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Commitments, Contingencies and Guarantees (Narrative) (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances $ 1,400 $ 1,100
Other Notes Payable $ 2,700 $ 1,300