Summary of Significant Accounting Policies (Details 4)	12 Months Ended
	Dec. 31, 2012 Y
Purchased technology
Other intangible assets
Estimated useful life, minimum (in years)	4
Estimated useful life, maximum (in years)	6
Customer relationships
Other intangible assets
Estimated useful life, minimum (in years)	4
Estimated useful life, maximum (in years)	8
Other intangibles
Other intangible assets
Estimated useful life, minimum (in years)	3
Estimated useful life, maximum (in years)	7