Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Reconciliation of Revenue from Segments to Consolidated (Detail)

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Segment Information - Reconciliation of Revenue from Segments to Consolidated (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total Net Sales $ 1,162.3 $ 1,306.2 $ 2,267.7 $ 2,568.8
United States [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total Net Sales 224.9 245.0 446.8 487.3
Mexico [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total Net Sales 129.2 148.6 252.8 291.3
South Korea [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total Net Sales 77.3 117.9 149.1 216.9
Others [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total Net Sales 494.2 624.6 1,018.1 1,267.4
Primary Reporting Segment [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total Net Sales 925.6 1,136.1 1,866.8 2,262.9
China [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total Net Sales $ 236.7 $ 170.1 $ 400.9 $ 305.9