INVESTMENTS - Fixed Maturities Available-for-sale (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Less than twelve months, fair value	$ 5,757	$ 2,196
Less than 12 months, gross unrealized losses	128	134
12 months or longer, fair value	34,832	44,061
12 months or longer, gross unrealized losses	7,730	6,836
Total fair value	40,589	46,257
Total gross unrealized losses	7,858	6,970
Corporate
Debt Securities, Available-for-sale [Line Items]
Less than twelve months, fair value	4,485	1,693
Less than 12 months, gross unrealized losses	112	119
12 months or longer, fair value	25,752	29,617
12 months or longer, gross unrealized losses	5,482	4,839
Total fair value	30,237	31,310
Total gross unrealized losses	5,594	4,958
U.S. Treasury, government and agency
Debt Securities, Available-for-sale [Line Items]
Less than twelve months, fair value	104	111
Less than 12 months, gross unrealized losses	3	2
12 months or longer, fair value	4,056	4,361
12 months or longer, gross unrealized losses	1,504	1,100
Total fair value	4,160	4,472
Total gross unrealized losses	1,507	1,102
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than twelve months, fair value	26	10
Less than 12 months, gross unrealized losses	0	0
12 months or longer, fair value	219	244
12 months or longer, gross unrealized losses	74	64
Total fair value	245	254
Total gross unrealized losses	74	64
Foreign governments
Debt Securities, Available-for-sale [Line Items]
Less than twelve months, fair value	32	8
Less than 12 months, gross unrealized losses	1	1
12 months or longer, fair value	450	514
12 months or longer, gross unrealized losses	133	109
Total fair value	482	522
Total gross unrealized losses	134	110
Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Less than twelve months, fair value	539	74
Less than 12 months, gross unrealized losses	7	1
12 months or longer, fair value	838	1,030
12 months or longer, gross unrealized losses	121	127
Total fair value	1,377	1,104
Total gross unrealized losses	128	128
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Less than twelve months, fair value	436	238
Less than 12 months, gross unrealized losses	3	0
12 months or longer, fair value	685	5,499
12 months or longer, gross unrealized losses	49	107
Total fair value	1,121	5,737
Total gross unrealized losses	52	107
Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Less than twelve months, fair value	135	62
Less than 12 months, gross unrealized losses	2	11
12 months or longer, fair value	2,832	2,796
12 months or longer, gross unrealized losses	367	490
Total fair value	2,967	2,858
Total gross unrealized losses	$ 369	$ 501