Policyholder Contract Deposits and Other Policyholder Funds - Unearned revenue liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	$ 1,906	$ 1,865	$ 1,834
Revenue deferred	182	161	153
Amortization	(119)	(120)	(122)
Balance, end of year	1,969	1,906	1,865
Other reconciling items	990	967	997
Other policyholder funds	2,959	2,873	2,862
Life Insurance
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	1,821	1,770	1,727
Revenue deferred	166	161	153
Amortization	(111)	(110)	(110)
Balance, end of year	1,876	1,821	1,770
Institutional Markets
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	1	1	2
Revenue deferred	16	0	0
Amortization	0	0	(1)
Balance, end of year	17	1	1
Corporate & Other
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	84	94	105
Revenue deferred	0	0	0
Amortization	(8)	(10)	(11)
Balance, end of year	$ 76	$ 84	$ 94