Separate Accounts (Schedule of Fair Value of Separate Account Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 148,421	$ 143,536
Separate Account, Mutual Funds And Collective Investment Trusts [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	147,765	142,892
Separate Account Exchange-traded Funds [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	214	258
Separate Account, Fixed maturity AFS securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	173	169
Separate Account, Cash and Invested Cash [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	145	98
Separate Account, Other Investments [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	124	119
Reinsurance Agreement [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 43	$ 42