INVESTMENTS - Transitional Real Estate Loans by Key Credit Quality Indicators (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total Financing Receivable	$ 13,551	$ 13,688
Transitional real estate loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	119
2022	2,314
2021	2,404
2020	269
2019	1,008
Prior	586
Total Financing Receivable	6,700
Transitional real estate loans \| Loan to Value Ratio, 0.00% to 59.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	77
2022	692
2021	588
2020	36
2019	153
Prior	10
Total Financing Receivable	1,556
Transitional real estate loans \| Loan to Value Ratio, 60.00% to 69.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	42
2022	663
2021	707
2020	135
2019	490
Prior	430
Total Financing Receivable	2,467
Transitional real estate loans \| Loan to Value Ratio, 70.00% to 79.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	882
2021	947
2020	98
2019	365
Prior	146
Total Financing Receivable	2,438
Transitional real estate loans \| Loan-to-Value Ratio, 80.00% or greater
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	77
2021	162
2020	0
2019	0
Prior	0
Total Financing Receivable	$ 239

Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

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