Reinsurance - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Ceded Credit Risk [Line Items]
Investments	$ 119,879	$ 119,879	$ 117,325
Other investments	5,385	5,385	4,757
Deposit assets, net of allowance for credit losses	28,762	28,762	21,056
LPINE
Ceded Credit Risk [Line Items]
Deposits assets	6,800	6,800
Investments	11,000	11,000
LPINE | Fixed Annuities
Ceded Credit Risk [Line Items]
Reinsurance recoverables	4,200	4,200
Reinsurance recoverables on unpaid losses	144	144
LNBAR
Ceded Credit Risk [Line Items]
Reinsurance recoverables	14,400	14,400	13,200
Reinsurance recoverables on unpaid losses	4,200	4,200	4,200
Reinsurance recoverable for unpaid claims, amortization	40	83
Other investments	871	871	1,100
Trust funded to support reinsurance receivable	13,300	13,300	13,000
Fortitude Re | Fixed Annuities
Ceded Credit Risk [Line Items]
Reinsurance recoverables	10,500	10,500	10,500
Reinsurance recoverables on unpaid losses	2,600	2,600	2,700
Reinsurance recoverable for unpaid claims, amortization	22	44
Deposit assets, net of allowance for credit losses	$ 3,600	$ 3,600	$ 4,200