Insurance Liabilities - Policyholder contract deposit (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Jan. 01, 2021
Policyholder Account Balance [Roll Forward]
Policyholder contract deposits account balance, beginning of year	$ 158,494	$ 152,809
Issuances	6,821	5,206
Deposits received	389	402
Policy charges	(771)	(735)
Surrenders and withdrawals	(5,666)	(3,471)
Benefit payments	(1,897)	(1,791)
Net transfers from (to) separate account	1,762	1,145
Interest credited	883	984
Other	(12)	(31)
Policyholder Contract Deposits Account Balance, end of period	160,003	154,518
Other reconciling items	(2,107)	(2,203)
Legacy insurance lines ceded to Fortitude Re	157,896	152,315	$ 155,984	$ 148,223
Cash surrender value(c)	139,467	136,851
Individual Retirement
Policyholder Account Balance [Roll Forward]
Policyholder contract deposits account balance, beginning of year	89,554	84,097
Issuances	4,863	3,896
Deposits received	1	3
Policy charges	(244)	(185)
Surrenders and withdrawals	(3,171)	(1,994)
Benefit payments	(1,036)	(1,017)
Net transfers from (to) separate account	728	529
Interest credited	377	500
Other	(2)	2
Policyholder Contract Deposits Account Balance, end of period	91,070	85,831
Other reconciling items	(1,889)	(1,859)
Legacy insurance lines ceded to Fortitude Re	$ 89,181	$ 83,972
Weighted average crediting rate	2.52%	2.36%
Cash surrender value(c)	$ 84,906	$ 80,438
Group Retirement
Policyholder Account Balance [Roll Forward]
Policyholder contract deposits account balance, beginning of year	43,395	43,902
Issuances	1,320	1,152
Deposits received	6	8
Policy charges	(110)	(127)
Surrenders and withdrawals	(2,016)	(1,396)
Benefit payments	(557)	(544)
Net transfers from (to) separate account	592	616
Interest credited	270	277
Other	3	(1)
Policyholder Contract Deposits Account Balance, end of period	42,903	43,887
Other reconciling items	(279)	(330)
Legacy insurance lines ceded to Fortitude Re	$ 42,624	$ 43,557
Weighted average crediting rate	2.78%	2.71%
Cash surrender value(c)	$ 41,361	$ 43,193
Life Insurance
Policyholder Account Balance [Roll Forward]
Policyholder contract deposits account balance, beginning of year	10,224	10,183
Issuances	49	73
Deposits received	365	369
Policy charges	(384)	(389)
Surrenders and withdrawals	(56)	(45)
Benefit payments	(49)	(69)
Net transfers from (to) separate account	(1)	0
Interest credited	88	101
Other	(16)	(31)
Policyholder Contract Deposits Account Balance, end of period	10,220	10,192
Other reconciling items	116	24
Legacy insurance lines ceded to Fortitude Re	$ 10,336	$ 10,216
Weighted average crediting rate	4.24%	4.23%
Cash surrender value(c)	$ 8,874	$ 8,830
Institutional Markets
Policyholder Account Balance [Roll Forward]
Policyholder contract deposits account balance, beginning of year	11,734	10,804
Issuances	586	82
Deposits received	9	13
Policy charges	(17)	(17)
Surrenders and withdrawals	(403)	(22)
Benefit payments	(167)	(72)
Net transfers from (to) separate account	443	3
Interest credited	105	61
Other	4	(7)
Policyholder Contract Deposits Account Balance, end of period	12,294	10,845
Other reconciling items	74	94
Legacy insurance lines ceded to Fortitude Re	$ 12,368	$ 10,939
Weighted average crediting rate	3.55%	2.30%
Cash surrender value(c)	$ 2,545	$ 2,529
Other Operations before consolidation and eliminations
Policyholder Account Balance [Roll Forward]
Policyholder contract deposits account balance, beginning of year	3,587	3,823
Issuances	3	3
Deposits received	8	9
Policy charges	(16)	(17)
Surrenders and withdrawals	(20)	(14)
Benefit payments	(88)	(89)
Net transfers from (to) separate account	0	(3)
Interest credited	43	45
Other	(1)	6
Policyholder Contract Deposits Account Balance, end of period	3,516	3,763
Other reconciling items	(129)	(132)
Legacy insurance lines ceded to Fortitude Re	$ 3,387	$ 3,631
Weighted average crediting rate	4.95%	4.88%
Cash surrender value(c)	$ 1,781	$ 1,861