Revenues and Accounts Receivable - Disaggregation of Revenue (Details) - Operating Segments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 48,999	$ 57,473	$ 42,949
Crude Oil
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	47,146	54,929	40,550
Crude Oil | Sales
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	45,621	53,822	39,635
Crude Oil | Transportation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,144	745	484
Crude Oil | Terminalling, Storage and Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	381	362	431
NGL
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,853	2,544	2,399
NGL | Sales
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,729	2,414	2,292
NGL | Transportation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	30	30	25
NGL | Terminalling, Storage and Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 94	$ 100	$ 82