Investments (Other Invested Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Investments [Abstract]
Other invested assets	$ 3,070	$ 2,829
Limited Partner [Member]
Other Investments [Abstract]
Other invested assets	1,996	1,367
Gain (Loss) on Derivatives [Member]
Other Investments [Abstract]
Other invested assets	175	140
Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Other Investments [Abstract]
Other invested assets	52	289
Other [Member]
Other Investments [Abstract]
Other invested assets	89	98
Equity Release Mortgages [Member]
Other Investments [Abstract]
Other invested assets	$ 758	$ 935