Policyholders' Account Balances (Unearned Revenue Reserve) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Individual Life \| Variable Universal Life
Policyholder Account Balance [Line Items]
Balance, beginning of period	$ 3,809	$ 3,389
Unearned revenue	302	297
Amortization expense	(95)	(88)
Foreign currency adjustment	0	0
Balance, end of period	4,016	3,598
U.S. Legacy Products \| Guaranteed Universal Life
Policyholder Account Balance [Line Items]
Balance, beginning of period	2,047	1,856
Unearned revenue	123	135
Amortization expense	(42)	(38)
Foreign currency adjustment	0	0
Balance, end of period	2,128	1,953
International Businesses
Policyholder Account Balance [Line Items]
Balance, beginning of period	666	505
Unearned revenue	80	98
Amortization expense	(18)	(14)
Foreign currency adjustment	(17)	30
Balance, end of period	711	619
Total
Policyholder Account Balance [Line Items]
Balance, beginning of period	6,522	5,750
Unearned revenue	505	530
Amortization expense	(155)	(140)
Foreign currency adjustment	(17)	30
Balance, end of period	6,855	6,170
Other
Policyholder Account Balance [Line Items]
Balance, end of period	100	64
Total unearned revenue reserve balance
Policyholder Account Balance [Line Items]
Balance, end of period	$ 6,955	$ 6,234