Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Loss Carryforwards [Line Items]
Valuation allowance related to certain tax attribute carryforward	$ 300
Valuation allowance	1,650	$ 1,746
Deferred tax asset, increase (decrease) in valuation allowance recognized	(31)
Unrecognized tax benefits, if recognized would favorably affect the effective tax rate	1,400	1,400	$ 1,200
Unrecognized tax benefits, interest and penalties accrued	53	52	63
Accrued expense (benefit) for the payment of interest and penalties	1	$ (11)	$ (2)
U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio
Operating Loss Carryforwards [Line Items]
Valuation allowance	509
Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio
Operating Loss Carryforwards [Line Items]
Deferred tax asset, increase (decrease) in valuation allowance recognized	$ (41)