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Goodwill and Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 28, 2018
Jun. 29, 2018
Sep. 29, 2017
Sep. 28, 2018
Sep. 29, 2017
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]            
Goodwill impairment   $ 3.3   $ 3.3    
Amortization of acquisition-related intangible assets $ 28.0   $ 37.3 83.3 $ 95.0  
Intangible assets, net 595.9     595.9   $ 628.3
IPRD            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets, net $ 45.1     $ 45.1   $ 35.5