Goodwill and Other Intangible Assets - Acquisition Information (Details) (ASPEX Corporation [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Jan. 09, 2012
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Acquisition purchase price		$ 30.5
Acquisition related transaction costs	0.2
Net tangible assets acquired, fair value		1.9
Net intangible assets acquired, fair value		9.7
Tax deductible goodwill		1.3
Revenue	2.8
Net loss	(0.1)
Developed technology [Member]
Business Acquisition [Line Items]
Net intangible assets acquired, fair value		6.4
Net intangible assets acquired, weighted average amortization period	7.0
Customer relationships [Member]
Business Acquisition [Line Items]
Net intangible assets acquired, fair value		1.7
Net intangible assets acquired, weighted average amortization period	5.0
Materials Science [Member]
Business Acquisition [Line Items]
Acquisition related goodwill, adjusted for deferred tax liabilities		$ 22.0