Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangibles Goodwill (Details)

v3.10.0.1
Goodwill and Intangibles Goodwill (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Dec. 31, 2017
Goodwill [Roll Forward]      
Goodwill, Beginning Balance $ 425.3 $ 413.8  
Acquisitions 344.2 5.8  
Impairments 0.0 0.0  
Adjustments (1.1) 6.7  
Goodwill, Ending Balance 768.4 426.3  
Goodwill, Impaired, Accumulated Impairment Loss 0.0 0.0 $ 0.0
Marine Engine [Member]      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance 31.7 25.1  
Acquisitions 344.2 5.8  
Impairments 0.0 0.0  
Adjustments (0.5) 1.4  
Goodwill, Ending Balance 375.4 32.3  
Boat [Member]      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance 2.2 2.2  
Acquisitions 0.0 0.0  
Impairments 0.0 0.0  
Adjustments 0.0 0.0  
Goodwill, Ending Balance 2.2 2.2  
Fitness [Member]      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance 391.4 386.5  
Acquisitions 0.0 0.0  
Impairments 0.0 0.0  
Adjustments (0.6) 5.3  
Goodwill, Ending Balance $ 390.8 $ 391.8