Liability For Unpaid Claims (Schedule Of Reconciliation) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Liability for Future Policy Benefit, by Product Segment [Line Items]
Future contract benefits	$ 34,648	$ 22,887	$ 21,576
Liability for unpaid claims	5,335	2,222	2,242	$ 2,307
Life Insurance And Annuity Reserves And Claims Due [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Less adjustments	27,732	19,066	17,634
Accident And Health Life Insurance Reserves [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Less adjustments	$ 1,581	$ 1,599	$ 1,700