Derivatives - Schedule of mark-to-market impact and commodity derivative settlements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain (loss) on derivatives, net	$ 19	$ 54	$ 12
Net settlements of derivative instruments	153	356	123
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on derivative instruments, net	18	16	(27)
Realized gain (loss) on derivatives, net	$ (132)	$ (399)	$ 143