Equity Method Investments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Apr. 01, 2020	Jun. 06, 2019	Jun. 05, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Distributions received from equity method investments			$ 433	$ 541	$ 466
Unamortized basis differences included in equity investments	$ 75		75	84
Amortization expense			9	8	6
Write-off unamortized basis			2
Equity method investments	974		974	1,013
Impairment of fixed assets				0	0
Asset impairments		$ 3
Total revenue			556	481	503
Operating income			232	169	215
Total operating expenses			324	312	288
Mars Oil Pipeline Company LLC (“Mars”) | Shell Pipeline Company L P
Schedule of Equity Method Investments [Line Items]
Equity method investments, ownership interest acquired									20.00%
Consideration to be received if inventory management fees do now meet certain levels									$ 10
June 2019 Acquisition
Schedule of Equity Method Investments [Line Items]
Equity method investments							$ 90
Mattox Pipeline Company LLC (“Mattox”)
Schedule of Equity Method Investments [Line Items]
Equity method investments						$ 174
Purchase And Sale Agreement | Mattox Pipeline Company LLC (“Mattox”)
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership interest acquired						79.00%
Poseidon
Schedule of Equity Method Investments [Line Items]
Investment, excess distribution			39	37	33
Equity method investments	0		0	0
Total revenue				147	132
Operating income				111	97
Total operating expenses				36	35
Explorer
Schedule of Equity Method Investments [Line Items]
Equity method investments	68		68	73
Total revenue				329	258
Operating income				154	143
Total operating expenses				175	115
Explorer | June 2019 Acquisition
Schedule of Equity Method Investments [Line Items]
Equity method investments, ownership interest acquired							25.97%
Total revenue					443
Operating income					247
Total operating expenses					196
Colonial
Schedule of Equity Method Investments [Line Items]
Equity method investments	32		32	29
Impairment of fixed assets	44
Total revenue				1,395	829
Operating income				735	380
Total operating expenses				660	449
Colonial | June 2019 Acquisition
Schedule of Equity Method Investments [Line Items]
Equity method investments, ownership interest acquired							10.125%
Total revenue					1,437
Operating income					702
Total operating expenses					735
Explorer And Colonial
Schedule of Equity Method Investments [Line Items]
Other Investments								$ 60
Amberjack
Schedule of Equity Method Investments [Line Items]
Equity method investments	359		359	382
Asset impairments		$ 4
Total revenue				280	315
Operating income				202	242
Total operating expenses				78	73
Mars Oil Pipeline Company LLC (“Mars”)
Schedule of Equity Method Investments [Line Items]
Equity method investments	150		150	152
Total revenue				259	282
Operating income				162	178
Total operating expenses				97	104
Mars Oil Pipeline Company LLC (“Mars”) | Shell Pipeline Company L P
Schedule of Equity Method Investments [Line Items]
Cash received	9
Permian Basin
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 80		80	83
Total revenue			$ 4
Operating income					$ 25
Total operating expenses				$ 0