CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Change in Each Component of AOCI (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023	Jun. 30, 2022
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					$ 201,838
Balance, end of period	$ 209,422		$ 199,626		209,422	$ 199,626
Liability for future policyholder benefits	560				560
Net unrealized gains (losses) on debt securities
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(5,162)		(4,891)		(5,998)	(614)
Other comprehensive income before reclassifications	133		(1,612)		988	(5,895)
Increase (decrease) due to amounts reclassified from AOCI	(7)		111		(26)	117
Total other comprehensive income	126		(1,501)		962	(5,778)
Balance, end of period	(5,036)		(6,392)		(5,036)	(6,392)
Net unrealized gains (losses) on debt securities | Cumulative Effect, Period of Adoption, Adjustment
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					0
Net unrealized gains (losses) on debt securities | Cumulative Effect, Period of Adoption, Adjusted Balance
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					(5,998)
Debt valuation adjustment (DVA)
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	517		(394)		842	(1,187)
Other comprehensive income before reclassifications	(613)		1,968		(940)	2,761
Increase (decrease) due to amounts reclassified from AOCI	(6)		(1)		(4)	(1)
Total other comprehensive income	(619)		1,967		(944)	2,760
Balance, end of period	(102)		1,573		(102)	1,573
Debt valuation adjustment (DVA) | Cumulative Effect, Period of Adoption, Adjustment
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					0
Debt valuation adjustment (DVA) | Cumulative Effect, Period of Adoption, Adjusted Balance
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					842
Cash flow hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(2,161)		(1,440)		(2,522)	101
Other comprehensive income before reclassifications	(206)		(515)		(200)	(1,839)
Increase (decrease) due to amounts reclassified from AOCI	377		(151)		732	(368)
Total other comprehensive income	171		(666)		532	(2,207)
Balance, end of period	(1,990)		(2,106)		(1,990)	(2,106)
Cash flow hedges | Cumulative Effect, Period of Adoption, Adjustment
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					0
Cash flow hedges | Cumulative Effect, Period of Adoption, Adjusted Balance
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					(2,522)
Benefit plans
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(5,859)		(5,681)		(5,755)	(5,852)
Other comprehensive income before reclassifications	(170)		(271)		(302)	21
Increase (decrease) due to amounts reclassified from AOCI	34		182		62	61
Total other comprehensive income	(136)		(89)		(240)	82
Balance, end of period	(5,995)		(5,770)		(5,995)	(5,770)
Benefit plans | Cumulative Effect, Period of Adoption, Adjustment
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					0
Benefit plans | Cumulative Effect, Period of Adoption, Adjusted Balance
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					(5,755)
CTA, net of hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(32,796)		(31,180)		(33,637)	(31,166)
Other comprehensive income before reclassifications	23		(1,975)		864	(1,989)
Increase (decrease) due to amounts reclassified from AOCI	0		345		0	345
Total other comprehensive income	23		(1,630)		864	(1,644)
Balance, end of period	(32,773)		(32,810)		(32,773)	(32,810)
CTA, net of hedges | Cumulative Effect, Period of Adoption, Adjustment
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					0
CTA, net of hedges | Cumulative Effect, Period of Adoption, Adjusted Balance
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					(33,637)
Excluded component of fair value hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(12)		1		8	(47)
Other comprehensive income before reclassifications	27		4		11	50
Increase (decrease) due to amounts reclassified from AOCI	(10)		5		(14)	7
Total other comprehensive income	17		9		(3)	57
Balance, end of period	5		10		5	10
Excluded component of fair value hedges | Cumulative Effect, Period of Adoption, Adjustment
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					0
Excluded component of fair value hedges | Cumulative Effect, Period of Adoption, Adjusted Balance
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					8
Long-duration insurance contracts
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	32		0		0	0
Other comprehensive income before reclassifications	(6)		0		(1)	0
Increase (decrease) due to amounts reclassified from AOCI	0		0		0	0
Total other comprehensive income	(6)		0		(1)	0
Balance, end of period	26		0		26	0
Long-duration insurance contracts | Cumulative Effect, Period of Adoption, Adjustment
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					27
Long-duration insurance contracts | Cumulative Effect, Period of Adoption, Adjusted Balance
Change in accumulated other comprehensive income (loss)
Balance, beginning of period					27
Accumulated other comprehensive income (loss)
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(45,441)		(43,585)		(47,062)	(38,765)
Other comprehensive income before reclassifications	(812)		(2,401)		420	(6,891)
Increase (decrease) due to amounts reclassified from AOCI	388		491		750	161
Total other comprehensive income	(424)		(1,910)		1,170	(6,730)
Balance, end of period	(45,865)		(45,495)		(45,865)	(45,495)
Accumulated other comprehensive income (loss) | Cumulative Effect, Period of Adoption, Adjustment
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	0	[1]	0	[1]	27	0
Accumulated other comprehensive income (loss) | Cumulative Effect, Period of Adoption, Adjusted Balance
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	$ (45,441)		$ (43,585)		$ (47,035)	$ (38,765)

[1] See Note 1 for additional details.