Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill Intangible Assets (Details)

v3.19.2
Intangible Assets and Goodwill Intangible Assets (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Sep. 30, 2018
Intangible Assets [Line Items]        
Finite-Lived Intangible Assets, Gross $ 612,300,000 $ 612,300,000   $ 602,500,000
Finite-Lived Intangible Assets, Accumulated Amortization 269,000,000.0 269,000,000.0   242,800,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)     $ 4,600,000  
Intangible Assets, Gross (Excluding Goodwill) 740,100,000     730,100,000
Trade Names [Member]        
Intangible Assets [Line Items]        
Indefinite-lived Intangible Assets (Excluding Goodwill) 127,800,000 $ 127,800,000   127,600,000
After Tax [Member]        
Intangible Assets [Line Items]        
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)     $ 3,500,000  
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 200,000 $ 200,000   200,000
Finite-Lived Intangible Assets, Accumulated Amortization 200,000 200,000   200,000
Customer Relationships [Member]        
Intangible Assets [Line Items]        
Finite-Lived Intangible Assets, Gross 472,100,000 472,100,000   464,500,000
Finite-Lived Intangible Assets, Accumulated Amortization 165,800,000 165,800,000   148,400,000
Technology-Based Intangible Assets [Member]        
Intangible Assets [Line Items]        
Finite-Lived Intangible Assets, Gross 78,800,000 78,800,000   79,600,000
Finite-Lived Intangible Assets, Accumulated Amortization 49,000,000.0 49,000,000.0   45,100,000
Computer Software, Intangible Asset [Member]        
Intangible Assets [Line Items]        
Finite-Lived Intangible Assets, Gross 58,400,000 58,400,000   58,000,000.0
Finite-Lived Intangible Assets, Accumulated Amortization 51,200,000 51,200,000   48,900,000
Other Intangible Assets [Member]        
Intangible Assets [Line Items]        
Finite-Lived Intangible Assets, Gross 2,800,000 2,800,000   200,000
Finite-Lived Intangible Assets, Accumulated Amortization 2,800,000 2,800,000   $ 200,000
Burnaby Machine & Mill Equipment Ltd. [Member]        
Intangible Assets [Line Items]        
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 14,000,000 $ 14,000,000