Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in goodwill
Balance at beginning of period	$ 2,540	$ 0	$ 2,540
Acquisitions			2
Goodwill, gross			2,542
Goodwill impairment losses	2,515	0	2,515	$ 0
Foreign currency translation adjustments			(27)
Accumulated impairment losses			(2,542)
Balance at end of period			0	2,540
Operating Segments | Crude Oil
Changes in goodwill
Balance at beginning of period	2,300	0	2,300
Acquisitions			2
Goodwill, gross			2,302
Goodwill impairment losses			2,287
Foreign currency translation adjustments			(15)
Accumulated impairment losses			(2,302)
Balance at end of period			0	2,300
Operating Segments | NGL
Changes in goodwill
Balance at beginning of period	$ 240	$ 0	240
Acquisitions			0
Goodwill, gross			240
Goodwill impairment losses			228
Foreign currency translation adjustments			(12)
Accumulated impairment losses			(240)
Balance at end of period			$ 0	$ 240
Level 3 | Valuation Technique, Discounted Cash Flow
Goodwill
Goodwill impairment analysis, projected cash flows, period	6 years
Level 3 | Valuation Technique, Discounted Cash Flow | Measurement Input, Discount Rate
Goodwill
Goodwill impairment analysis, discount rate, cost of capital, theoretical market participant	14.00%