Revenues and Accounts Receivable - Segment Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue
Total revenues	$ 13,694	$ 8,383
Crude Oil
Disaggregation of Revenue
Revenue from contracts with customers	13,102	7,946
NGL
Disaggregation of Revenue
Revenue from contracts with customers	879	801
Operating Segments
Disaggregation of Revenue
Revenue from contracts with customers	13,981	8,747
Other items in revenues	(167)	(255)
Total revenues	13,814	8,492
Operating Segments | Crude Oil
Disaggregation of Revenue
Revenue from contracts with customers	13,102	7,946
Other items in revenues	(23)	(93)
Total revenues	13,079	7,853
Operating Segments | NGL
Disaggregation of Revenue
Revenue from contracts with customers	879	801
Other items in revenues	(144)	(162)
Total revenues	735	639
Intersegment revenue elimination
Disaggregation of Revenue
Total revenues	$ (120)	$ (109)