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Goodwill (Tables)
9 Months Ended
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Changes in Carrying Amount of Goodwill
A summary of the changes in the carrying amount of goodwill, by operating segment, in the nine months ended September 30, 2017, is shown below (in millions):
 
Seating
 
E-Systems
 
Total
Balance at January 1, 2017
$
1,091.2

 
$
30.1

 
$
1,121.3

Acquisition
122.6

 

 
122.6

Consolidation of affiliate

 
94.1

 
94.1

Foreign currency translation and other
48.9

 
0.2

 
49.1

Balance at September 30, 2017
$
1,262.7

 
$
124.4

 
$
1,387.1