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DERIVATIVE INSTRUMENTS - Offsetting of Financial Assets and Derivative Assets (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Offsetting Assets [Line Items] |  |
Gross amount of recognized derivative assets | $ 63 | $ 187
Gross amount of liabilities offset in balance sheet | 0 | 0
Net amount of derivative assets presented in balance sheet | 63 | 187
Financial instruments, amount not offset | (26) | 0
Derivative, collateral, obligation to return securities | 0 | (45)
Derivative, collateral, obligation to return cash | (30) | (135)
Derivative asset, fair value, amount offset against collateral, subject to master netting agreement | 7 | 7
Derivative asset, not subject to master netting arrangement | 44 | 53
Derivative asset, fair value, gross asset including not subject to master netting arrangement | 107 | 240
Net amount of derivative assets presented in balance sheet | 107 | 240
Derivative asset, fair value, amount offset against collateral | 51 | 60
Securities lending, gross amounts of recognized financial instruments | 5,377 | 2,001
Securities lending, gross amounts offset in balance sheet | 0 | 0
Securities lending, net amounts of assets presented in balance sheet | 5,377 | 2,001
Securities lending, carrying value of financial instruments not offset in balance sheet | 0 | 0
Securities lending, securities collateral, not offset in balance sheet | 0 | 0
Securities lending, cash collateral, not offset in balance sheet | (5,377) | (2,001)
Securities lending, financial instruments, amount of assets offset against collateral | 0 | 0
Gross amount of recognized assets | 5,484 | 2,241
Gross amounts offset in balance sheet | 0 | 0
Net amounts of assets presented in balance sheet | 5,484 | 2,241
Carrying value of financial instruments not offset in balance sheet | (26) | 0
Securities collateral, not offset in balance sheet | 0 | (45)
Cash collateral, not offset in balance sheet | (5,407) | (2,136)
Financial instruments, amount of assets offset against collateral | 51 | 60
OTC - Bilateral |  |
Offsetting Assets [Line Items] |  |
Gross amount of recognized derivative assets | 47 | 187
Gross amount of liabilities offset in balance sheet | 0 | 0
Net amount of derivative assets presented in balance sheet | 47 | 187
Financial instruments, amount not offset | (10) | 0
Derivative, collateral, obligation to return securities | 0 | (45)
Derivative, collateral, obligation to return cash | (30) | (135)
Derivative asset, fair value, amount offset against collateral, subject to master netting agreement | 7 | 7
Derivative asset, not subject to master netting arrangement | 44 | $ 53
OTC- Cleared |  |
Offsetting Assets [Line Items] |  |
Gross amount of recognized derivative assets | 16 |
Gross amount of liabilities offset in balance sheet | 0 |
Net amount of derivative assets presented in balance sheet | 16 |
Financial instruments, amount not offset | (16) |
Derivative, collateral, obligation to return securities | 0 |
Derivative, collateral, obligation to return cash | 0 |
Derivative asset, fair value, amount offset against collateral, subject to master netting agreement | $ 0 |

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