Contractholder Funds - Summary of Balances and Changes in Contractholder Funds (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Policyholder Account Balance [Roll Forward]
Balance, beginning of year	$ 40,843
Balance, end of year	43,379		$ 40,843
Embedded derivative adjustments	2	$ (3)
Gross Liability, end of period	43,379		40,843	$ 34,753
FIA
Policyholder Account Balance [Roll Forward]
Balance, beginning of year	24,766	21,997	21,997	18,703
Issuances	1,186		4,462	4,400
Premiums received	25		106	103
Policy charge	(42)		(166)	(148)
Surrenders and withdrawals	(403)		(1,322)	(1,303)
Benefit payments	(121)		(485)	(440)
Interest credited	21		198	686
Other	23		(24)	(4)
Balance, end of year	25,455		24,766	21,997
Embedded derivative adjustments	(12)		(343)	603
Gross Liability, end of period	25,443		24,423	22,600
Less: Reinsurance	(17)		(17)	(17)
Net Liability, after Reinsurance	$ 25,426		$ 24,406	$ 22,583
Weighted-average crediting rate	0.33%		0.85%	3.43%
Cash surrender value	$ 23,726		$ 188	$ 20,455
Fixed Rate Annuities
Policyholder Account Balance [Roll Forward]
Balance, beginning of year	9,358	6,367	6,367	5,142
Issuances	1,522		3,758	1,743
Premiums received	1		3	3
Policy charge	0		(1)	(1)
Surrenders and withdrawals	(257)		(797)	(543)
Benefit payments	(59)		(192)	(145)
Interest credited	81		220	167
Other	(1)		0	1
Balance, end of year	10,645		9,358	6,367
Embedded derivative adjustments	0		0	0
Gross Liability, end of period	10,645		9,358	6,367
Less: Reinsurance	(4,691)		(3,723)	(1,692)
Net Liability, after Reinsurance	$ 5,954		$ 5,635	$ 4,675
Weighted-average crediting rate	0.00%		0.00%	0.00%
Cash surrender value	$ 9,929		$ 5,992	$ 5,992
Universal Life
Policyholder Account Balance [Roll Forward]
Balance, beginning of year	2,112	1,907	1,907	1,696
Issuances	49		167	114
Premiums received	87		295	233
Policy charge	(60)		(209)	(167)
Surrenders and withdrawals	(21)		(74)	(68)
Benefit payments	(10)		(22)	(19)
Interest credited	5		48	118
Other	0		0	0
Balance, end of year	2,162		2,112	1,907
Embedded derivative adjustments	45		15	74
Gross Liability, end of period	2,207		2,127	1,981
Less: Reinsurance	(933)		(947)	(984)
Net Liability, after Reinsurance	$ 1,274		$ 1,180	$ 997
Weighted-average crediting rate	1.00%		2.39%	6.77%
Net amount at risk	$ 49,426		$ 53,348	$ 41,326
Cash surrender value	1,724		1,698	1,572
Funding Agreements, FABN
Policyholder Account Balance [Roll Forward]
Balance, beginning of year	2,613	1,904	1,904	0
Issuances	0		700	1,899
Premiums received	0		0	0
Policy charge	0		0	0
Surrenders and withdrawals	0		0	0
Benefit payments	(15)		(35)	(7)
Interest credited	13		45	12
Other	0		(1)	0
Balance, end of year	2,611		2,613	1,904
Embedded derivative adjustments	0		0	0
Gross Liability, end of period	2,611		2,613	1,904
Less: Reinsurance	0		0	0
Net Liability, after Reinsurance	2,611		2,613	1,904
Federal Home Loan Bank Funding Agreements
Policyholder Account Balance [Roll Forward]
Balance, beginning of year	1,982	$ 1,543	1,543	1,203
Issuances	256		1,192	759
Premiums received	0		0	0
Policy charge	0		0	0
Surrenders and withdrawals	0		0	0
Benefit payments	(110)		(789)	(447)
Interest credited	11		36	30
Other	0		0	(2)
Balance, end of year	2,139		1,982	1,543
Embedded derivative adjustments	0		0	0
Gross Liability, end of period	2,139		1,982	1,543
Less: Reinsurance	0		0	0
Net Liability, after Reinsurance	$ 2,139		$ 1,982	$ 1,543