Future Contract Benefit (Summary Of Reconciliation Of Future Contract Benefits) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	$ 39,362	$ 38,826
Traditional Life [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	3,538	3,509
Payout Annuities [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	1,943	2,004
UL and Other [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	15,965	14,818
Group Protection [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	5,373	5,462
Other Operations [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	9,277	9,782
Other Operations [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	3,266	3,251
Protective [Member] | Other Operations [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	5,300	5,400
Swiss Re [Member] | Other Operations [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future contract benefits	$ 2,100	$ 2,300