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Settlement Guarantee Management (Tables)
 3 Months Ended
Dec. 31, 2022
Settlement Guarantee Management [Abstract]  
Schedule of Customer Collateral The Company held the following collateral to manage settlement exposure:
December 31,
2022		September 30,
2022
 (in millions)
Restricted cash and restricted cash equivalents$2,591 $2,342 
Pledged securities at market value255 213 
Letters of credit1,659 1,582 
Guarantees984 950 
Total$5,489 $5,087