Acquisition (Schedule Of Fair Value Of Net Assets Acquired) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 1,778	$ 1,782
Liberty Transaction [Member]
Business Acquisition [Line Items]
Investments	2,493
Mortgage loans on real estate	658
Cash and invested cash	107
Reinsurance recoverables	76
Premiums and fees receivable	83
Accrued investment income	24
Other intangible assets acquired	640
Other assets acquired	142
Separate account assets	99
Total assets acquired	4,322
Future contract benefits	2,930
Other contract holder funds	46
Other liabilities acquired	140
Separate account liabilities	99
Total liabilities assumed	3,215
Net identifiable assets acquired	1,107
Goodwill	410
Net assets acquired	$ 1,517