Investments (Other Invested Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Other Invested Assets [Line Items]
Other invested assets	[1]	$ 21,833	$ 18,125
Held-for-sale
Other Invested Assets [Line Items]
Other invested assets		104
LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		15,966	12,883
Real estate held through direct ownership
Other Invested Assets [Line Items]
Other invested assets		1,789	2,027
Derivative Instruments
Other Invested Assets [Line Items]
Other invested assets		3,280	1,915
Other
Other Invested Assets [Line Items]
Other invested assets		798	1,300
Mortgage Debt | Real estate-related
Other Invested Assets [Line Items]
Other invested assets		274	409
Equity method | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		11,676	8,747
Equity method | Private equity | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		6,509	4,311
Equity method | Hedge funds | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		2,797	2,451
Equity method | Real estate-related | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		2,370	1,985
Fair Value
Other Invested Assets [Line Items]
Other invested assets		81	153
Fair Value | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		4,290	4,136
Fair Value | Private equity | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		1,852	1,786
Fair Value | Hedge funds | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		2,119	2,036
Fair Value | Real estate-related | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		$ 319	$ 314

[1] See Note 4 for details of balances associated with variable interest entities.