Separate Account (Schedule of Reconciliation of Separate Account Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Separate Account, Liability [Line Items]
Separate account assets	$ 148,421	$ 143,536
Mutual funds and collective investment trusts [Member]
Separate Account, Liability [Line Items]
Separate account assets	147,765	142,892
Fixed Maturity AFS Securities [Member]
Separate Account, Liability [Line Items]
Separate account assets	173	169
Cash and Invested [Member]
Separate Account, Liability [Line Items]
Separate account assets	145	98
Others [Member]
Separate Account, Liability [Line Items]
Separate account assets	124	119
Exchange Traded Funds [Member]
Separate Account, Liability [Line Items]
Separate account assets	$ 214	$ 258