INVESTMENTS - Commercial Mortgage Loans by Key Credit Quality Indicators (Details) $ in Millions	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Total Financing Receivable	$ 13,551	$ 13,688
Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	314
2020	46
2019	591
Prior	816
Total Financing Receivable	$ 1,767
Weighted Average Debt Service Coverage Ratio	2.43
Commercial mortgage loans \| 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average Debt Service Coverage Ratio	0.00
Commercial mortgage loans \| 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average Debt Service Coverage Ratio	0.00
Commercial mortgage loans \| 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average Debt Service Coverage Ratio	2.93
Commercial mortgage loans \| 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average Debt Service Coverage Ratio	1.93
Commercial mortgage loans \| 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average Debt Service Coverage Ratio	2.45
Commercial mortgage loans \| Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average Debt Service Coverage Ratio	2.24
Commercial mortgage loans \| Loan to Value Ratio, 0.00% to 59.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 0
2022	0
2021	299
2020	46
2019	507
Prior	599
Total Financing Receivable	$ 1,451
Weighted Average Debt Service Coverage Ratio	2.52
Commercial mortgage loans \| Loan to Value Ratio, 60.00% to 69.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 0
2022	0
2021	15
2020	0
2019	45
Prior	169
Total Financing Receivable	$ 229
Weighted Average Debt Service Coverage Ratio	2.00
Commercial mortgage loans \| Loan to Value Ratio, 70.00% to 79.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 0
2022	0
2021	0
2020	0
2019	39
Prior	24
Total Financing Receivable	$ 63
Weighted Average Debt Service Coverage Ratio	2.21
Commercial mortgage loans \| Loan-to-Value Ratio, 80.00% or greater
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 0
2022	0
2021	0
2020	0
2019	0
Prior	24
Total Financing Receivable	$ 24
Weighted Average Debt Service Coverage Ratio	1.41

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