Investments (Schedule Of Increase (Decrease) In Payables For Collateral On Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase (decrease) in payables for collateral on investments
Collateral payable for derivative investments	$ 2,595	$ 1,587	$ 767
Securities pledged under securities lending agreements	126	1	26
Securities pledged under repurchase agreements			(152)
Investments pledged for FHLBI		(450)	(350)
Total increase (decrease) in payables for collateral on investments	$ 2,721	$ 1,138	$ 291