Insurance Liabilities - Unearned revenue liability (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Jan. 01, 2021
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	$ 1,834	$ 1,811
Revenue deferred	76	70
Amortization	(61)	(60)
Balance, end of period	1,849	1,821
Aggregate carrying amount in the Condensed Consolidated Balance Sheets	3,430		$ 3,463	$ 3,796
Life Insurance
Other Policyholder Funds Rollforward [Roll Forward]
Balance, beginning of year	1,727	1,693
Revenue deferred	76	70
Amortization	(55)	(54)
Balance, end of period	1,748	1,709
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	(5)	(6)
Balance, end of period	100	110
Other Operations before consolidation and eliminations | Fortitude RE
Other Policyholder Funds Rollforward [Roll Forward]
Balance, end of period	$ 1,600	$ 1,700