Goodwill and Intangible Assets (Weighted Average Amortization Period by Intangible Asset Class) (Detail)	12 Months Ended
	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life	4 years 10 months 24 days
Trademarks and patents
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life	3 years 8 months 12 days
Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life	4 years 1 month 6 days
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life	5 years 6 months