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 9 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Sep. 30, 2017
Schedule of Intangible Assets [Line Items]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 4.6    
Finite-Lived Intangible Assets, Gross 603.1 $ 603.1 $ 598.1
Finite-Lived Intangible Assets, Accumulated Amortization 234.9 234.9 207.6
Indefinite and Finite Lived Intangible Assets, Gross 731.0   731.5
Trade Names [Member]      
Schedule of Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 0.2 0.2 0.2
Finite-Lived Intangible Assets, Accumulated Amortization 0.1 0.1 0.1
Customer Relationships [Member]      
Schedule of Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 465.2 465.2 468.7
Finite-Lived Intangible Assets, Accumulated Amortization 142.7 142.7 125.9
Technology-Based Intangible Assets [Member]      
Schedule of Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 79.9 79.9 80.7
Finite-Lived Intangible Assets, Accumulated Amortization 43.9 43.9 39.9
Computer Software, Intangible Asset [Member]      
Schedule of Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 57.6 57.6 48.3
Finite-Lived Intangible Assets, Accumulated Amortization 48.0 48.0 41.5
Other Intangible Assets [Member]      
Schedule of Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 0.2 0.2 0.2
Finite-Lived Intangible Assets, Accumulated Amortization 0.2 0.2 0.2
After Tax [Member]      
Schedule of Intangible Assets [Line Items]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 3.5    
Trade Names [Member]      
Schedule of Intangible Assets [Line Items]      
Indefinite-Lived Intangible Assets (Excluding Goodwill) 127.9 127.9 $ 133.4
Customer Concentration Risk [Member] | Trade Names [Member]      
Schedule of Intangible Assets [Line Items]      
Indefinite-Lived Intangible Assets (Excluding Goodwill) $ 4.0 $ 4.0  
Minimum      
Schedule of Intangible Assets [Line Items]      
Finite-Lived Intangible Asset, Useful Life   3 years  
Maximum      
Schedule of Intangible Assets [Line Items]      
Finite-Lived Intangible Asset, Useful Life   21 years