INVESTMENTS - Commercial Mortgage Loans by Key Credit Quality Indicators (Details) $ in Millions	9 Months Ended
Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 11,828	$ 12,801
Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	13
2023	33
2022	0
2021	293
2020	58
Prior	1,178
Total	$ 1,575	$ 1,709
Weighted Average DSCR	2.50
2024	$ 0
2023	0
2022	0
2021	0
2020	0
Prior	3
Total	$ 3
Commercial mortgage loans \| 2024
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average DSCR	1.21
Commercial mortgage loans \| 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average DSCR	2.62
Commercial mortgage loans \| 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average DSCR	0.00
Commercial mortgage loans \| 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average DSCR	3.15
Commercial mortgage loans \| 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average DSCR	2.59
Commercial mortgage loans \| Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Weighted Average DSCR	2.35
Commercial mortgage loans \| Loan to Value Ratio, 0.00% to 59.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 0
2023	33
2022	0
2021	268
2020	58
Prior	935
Total	$ 1,294
Weighted Average DSCR	2.78
Commercial mortgage loans \| Loan to Value Ratio, 60.00% to 69.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 0
2023	0
2022	0
2021	25
2020	0
Prior	46
Total	$ 71
Weighted Average DSCR	2.11
Commercial mortgage loans \| Loan to Value Ratio, 70.00% to 79.99%
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 13
2023	0
2022	0
2021	0
2020	0
Prior	88
Total	$ 101
Weighted Average DSCR	1.25
Commercial mortgage loans \| Loan-to-Value Ratio, 80.00% or greater
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 0
2023	0
2022	0
2021	0
2020	0
Prior	109
Total	$ 109
Weighted Average DSCR	0.65

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