Insurance (Fund Groupings) (Details) - Variable Annuity and Variable Life - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	$ 51,998	$ 52,682
Equity
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	29,346	28,581
Balanced
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	17,393	18,385
Bond
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	5,041	5,567
Money Market
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	$ 218	$ 149