Income Taxes - Assessment of Deferred Tax Asset Valuation Allowance (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Valuation Allowance [Line Items]
Valuation allowance related to certain tax attribute carryforward	$ 300	$ 300
Deferred tax asset, increase (decrease) in valuation allowance recognized		(405)
Valuation allowance	3,116	3,116	$ 4,250
Write-Off Of Net Operating Loss Carryforwards
Valuation Allowance [Line Items]
Deferred tax asset, increase (decrease) in valuation allowance recognized		(8)
Corebridge Financial Inc
Valuation Allowance [Line Items]
Deferred tax asset, increase (decrease) in valuation allowance recognized		11
Valuation allowance	162	162
U.S.. Life Insurance Companies
Valuation Allowance [Line Items]
Deferred tax asset, increase (decrease) in valuation allowance recognized	511	397
Non U.S.. Life Insurance Companies
Valuation Allowance [Line Items]
Deferred tax asset, increase (decrease) in valuation allowance recognized	355
Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio
Valuation Allowance [Line Items]
Deferred tax asset, increase (decrease) in valuation allowance recognized		355
Valuation allowance	550	550
U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio
Valuation Allowance [Line Items]
Valuation allowance	1,600	1,600
Foreign And State Jurisdictions
Valuation Allowance [Line Items]
Deferred tax asset, increase (decrease) in valuation allowance recognized	$ (413)	$ (44)