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Summary of Significant Accounting Policies - Additional information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Segment
Dec. 31, 2012
Dec. 31, 2011
Significant Accounting Policies [Line Items]      
Allowance for doubtful accounts $ 34.5 $ 35.4  
Reserve of inventory 98.8 89.8  
Capitalized pre-production E&D costs 202.1 201.5  
Capitalized pre-production tooling costs related to customer-owned tools 233.1 164.7  
Cash collected related to E&D and tooling costs 423.9 346.8  
Depreciation expense 251.1 206.6 218.3
Fixed asset impairment charges 11.1 6.5 2.2
New product development costs 108.4 104.3 110.7
Defined benefit plan adjustments reclassified from accumulated other comprehensive loss 15.4 5.4 17.7
Derivative instruments and hedging activities reclassified from accumulated other comprehensive loss (32.2) 3.2 12.6
Reportable operating segments 2    
Maximum
      
Significant Accounting Policies [Line Items]      
Cash equivalents maturity period 90 days    
Corporate and regional headquarters and elimination of intercompany activity ("Other")
      
Significant Accounting Policies [Line Items]      
Fixed asset impairment charges 1.9 0.5 1.2
Restructuring Charges
      
Significant Accounting Policies [Line Items]      
Fixed asset impairment charges $ 9.2 $ 6.0 $ 1.0