Investments (Other Invested Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Other Invested Assets [Line Items]
Other invested assets	[1]	$ 22,855	$ 21,099
LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		18,796	16,917
Real estate held through direct ownership
Other Invested Assets [Line Items]
Other invested assets		1,794	1,617
Derivative instruments
Other Invested Assets [Line Items]
Other invested assets		1,100	1,457
Other invested assets
Other Invested Assets [Line Items]
Other invested assets		1,165	1,108
Mortgage Debt | Real estate-related
Other Invested Assets [Line Items]
Other invested assets		158	208
Equity method | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		14,671	13,228
Equity method | Private equity | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		8,929	7,215
Equity method | Hedge funds | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		3,164	3,220
Equity method | Real estate-related | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		2,578	2,793
Fair Value
Other Invested Assets [Line Items]
Other invested assets		97	102
Fair Value | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		4,125	3,689
Fair Value | Private equity | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		1,247	1,476
Fair Value | Hedge funds | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		2,078	1,908
Fair Value | Real estate-related | LPs/LLCs
Other Invested Assets [Line Items]
Other invested assets		$ 800	$ 305

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