Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill Intangible Assets (Details)

v3.8.0.1
Intangible Assets and Goodwill Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2017
Jun. 30, 2016
Sep. 30, 2017
Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross $ 609.9   $ 598.1
Finite-Lived Intangible Assets, Accumulated Amortization 220.9   207.6
Intangible Assets, Gross (Excluding Goodwill) 744.0   731.5
Trade Names [Member]      
Intangible Assets [Line Items]      
Indefinite-Lived Intangible Assets (Excluding Goodwill) 134.1   133.4
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   $ 2.2  
Trade Names [Member] | Concentration Risk Type [Domain]      
Intangible Assets [Line Items]      
Indefinite-Lived Intangible Assets (Excluding Goodwill) $ 13.0    
Minimum      
Intangible Assets [Line Items]      
Finite-Lived Intangible Asset, Useful Life 3 years    
Maximum      
Intangible Assets [Line Items]      
Finite-Lived Intangible Asset, Useful Life 21 years    
Trade Names [Member]      
Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross $ 0.2   0.2
Finite-Lived Intangible Assets, Accumulated Amortization 0.1   0.1
Customer Relationships [Member]      
Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 471.2   468.7
Finite-Lived Intangible Assets, Accumulated Amortization 132.4   125.9
Technology-Based Intangible Assets [Member]      
Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 81.3   80.7
Finite-Lived Intangible Assets, Accumulated Amortization 41.6   39.9
Computer Software, Intangible Asset [Member]      
Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 57.0   48.3
Finite-Lived Intangible Assets, Accumulated Amortization 46.6   41.5
Other Intangible Assets [Member]      
Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 0.2   0.2
Finite-Lived Intangible Assets, Accumulated Amortization $ 0.2   $ 0.2