Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income/(loss) before tax	$ 712	$ (2,607)	$ 2,238
Net (income)/loss attributable to noncontrolling interests	(540)	1,872	(1,731)
Income taxes attributable to noncontrolling interests	(73)	19	(66)
Income/(loss) before tax after deducting net income and taxes attributable to noncontrolling interest	$ 99	$ (716)	$ 441
Federal statutory income tax rate	21.00%	21.00%	21.00%
Income tax expense/(benefit) at statutory rate	$ 21	$ (150)	$ 93
Deferred tax rate adjustment	17	11	10
State income tax, net of federal benefit	1	(9)	7
Income taxes attributable to noncontrolling interests:
Canadian federal and provincial income tax	71	(19)	63
State income tax	2	0	3
Total income tax expense/(benefit)	$ 112	$ (167)	$ 176