CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Change in Each Component of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	$ 209,366
Balance, end of period	213,258	$ 207,398
Liability for future policyholder benefits	425	546
Accumulated other comprehensive income (loss)
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(47,852)	(44,800)
Other comprehensive income before reclassifications	2,011	(1,160)
Increase (decrease) due to amounts reclassified from AOCI	119	231
Total other comprehensive income	2,130	(929)
Balance, end of period	(45,722)	(45,729)
Net unrealized gains (losses) on debt securities
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(2,837)	(3,744)
Other comprehensive income before reclassifications	601	176
Increase (decrease) due to amounts reclassified from AOCI	(86)	(76)
Total other comprehensive income	515	100
Balance, end of period	(2,322)	(3,644)
Debt valuation adjustment (DVA)
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(1,121)	(709)
Other comprehensive income before reclassifications	775	(573)
Increase (decrease) due to amounts reclassified from AOCI	4	10
Total other comprehensive income	779	(563)
Balance, end of period	(342)	(1,272)
Cash flow hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(220)	(1,406)
Other comprehensive income before reclassifications	(136)	232
Increase (decrease) due to amounts reclassified from AOCI	143	260
Total other comprehensive income	7	492
Balance, end of period	(213)	(914)
Benefit plans
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(5,627)	(6,050)
Other comprehensive income before reclassifications	(71)	30
Increase (decrease) due to amounts reclassified from AOCI	45	47
Total other comprehensive income	(26)	77
Balance, end of period	(5,653)	(5,973)
CTA, net of hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(38,047)	(32,885)
Other comprehensive income before reclassifications	837	(1,054)
Increase (decrease) due to amounts reclassified from AOCI	12	0
Total other comprehensive income	849	(1,054)
Balance, end of period	(37,198)	(33,939)
Excluded component of fair value hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(52)	(40)
Other comprehensive income before reclassifications	6	8
Increase (decrease) due to amounts reclassified from AOCI	1	(10)
Total other comprehensive income	7	(2)
Balance, end of period	(45)	(42)
Long-duration insurance contracts
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	52	34
Other comprehensive income before reclassifications	(1)	21
Increase (decrease) due to amounts reclassified from AOCI	0	0
Total other comprehensive income	(1)	21
Balance, end of period	$ 51	$ 55