Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes [Line Items]
Deferred tax liability attributable to temporary differences in other comprehensive income (loss)	$ 124
Internal corporate reorganization	1,920	$ 0	$ 0
Income taxes receivable, federal, current	2,000	$ 0
Unrecognized tax benefits that would impact effective tax rate	2,200
Capital Loss Carryforward, Internal Corporate Reorganization
Income Taxes [Line Items]
Tax credit carryforward	9,100
Income taxes receivable	1,900
Internal corporate reorganization	1,900
Foreign Tax Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards	$ 11,800