INVESTMENTS - Transitional Real Estate Loans by Key Credit Quality Indicators (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total Financing Receivable	$ 12,801	$ 13,688
Transitional real estate loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	357
2022	2,189
2021	2,321
2020	219
2019	635
Prior	393
Total Financing Receivable	6,114
Gross writeoffs, 2023	0
Gross writeoffs, 2022	0
Gross writeoffs, 2021	0
Gross writeoffs, 2020	4
Gross writeoffs, 2019	12
Gross writeoffs, Prior	50
Gross writeoffs, Total	66
Transitional real estate loans | Loan to Value Ratio, Zero to Fifty-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2023	252
2022	603
2021	506
2020	36
2019	125
Prior	2
Total Financing Receivable	1,524
Transitional real estate loans | Loan to Value Ratio, Sixty to Sixty-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2023	91
2022	534
2021	667
2020	18
2019	420
Prior	123
Total Financing Receivable	1,853
Transitional real estate loans | Loan to Value Ratio, Seventy to Seventy-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2023	14
2022	835
2021	898
2020	85
2019	3
Prior	64
Total Financing Receivable	1,899
Transitional real estate loans | Loan to Value Ratio Eighty Percent and Above
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	217
2021	250
2020	80
2019	87
Prior	204
Total Financing Receivable	$ 838