Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Goodwill (Details)

v3.21.2
Summary of Significant Accounting Policies - Goodwill (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2020
Changes in the carrying amount of goodwill            
Goodwill, Beginning Balance     $ 1,137.8 $ 470.7    
Acquisitions     19.6 716.4    
Divestiture       (77.9)    
Foreign currency adjustments     11.2 28.6    
Goodwill, Ending Balance $ 1,168.6   1,168.6 1,137.8 $ 470.7  
Goodwill and Intangible Asset Impairment [Abstract]            
Goodwill, impairment loss   $ 72.3        
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   10.2        
Total   82.5 11.2 144.8 0.0  
TerraSource Global            
Goodwill and Intangible Asset Impairment [Abstract]            
Goodwill, impairment loss 16.9          
Total   73.0        
Trade Names            
Goodwill            
Trade names, indefinite lives 226.6   226.6 226.8    
Goodwill and Intangible Asset Impairment [Abstract]            
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   8.6        
Technology, including patents            
Goodwill and Intangible Asset Impairment [Abstract]            
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   1.6        
Advanced Process Solutions            
Changes in the carrying amount of goodwill            
Goodwill, Beginning Balance     485.1 462.4    
Acquisitions     0.0 1.7    
Divestiture       0.0    
Foreign currency adjustments     (0.2) 21.0    
Goodwill, Ending Balance 484.9   484.9 485.1 462.4  
Reporting Unit, Goodwill           $ 95.2
Goodwill and Intangible Asset Impairment [Abstract]            
Goodwill, impairment loss   72.3        
Total   73.0        
Advanced Process Solutions | Trade Names            
Changes in the carrying amount of goodwill            
Reporting Unit, Indefinite-Lived Intangible Asset, Pre-Impairment Charge           4.4
Goodwill and Intangible Asset Impairment [Abstract]            
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   0.7        
Advanced Process Solutions | Technology, including patents            
Goodwill and Intangible Asset Impairment [Abstract]            
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   0.0        
Molding Technology Solutions            
Changes in the carrying amount of goodwill            
Goodwill, Beginning Balance     644.4 0.0    
Acquisitions     19.6 714.7    
Divestiture       (77.9)    
Foreign currency adjustments     11.4 7.6    
Goodwill, Ending Balance 675.4   675.4 644.4 0.0  
Reporting Unit, Indefinite-Lived Intangible Asset, Pre-Impairment Charge           $ 125.0
Goodwill and Intangible Asset Impairment [Abstract]            
Goodwill, impairment loss   0.0        
Total   9.5        
Molding Technology Solutions | Trade Names            
Goodwill and Intangible Asset Impairment [Abstract]            
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   7.9        
Molding Technology Solutions | Technology, including patents            
Goodwill and Intangible Asset Impairment [Abstract]            
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   $ 1.6        
Batesville            
Changes in the carrying amount of goodwill            
Goodwill, Beginning Balance     8.3 8.3    
Acquisitions     0.0 0.0    
Divestiture       0.0    
Foreign currency adjustments     0.0 0.0    
Goodwill, Ending Balance $ 8.3   $ 8.3 $ 8.3 $ 8.3