Goodwill And Intangible Assets (Gross Carrying Amount And Accumulated Amortization Of Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 258.6	$ 280.9
Accumulated Amortization	(201.5)	(184.2)
Intangible assets, Net	57.1	96.7
Restructuring and other charges	20.3	9.5	11.7
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	212.8	215.6
Accumulated Amortization	(169.1)	(161.4)
Intangible assets, Net	43.7	54.2
Customer Relationships/Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	35.2	35.2
Accumulated Amortization	(23.7)	(18.6)
Intangible assets, Net	11.5	16.6
Trade Names/Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	0.2	0.2
Accumulated Amortization	(0.2)	(0.2)
Leasehold Improvements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	(2.7)	(3.2)
Accumulated Amortization	2.3	2.0
Intangible assets, Net	(0.4)	(1.2)
Restructuring and other charges	0.5
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets	13.1	13.1
Accumulated Amortization	(10.8)	(6.0)
Intangible assets, Net	2.3	7.1
IPR&D [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Assets		20.0
Intangible assets, Net		$ 20.0