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Contingencies (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Mar. 31, 2022
Insurance Litigation      
Loss Contingencies [Line Items]      
Net settlement amount $ 20.2 $ 22.7 $ 22.7