Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income before tax	$ 1,274	$ 1,614	$ 1,409
Net income attributable to noncontrolling interests	(967)	(1,227)	(995)
Income taxes attributable to noncontrolling interests	(167)	(121)	(189)
Income/(loss) before tax after deducting net income and taxes attributable to noncontrolling interest	$ 140	$ 266	$ 225
Federal statutory income tax rate	21.00%	21.00%	21.00%
Income tax expense at statutory rate	$ 29	$ 56	$ 47
Deferred tax rate adjustment	6	9	7
State income tax, net of federal benefit	2	3	3
Income taxes attributable to noncontrolling interests:
Canadian federal and provincial income tax	113	119	188
Canadian withholding tax	52
State income tax	2	2	1
Total income tax expense	$ 204	$ 189	$ 246