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	$ 33,884	$ 22,063	$ 20,681
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	27,133	18,414	16,923
Accident And Health Life Insurance Reserves [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Less adjustments	$ 1,416	$ 1,427	$ 1,516