Financial Services, Insurance, ASU 2018-12 Transition (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Policyholder Account Balance [Line Items]
Policyholder Account Balance	$ 32,460	$ 32,942
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance [Line Items]
Policyholder Account Balance	15,640	21,507
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance [Line Items]
Policyholder Account Balance	7,044	2,895
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0100
Policyholder Account Balance [Line Items]
Policyholder Account Balance	2,934	1,938
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0101 to 0150
Policyholder Account Balance [Line Items]
Policyholder Account Balance	1,142	1,113
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 to 0200
Policyholder Account Balance [Line Items]
Policyholder Account Balance	1,488	1,464
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0200 and Greater
Policyholder Account Balance [Line Items]
Policyholder Account Balance	39	103
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0001 to 0100
Policyholder Account Balance [Line Items]
Policyholder Account Balance	12,501	12,784
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0001 to 0100 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance [Line Items]
Policyholder Account Balance	26	5,349
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0001 to 0100 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance [Line Items]
Policyholder Account Balance	6,917	2,857
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0001 to 0100 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0100
Policyholder Account Balance [Line Items]
Policyholder Account Balance	2,894	1,903
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0001 to 0100 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0101 to 0150
Policyholder Account Balance [Line Items]
Policyholder Account Balance	1,141	1,112
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0001 to 0100 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 to 0200
Policyholder Account Balance [Line Items]
Policyholder Account Balance	1,485	1,461
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0001 to 0100 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0200 and Greater
Policyholder Account Balance [Line Items]
Policyholder Account Balance	38	102
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0100 to 0199
Policyholder Account Balance [Line Items]
Policyholder Account Balance	292	309
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0100 to 0199 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance [Line Items]
Policyholder Account Balance	156	246
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0100 to 0199 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance [Line Items]
Policyholder Account Balance	95	27
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0100 to 0199 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0100
Policyholder Account Balance [Line Items]
Policyholder Account Balance	39	34
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0100 to 0199 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0101 to 0150
Policyholder Account Balance [Line Items]
Policyholder Account Balance	1	1
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0100 to 0199 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 to 0200
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0100 to 0199 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0200 and Greater
Policyholder Account Balance [Line Items]
Policyholder Account Balance	1	1
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0200 to 0299
Policyholder Account Balance [Line Items]
Policyholder Account Balance	6,893	7,200
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0200 to 0299 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance [Line Items]
Policyholder Account Balance	6,860	7,188
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0200 to 0299 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance [Line Items]
Policyholder Account Balance	32	11
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0200 to 0299 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0100
Policyholder Account Balance [Line Items]
Policyholder Account Balance	1	1
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0200 to 0299 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0101 to 0150
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0200 to 0299 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 to 0200
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0200 to 0299 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0200 and Greater
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399
Policyholder Account Balance [Line Items]
Policyholder Account Balance	8,214	8,329
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance [Line Items]
Policyholder Account Balance	8,214	8,329
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0100
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0101 to 0150
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 to 0200
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0200 and Greater
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater
Policyholder Account Balance [Line Items]
Policyholder Account Balance	4	4
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance [Line Items]
Policyholder Account Balance	4	4
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0100
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0101 to 0150
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 to 0200
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0200 and Greater
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Renewable Beyond 12 Months
Policyholder Account Balance [Line Items]
Policyholder Account Balance	383	394
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Renewable Beyond 12 Months | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Policyholder Account Balance [Line Items]
Policyholder Account Balance	380	391
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Renewable Beyond 12 Months | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Renewable Beyond 12 Months | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0100
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Renewable Beyond 12 Months | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0101 to 0150
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Renewable Beyond 12 Months | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 to 0200
Policyholder Account Balance [Line Items]
Policyholder Account Balance	3	3
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Renewable Beyond 12 Months | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0200 and Greater
Policyholder Account Balance [Line Items]
Policyholder Account Balance	0	0
Total discretionary rate setting products
Policyholder Account Balance [Line Items]
Policyholder Account Balance	28,287	29,020
Retirement
Policyholder Account Balance [Line Items]
Policyholder Account Balance	27,448	27,951	$ 27,095
Policyholder Account Balance, Premium Received	591	2,850
Policyholder Account Balance, Policy Charge	(2)	(8)
Policyholder Account Balance, Surrender and Withdrawal	(1,338)	(3,774)
Policyholder Account Balance, Benefit Payment	(30)	(113)
Transfer to (from) Policyholder Account Balance (to) from Separate Account	94	1,174
Policyholder Account Balance, Interest Expense	181	714
Policyholder Account Balance, Increase (Decrease) from Other Change	$ 1	$ 13
Policyholder Account Balance, Weighted Average Crediting Rate	2.60%	2.60%
Policyholder Account Balance, Net Amount at Risk	$ 132	$ 154
Policyholder Account Balance, Cash Surrender Value	27,071	27,567
Other Segments
Policyholder Account Balance [Line Items]
Policyholder Account Balance	$ 5,012	$ 4,991