Insurance Liabilities - Unearned revenue liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Jan. 01, 2021
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	$ 1,834	$ 1,811
Revenue deferred	38	35
Amortization	(30)	(30)
Balance, end of period	1,842	1,816
Aggregate carrying amount in the Condensed Consolidated Balance Sheets	3,461		$ 3,463	$ 3,796
Life Insurance
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	1,727	1,693
Revenue deferred	38	35
Amortization	(27)	(27)
Balance, end of period	1,738	1,701
Institutional Markets
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	2	2
Revenue deferred	0	0
Amortization	(1)	0
Balance, end of period	1	2
Other Operations before consolidation and eliminations
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	105	116
Revenue deferred	0	0
Amortization	(2)	(3)
Balance, end of period	103	113
Other Operations before consolidation and eliminations | Fortitude RE
Other Policyholder Funds Rollforward [Roll Forward]
Balance, end of period	$ 1,600	$ 1,800