Separate Accounts (Schedule of Fair Value of Separate Account Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 145,810	$ 143,536
Separate Account, Mutual Funds And Collective Investment Trusts [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	145,178	142,892
Separate Account Exchange-traded Funds [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	269	258
Separate Account, Fixed maturity AFS securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	161	169
Separate Account, Cash and Invested Cash [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	70	98
Separate Account, Other Investments [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 132	$ 119