Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Tax Credit Carryforward [Line Items]
Change in tax resulting from tax credits, excluding expirations	$ 133,000,000	$ 73,000,000	$ 58,000,000
Net deferred tax assets (liabilities), net of deferred tax (liabilities) assets	1,213,000,000	1,071,000,000
Alternative minimum tax liability	128,000,000
Deferred tax assets, tax credit carryforwards, alternative minimum tax	128,000,000
Unrecognized tax benefits that would impact effective tax rate	75,000,000	36,000,000	42,000,000
Unrecognized tax benefits, income tax penalties and interest accrued	6,000,000	3,000,000	1,000,000
Unrecognized tax benefits, income tax penalties and interest expense	3,000,000		1,000,000
Unrecognized tax benefits, income tax penalties expense		2,000,000
Decrease in unrecognized tax benefits is reasonably possible	78,000,000
Rehabilitation Tax Credit Benefits
Tax Credit Carryforward [Line Items]
Change in tax resulting from tax credits, excluding expirations	4,000,000	4,000,000	4,000,000
Net deferred tax assets (liabilities), net of deferred tax (liabilities) assets	0	4,000,000	0
Energy Tax Credit Benefits
Tax Credit Carryforward [Line Items]
Change in tax resulting from tax credits, excluding expirations	1,000,000	1,000,000	1,000,000
Net deferred tax assets (liabilities), net of deferred tax (liabilities) assets	0	$ 1,000,000	$ 0
Clean Vehicle Tax Credit Benefit
Tax Credit Carryforward [Line Items]
Change in tax resulting from tax credits, excluding expirations	99,000,000
Net deferred tax assets (liabilities), net of deferred tax (liabilities) assets	$ 99,000,000