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Fair Value Measurement and Fair Value of Financial Instruments - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Foreign Exchange Contracts  
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]  
Other current assets $ 8.9
Other current liabilities 0.0
Foreign Exchange Contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)  
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]  
Other current assets 0.0
Other current liabilities 0.0
Foreign Exchange Contracts | Significant Other Observable Inputs (Level 2)  
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]  
Other current assets 8.9
Other current liabilities 0.0
Foreign Exchange Contracts | Significant Unobservable Inputs (Level 3)  
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]  
Other current assets 0.0
Other current liabilities 0.0
Cross-Currency Swap Agreement  
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]  
Other current assets 5.1
Cross-Currency Swap Agreement | Quoted Prices in Active Markets for Identical Assets (Level 1)  
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]  
Other current assets 0.0
Cross-Currency Swap Agreement | Significant Other Observable Inputs (Level 2)  
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]  
Other current assets 5.1
Cross-Currency Swap Agreement | Significant Unobservable Inputs (Level 3)  
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]  
Other current assets $ 0.0