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Settlement Guarantee Management - Collateral (Detail) - USD ($)
$ in Millions
Jun. 30, 2023
Sep. 30, 2022
Settlement Guarantee Management [Abstract]    
Restricted cash and restricted cash equivalents $ 2,907 $ 2,342
Pledged securities at market value 408 213
Letters of credit 1,717 1,582
Guarantees 1,094 950
Total $ 6,126 $ 5,087