INVESTMENTS - Middle Market Loans by Key Credit Quality Indicators (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loan-to-Value Ratio:
Total	$ 11,224	$ 12,801
Middle market loans
Loan-to-Value Ratio:
2024	626
2023	113
2022	673
2021	1,033
2020	663
Prior	1,169
Revolving Loans	146
Total	4,423	$ 4,677
Current-period gross writeoffs:
2024	0
2023	0
2022	0
2021	27
2020	0
Prior	23
Revolving Loans	0
Total	50
Middle market loans | BBB Credit Rating
Loan-to-Value Ratio:
2024	12
2023	27
2022	4
2021	84
2020	43
Prior	95
Revolving Loans	11
Total	276
Middle market loans | BB Credit Rating
Loan-to-Value Ratio:
2024	394
2023	45
2022	413
2021	396
2020	282
Prior	339
Revolving Loans	68
Total	1,937
Middle market loans | B Credit Rating
Loan-to-Value Ratio:
2024	220
2023	41
2022	238
2021	486
2020	264
Prior	501
Revolving Loans	41
Total	1,791
Middle market loans | CCC Credit Rating
Loan-to-Value Ratio:
2024	0
2023	0
2022	5
2021	61
2020	74
Prior	142
Revolving Loans	17
Total	299
Middle market loans | CC Credit Rating
Loan-to-Value Ratio:
2024	0
2023	0
2022	13
2021	0
2020	0
Prior	24
Revolving Loans	5
Total	42
Middle market loans | C and Lower Credit Rating
Loan-to-Value Ratio:
2024	0
2023	0
2022	0
2021	6
2020	0
Prior	68
Revolving Loans	4
Total	$ 78