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	$ 2,599	$ 1,588	$ 751
Securities pledged under securities lending agreements	125	2	26
Securities pledged under repurchase agreements			(150)
Investments pledged for FHLBI		(450)	(350)
Total increase (decrease) in payables for collateral on investments	$ 2,724	$ 1,140	$ 277