Liability For Unpaid Claims (Changes In Liability For Unpaid Claims) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Liability For Unpaid Claims [Abstract]
Balance as of beginning-of-year		$ 2,222	$ 2,242	$ 2,307
Reinsurance recoverable		57	69	71
Net balance as of beginning-of-year		2,165	2,173	2,236
Business acquired	[1]	2,842
Incurred related to:
Current year		2,531	1,346	1,395
Interest		120	69	71
All other incurred	[2]	(208)	(76)	(156)
Total incurred		2,443	1,339	1,310
Paid related to:
Current year		(1,197)	(798)	(806)
Prior years		(1,061)	(549)	(567)
Total paid		(2,258)	(1,347)	(1,373)
Net balance as of end-of-year		5,192	2,165	2,173
Reinsurance recoverable		143	57	69
Balance as of end-of-year		$ 5,335	$ 2,222	$ 2,242

[1] Represents Liberty group life and disability reserves, net, as of May 1, 2018, subject to finalization of acquisition date fair values. See Note 3 for additional information.

[2] All other incurred is primarily impacted by the level of claim resolutions in the period compared to that which is expected by the reserve assumption. A negative number implies a favorable result where claim resolutions were more favorable than assumed. Our claim resolution rate assumption used in determining reserves is our expectation of the resolution rate we will experience over the long-term life of the block of claims. It will vary from actual experience in any one period, both favorably and unfavorably