INVESTMENTS - Commercial Mortgage Loans by Key Credit Quality Indicator (Details) - Commercial mortgage loans $ in Millions	Dec. 31, 2022 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 228
2021	325
2020	46
2019	596
2018	151
Prior	676
Total Financing Receivable	$ 2,022
Weighted average debt-service coverage ratio	2.14
2022
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted average debt-service coverage ratio	0.00
2021
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted average debt-service coverage ratio	2.83
2020
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted average debt-service coverage ratio	1.92
2019
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted average debt-service coverage ratio	2.50
2018
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted average debt-service coverage ratio	2.02
Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted average debt-service coverage ratio	2.26
Loan to Value Ratio, Zero to Fifty-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 228
2021	310
2020	46
2019	510
2018	151
Prior	492
Total Financing Receivable	$ 1,737
Weighted average debt-service coverage ratio	2.16
Loan to Value Ratio, Sixty to Sixty-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 0
2021	15
2020	0
2019	46
2018	0
Prior	135
Total Financing Receivable	$ 196
Weighted average debt-service coverage ratio	2.03
Loan to Value Ratio, Seventy to Seventy-nine Point Nine-nine Percent
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 0
2021	0
2020	0
2019	40
2018	0
Prior	24
Total Financing Receivable	$ 64
Weighted average debt-service coverage ratio	2.21
Loan to Value Ratio Eighty Percent and Above
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 0
2021	0
2020	0
2019	0
2018	0
Prior	25
Total Financing Receivable	$ 25
Weighted average debt-service coverage ratio	1.41

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