Reinsurance - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Ceded Credit Risk [Line Items]
Investments	$ 138,106		$ 138,106		$ 132,587
Other investments	8,636		8,636		7,812
Deposit assets, net of allowance for credit losses	35,424		35,424		34,819
LPINE
Ceded Credit Risk [Line Items]
Deposits assets	10,500		10,500		9,600
Investments	14,400		14,400		13,700
LPINE | Fixed Annuities
Ceded Credit Risk [Line Items]
Less: reinsurance recoverables	3,400		3,400		3,900
Reinsurance recoverables on unpaid losses	34		34		37
LNBAR
Ceded Credit Risk [Line Items]
Less: reinsurance recoverables	14,400		14,400		14,100
Reinsurance recoverables on unpaid losses	3,800		3,800		3,900
Reinsurance recoverable for unpaid claims, amortization	48	$ 45	94	$ 90
Other investments	1,300		1,300		1,500
Trust funded to support reinsurance receivable	13,500		13,500		12,800
Fortitude Re | Fixed Annuities
Ceded Credit Risk [Line Items]
Less: reinsurance recoverables	10,500		10,500		10,600
Reinsurance recoverables on unpaid losses	2,400		2,400		2,500
Reinsurance recoverable for unpaid claims, amortization	23	$ 23	47	$ 46
Deposit assets, net of allowance for credit losses	$ 2,200		$ 2,200		$ 2,400