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Description of Business and Basis of Presentation - Narrative (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations
€ in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jan. 02, 2020
EUR (€)
Jan. 02, 2020
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Initial cash proceeds € 180.0   $ 6.9 $ 6.9
VARTAAG        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Initial cash proceeds   $ 323.1    
Pre-tax loss     $ 137.6 $ 137.6