Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Intangible assets (Details)

v3.21.2
Summary of Significant Accounting Policies - Intangible assets (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Future amortization expense    
2017 $ 56.7  
2018 56.3  
2019 56.2  
2020 53.0  
2021 52.2  
Components of intangible assets and the related accumulated amortization    
Cost 1,004.7 $ 1,001.1
Accumulated amortization (317.5) (267.2)
Other Finite-Lived Intangible Assets, Gross $ 1,231.3 1,227.9
Minimum    
Components of intangible assets and the related accumulated amortization    
Intangible assets amortization period 3 years  
Maximum    
Components of intangible assets and the related accumulated amortization    
Intangible assets amortization period 21 years  
Trade Names    
Components of intangible assets and the related accumulated amortization    
Trade names, indefinite lives $ 226.6 226.8
Trade Names    
Components of intangible assets and the related accumulated amortization    
Cost 0.0 0.2
Accumulated amortization 0.0 (0.2)
Customer relationships    
Components of intangible assets and the related accumulated amortization    
Cost 798.8 787.6
Accumulated amortization (195.4) (151.8)
Technology, including patents    
Components of intangible assets and the related accumulated amortization    
Cost 137.6 137.6
Accumulated amortization (62.7) (51.0)
Software    
Components of intangible assets and the related accumulated amortization    
Cost 68.3 65.6
Accumulated amortization (59.4) (54.1)
Backlog    
Components of intangible assets and the related accumulated amortization    
Cost 0.0 10.0
Accumulated amortization 0.0 (10.0)
Other    
Components of intangible assets and the related accumulated amortization    
Cost 0.0 0.1
Accumulated amortization 0.0 $ (0.1)
Milacron    
Components of intangible assets and the related accumulated amortization    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 815.0