Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill - Intangible Assets (Details)

v3.21.2
Intangible Assets and Goodwill - Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2021
Sep. 30, 2020
Intangible Assets [Line Items]    
Cost $ 1,008.2 $ 1,001.1
Accumulated Amortization (304.8) (267.2)
Total 1,236.0 1,227.9
Trade names    
Intangible Assets [Line Items]    
Indefinite-lived assets: 227.8 226.8
Trade names    
Intangible Assets [Line Items]    
Cost 0.2 0.2
Accumulated Amortization (0.2) (0.2)
Customer relationships    
Intangible Assets [Line Items]    
Cost 803.4 787.6
Accumulated Amortization (186.1) (151.8)
Technology, including patents    
Intangible Assets [Line Items]    
Cost 138.4 137.6
Accumulated Amortization (60.4) (51.0)
Software    
Intangible Assets [Line Items]    
Cost 66.2 65.6
Accumulated Amortization (58.1) (54.1)
Backlog    
Intangible Assets [Line Items]    
Cost 0.0 10.0
Accumulated Amortization 0.0 (10.0)
Other    
Intangible Assets [Line Items]    
Cost 0.0 0.1
Accumulated Amortization $ 0.0 $ (0.1)