Block] Derivatives, Policy [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] TreasuryStock [Policy Text Block] TreasuryStock [Policy Text Block] An entity's accounting policy for shares that have been repurchased. Share Repurchases And Retirements [Policy Text Block] Share Repurchases And Retirements [Policy Text Block] Share Repurchases And Retirements [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Pension and Other Postretirement Plans, Policy [Policy Text Block] Pension and Other Postretirement Plans, Policy [Policy Text Block] Comprehensive Income, Policy [Policy Text Block] Comprehensive Income, Policy [Policy Text Block] Segment Reporting, Policy [Policy Text Block] Segment Reporting, Policy [Policy Text Block] Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Change in Standardized Measure of Future Cash Flows [Abstract] Change in Standardized Measure of Future Cash Flows [Abstract] Beginning Balance Sales of gas, oil and NGL produced during the period, net of production costs Sales and Transfers of Oil and Gas Produced, Net of Production Costs Net change in sales prices and in production (lifting) costs related to future production Net Increase (Decrease) in Sales and Transfer Prices and Production Costs Net change due to extensions, discoveries and improved recovery Extensions, Discoveries, Additions and Improved Recovery, Less Related Costs Net change due to revisions of quantity estimates Revisions of Previous Quantity Estimates Changes due to purchases of reserves in place Increase Due to Purchases of Minerals in Place Changes due to sales of reserves in place Decrease Due to Sales of Minerals in Place Previously estimated development costs incurred during the period Previously Estimated Development Costs Incurred During Period Changes in estimated future development costs Changes in Estimated Future Development Costs Accretion of discount Accretion of Discount Net change in income taxes Changes in Future Income Tax Expense Estimates on Future Cash Flows Related to Proved Oil and Gas Reserves Other Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Other Net change Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Period Increase (Decrease) Ending Balance Components of Deferred Tax Assets and Liabilities [Abstract] Deferred Tax Liabilities, Property, Plant and Equipment Deferred Tax Liabilities, Property, Plant and Equipment Deferred Tax Liabilities, Derivatives Deferred Tax Liabilities, Derivatives Deferred Tax Liabilities, Net Deferred Tax Liabilities, Gross Deferred Tax Assets, Derivative Instruments Deferred Tax Assets, Derivative Instruments Deferred Tax Assets Net Operating Loss And Tax Credit Carryforwards Deferred Tax Assets Net Operating Loss And Tax Credit Carryforwards Deferred Tax Assets Net Operating Loss And Tax Credit Carryforwards Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Bonuses Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Bonuses Deferred Tax Assets, Other Deferred Tax Assets, Other Deferred Tax Assets, Gross Deferred Tax Assets, Gross Deferred Tax Assets, Net of Valuation Allowance, Classification [Abstract] Deferred Tax Assets, Net of Valuation Allowance, Classification [Abstract] Deferred Tax Assets, Net of Valuation Allowance, Current Deferred Tax Assets, Net of Valuation Allowance, Current Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Deferred Tax Liabilities, Net Deferred Tax Liabilities, Net Schedule of Environmental Exit Cost [Table] Schedule of Environmental Exit Cost [Table] Environmental Exit Cost by Property [Axis] Environmental Exit Cost by Property [Axis] Environmental Exit Costs, Name of Property [Domain] Environmental Exit Costs, Name of Property [Domain] Environmental Exit Cost [Line Items] Environmental Exit Cost [Line Items] Accrual for Environmental Loss Contingencies, Payments Accrual for Environmental Loss Contingencies, Payments Long-term Purchase Commitment [Table] Category of Item Purchased [Axis] Category of Item Purchased [Axis] Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-term Purchase Commitment [Line Items] Long-term Purchase Commitment [Line Items] Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months Unrecorded Unconditional Purchase Obligation, Due within Two Years Unrecorded Unconditional Purchase Obligation, Due within Two Years Unrecorded Unconditional Purchase Obligation, Due within Three Years Unrecorded Unconditional Purchase Obligation, Due within Three Years Unrecorded Unconditional Purchase Obligation, Due within Four Years Unrecorded Unconditional Purchase Obligation, Due within Four Years Unrecorded Unconditional Purchase Obligation, Due within Five Years Unrecorded Unconditional Purchase Obligation, Due within Five Years Unrecorded Unconditional Purchase Obligation, Due after Five Years Unrecorded Unconditional Purchase Obligation, Due after Five Years Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Permian Basin Acquisition [Member] Permian Basin Acquisition [Member] Permian Basin Acquisition [Member] Williston Basin Acquisition [Member] Williston Basin Acquisition [Member] Williston Basin Acquisition [Member] Proved Property [Member] Proved Property [Member] Proved Property [Member] Unproved Property [Member] Unproved Property [Member] Unproved Property [Member] Asset Retirement Obligation Costs [Member] Asset Retirement Obligation Costs [Member] Other Liabilities [Member] Other Liabilities [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Aggregate purchase price Payments to Acquire Businesses, Gross Recognized identifiable assets acquired and liabilities assumed, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block] Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block] Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Table Text Block] Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Table Text Block] Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block] Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block] Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block] Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block] Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure Price per Unit [Table Text Block] Oil and Gas Net Production, Average Sales Price and Average Production Costs Disclosure [Table Text Block] Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block] Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block] Principal Sources of Change in Standardized measure of Discounted Future Net Cash Flows [Table Text Block] Principal Sources of Change in Standardized measure of Discounted Future Net Cash Flows [Table Text Block] Tabular disclosure of the sources of changes in the standardized measure of discounted future net cash flows during the period. Share Repurchases And Retirements [Abstract] Share Repurchases And Retirements [Abstract] Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Number of shares of common stock repurchased and retired Treasury Stock, Shares, Retired Weighted average price of common stock repurchased and retired Treasury Stock Acquired, Average Cost Per Share Commission paid per share of common stock repurchased and retired Treasury Stock Acquired Commission Paid Per Share Treasury Stock Acquired Commission Paid Per Share Value of stock repurchased and retired Treasury Stock, Retired, Cost Method, Amount Suspended Well Costs Disclosure [Text Block] Suspended Well Costs Disclosure [Text Block] Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] Operations by Line of Business Segment Reporting Disclosure [Text Block] Oil and Gas Exploration and Production Industries Disclosures [Text Block] Oil and Gas Exploration and Production Industries Disclosures [Text Block] Quarterly Financial Information Disclosure [Abstract] Schedule of Quarterly Financial Information [Table Text Block] Schedule of Quarterly Financial Information [Table Text Block] Summary of operating results by line of business Schedule of Segment Reporting Information, by Segment [Table Text Block] Restructuring Costs [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Cost and Reserve [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] One-time Termination Benefits [Member] One-time Termination Benefits [Member] Employee Relocation [Member] Employee Relocation [Member] Facility Closing [Member] Facility Closing [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring costs incurred to date Restructuring and Related Cost, Cost Incurred to Date Restructuring Charges Restructuring Charges Valuation And Qualifying Accounts Abstract [Abstract] Valuation And Qualifying Accounts Abstract [Abstract] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for Doubtful Accounts [Member] Allowance for Doubtful Accounts [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Deductions Valuation Allowances and Reserves, Deductions Value of business sold Value Of Business Sold Value Of Business Sold Debt refinanced in business sale Debt Refinanced In Business Sale Debt Refinanced In Business Sale Pre-tax gain on sale of discontinued operations Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Continuing Cash Flows To Business Held For Sale Continuing Cash Flows To Business Held For Sale Continuing Cash Flows To Business Held For Sale Employee Benefits Pension and Other Postretirement Benefits Disclosure [Text Block] Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Federal Tax Expense (Benefit) Current Federal Tax Expense (Benefit) Deferred Federal Income Tax Expense (Benefit) Deferred Federal Income Tax Expense (Benefit) State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Current State and Local Tax Expense (Benefit) Current State and Local Tax Expense (Benefit) Deferred State and Local Income Tax Expense (Benefit) Deferred State and Local Income Tax Expense (Benefit) 10% annual discount for estimated timing of net cash flows Future production costs Future income tax expenses Income tax (provision) benefit Revenues Earnings Per Share, Basic Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Net Income (Loss) Business Acquisition, Pro Forma Net Income (Loss) Business Acquisition, Pro Forma Earnings Per Share, Basic Business Acquisition, Pro Forma Earnings Per Share, Basic Business Acquisition, Pro Forma Earnings Per Share, Diluted Business Acquisition, Pro Forma Earnings Per Share, Diluted Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Benefit obligation, beginning of period Defined Benefit Plan, Benefit Obligation Settlements Defined Benefit Plan, Settlements, Benefit Obligation Benefit payments Actuarial loss (gain) Defined Benefit Plan, Actuarial Gain (Loss) Benefit obligation, end of period Actual gain on plan assets Defined Benefit Plan, Actual Return on Plan Assets Company contributions to the plan Settlements Defined Benefit Plan, Settlements, Plan Assets Underfunded status (current and long-term) Defined Benefit Plan, Funded Status of Plan Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract] Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract] Amounts included in accounts payable and accrued expenses Pension and Other Postretirement Defined Benefit Plans, Current Liabilities Amounts included in other long-term liabilities Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Total amount recognized in balance sheets Pension and Other Postretirement Defined Benefit Plans, Liabilities Net actuarial loss recognized in AOCI Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax Prior service cost recognized in AOCI Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, Net of Tax Total amount recognized in AOCI Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Line of Credit [Member] Senior Notes Due 2016 [Member] Senior Notes Due 2018 [Member] Debt Instrument, Maturity Date Debt Instrument, Maturity Date Debt Maturity Period Debt Maturity Period Debt Maturity Period Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Long-term Line of Credit Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Long-term Line of Credit Long-term Line of Credit Senior Notes Senior Notes Debt Instrument, Maturity Date Range, Start Debt Instrument, Maturity Date Range, Start Debt Instrument, Maturity Date Range, End Debt Instrument, Maturity Date Range, End Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Results of Operations, Income before Income Taxes [Abstract] Revenues (1) Results of Operations, Revenue from Oil and Gas Producing Activities Production costs Results of Operations, Production or Lifting Costs Exploration expenses Results of Operations, Exploration Expense Depreciation, depletion and amortization Results of Operations, Depreciation, Depletion and Amortization, and Valuation Provisions Abandonment and impairment Results of Operations, Impairment of Oil and Gas Properties Total expenses Results of Operations, Expense from Oil and Gas Producing Activities Income before income taxes Results of Operations, Income before Income Taxes Income taxes Results of Operations, Income Tax Expense Results of operations from producing activities excluding allocated corporate overhead and interest expenses Results of Operations, Oil and Gas Producing Activities Net Income (Excluding Corporate Overhead and Interest Costs) Statement of Comprehensive Income [Abstract] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] Current year net actuarial gain loss [Member] Current year net actuarial gain loss [Member] Current year net actuarial gain loss [Member] Amortization net actuarial gain loss [Member] [Member] Amortization Net Actuarial Gain Loss [Member] Amortization net actuarial gain loss [Member] Other comprehensive income (loss), tax Other Comprehensive Income (Loss), Tax [Abstract] Tax benefit (expense) on gains (losses) on changes in unrealized fair value of derivatives designated as cash flow hedges Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Pension and other postretirement plans adjustments: Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract] Tax benefit (expense) on net unamortized gain (loss) incurred Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax Tax expense on prior service cost incurred Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Tax Tax expense on net curtailment and settlements cost incurred Other Comprehensive Income Loss Pension And Other Postretirement Benefits Net Curtailment And Settlements Tax Other Comprehensive Income Loss Pension And Other Postretirement Benefits Net Curtailment And Settlements Tax Risks and Uncertainties [Abstract] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Valero Marketing And Supply Company [Member] Valero Marketing And Supply Company [Member] Valero Marketing And Supply Company [Member] Freepoint Commodities [Member] Freepoint Commodities [Member] Freepoint Commodities [Member] Arrow Midstream Holdings LLC [Member] Arrow Midstream Holdings LLC [Member] Arrow Midstream Holdings LLC [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Concentration Risk, Percentage Concentration Risk, Percentage Risk free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Weighted average risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected price volatility range, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected price volatility range, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Weighted average expected price volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected term in years at the date of grant Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Operating Leases of Lessee Disclosure [Table Text Block] Operating Leases of Lessee Disclosure [Table Text Block] Other comprehensive income, (loss), net of tax: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Reclassification of previously deferred derivative (gains) losses Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Current year net actuarial gain (loss) Amortization of net actuarial loss Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax Amortization of net prior service cost Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Net of Tax Net curtailment and settlements cost incurred Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax Total pension and other postretirement plans adjustments Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Comprehensive income (loss) attributable to QEP Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Operating Loss Carryforwards [Table Text Block] Summary of Operating Loss Carryforwards [Table Text Block] Schedule of Significant Acquisitions and Disposals [Table] Schedule of Significant Acquisitions and Disposals [Table] Significant Acquisitions and Disposals by Transaction [Axis] Significant Acquisitions and Disposals by Transaction [Axis] Significant Acquisitions and Disposals, Transaction [Domain] Significant Acquisitions and Disposals, Transaction [Domain] Midcontinent Divestitures [Member] Midcontinent Divestitures [Member] Midcontinent Divestitures [Member] Northern Region Divestitures [Member] Northern Region Divestitures [Member] Northern Region Divestitures [Member] Southern Region Divestitures [Member] Southern Region Divestitures [Member] Southern Region Divestitures [Member] Significant Acquisitions and Disposals [Line Items] Significant Acquisitions and Disposals [Line Items] Proceeds from Sale of Property, Plant, and Equipment Proceeds from Sale of Property, Plant, and Equipment Gain (Loss) on Disposition of Oil and Gas and Timber Property Gain (Loss) on Disposition of Oil and Gas and Timber Property Schedule of Effect of Fourth Quarter Events [Table] Schedule of Effect of Fourth Quarter Events [Table] Effect of Fourth Quarter Events [Line Items] Effect of Fourth Quarter Events [Line Items] Income (loss) from continuing operations Non-recurring income(loss) Non-recurring Income(Loss) Non-recurring income(loss) Asset retirement obligation, current Asset Retirement Obligation, Current Asset retirement obligations, noncurrent ARO Liability [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] ARO liability, Beginning Balance Asset Retirement Obligation Accretion Asset Retirement Obligation, Accretion Expense Liabilities incurred Asset Retirement Obligation, Liabilities Incurred Revisions of Estimates Asset Retirement Obligation, Revision of Estimate ARO Liabilities Transferred ARO Liabilities Transferred ARO Liabilities Transferred Liabilities settled Asset Retirement Obligation, Liabilities Settled ARO liability, Ending Balance Nature Of Business [Abstract] Nature Of Business [Abstract] Derivative Contracts Derivative Instruments and Hedging Activities Disclosure [Text Block] Reconciliation of QEP Energy's restructuring cost Restructuring and Related Costs [Table Text Block] Net acres of producing and undeveloped oil and gas properties Gas and Oil Area, Developed, Net Vertical producing oil and gas wells Vertical Producing Oil And Gas Wells Vertical Producing Oil And Gas Wells Escrow Deposit Escrow Deposit Borrowing from Company's expanded term loan Business Combination, Consideration Transferred, Liabilities Incurred Revenue of acquired properties since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Net income of acquired properties since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Transaction costs Acquisition Transaction Costs Business Acquisition Transaction Costs Debt issuance cost Debt Issuance Cost Cash and Cash Equivalents, at Carrying Value Income Taxes Receivable, Current Income Taxes Receivable, Current Midstream Field Services Property Midstream Field Services Property Natural gas gathering systems and treating plants. Property, Plant and Equipment, Gross Accumulated Depreciation Midstream Field Services Accumulated Depreciation Midstream Field Services Accumulated depreciation of natural gas gathering systems and treating plants. Net Property, Plant and Equipment Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Noncurrent assets of discontinued operations Disposal Group, Including Discontinued Operation, Long Lived Assets, Noncurrent Accounts payable and accrued expenses Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current Acquisitions and divestitures [Text Block] Mergers, Acquisitions and Dispositions Disclosures [Text Block] Unfunded Pension Plan [Member] Unfunded Pension Plan [Member] Information on unfunded defined benefit pension plan. Defined Contribution Plan Name [Axis] Defined Contribution Plan Name [Axis] Defined Contribution Plan Name [Domain] Defined Contribution Plan Name [Domain] Employee Investment Plan [Member] Employee Investment Plan [Member] Employee Investment Plan [Member] Closed Retirement Plan [Member] Closed Retirement Plan [Member] Closed Retirement Plan [Member] Employee Category [Axis] Employee Category [Axis] Employee Category [Axis] Employee Category [Domain] Employee Category [Domain] [Domain] for Employee Category [Axis] Active Employees [Member] Active Employees [Member] Active Employees [Member] Non-active Employees [Member] Non-active Employees [Member] Non-active Employees [Member] Defined Benefit Plan, Number of Employees Covered Defined Benefit Plan, Number of Employees Covered Defined Benefit Plan, Number of Employees Covered Postretirement Health Care Benefits, Number of Eligible Postretirement Health Care Benefits, Number of Eligible Postretirement Health Care Benefits, Number of Eligible Postretirement Health Care Benefits, Number of Employees Covered Postretirement Health Care Benefits, Number of Employees Covered Postretirement Health Care Benefits, Number of Employees Covered Defined Benefit Plan, Curtailments Pension Contributions Pension Contributions Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year Defined Benefit Plan, Accumulated Benefit Obligation Defined Benefit Plan, Accumulated Benefit Obligation Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax Defined Contribution Plan, Employer Matching Contribution, Percent of Match Defined Contribution Plan, Employer Matching Contribution, Percent of Match Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Defined Contribution Plan Employer Discretionary Contribution Percent Defined Contribution Plan Employer Discretionary Contribution Percent Defined Contribution Plan Employer Discretionary Contribution Percent Defined Contribution Plan, Cost Recognized Defined Contribution Plan, Cost Recognized Debt Debt Disclosure [Text Block] Operating lease commitments [Abstract] Operating lease commitments [Abstract] Operating Leases, Rent Expense Operating Leases, Rent Expense Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Effective Income Tax Rate Reconciliation, Percent [Abstract] Federal income taxes statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent State income taxes, net of federal income tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent State rate change Effective Income Tax Reconciliation State Rate Change Effective Income Tax Reconciliation State Rate Change Penalties Effective Income Tax Rate Reconciliation Penalties Effective Income Tax Rate Reconciliation Penalties Return to provision adjustment Effective Income Tax Rate Reconciliation Return To Provision Adjustment Effective Income Tax Rate Reconciliation Return To Provision Adjustment Book impairment of goodwill Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Fair Value Measurements Fair Value Disclosures [Text Block] Schedule of Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Asset retirement obligations roll forward Schedule of Change in Asset Retirement Obligation [Table Text Block] Property, Plant and Equipment [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Building [Member] Building [Member] Leasehold Improvements [Member] Leasehold Improvements [Member] Equipment [Member] Equipment [Member] Furniture and Fixtures [Member] Furniture and Fixtures [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Estimated Useful Life Property, Plant and Equipment, Useful Life Quarterly Financial Information [Text Block] Quarterly Financial Information [Text Block] Restructuring Costs Restructuring and Related Activities Disclosure [Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of calculated fair value of options granted and major assumptions used Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of stock option transactions under the terms of LTSIP Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Restricted Shares and Performance Share Units Activity Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Impairment of long-lived assets [Abstract] Impairment of long-lived assets [Abstract] Schedule of Impaired Long-Lived Assets Held and Used [Table] Schedule of Impaired Long-Lived Assets Held and Used [Table] Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] Southern Region [Member] Southern Region [Member] A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Northern Region [Member] Northern Region [Member] A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Unproved Oil and Gas Property or Major Project [Domain] Unproved properties [Member] Unproved properties [Member] Represents unproved properties and major development projects that are excluded from the capitalized costs being amortized. Impaired Long-Lived Assets Held and Used [Line Items] Impaired Long-Lived Assets Held and Used [Line Items]