INVESTMENTS - Transitional Real Estate Loans by Key Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 13,571	$ 13,688
Transitional real estate loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	158
2022	2,362
2021	2,430
2020	272
2019	1,015
Prior	538
Total	6,775
Transitional real estate loans \| Loan to Value Ratio, 0.00% to 59.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	116
2022	653
2021	598
2020	36
2019	153
Prior	10
Total	1,566
Transitional real estate loans \| Loan to Value Ratio, 60.00% to 69.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	42
2022	733
2021	751
2020	136
2019	497
Prior	382
Total	2,541
Transitional real estate loans \| Loan to Value Ratio, 70.00% to 79.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	868
2021	918
2020	100
2019	365
Prior	146
Total	2,397
Transitional real estate loans \| Loan-to-Value Ratio, 80.00% or greater
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	108
2021	163
2020	0
2019	0
Prior	0
Total	$ 271

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