Investments (Accrued Investment Income) (Details) - USD ($) $ in Millions		Jun. 30, 2024	Dec. 31, 2023
Net Investment Income [Line Items]
Accrued investment income	[1]	$ 3,434	$ 3,287
Fixed maturities
Net Investment Income [Line Items]
Accrued investment income		2,886	2,727
Equity securities
Net Investment Income [Line Items]
Accrued investment income		5	6
Commercial mortgage and other loans
Net Investment Income [Line Items]
Accrued investment income		223	224
Policy loans
Net Investment Income [Line Items]
Accrued investment income		240	259
Other invested assets
Net Investment Income [Line Items]
Accrued investment income		29	23
Short-term investments and cash equivalents
Net Investment Income [Line Items]
Accrued investment income		$ 51	$ 48

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