Realized Gain (Loss) (Schedule Of Realized Gain (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Realized gain (loss) related to certain investments
Realized gain (loss) on equity securities	$ 20	$ 4	$ 31	$ (14)
Other gain (loss) on investments	(1)	(8)	2	(8)
Associated amortization of DAC, VOBA, DSI and DFEL and changes in other contract holder funds	(5)	18	(10)	43
Total realized gain (loss) related to certain financial assets	19	(138)	51	(222)
Realized gain (loss) on the mark-to-market on certain instruments	(131)	(235)	88	(51)
Indexed annuity and IUL contracts net derivatives results:
Gross gain (loss)	8	(1)	40	(50)
Associated amortization of DAC, VOBA, DSI, and DFEL	2		(11)	15
GLB fees ceded to LNBAR and attributed fees:
Gross gain (loss)	(62)	(51)	(113)	(110)
Associated amortization of DAC, VOBA, DSI, and DFEL	(8)	(8)	(16)	(17)
Total realized gain (loss)	(172)	(433)	39	(435)
Mortgage Loans On Real Estate [Member]
Realized gain (loss) related to certain investments
Credit loss benefit (expense) on mortgage loans on real estate	13	(111)	36	(181)
Realized gain (loss) on the mark-to-market on certain instruments	1	(2)		5
Mortgage Loans On Real Estate [Member] | Maximum [Member]
Realized gain (loss) related to certain investments
Realized gain (loss) on the mark-to-market on certain instruments			1
Reinsurance Related Assets [Member]
Realized gain (loss) related to certain investments
Credit loss benefit (expense) on mortgage loans on real estate	(5)		(4)
Fixed Maturity AFS Securities [Member]
Realized gain (loss) related to certain investments
AFS securities. Gross gains	4	20	14	25
AFS securities. Gross losses	(8)	(58)	(17)	(66)
Credit loss benefit (expense)	1	(3)	(1)	(21)
Equity Securities [Member]
Realized gain (loss) related to certain investments
Realized gain (loss) on equity securities	$ 24	$ 4	$ 34	$ (13)