Finance Lease, Liability, Payments, Due Year Four Finance Lease, Liability, Payments, Due Year Four Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Payments of Debt Issuance Costs Payments of Debt Issuance Costs Level 3 Fair Value, Inputs, Level 3 [Member] Credit Facility Long-term Line of Credit Series A Preferred Limited Partners [Member] Series A Preferred Limited Partners [Member] Series A Preferred Limited Partners [Member] Lessee, Leases Lessee, Leases [Policy Text Block] Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Schedule Of Earnings From Investment In Unconsolidated Affiliates [Table Text Block] Schedule Of Earnings From Investment In Unconsolidated Affiliates [Table Text Block] Schedule of Earnings from Investment in Unconsolidated Affiliates [Table Text Block] Contract with Customer, Liability, Revenue Recognized Contract with Customer, Liability, Revenue Recognized Maturities of Long-term Debt [Abstract] Maturities of Long-term Debt [Abstract] Contract Liabilities, Policy Contract Liabilities, Policy [Policy Text Block] Contract Liabilities, Policy Asset Class [Axis] Asset Class [Axis] Series C preferred limited partners' interest in net income Net Income (Loss) Allocated to Preferred Series C Limited Partners Net Income (Loss) Allocated to Preferred Series C Limited Partners Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Schedule of Leasing Assets and Liabilities [Table Text Block] Schedule of Leasing Assets and Liabilities [Table Text Block] Schedule of Leasing Assets and Liabilities [Table Text Block] Limited partners (208,329,928 and 143,317,328 common units authorized, issued and outstanding, respectively) Limited Partners' Capital Account Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Current Fiscal Year End Date Current Fiscal Year End Date Summary of Gross and Net Amounts of Derivative Instruments Offsetting Assets [Table Text Block] Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Two-Thousand And Sixteen [Member] Two-Thousand And Sixteen [Member] Two-Thousand And Sixteen [Member] Total operating revenues Revenues Derivative [Line Items] Derivative [Line Items] Finance Lease, Liability, Undiscounted Excess Amount Finance Lease, Liability, Undiscounted Excess Amount Fair Value Inputs Assets And Liabilities Quantitative Information [Table] Fair Value Inputs Assets And Liabilities Quantitative Information [Table] Fair Value Inputs Assets And Liabilities Quantitative Information [Table] Property, plant and equipment, net Property, plant and equipment, net Property, Plant and Equipment, Net Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Variable rate basis spread Debt Instrument, Basis Spread on Variable Rate Cover [Abstract] Document Type Document Type Weighted-average variable interest rate Debt, Weighted Average Interest Rate Payments of debt Repayments of Long-term Debt Natural Gas, NGLs and Condensate [Member] Natural Gas, NGLs and Condensate [Member] Natural Gas, NGLs and Condensate [Member] Construction work in progress Construction in Progress [Member] Share-based Payment Arrangement [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Current liabilities: Liabilities, Current [Abstract] Interest in Unincorporated Joint Ventures or Partnerships, Policy Interest in Unincorporated Joint Ventures or Partnerships, Policy [Policy Text Block] Credit Facility [Axis] Credit Facility [Axis] PartnersCapitalNetChangeInParentAdvancesToPredecessor PartnersCapitalNetChangeInParentAdvancesToPredecessor PartnersCapitalNetChangeInParentAdvancesToPredecessor Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Inventory, Policy Inventory, Policy [Policy Text Block] Unamortized discount Debt Instrument, Unamortized Discount Equity [Abstract] Crude Oil Crude Oil [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Commitments and contingent liabilities (see note 18) Commitments and Contingencies Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Other Other Unconsolidated Affiliates [Member] Other unconsolidated affiliates. Loss from financing activities Loss from financing activities Gain (Loss) on Extinguishment of Debt Debt Instrument [Line Items] Debt Instrument [Line Items] Consolidation Items [Domain] Consolidation Items [Domain] Defined contribution cost Defined Contribution Plan, Cost Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Series A preferred limited partners' interest in net income Net Income (Loss) Allocated to Preferred Series A Limited Partners Net Income (Loss) Allocated to Preferred Series A Limited Partners Asset Retirement Obligation Asset Retirement Obligation [Policy Text Block] Line of Credit Facility, Borrowing Capacity, Description Debt Instrument, Unused Borrowing Capacity, Amount Long-term liabilities Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities Asset Class [Domain] Fair Value by Asset Class [Domain] Asset Class [Domain] Other Commitments [Line Items] Other Commitments [Line Items] Vesting Period (years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Restricted Cash, Current Restricted Cash, Current CDPHE Compliance Advisory [Member] CDPHE Compliance Advisory [Member] CDPHE Compliance Advisory Environmental Costs, Policy Environmental Costs, Policy [Policy Text Block] Unrecognized Compensation Expense at December 31, 2019 (millions) Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Segments [Axis] Segments [Axis] Item Effected [Line Items] Item Effected [Line Items] Distribution Made to Limited Partner, Distribution Date Distribution Made to Limited Partner, Distribution Date Derivative Asset Not Designated As Hedging Instruments [Member] Derivative Asset Not Designated As Hedging Instruments [Member] Derivative asset not designated as hedging instruments. Issuance of 28,552,480 common units and 2,550,644 general partner units to DCP Midstream, LLC and affiliates [Member] Issuance of 28,552,480 common units and 2,550,644 general partner units to DCP Midstream, LLC and affiliates [Member] Issuance of 28,552,480 common units and 2,550,644 general partner units to DCP Midstream, LLC and affiliates [Member] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Operating (loss) income Operating Income (Loss) Fair Value Inputs Assets And Liabilities Quantitative Information [Line Items] Fair Value Inputs Assets And Liabilities Quantitative Information [Line Items] Fair Value Inputs Assets And Liabilities Quantitative Information [Line Items] Finance Lease, Interest Payment on Liability Finance Lease, Interest Payment on Liability Fair Value, Measurement Frequency [Domain] Measurement Frequency [Domain] Adjustments for Recent Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Segments [Domain] Segments [Domain] Partnership Equity And Distribution [Table] Partnership Equity And Distribution [Table] Partnership Equity And Distribution [Table] Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Inventories Inventory Disclosure [Text Block] Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Percent Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Percent Distributions to noncontrolling interest Payments of Ordinary Dividends, Noncontrolling Interest Total comprehensive income attributable to partners Comprehensive Income (Loss), Net of Tax, Attributable to Parent Subsequent Event Type [Axis] Subsequent Event Type [Axis] Net unrealized gains (losses) on derivatives still held included in earnings Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Statement of Stockholders' Equity [Abstract] Interest deferment period Debt Instrument, Interest Deferment Period Debt Instrument, Interest Deferment Period Equity Method Investment Summarized Financial Information, Statement of Operations [Table Text Block] Equity Method Investment Summarized Financial Information, Statement of Operations [Table Text Block] Equity Method Investment Summarized Financial Information, Statement of Operations [Table Text Block] Change in operating assets and liabilities, which (used) provided cash, net of effects of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Revenue from External Customers by Products and Services [Table Text Block] Revenue from External Customers by Products and Services [Table Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Interest expense, net Interest Expense Equity Issuance [Domain] Equity Issuance [Domain] [Domain] for Equity Issuance [Axis] LIBOR Market Index London Interbank Offered Rate (LIBOR) Market Index [Member] London Interbank Offered Rate (LIBOR) Market Index [Member] Use of Estimates, Policy Use of Estimates, Policy [Policy Text Block] Description of Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Offer Value Of Common Stock Unit Remaining Available For Sale Offer Value Of Common Stock Unit Remaining Available For Sale Offer value of common stock unit remaining available for sale. Distributions to preferred limited partners Distribution Made to Limited Partner, Cash Distributions Paid Lower of cost or net realizable value adjustment Non-cash lower of cost or net realizable value adjustment Inventory Write-down Net income per limited partner unit — basic and diluted Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax Local Phone Number Local Phone Number Region [Domain] Region [Domain] Region Dispositions Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Major Customers, Policy Major Customers, Policy [Policy Text Block] Liability Class [Axis] Liability Class [Axis] Position [Domain] Position [Domain] Position [Axis] Position [Axis] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract] Total comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Derivatives, Policy Derivatives, Policy [Policy Text Block] Lessee, Operating Lease, Renewal Term Lessee, Operating Lease, Renewal Term Total current assets Current assets Assets, Current Natural Gas Liquids Natural Gas Liquids [Member] Permian Region [Member] Permian Region [Member] Permian Region Net income Equity Method Investment, Summarized Financial Information, Net Income (Loss) Net income attributable to partners Net Income (Loss) Attributable to Parent Current assets: Assets, Current [Abstract] Net unrealized gains (losses) on derivatives still held included in earnings Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Transportation, Processing and Other [Member] Transportation, Processing and Other [Member] Transportation, Processing and Other [Member] Leases [Abstract] Debt, Policy Debt, Policy [Policy Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Restricted Cash, Noncurrent Restricted Cash, Noncurrent Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Derivatives and Fair Value Derivatives and Fair Value [Text Block] Commitments and Contingencies Disclosure [Abstract] Net Long Position (MMBtu), Year Four Net Long Or Short Positions Expected To Be Realized Year Four Net long or (short) positions expected to be realized year four. Accounts Receivable Securitization Agreement Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement Share-based compensation expense Share-based Payment Arrangement, Expense Other Corporate, Non-Segment [Member] Related Party Transaction [Domain] Related Party Transaction [Domain] Lessee, Operating Lease, Liability, Payments, Due after Year Five Lessee, Operating Lease, Liability, Payments, Due after Year Five Entity Address, City or Town Entity Address, City or Town Document Annual Report Document Annual Report Issued May 2013, interest at 5.850% payable semi-annually, due May 2043 Junior Subordinated Notes Five Point Eight Five Zero Percent Due May Twenty Forty Three [Member] Junior Subordinated Notes Five Point Eight Five Zero Percent Due May Twenty Forty Three [Member] Current debt Long-term Debt, Current Maturities Debt Instrument, Interest Rate, Stated Percentage [Abstract] Debt Instrument, Interest Rate, Stated Percentage [Abstract] Operating lease liabilities Operating Lease, Liability, Noncurrent Collateral cash deposits Restricted Cash and Cash Equivalents, Current Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Financial Instruments Carried at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Net Amount Derivative Liability Subsequent Events Subsequent Events [Text Block] Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Asset, Useful Life Litigation Case [Domain] Litigation Case [Domain] Proceeds from Sales of Business, Affiliate and Productive Assets Proceeds from Sales of Business, Affiliate and Productive Assets Schedule of Debt Schedule of Debt [Table Text Block] Automatic enrollment percentage Defined Contribution Plan. Automatic Enrollment Percentage Defined Contribution Plan. Automatic Enrollment Percentage Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Allowance for Doubtful Accounts Receivable, Current Accounts Receivable, Allowance for Credit Loss, Current Debt Instrument, Covenant, Period [Axis] Debt Instrument, Covenant, Period [Axis] Debt Instrument, Covenant, Period [Axis] 2022 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three Proceeds from Debt, Net of Issuance Costs Proceeds from Debt, Net of Issuance Costs Preferred Units, Outstanding Preferred Units, Outstanding Defined Contribution Plan [Table] Defined Contribution Plan [Table] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Subsequent Events [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Agreements and Transactions with Affiliates Related Party Transactions Disclosure [Text Block] Commodity derivatives Commodity Contract [Member] Accumulated other comprehensive loss Accumulated Other Comprehensive (Loss) Income Accumulated Other Comprehensive Income (Loss), Net of Tax Current debt Long-term Debt and Lease Obligation, Current State gross margin tax rate (as percent) State Gross Margin Tax Rate State gross margin tax rate. Net Long Position (MMBtu), Year Three Net Long Or Short Positions Expected To Be Realized Year Three Net long or (short) positions expected to be realized year three. Operating Lease, Payments Operating Lease, Payments Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Gathering and Processing Gathering and Processing [Member] Gathering and Processing [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] DCP Midstream, LLC DCP Midstream LLC [Member] DCP Midstream, LLC. Limited Partner Ownership Interest Limited Partner Ownership Interest Limited Partner Ownership Interest Details of Impairment of Long-Lived Assets Held and Used by Asset Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block] DCP Midstream GP, LLC DCP Midstream GP, LLC [Member] DCP Midstream GP, LLC [Member] Finance Lease, Liability, Payments, Due Year Five Finance Lease, Liability, Payments, Due Year Five Summary of Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Contract with Customer, Liability Contract with Customer, Liability Share-based Compensation Arrangements by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest [Table Text Block] Share-based Compensation Arrangements by Share-based Payment Award, Performance-Based Units, Vested and Expected to Vest [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Common Units Authorized, in Shares Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Net realized and unrealized (losses) gains included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Property, Plant, and Equipment Property, Plant, and Equipment, Fair Value Disclosure Measurement Input Type [Domain] Measurement Input Type [Domain] Related Party [Domain] Related Party [Domain] Revenue from contract with customer not within the scope of Topic 606 Revenue from contract with customer not within scope of Topic 606 Revenue from contract with customer not within scope of Topic 606 Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Panola Pipeline Company, LLC Panola Pipeline Company, LLC [Member] Panola Pipeline Company, LLC [Member] Assets, Measurement Input Assets, Measurement Input Assets, Measurement Input Derivative Liabilities Not Designated As Hedging Instruments [Member] Derivative Liabilities Not Designated As Hedging Instruments [Member] Derivative liabilities not designated as hedging instruments. Entity Tax Identification Number Entity Tax Identification Number Revenue Recognition, Policy Revenue [Policy Text Block] Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Valuation Technique, Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Affiliates Accounts payable Accounts Payable, Related Parties, Current Trading Symbol Trading Symbol Minimum Low end of estimate Minimum [Member] Amount Paid to Fund Supplemental Environmental Projects Settlement portion to Fund Supplemental Environmental Projects Settlement portion to Fund Supplemental Environmental Projects Administrative Settlement Penalty Litigation Settlement, Expense Finite-Lived Intangible Assets, Amortization Expense, Year Two Finite-Lived Intangible Assets, Amortization Expense, Year Two Property, Plant and Equipment, Other Increase (Decrease) Property, Plant and Equipment, Other Increase (Decrease) Property, Plant and Equipment, Other Increase (Decrease) Recent Accounting Pronouncements, Policy [Abstract] Recent Accounting Pronouncements, Policy [Abstract] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Legal Entity [Axis] Legal Entity [Axis] Issued July 2018 and January 2019, interest at 5.375% payable semi-annually, due July 2025 Senior Notes Five Point Three Seven Five Percent Due July Two Thousand Twenty Five [Member] Senior Notes Five Point Three Seven Five Percent Due July Two Thousand Twenty Five [Member] [Member] Finance Lease, Liability, Noncurrent Finance Lease, Liability, Noncurrent 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] Distributions from unconsolidated affiliates Proceeds from Equity Method Investment, Distribution Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Goodwill Goodwill, Fair Value Disclosure Issued October 2006, interest at 6.450% payable semi-annually, due November 2036 Senior Notes Six Point Four Five Zero Percent Due Twenty Thirty Six [Member] Senior Notes Six Point Four Five Zero Percent Due Twenty Thirty Six [Member] Investments in unconsolidated affiliates Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Inventory Disclosure [Abstract] Income tax expense Income Tax Expense (Benefit) Net unrealized (gains) losses on derivative instruments Non-cash derivative mark-to-market Unrealized Gain (Loss) on Derivatives and Commodity Contracts Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Lessee, Operating Lease, Liability, Payments, Due Year Two Lessee, Operating Lease, Liability, Payments, Due Year Two Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Commodity derivatives - liabilities Gross Amounts of Liabilities Presented in the Balance Sheet Derivative Liability, Fair Value, Gross Liability Revenue from Contract with Customer [Abstract] Other long-term liabilities Other Liabilities, Noncurrent City Area Code City Area Code Issued March 2014, interest at 2.700% payable semi-annually, due April 2019 Senior Notes Two Point Seven Zero Percent Due April Two Thousand Nineteen [Member] Senior Notes Two Point Seven Zero Percent Due April Two Thousand Nineteen [Member] Title of 12(b) Security Title of 12(b) Security Equity Issuance [Axis] Equity Issuance [Axis] Equity Issuance [Axis] NGLs and Condensate [Member] NGLs and Condensate [Member] NGLs and Condensate [Member] Assets Assets, Fair Value Disclosure Energy [Axis] Energy [Axis] Award Date [Axis] Award Date [Axis] Presentation of Results of Adoption Impacts of Topic 842 Presentation of Results of Adoption Impacts of Topic 842 [Table Text Block] Presentation of Results of Adoption Impacts of Topic 842 Forward Curve Range Derivative, Forward Price Total Debt, Carrying Value Long-term Debt, Gross Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] ASSETS Assets [Abstract] Per Unit Distribution (in dollars per share) Distribution Made to Limited Partner, Distributions Paid, Per Unit 2020 Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months Loss on sale of assets, net Loss on sale of assets, net Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Preferred Limited Partnership Distribution; Distribution Date Preferred Limited Partnership Distribution; Distribution Date Preferred Limited Partnership Distribution; Distribution Date Finance lease assets [Member] Finance lease assets [Member] Finance lease assets Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Partnership Equity And Distribution [Line Items] Partnership Equity And Distribution [Line Items] Partnership Equity And Distribution [Line Items] Fair Value Assets and Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Strategic Performance Units (SPUs) Performance Shares [Member] Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Derivative Assets Derivative Financial Instruments, Assets [Member] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Increase (Decrease) in Partners' Capital [Roll Forward] Increase (Decrease) in Partners' Capital [Roll Forward] Accounts Receivable Securitization Facility Accounts Receivable Securitization Facility [Member] Accounts Receivable Securitization Facility [Member] Unrealized gains on derivative instruments Derivative Instruments and Hedges, Current Assets Derivative Instruments and Hedges, Assets Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Equity Method Investment, Other than Temporary Impairment Equity Method Investment, Other than Temporary Impairment Components Of Inventory [Line Items] Components Of Inventory [Line Items] Components Of Inventory [Line Items] Restructuring and Related Activities [Abstract] Intangible assets, net Finite-Lived Intangible Assets, Net Net (Short) Position (Bbls), Year One Net Long Or Short Positions Expected To Be Realized Year One, Volume Net Long Or Short Positions Expected To Be Realized Year One, Volume Components Of Inventory [Table] Components Of Inventory [Table] Components Of Inventory [Table] Finance Lease, Liability, Payments, Due Finance Lease, Liability, Payment, Due ExcessPurchasePriceOverAcquiredAssets ExcessPurchasePriceOverAcquiredAssets ExcessPurchasePriceOverAcquiredAssets Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Range [Axis] Statistical Measurement [Axis] Natural Gas [Member] Natural Gas [Member] Partner Type of Partners' Capital Account, Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] General Partner General Partner [Member] Other Other Energy Equipment [Member] General Partner Ownership Interest General Partner Ownership Interest General Partner Ownership Interest Defined Contribution Plan, Employer Discretionary Contribution, Percentage Defined Contribution Plan, Employer Discretionary Contribution, Percentage Defined Contribution Plan, Employer Discretionary Contribution, Percentage Realized gains Realized Gain Loss On Derivatives Realized gains (losses) on derivatives. Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Debt Debt Disclosure [Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Ownership interest percentage by parent Ownership interest percentage by parent Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Finance Lease, Weighted Average Discount Rate, Percent Finance Lease, Weighted Average Discount Rate, Percent Variable Lease, Cost Variable Lease, Cost Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Proceeds from Issuance of Preferred Limited Partners Units Proceeds from Issuance of Preferred Limited Partners Units Entity Central Index Key Entity Central Index Key Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Entity Emerging Growth Company Entity Emerging Growth Company Gulf Coast Express [Member] Gulf Coast Express [Member] Gulf Coast Express [Member] Long-term debt Long-term Debt, Excluding Current Maturities Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Derivative [Table] Derivative [Table] Income Tax, Policy Income Tax, Policy [Policy Text Block] Proceeds from Issuance of Senior Long-term Debt Proceeds from Issuance of Senior Long-term Debt Partner Capital Components [Domain] Partner Capital Components [Domain] Credit Facility [Domain] Credit Facility [Domain] Phillips 66 Phillips Sixty Six [Member] Phillips Sixty Six [Member] Accrued wages and benefits Employee-related Liabilities, Current Level 2 Fair Value, Inputs, Level 2 [Member] Maximum leverage ratio Debt Instrument, Covenant, Leverage Ratio Debt Instrument, Covenant, Leverage Ratio Recent Accounting Pronouncements and Changes in Accounting Principles [Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Commitment fee percentage Line of Credit Facility, Commitment Fee Percentage DCP Midstream LP Dcp Midstream Lp [Member] Dcp Midstream Lp [Member] Weighted Average Number of Limited Partnership and General Partnership Unit Outstanding, Basic and Diluted Weighted Average Number of Limited Partnership and General Partnership Unit Outstanding, Basic and Diluted Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Measurement Input Type [Axis] Measurement Input Type [Axis] Schedule of Fair Value of Unvested Awards Share-based Payment Arrangement, Nonvested Award, Cost [Table Text Block] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Other long-term assets Other Assets, Noncurrent South Region [Member] South Region [Member] South Region FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Derivative Contract [Domain] Derivative Contract [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Debt Instrument, Covenant, Term [Domain] Debt Instrument, Covenant, Term [Domain] [Domain] for Debt Instrument, Covenant, Term [Axis] Finite-Lived Intangible Assets, Amortization Expense, Year One Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Finite-Lived Intangible Assets, Amortization Expense, Year Four Finite-Lived Intangible Assets, Amortization Expense, Year Four Thereafter Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Award Date [Domain] Award Date [Domain] Issued September 2007, interest at 6.750% payable semi-annually, due September 2037 Senior Notes Six Point Seven Five Percent Due September Twenty Thirty Seven [Member] Senior Notes Six Point Seven Five Percent Due September Twenty Thirty Seven [Member] Accrued interest Interest Payable, Current Contract with Customer, Asset and Liability [Table Text Block] Contract with Customer, Asset and Liability [Table Text Block] Credit Agreement Credit Agreement [Member] Credit agreement. 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Finite-Lived Intangible Assets, Amortization Expense, Year Three Finite-Lived Intangible Assets, Amortization Expense, Year Three OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Foreign Currency Derivatives Foreign Currency Derivatives [Member] Foreign currency derivatives. Investments in Unconsolidated Affiliates Equity Method Investments [Table Text Block] Processing, storage and terminal facilities Processing Plants [Member] Processing plants. Net (Short) Position (Bbls), Year Three Net Long Or Short Positions Expected To Be Realized Year Three, Volume Net Long Or Short Positions Expected To Be Realized Year Three, Volume Total partners’ equity Partners' Capital Segment Reporting [Abstract] Lessee, Operating Lease, Liability, Undiscounted Excess Amount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Depreciation and amortization expense Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction Long- Term Assets Long Term Assets [Member] Long-term assets. Sale of Preferred Limited Partnership Units Sale of Preferred Limited Partnership Units Sale of Preferred Limited Partnership Units Debt Disclosure [Abstract] Purchases and Related Costs Purchases and Related Costs [Policy Text Block] Purchases and Related Costs Restructuring and Related Activities Disclosure [Text Block] Restructuring and Related Activities Disclosure [Text Block] Future Maturities of Long-Term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid Income Statement Location [Domain] Income Statement Location [Domain] Market Approach Valuation Technique Valuation, Market Approach [Member] Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Region [Axis] Region [Axis] Region Sales of natural gas, NGLs and condensate Revenue from Contract with Customer, Including Assessed Tax Statement of Financial Position [Abstract] Income Taxes Paid, Net Income Taxes Paid, Net Equity method ownership investment (as percent) Equity Method Investment, Ownership Percentage Common unitholders, units outstanding (in shares) Limited Partners' Capital Account, Units Outstanding Business Description and Basis of Presentation [Text Block] Business Description and Basis of Presentation [Text Block] Equity Method Investments, Fair Value Disclosure Equity Method Investments, Fair Value Disclosure Investment, Name [Axis] Investment, Name [Axis] Net income allocable to limited partners Net Income (Loss) Allocated to Limited Partners Statement of Cash Flows [Abstract] Quarters After June 30, 2018 Quarters After June 30, 2018 [Member] Quarters After June 30, 2018 [Member] Fair Value Measurements, Nonrecurring Fair Value Measurements, Nonrecurring [Table Text Block] Gathering and transmission systems Gathering And Transmission Systems [Member] Gathering and transmission systems. Noncontrolling Interests Noncontrolling Interest [Member] Senior Notes Senior Notes [Member] Preferred Units, Preferred Partners' Capital Accounts Preferred Units, Preferred Partners' Capital Accounts Restricted Investments, at Fair Value Restricted Investments, at Fair Value Operating Lease, Liability, Current Operating Lease, Liability, Current Decrease in Other Operating Assets and Liabilities, Net Increase (Decrease) in Other Operating Assets and Liabilities, Net Risk Management and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Measurement Date Fair Value, Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Measurement Date Fair Value, Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Measurement Date Fair Value, Expected to Vest Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Issued May 2019, interest at 5.125% payable semiannually, due May 2029 Senior Notes Five Point One Two Five Percent Due May Two Thousand Twenty Nine [Member] Senior Notes Five Point One Two Five Percent Due May Two Thousand Twenty Nine Net Long Position (MMBtu), Year Five Net Long Or Short Positions Expected To Be Realized Year Five Net Long Or Short Positions Expected To Be Realized Year Five Lessee, Operating Lease, Liability, Payments, Year One Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Income Taxes Income Tax Disclosure [Text Block] Current assets Equity Method Investment, Summarized Financial Information, Current Assets Other Accounts Payable, Other, Current GPIDRConversion GPIDRConversion GPIDRConversion Disposal Group Name [Domain] Disposal Group Name [Domain] Schedule of Changes in Derivative Instruments Not Designated as Hedging Instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] 2024 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Arithmetic Average Arithmetic Average [Member] Type of Adoption [Domain] Type of Adoption [Domain] Entity Voluntary Filers Entity Voluntary Filers Issued March 2013, interest at 3.875% payable semi-annually, due March 2023 Senior Notes Three Point Eight Seven Five Percent Due March Two Thousand Twenty Three [Member] Senior Notes Three Point Eight Seven Five Percent Due March Two Thousand Twenty Three Capital expenditures Capital expenditures Payments to Acquire Property, Plant, and Equipment Long- Term Liabilities Long Term Liabilities [Member] Long-term liabilities. Proceeds from debt Proceeds from Issuance of Long-term Debt Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, Payments, Due Year Five Capital spending accrual Construction Payable, Current Distributions to limited partners and general partner Payments of Capital Distribution Current liabilities Equity Method Investment, Summarized Financial Information, Current Liabilities Income and Expenses, Lessee [Abstract] Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Disposal Group Name [Axis] Disposal Group Name [Axis] Share-based Compensation, Option and Incentive Plans Policy Share-based Payment Arrangement [Policy Text Block] Deferred income taxes Deferred Income Tax Liabilities, Net Property, plant, and equipment impairment Impairment of Long-Lived Assets Held-for-use Debt interest rate percentage Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Income Statement Location [Axis] Income Statement Location [Axis] Natural Gas Basis Swaps Natural Gas Basis Swaps [Member] Natural gas basis swaps. Liabilities, fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Eliminations Intersegment Eliminations [Member] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Finance Lease, Liability, Payments, Due Year Three Finance Lease, Liability, Payments, Due Year Three Business Acquisition [Line Items] Business Acquisition [Line Items] Finance lease assets Finance Lease, Right-of-Use Asset Accrual for Environmental Loss Contingencies Accrual for Environmental Loss Contingencies Operating Leases, Future Minimum Payments, Year One Operating Leases, Future Minimum Payments, Remainder of Fiscal Year Defined Contribution Plan, Employer Matching Contribution, Percent of Match Defined Contribution Plan, Employer Matching Contribution, Percent of Match Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Total operating costs and expenses Costs and Expenses Unconsolidated Affiliates Majority-Owned Subsidiary, Unconsolidated [Member] Asset Impairment Asset Impairments Asset Impairment Charges Total Debt, Fair Value Debt Instrument, Fair Value Disclosure Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Inventories Total inventories Inventory, Net Measurement Frequency [Axis] Measurement Frequency [Axis] Net Income or Loss per Limited Partner Unit Earnings Per Share [Text Block] Noncontrolling interests Partners' Capital Attributable to Noncontrolling Interest Finance Lease, Right-of-Use Asset, Amortization Finance Lease, Right-of-Use Asset, Amortization Equity Award [Domain] Award Type [Domain] Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Finance Lease, Liability Finance Lease, Liability Discovery Producer Services LLC Discovery [Member] Discovery. Mont Belvieu Enterprise Fractionator Mont Belvieu Enterprise Fractionator [Member] Mont belvieu enterprise fractionator. Net (Short) Position (Bbls), Year Four Net Long Or Short Positions Expected To Be Realized Year Four, Volume Net Long Or Short Positions Expected To Be Realized Year Four, Volume Hedging Designation [Axis] Hedging Designation [Axis] Front Range Pipeline LLC Front Range [Member] Front Range [Member] Ownership [Domain] Ownership [Domain] Interest Capitalization, Policy Interest Capitalization, Policy [Policy Text Block] Investments [Domain] Investments [Domain] Total liabilities Liabilities Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Expected to Vest Other Commitments [Axis] Other Commitments [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Net (Short) Position (Bbls), Year Two Net Long Or Short Positions Expected To Be Realized Year Two, Volume Net Long Or Short Positions Expected To Be Realized Year Two, Volume Sand Hills DCP Sand Hills Pipeline, LLC Sand Hills Pipeline [Member] Sand Hills Pipeline [Member] Statement of Comprehensive Income [Abstract] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] New Mexico Environment Department Notice of Violation 1 [Member] New Mexico Environment Department Notice of Violation 1 [Member] New Mexico Environment Department Notice of Violation 1 [Member] Partnership Equity and Distributions Partners' Capital Notes Disclosure [Text Block] Schedule of Designated and Non-Designated Derivative Instruments in Statement of Financial Position, Fair Value Schedule Of Designated And Non Designated Derivative Instruments In Statement Of Financial Position Fair Value [Table Text Block] Schedule of designated and non-designated derivative instruments in statement of financial position, fair value. Offsetting Assets [Table] Offsetting Assets [Table] Impairment or Disposal of Long-Lived Assets, Policy Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Amortization of Intangible Assets Amortization of Intangible Assets Supplemental Cash Flow Elements [Abstract] Equity Distribution Agreement [Member] Equity Distribution Agreement [Member] Equity Distribution Agreement [Member] Fair Value Measurement Fair Value Disclosures [Text Block] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Disposal Groups [Table] Disposal Groups, Including Discontinued Operations [Table] Partner Capital Components [Axis] Partner Capital Components [Axis] Series B Preferred Limited Partners [Member] Series B Preferred Limited Partners [Member] Series B Preferred Limited Partners [Member] Investments in Less Than 20% Investment In Less Than Twenty Percentage [Member] Investment In Less Than Twenty Percentage [Member] Distributions Made to Limited Partner [Table] Distributions Made to Limited Partner [Table] Investment Type [Axis] Investment Type [Axis] Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Gross Cash paid for interest, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activities Security Exchange Name Security Exchange Name Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Depreciation expense Depreciation Litigation Case [Axis] Litigation Case [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Equity Component [Domain] Equity Component [Domain] Preferred Limited Partnership Unit; Distribution Amount Declared Preferred Limited Partnership Distribution; Distribution Amount Paid Preferred Limited Partnership Unit; Distribution Amount Declared Preferred Limited Partnership Unit; Distribution Amount Declared Hedging Relationship [Domain] Hedging Relationship [Domain] Revenue, Performance Obligation, Description of Timing Revenue, Performance Obligation, Description of Timing Document Transition Report Document Transition Report Issued March 2010, interest at 5.350% payable semiannually, due March 2020 Senior Notes Five Point Three Five Zero Percent Due March Twenty Twenty [Member] Senior Notes Five Point Three Five Zero Percent Due March Twenty Twenty [Member] Cash Flow Hedging [Member] Cash Flow Hedging [Member] Collateral, cash deposits Derivative, Collateral, Right to Reclaim Cash Leases - Other Information Leases - Other Information [Table Text Block] Leases - Other Information [Table Text Block] Affiliates Accounts receivable Accounts Receivable, Related Parties, Current Other Significant Noncash Transactions [Table] Other Significant Noncash Transactions [Table] New Mexico Environment Department Notice of Violation 2 [Member] New Mexico Environment Department Notice of Violation 2 [Member] New Mexico Environment Department Notice of Violation 2 [Member] Goodwill, Impairment Loss Goodwill, Impairment Loss Consolidated Entities [Domain] Consolidated Entities [Domain] Net realized and unrealized gains (losses) included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Net (Short) Long Position (MMBtu), Year One Net Long Or Short Positions Expected To Be Realized Year One Net long or (short) positions expected to be realized year one. Net assets Equity Method Investment, Summarized Financial Information, Assets Commodity derivatives - assets Gross Amounts of Assets Presented in the Balance Sheet Derivative Asset, Fair Value, Gross Asset Balance Sheet Location [Axis] Balance Sheet Location [Axis]