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Contingencies, Commitments and Guarantees (Contingencies - Narrative) (Details)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
Claims
Sep. 30, 2024
Claims
Dec. 31, 2024
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 2,013 2,251 2,936