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Goodwill and Other Intangible Assets, net - Other Intangibles and Amortization (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Other intangible assets    
Accumulated Amortization $ (433.4) $ (336.0)
Other intangible assets, net    
Other intangible assets, Acquired Cost 1,401.1 1,401.0
Other intangible assets, net 967.7 1,065.0
Estimated amortization expense    
2019 98.2  
2020 95.0  
2021 87.4  
2022 73.4  
2023 68.0  
Thereafter $ 302.6  
Useful life of finite lived intangible assets 9 years 2 months 12 days  
Trade names    
Assets not subject to amortization:    
Indefinite-lived intangible assets $ 243.1 244.1
Customer relationships    
Other intangible assets    
Acquired Cost 843.8 844.8
Accumulated Amortization (287.7) (230.8)
Net Book Value $ 556.1 614.0
Estimated amortization expense    
Useful life of finite lived intangible assets 10 years  
Technology and intellectual property    
Other intangible assets    
Acquired Cost $ 268.8 272.0
Accumulated Amortization (129.3) (95.6)
Net Book Value $ 139.5 176.4
Intellectual Property    
Estimated amortization expense    
Useful life of finite lived intangible assets 6 years 4 months 24 days  
Other intangibles    
Other intangible assets    
Acquired Cost $ 45.4 40.1
Accumulated Amortization (16.4) (9.6)
Net Book Value $ 29.0 $ 30.5
Estimated amortization expense    
Useful life of finite lived intangible assets 8 years 6 months