Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details)

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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Oct. 01, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Stockholders' equity $ 1,192.8 $ 1,108.0 $ 1,254.6 $ 1,232.2  
Retained Earnings          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Stockholders' equity 842.0 812.0 699.1 666.2  
Retained Earnings | Accounting Standards Update 2018-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Stockholders' equity         $ 6.0
Accumulated Other Comprehensive Loss          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Stockholders' equity $ (108.9) $ (155.6) $ (42.4) $ (46.3)