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Commitments and Contingencies (Details)
$ in Millions
1 Months Ended 12 Months Ended
Nov. 30, 2018
account
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Loss Contingencies [Line Items]      
Loss contingency, range of possible loss, portion not accrued   $ 25.9  
Maximum amount of individual accounts receivable account   1.4  
Accrual   7.6  
Purchase obligation, due in next twelve months   7,595.3  
Purchase obligation, due in second and third year   882.4  
Purchase obligation, due in fourth and fifth year   52.6  
Purchase obligation, due after fifth year   108.4  
Purchase obligation, due in next twelve months   $ 8,253.9  
Percentage of stop loss actual estimated claims   120.00%  
Self insurance reserve and dental claims   $ 1.3 $ 1.2
StoneX Financial      
Loss Contingencies [Line Items]      
Number of accounts | account 300