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Financing Arrangements (Rental Expense Under Operating Leases) (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jul. 31, 2016
Nov. 30, 2017
Nov. 30, 2016
Nov. 30, 2015
Debt Instrument [Line Items]        
2018   $ 41.7    
2019   33.4    
2020   26.2    
2021   20.4    
2022   16.6    
Thereafter   33.7    
Rental expense under operating leases   46.5 $ 41.6 $ 39.0
Headquarters building [Member]        
Debt Instrument [Line Items]        
Lease term 15 years      
Rental expense under operating leases   $ 0.9    
Lease payment adjustment period   60 months