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	$ 101,263	$ 99,466
Balanced
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	62,553	62,800
Equity
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	30,185	28,385
Bond
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	8,510	8,265
Money Market
Fair Value, Separate Account Investment [Line Items]
Fund Groupings	$ 15	$ 16