Derivative Financial Instruments - Schedule of Derivative Obligations Under Terminated Hedge Arrangements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Derivative loss, net	$ (501)	$ (141)	$ (2,024)	$ (41)
Interest and other income (loss), net	0	22	0	(42)
Derivative loss, net | Commodity price derivatives
Derivative [Line Items]
Derivative loss, net	(496)	(56)	(1,996)	81
Derivative loss, net | Marketing derivatives
Derivative [Line Items]
Derivative loss, net	(5)	(85)	(28)	(100)
Derivative loss, net | Interest rate derivatives
Derivative [Line Items]
Derivative loss, net	0	0	0	(22)
Interest and other income (loss), net | Contingent consideration
Derivative [Line Items]
Interest and other income (loss), net	$ 0	$ 22	$ 0	$ (42)