Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Intangible assets (Details)

v3.20.2
Summary of Significant Accounting Policies - Intangible assets (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Sep. 30, 2020
Sep. 30, 2019
Future amortization expense      
2017   $ 57.2  
2018   56.1  
2019   55.6  
2020   55.5  
2021   52.6  
Components of intangible assets and the related accumulated amortization      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 10.2 10.2  
Cost   1,001.1 $ 397.3
Accumulated amortization   (267.2) (196.2)
Other Finite-Lived Intangible Assets, Gross   1,227.9 508.3
Cimcool      
Components of intangible assets and the related accumulated amortization      
Intangible Assets Excluding Goodwill, Written off Related to Sale of Business Unit   $ 122.1  
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      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 8.6    
Trade names, indefinite lives   $ 226.8 111.0
Trade Names      
Components of intangible assets and the related accumulated amortization      
Cost   0.2 0.2
Accumulated amortization   (0.2) (0.2)
Customer relationships      
Components of intangible assets and the related accumulated amortization      
Cost   787.6 287.7
Accumulated amortization   (151.8) (109.3)
Technology, including patents      
Components of intangible assets and the related accumulated amortization      
Cost   137.6 56.1
Accumulated amortization   (51.0) (38.7)
Software      
Components of intangible assets and the related accumulated amortization      
Cost   65.6 53.1
Accumulated amortization   (54.1) (47.8)
Backlog      
Components of intangible assets and the related accumulated amortization      
Cost   10.0 0.0
Accumulated amortization   (10.0) 0.0
Other      
Components of intangible assets and the related accumulated amortization      
Cost   0.1 0.2
Accumulated amortization   (0.1) $ (0.2)
Burnaby Machine & Mill Equipment      
Components of intangible assets and the related accumulated amortization      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   14.0  
Burnaby Machine & Mill Equipment | Trade Names      
Components of intangible assets and the related accumulated amortization      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   1.0  
Burnaby Machine & Mill Equipment | Customer relationships      
Components of intangible assets and the related accumulated amortization      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   10.0  
Burnaby Machine & Mill Equipment | Backlog      
Components of intangible assets and the related accumulated amortization      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   3.0  
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