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Acquisitions and Divestitures - Acquisitions (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended | 11 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Feb. 14, 2017 USD ($) a market_interconnect contract mi | Feb. 26, 2020 USD ($) | Feb. 28, 2017 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2017 bbl / d | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Apr. 03, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  | $ 50 |  | $ 1,280 |
Amortization expense for finite-lived intangible assets |  |  |  |  |  | 76 | $ 66 | 54 |
Acquisition-related expenses |  |  |  |  |  |  |  | 6 |
Crude Oil Terminal |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  | $ 44 |  |  |  |  |
Felix Midstream LLC | Subsequent Event |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Cash consideration |  | $ 305 |  |  |  |  |  |  |
Alpha Holding Company, LLC |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Cash consideration | $ 1,215 |  |  |  |  |  |  |  |
Length of gathering and transmission lines (in miles) | mi | 515 |  |  |  |  |  |  |  |
Number of market interconnects | market_interconnect | 5 |  |  |  |  |  |  |  |
Additional volume enhancements to gathering system (bbls per day) | bbl / d |  |  |  |  | 350,000 |  |  |  |
Area of acreage dedication (gross acres) | a | 315,000 |  |  |  |  |  |  |  |
Weighted-average useful life | 20 years |  |  |  |  |  |  |  |
Acquisition-related expenses |  |  |  |  |  |  |  | 6 |
Propane Marine Terminal |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Cash consideration |  |  | $ 41 |  |  |  |  |  |
Advantage Joint Venture |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  |  | 50.00%
Acreage Dedication Contracts | Alpha Holding Company, LLC |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Number of acreage dedication contracts acquired | contract | 5 |  |  |  |  |  |  |  |
Weighted-average useful life | 20 years |  |  |  |  |  |  |  |
Amortization expense for finite-lived intangible assets |  |  |  |  |  | $ 34 | $ 25 | $ 10 |

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