Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 4,597	$ 6,147
Oil sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	2,444	3,025
NGL sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	412	569
Gas sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	310	336
Total oil and gas revenues
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	3,166	3,930
Sales of purchased oil
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,429	2,215
Sales of purchased gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	2	2
Total sales of purchased commodities
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,431	$ 2,217