Accounts receivable, net Accumulated other comprehensive income Additional paid-in capital Amortization of debt issuance costs and discounts Amortization of Financing Costs and Discounts Distributions from unconsolidated affiliates and other Unrealized gain on basis-only swaps Unrealized Gain (Loss) on Derivatives Asset Retirement Obligations [Abstract] Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Asset retirement obligations Asset Retirement Obligations, Noncurrent CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Checks outstanding in excess of cash balances Bank Overdrafts Basic total (in dollars per share) Earnings Per Share, Basic Total Accumulated Depreciation, Depletion and Amortization Capitalized Costs, Accumulated Depreciation, Depletion, Amortization and Valuation Allowance Relating to Oil and Gas Producing Activities Net Property, Plant and Equipment Capitalized Costs, Oil and Gas Producing Activities, Net Total Property, Plant and Equipment Capitalized Costs, Oil and Gas Producing Activities, Gross Cash and cash equivalents Beginning cash and cash equivalents Ending cash and cash equivalents Changes in operating assets and liabilities Increase (Decrease) in Operating Capital Contingencies Commitments and Contingencies Disclosure [Text Block] Common stock Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Equity contribution Proceeds from Contributed Capital Gathering, processing and other Gas Gathering, Transportation, Marketing and Processing Costs Purchased gas and oil expense Refining and Marketing Costs Total Current Liabilities Liabilities, Current Current Liabilities Liabilities, Current [Abstract] Debt Debt Disclosure [Text Block] Long-term debt issuance costs paid Payments of Debt Issuance Costs Deferred income taxes Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Tax Liabilities, Current Deferred income taxes Depreciation, depletion and amortization Fair value of derivative contracts Derivative Instruments and Hedges, Assets Fair value of derivative contracts Derivative Instruments and Hedges, Noncurrent Derivative Contracts Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair value of derivative contracts Diluted total (in dollars per share) Earnings Per Share, Diluted Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Distribution from Questar Payments of Distributions to Affiliates Income from unconsolidated affiliates Income from unconsolidated affiliates Income (Loss) from Equity Method Investments Share-based compensation Share-based Compensation Share-Based Compensation [Abstract] Gas, oil and NGL Energy Related Inventory Abandonment and impairment Exploration expenses Exploration Expense Net gain from asset sales Gain (Loss) on Disposition of Assets Net gain from asset sales Gain (Loss) on Sale of Property Plant Equipment Loss from early extinguishment of debt Loss on early extinguishment of debt Gains (Losses) on Extinguishment of Debt Gathering, processing and other General and administrative CONSOLIDATED STATEMENTS OF INCOME (Unaudited) Diluted from continuing operations (in dollars per share) Basic from continuing operations (in dollars per share) Discontinued operations, net of income tax Discontinued operations, net of income tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Diluted from discontinued operations (in dollars per share) Basic from discontinued operations (in dollars per share) Goodwill Interest expense Interest Expense Interest and other income (loss) Interest Income, Operating Inventories, at lower of average cost or market Inventory, Net [Abstract] Investment in unconsolidated affiliates Lease operating expense TOTAL LIABILITIES AND EQUITY Liabilities and Equity LIABILITIES AND EQUITY Current portion of long-term debt Long-term debt, less current portion Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Net Cash Provided by Operating Activities of Continuing Operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Effect of change in cash and cash equivalents of discontinued operations Net Cash Provided by (Used in) Discontinued Operations FINANCING ACTIVITIES INVESTING ACTIVITIES OPERATING ACTIVITIES Checks outstanding in excess of cash balances NET INCOME ATTRIBUTABLE TO QEP Net Income (Loss) Attributable to Parent Change in cash and cash equivalents Dry exploratory well expense Separation costs Other Nonrecurring Expense Exploration and production Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization Total Revenues Oil and Gas Revenue OPERATING INCOME Operating Income (Loss) REVENUES Revenues [Abstract] Basis Of Presentation Of Interim Consolidated Financial Statements Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Dividends paid Payments of Dividends, Common Stock Employee Benefits Pension and Other Postretirement Benefits Disclosure [Text Block] Other capital contributions Proceeds from Other Equity Long-term debt issued Proceeds from Issuance of Long-term Debt Proceeds from disposition of assets Proceeds from Sale of Oil and Gas Property and Equipment Proved properties Proved Oil and Gas Property, Successful Effort Method Property, plant and equipment, including dry exploratory well expense Payments to Acquire Oil and Gas Equipment Property acquisitions Payments to Acquire Oil and Gas Property Materials and supplies Inventory, Raw Materials and Supplies Long-term debt repaid Repayments of Long-term Debt Repayments of notes payable Repayments of Notes Payable Current portion long-term debt repaid Repayments of Senior Debt Distribution to noncontrolling interest Payments to Noncontrolling Interests Retained earnings Natural gas sales Natural Gas Production Revenue Purchased gas and oil sales Refining and Marketing Revenue NGL sales Natural Gas Midstream Revenue Oil sales Oil and Condensate Revenue Operations By Line Of Business Segment Reporting Disclosure [Text Block] CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) EQUITY Comprehensive Income [Abstract] Total Current Assets Assets, Current Current Assets Assets, Current [Abstract] Unproved properties, not being depleted Unproved Oil and Gas Property, Successful Effort Method Used in diluted calculation (in shares) Used in basic calculation (in shares) Property, Plant and Equipment (successful efforts method for gas and oil properties) TOTAL ASSETS Assets Other long-term liabilities Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] ASSETS Fair Value Measurements Fair Value Disclosures [Text Block] Net Cash Used in Investing Activities of Continuing Operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net Cash Provided by Financing Activities of Continuing Operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Cash provided by operating activities of discontinued operations Cash used in investing activities of discontinued operations Cash used in financing activities of discontinued operations Treasury stock Treasury Stock, Value Change in notes receivable Other noncurrent assets OPERATING EXPENSES Total Operating Expenses Operating Expenses Earnings Per Common Share Attributable to QEP Earnings Per Share [Abstract] INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Total Common Shareholders' Equity Stockholders' Equity Attributable to Parent Income taxes Income Tax Expense (Benefit) Capitalized Exploratory Well Costs [Abstract] Capitalized Exploratory Well Costs [Abstract] Dividends per common share (in dollars per share) Marketing and other Property, Plant and Equipment, Other, Gross Earnings Per Share Earnings Per Share [Text Block] NET INCOME Net income Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Weighted-average common shares outstanding Fair value of derivative contracts Derivative Instruments and Hedges, Liabilities INCOME FROM CONTINUING OPERATIONS Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Less Accumulated Depreciation, Depletion and Amortization Depreciation, depletion and amortization Depreciation, Depletion and Amortization Total Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Commitments and contingencies Commitments and Contingencies Adjustments to reconcile net income to net cash provided by operating activities: Nature Of Business Nature of Operations [Text Block] Accounts payable and accrued expenses Production and property taxes Accrual for Taxes Other than Income Taxes, Current Interest payable Interest Payable, Current Production and property taxes Production Tax Expense Prepaid expenses and other Prepaid Expense and Other Assets, Current CASH USED IN CONTINUING OPERATIONS Net Cash Provided by (Used in) Continuing Operations Long-term debt extinguishment costs Payments of Debt Extinguishment Costs Basis Of Presentation Of Interim Consolidated Financial Statements [Abstract] Contingencies [Abstract] Fair Value Measurements [Abstract] Debt [Abstract] Marketing and other Property, Plant and Equipment, Other, Accumulated Depreciation Employee Benefits [Abstract] Derivative Contracts [Abstract] Discontinued Operations [Abstract] Operations By Line Of Business [Abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Entity [Text Block] Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document Type Midstream Field Services Natural gas gathering systems and treating plants. Midstream field services Accumulated Depreciation Midstream Field Services Accumulated depreciation of natural gas gathering systems and treating plants. Midstream field services Nature Of Business [Abstract] Capitalized Exploratory Well Costs [Text Block] Disclosure of aggregate capitalized costs relating to an enterprise's oil and gas producing activities and the aggregate related accumulated depreciation, depletion, amortization, and valuation allowances. Capitalized Exploratory Well Costs