INSURANCE LIABILITIES AND ANNUITY BENEFITS - Changes in Future Policy Benefit Reserves (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Present value of expected future policy benefits
Future policy benefit reserves	$ 36,876		$ 34,593	$ 48,763
Less: Reinsurance recoverables, net of allowance for credit losses					$ (7,095)
Net future policy benefit reserves, after reinsurance recoverables					48,856
Long-term care
Present value of expected net premiums
Balance, beginning of year	4,059	$ 5,652	5,652	6,397
Beginning balance at locked-in discount rate	3,958	4,451	4,451	4,822
Interest accrual	53	59	223	241
Net premiums collected	(103)	(113)	(417)	(453)
Effect of foreign currency	0	0	0	0
Ending balance at locked-in discount rate	3,937	4,267	3,958	4,451
Effect of changes in discount rate assumptions	281	696	101	1,201
Balance, end of year	4,217	4,963	4,059	5,652
Present value of expected future policy benefits
Balance, beginning of year	28,316	40,296	40,296	43,974
Beginning balance at locked-in discount rate	27,100	27,425	27,026	27,465		$ 27,745
Interest accrual	363	365	1,446	1,435
Benefit payments	(309)	(274)	(1,152)	(1,058)
Effect of foreign currency	0	0	0	0
Ending balance at locked-in discount rate	27,100	27,425	27,026	27,465
Effect of changes in discount rate assumptions	3,171	7,852	1,290	12,831
Balance, end of year	30,271	35,277	28,316	40,296
Future policy benefit reserves	26,054	30,314	24,256	34,644
Less: Reinsurance recoverables, net of allowance for credit losses	(204)	(5,154)	(171)	(6,473)	(7,036)
Net future policy benefit reserves, after reinsurance recoverables	25,850	25,160	24,085	28,171	30,541
Long-term care | Beginning balance adjustments, quarterly activity
Present value of expected net premiums
Effect of changes in cash flow assumptions			0	0
Effect of actual variances from expected experience			29	(130)
Adjusted beginning of year balance			3,987	4,321
Present value of expected future policy benefits
Effect of changes in cash flow assumptions			(11)	0
Effect of actual variances from expected experience			30	(130)
Adjusted beginning of year balance			27,046	27,335
Long-term care | Beginning balance adjustments, annual activity
Present value of expected net premiums
Effect of changes in cash flow assumptions				(9)		(91)
Effect of actual variances from expected experience				(290)		(68)
Adjusted beginning of year balance				4,152		4,663
Present value of expected future policy benefits
Effect of changes in cash flow assumptions				(413)		(509)
Effect of actual variances from expected experience				(320)		(147)
Adjusted beginning of year balance				26,732		27,089
Structured settlement annuities
Present value of expected net premiums
Balance, beginning of year	0	0	0	0
Beginning balance at locked-in discount rate	0	0	0	0
Interest accrual	0	0	0	0
Net premiums collected	0	0	0	0
Effect of foreign currency	0	0	0	0
Ending balance at locked-in discount rate	0	0	0	0
Effect of changes in discount rate assumptions	0	0	0	0
Balance, end of year	0	0	0	0
Present value of expected future policy benefits
Balance, beginning of year	8,860	12,328	12,328	13,531
Beginning balance at locked-in discount rate	8,730	8,978	8,790	9,024		9,163
Interest accrual	115	119	471	491
Benefit payments	(174)	(162)	(671)	(678)
Effect of foreign currency	0	0	0	0
Ending balance at locked-in discount rate	8,730	8,978	8,790	9,024
Effect of changes in discount rate assumptions	619	1,870	70	3,305
Balance, end of year	9,349	10,848	8,860	12,328
Future policy benefit reserves	9,349	10,848	8,860	12,328
Less: Reinsurance recoverables, net of allowance for credit losses	0	0	0	0	0
Net future policy benefit reserves, after reinsurance recoverables	9,349	10,848	8,860	12,328	13,532
Structured settlement annuities | Beginning balance adjustments, quarterly activity
Present value of expected net premiums
Effect of changes in cash flow assumptions			0	0
Effect of actual variances from expected experience			0	0
Adjusted beginning of year balance			0	0
Present value of expected future policy benefits
Effect of changes in cash flow assumptions			0	0
Effect of actual variances from expected experience			(1)	(3)
Adjusted beginning of year balance			8,789	9,021
Structured settlement annuities | Beginning balance adjustments, annual activity
Present value of expected net premiums
Effect of changes in cash flow assumptions				0		0
Effect of actual variances from expected experience				0		0
Adjusted beginning of year balance				0		0
Present value of expected future policy benefits
Effect of changes in cash flow assumptions				(23)		58
Effect of actual variances from expected experience				(11)		(11)
Adjusted beginning of year balance				8,990		9,210
Life
Present value of expected net premiums
Balance, beginning of year	4,828	6,622	6,622	7,205
Beginning balance at locked-in discount rate	5,210	5,443	5,443	5,518
Interest accrual	50	52	203	203
Net premiums collected	(73)	(83)	(357)	(392)
Effect of foreign currency	(23)	73	(176)	(9)
Ending balance at locked-in discount rate	5,129	5,487	5,210	5,443
Effect of changes in discount rate assumptions	(149)	396	(381)	1,179
Balance, end of year	4,979	5,883	4,828	6,622
Present value of expected future policy benefits
Balance, beginning of year	5,868	7,923	7,923	8,767
Beginning balance at locked-in discount rate	6,148	6,570	6,247	6,560		6,797
Interest accrual	60	62	243	248
Benefit payments	(138)	(148)	(531)	(638)
Effect of foreign currency	(24)	77	(185)	(10)
Ending balance at locked-in discount rate	6,148	6,570	6,247	6,560
Effect of changes in discount rate assumptions	(123)	488	(380)	1,363
Balance, end of year	6,025	7,058	5,868	7,923
Future policy benefit reserves	1,045	1,175	1,040	1,301
Less: Reinsurance recoverables, net of allowance for credit losses	(57)	(81)	(67)	(87)	(15)
Net future policy benefit reserves, after reinsurance recoverables	$ 988	$ 1,094	973	1,214	$ 1,546
Life | Beginning balance adjustments, quarterly activity
Present value of expected net premiums
Effect of changes in cash flow assumptions			0	0
Effect of actual variances from expected experience			(35)	2
Adjusted beginning of year balance			5,175	5,445
Present value of expected future policy benefits
Effect of changes in cash flow assumptions			0	0
Effect of actual variances from expected experience			2	19
Adjusted beginning of year balance			$ 6,250	6,579
Life | Beginning balance adjustments, annual activity
Present value of expected net premiums
Effect of changes in cash flow assumptions				91		191
Effect of actual variances from expected experience				6		(69)
Adjusted beginning of year balance				5,540		5,640
Present value of expected future policy benefits
Effect of changes in cash flow assumptions				120		207
Effect of actual variances from expected experience				40		(43)
Adjusted beginning of year balance				$ 6,720		$ 6,961