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Summary of Changes in Carrying Amount of Goodwill (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Goodwill [Line Items]    
Ending balance $ 757.2 $ 746.5
Seating
   
Goodwill [Line Items]    
Beginning balance 746.5 628.6
Acquisition   113.9
Foreign currency translation and other 10.7 4.0
Ending balance $ 757.2 $ 746.5