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Goodwill - Goodwill by Segment (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Sep. 30, 2021
Goodwill [Line Items]    
Goodwill $ 58.2 $ 58.1
Commercial    
Goodwill [Line Items]    
Goodwill 32.6 32.5
Institutional    
Goodwill [Line Items]    
Goodwill 9.8 9.8
Retail    
Goodwill [Line Items]    
Goodwill 5.8 5.8
Global Payments    
Goodwill [Line Items]    
Goodwill $ 10.0 $ 10.0