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Contingencies, Commitments and Guarantees (Contingencies - Narrative) (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) Claims | Mar. 31, 2023 Claims | Dec. 31, 2023 Claims
Minimum |  |  |
Loss Contingencies |  |  |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | $ 0 |  |
Maximum |  |  |
Loss Contingencies |  |  |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | $ 125 |  |
Asbestos Related Claims |  |  |
Loss Contingencies |  |  |
Asbestos-Related Claims | Claims | 783 | 587 | 2,565

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