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Goodwill (Detail)
$ in Millions
 6 Months Ended
Jul. 01, 2017
USD ($)
Goodwill [Roll Forward]  
Balance at January 1, 2017 $ 1,121.3
Acquisition 121.1
Foreign currency translation and other 29.7
Balance at July 1, 2017 1,272.1 [1]
Operating segments | Seating  
Goodwill [Roll Forward]  
Balance at January 1, 2017 1,091.2
Acquisition 121.1
Foreign currency translation and other 29.5
Balance at July 1, 2017 1,241.8
Operating segments | E-Systems  
Goodwill [Roll Forward]  
Balance at January 1, 2017 30.1
Acquisition 0.0
Foreign currency translation and other 0.2
Balance at July 1, 2017 $ 30.3
[1] Unaudited.