Reinsurance - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Ceded Credit Risk [Line Items]
Investments	$ 132,435		$ 132,587
Other investments	8,475		7,812
Deposit assets, net of allowance for credit losses	35,058		34,819
LPINE
Ceded Credit Risk [Line Items]
Deposits assets	10,100		9,600
Investments	13,700		13,700
LPINE | Fixed Annuities
Ceded Credit Risk [Line Items]
Less: reinsurance recoverables	3,600		3,900
Reinsurance recoverables on unpaid losses	36		37
LNBAR
Ceded Credit Risk [Line Items]
Less: reinsurance recoverables	14,400		14,100
Reinsurance recoverables on unpaid losses	3,900		3,900
Reinsurance recoverable for unpaid claims, amortization	46	$ 45
Other investments	1,300		1,500
Trust funded to support reinsurance receivable	13,000		12,800
Fortitude Re | Fixed Annuities
Ceded Credit Risk [Line Items]
Less: reinsurance recoverables	10,500		10,600
Reinsurance recoverables on unpaid losses	2,500		2,500
Reinsurance recoverable for unpaid claims, amortization	24	$ 23
Deposit assets, net of allowance for credit losses	$ 2,300		$ 2,400