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Derivatives - Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Derivative [Line Items] |  |
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other Investments | Other Investments
Asset Derivatives | $ 71 | $ 57
Derivative assets | 47 | (1)
Gross Amounts of Recognized (Liabilities) | (46) | (50)
Derivative Liability | (22) | 8
Other liabilities |  |
Derivative [Line Items] |  |
Derivative, Collateral, Obligation to Return Cash | (15) | 22
Gross Amounts of Recognized (Liabilities) | (46) | (50)
Gross Amounts Offset in the Statement of Financial Position, liabilities | (39) | (36)
Derivative Liability | (22) | 8
Financial Collateral (Received) | (6) | (13)
Net amount, liabilities | (1) | (1)
Other investments |  |
Derivative [Line Items] |  |
Asset Derivatives | 71 | 57
Gross Amounts Offset in the Statement of Financial Position, assets | 67 | 55
Derivative assets | 47 | (1)
Derivative, Collateral, Obligation to Return Cash | 43 | (3)
Financial Collateral Pledged | 0 | 0
Net Amount, assets | $ 4 | $ 2

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