Investment Information - Restricted assets (Details) - USD ($) $ in Millions		Dec. 31, 2024		Dec. 31, 2023
Restricted Assets [Line Items]
Restricted assets		$ 13,048		$ 9,932
Collateral or guarantees - affiliated transactions
Restricted Assets [Line Items]
Restricted assets		4,730		4,854
Collateral or guarantees - third party agreements
Restricted Assets [Line Items]
Restricted assets		5,999	[1]	2,869
Deposits with US regulatory authorities
Restricted Assets [Line Items]
Restricted assets		882		833
Deposits with non-US regulatory authorities
Restricted Assets [Line Items]
Restricted assets	[2]	$ 1,437		$ 1,376

[1] 2024 period includes amounts related to the MCE Acquisition.

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