Segment, Customer and Geographic Information - Customer Accounted Revenues (Detail) (Sales [Member])	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	10.00%	10.00%	10.00%	10.00%
Europe, Middle East, & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	11.00%	11.00%	10.00%	13.00%
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	10.00%	10.00%	10.00%	9.00%
Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	8.00%	6.00%	6.00%	7.00%
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	29.00%	27.00%	26.00%	29.00%