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General (Details) - USD ($)
$ in Millions
Jan. 31, 2020
Nov. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Operating lease right-of-use assets $ 264.0  
Operating lease liability $ 272.7  
Accounting Standards Update 2016-16    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cumulative effect, decrease to retained earnings   $ 13.3
Accounting Standards Update 2016-16 | Retained Earnings    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cumulative effect, decrease to retained earnings   $ 13.3