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INVESTMENTS - Amortized Cost of Loans by Credit Quality Indicator and Origination Year (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost Basis by Origination Year |  |
Total | $ 18,867 | $ 18,450
Residential mortgages: |  |
Amortized Cost Basis by Origination Year |  |
Current fiscal year | 0 | 98
Fiscal year before current fiscal year | 373 | 121
Two years before current fiscal year | 139 | 74
Three years before current fiscal year | 90 | 2
Four years before current fiscal year | 3 | 1
Prior | 2 | 2
Total | 607 | 298
Residential mortgages: | Performing |  |
Amortized Cost Basis by Origination Year |  |
Current fiscal year | 0 | 98
Fiscal year before current fiscal year | 373 | 121
Two years before current fiscal year | 139 | 74
Three years before current fiscal year | 90 | 2
Four years before current fiscal year | 3 | 1
Prior | 2 | 2
Total | 607 | 298
Residential mortgages: | Nonperforming |  |
Amortized Cost Basis by Origination Year |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 0
Two years before current fiscal year | 0 | 0
Three years before current fiscal year | 0 | 0
Four years before current fiscal year | 0 | 0
Prior | 0 | 0
Total | $ 0 | $ 0

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