Investment Information - Restricted assets (Details) - USD ($) $ in Millions		Sep. 30, 2023	Dec. 31, 2022
Restricted Assets [Line Items]
Restricted assets		$ 9,459	$ 8,701
Collateral or guarantees - affiliated transactions
Restricted Assets [Line Items]
Restricted assets		4,572	4,254
Collateral or guarantees - third party agreements
Restricted Assets [Line Items]
Restricted assets		2,849	2,633
Deposits with US regulatory authorities
Restricted Assets [Line Items]
Restricted assets		788	776
Other
Restricted Assets [Line Items]
Restricted assets	[1]	$ 1,250	$ 1,038

[1] Primarily includes Funds at Lloyds, deposits with non-U.S. regulatory authorities and other restricted assets