Liability For Unpaid Claims (Changes In Liability For Unpaid Claims) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Liability For Unpaid Claims [Abstract]
Balance as of beginning-of-year	$ 6,280	$ 5,934
Reinsurance recoverable	147	151
Net balance as of beginning-of-year	6,133	5,783
Incurred related to:
Current year	2,014	1,932
Interest	81	81
All other incurred	(149)	(170)
Total incurred	1,946	1,843
Paid related to:
Current year	(794)	(792)
Prior years	(1,052)	(953)
Total paid	(1,846)	(1,745)
Net balance as of end-of-period	6,233	5,881
Reinsurance recoverable	142	148
Balance as of end-of-period	$ 6,375	$ 6,029