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Commitments, Contingencies and Guarantees Commitments, Contingencies and Guarantees (Narrative) (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances $ 1,100 $ 1,400
Other Notes Payable $ 900 $ 500