INVESTMENTS - Transitional Real Estate Loans by Key Credit Quality Indicators (Details) - Transitional real estate loans $ in Millions	Dec. 31, 2022 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 2,062
2021	2,466
2020	271
2019	1,027
2018	632
Prior	51
Total Financing Receivable	6,509
Loan to Value Ratio, Zero to Fifty-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2022	532
2021	596
2020	36
2019	153
2018	61
Prior	0
Total Financing Receivable	1,378
Loan to Value Ratio, Sixty to Sixty-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2022	679
2021	769
2020	138
2019	485
2018	425
Prior	50
Total Financing Receivable	2,546
Loan to Value Ratio, Seventy to Seventy-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2022	787
2021	940
2020	97
2019	389
2018	146
Prior	1
Total Financing Receivable	2,360
Loan to Value Ratio Eighty Percent and Above
Financing Receivable, Credit Quality Indicator [Line Items]
2022	64
2021	161
2020	0
2019	0
2018	0
Prior	0
Total Financing Receivable	$ 225