Investments (Other Invested Assets - Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Carrying value of Tax Credits	$ 947	$ 1,100
Losses From Tax Credits	$ 195	$ 226	$ 240