Realized Gain (Loss) (Schedule Of Realized Gain (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Realized gain (loss) related to certain investments
Gain (loss) on equity securities	$ 5	$ (17)	$ (9)	$ (10)
Credit loss benefit (expense) on mortgage loans on real estate	70	(1)	(111)	(2)
Other gain (loss) on investments	2	(4)	(7)	(9)
Associated amortization of DAC, VOBA, DSI and DFEL and changes in other contract holder funds	(8)	(5)	34	(12)
Total realized gain (loss) related to certain financial assets	62	(34)	(160)	(63)
Realized gain (loss) on the mark-to-market on certain instruments	(51)	(104)	(102)	(515)
Indexed annuity and IUL contracts net derivatives results:
Gross gain (loss)	47	(21)	(2)	(97)
Associated amortization of DAC, VOBA, DSI, and DFEL	(20)	(2)	(5)	7
GLB fees ceded to LNBAR and attributed fees:
Gross gain (loss)	(46)	(47)	(157)	(153)
Associated amortization of DAC, VOBA, DSI, and DFEL	(5)	(8)	(22)	(23)
Total realized gain (loss)	(13)	(216)	(448)	(844)
Mortgage Loans On Real Estate [Member]
Realized gain (loss) related to certain investments
Realized gain (loss) on the mark-to-market on certain instruments	3		8
Fixed Maturity AFS Securities [Member]
Realized gain (loss) related to certain investments
AFS securities. Gross gains		7	26	39
AFS securities. Gross losses	(6)	(12)	(72)	(55)
Credit loss benefit (expense)	(1)		(21)
AFS securities. Gross OTTI		(2)		(14)
Equity Securities [Member]
Realized gain (loss) related to certain investments
Gain (loss) on equity securities	$ 5	$ (17)	$ (8)	$ (11)