INVESTMENTS - Transitional Real Estate Loans by Key Credit Quality Indicators (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Loan-to-Value Ratio:
Total	$ 11,024	$ 11,224
Transitional real estate loans
Loan-to-Value Ratio:
2025	14
2024	0
2023	91
2022	1,960
2021	1,810
Prior	803
Total	4,678	$ 4,902
Current-period gross writeoffs:
2025	0
2024	0
2023	0
2022	0
2021	0
Prior	24
Total	24
Transitional real estate loans | Loan to Value Ratio, 0.00% to 59.99%
Loan-to-Value Ratio:
2025	0
2024	0
2023	0
2022	371
2021	390
Prior	47
Total	808
Transitional real estate loans | Loan to Value Ratio, 60.00% to 69.99%
Loan-to-Value Ratio:
2025	0
2024	0
2023	77
2022	431
2021	442
Prior	396
Total	1,346
Transitional real estate loans | Loan to Value Ratio, 70.00% to 79.99%
Loan-to-Value Ratio:
2025	14
2024	0
2023	14
2022	823
2021	625
Prior	64
Total	1,540
Transitional real estate loans | Loan-to-Value Ratio, 80.00% or greater
Loan-to-Value Ratio:
2025	0
2024	0
2023	0
2022	335
2021	353
Prior	296
Total	$ 984