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Summary of Significant Accounting Policies - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total $ (305.2) $ (322.2)
Currency translation adjustments    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total (305.2) (322.0)
Unrealized losses on defined benefit plans    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total $ 0.0 $ (0.2)