Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill Intangible Assets (Details)

v3.10.0.1
Intangible Assets and Goodwill Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 613.1 $ 602.5
Finite-Lived Intangible Assets, Accumulated Amortization 250.7 242.8
Intangible Assets, Gross (Excluding Goodwill) 741.3 730.1
Trade Names [Member]    
Intangible Assets [Line Items]    
Indefinite-lived Intangible Assets (Excluding Goodwill) 128.2 127.6
Trade Names [Member]    
Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 0.2 0.2
Finite-Lived Intangible Assets, Accumulated Amortization 0.2 0.2
Customer Relationships [Member]    
Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 473.1 464.5
Finite-Lived Intangible Assets, Accumulated Amortization 153.9 148.4
Technology-Based Intangible Assets [Member]    
Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 79.1 79.6
Finite-Lived Intangible Assets, Accumulated Amortization 46.4 45.1
Computer Software, Intangible Asset [Member]    
Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 58.2 58.0
Finite-Lived Intangible Assets, Accumulated Amortization 49.7 48.9
Other Intangible Assets [Member]    
Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 2.5 0.2
Finite-Lived Intangible Assets, Accumulated Amortization 0.5 $ 0.2
Burnaby Machine & Mill Equipment Ltd. [Member]    
Intangible Assets [Line Items]    
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 14.0