Revenues and Accounts Receivable - Disaggregation of Revenue (Details) - Operating Segments - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue
Revenues from contracts with customers	$ 11,549	$ 16,367	$ 23,960	$ 30,348
Crude Oil
Disaggregation of Revenue
Revenues from contracts with customers	11,286	15,841	23,008	28,943
Crude Oil | Sales
Disaggregation of Revenue
Revenues from contracts with customers	10,937	15,576	22,318	28,433
Crude Oil | Transportation
Disaggregation of Revenue
Revenues from contracts with customers	255	175	505	330
Crude Oil | Terminalling, Storage and Other
Disaggregation of Revenue
Revenues from contracts with customers	94	90	185	180
NGL
Disaggregation of Revenue
Revenues from contracts with customers	263	526	952	1,405
NGL | Sales
Disaggregation of Revenue
Revenues from contracts with customers	232	499	885	1,344
NGL | Transportation
Disaggregation of Revenue
Revenues from contracts with customers	8	7	15	16
NGL | Terminalling, Storage and Other
Disaggregation of Revenue
Revenues from contracts with customers	$ 23	$ 20	$ 52	$ 45