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Business Combinations - Intangible Assets Acquired (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 15, 2018
Dec. 31, 2019
Dec. 31, 2018
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   13 years  
Customer relationships      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   14 years  
Unpatented technology      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   11 years  
Backlog      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   6 years  
AXC      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   11 years  
Finite lived intangible assets acquired   $ 201.4  
Total identifiable intangible assets acquired   256.4  
AXC | Trademarks and trade names      
Acquired Indefinite-lived Intangible Assets      
Indefinite lived assets, trademarks and trade names   $ 55.0  
AXC | Customer relationships      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   14 years  
Finite lived intangible assets acquired   $ 139.1  
AXC | Unpatented technology      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   10 years  
Finite lived intangible assets acquired   $ 42.1  
AXC | Backlog      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   1 year  
Finite lived intangible assets acquired   $ 19.2  
AXC | Other identifiable intangible assets      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life   4 years  
Finite lived intangible assets acquired   $ 1.0  
VRV      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life 9 years    
Finite lived intangible assets acquired $ 39.8    
Total identifiable intangible assets acquired 50.6 $ 50.6 $ 66.6
VRV | Trademarks and trade names      
Acquired Indefinite-lived Intangible Assets      
Indefinite lived assets, trademarks and trade names $ 10.8    
VRV | Customer relationships      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life 12 years    
Finite lived intangible assets acquired $ 16.3    
VRV | Unpatented technology      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life 12 years    
Finite lived intangible assets acquired $ 23.0    
VRV | Other identifiable intangible assets      
Acquired Finite-Lived Intangible Assets      
Weighted-average Estimated Useful Life 4 years    
Finite lived intangible assets acquired $ 0.5