Business Combinations (Schedule Of Preliminary Purchase Price Allocation) (Details) (USD $)					12 Months Ended		0 Months Ended			12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 30, 2011	Jul. 08, 2011	Dec. 31, 2010	Jan. 01, 2010	Dec. 30, 2011 Developed Product Technology [Member]	Dec. 30, 2011 Customer Relationships [Member]	Jul. 08, 2011 Tekla Corporation [Member]		Dec. 30, 2011 Tekla Corporation [Member]	Dec. 30, 2011 Tekla Corporation [Member] Developed Product Technology [Member]	Jul. 08, 2011 Tekla Corporation [Member] Developed Product Technology [Member]	Jul. 08, 2011 Tekla Corporation [Member] In-Process Research And Development [Member]	Dec. 30, 2011 Tekla Corporation [Member] Order Backlog [Member] years	Jul. 08, 2011 Tekla Corporation [Member] Order Backlog [Member]	Dec. 30, 2011 Tekla Corporation [Member] Customer Relationships [Member]	Jul. 08, 2011 Tekla Corporation [Member] Customer Relationships [Member]	Dec. 30, 2011 Tekla Corporation [Member] Trade Name [Member]	Jul. 08, 2011 Tekla Corporation [Member] Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of total purchase consideration	$ 797,801,000		$ 133,415,000	$ 41,639,000			$ 457,387,000	[1]	$ 457,387,000
Net tangible assets acquired		10,976,000					10,976,000
Intangible assets acquired	374,928,000		57,802,000	21,475,000			207,674,000		207,674,000		107,260,000	7,591,000		1,246,000		83,929,000		7,648,000
Deferred tax liability	(148,617,000)		(79,933,000)				(53,995,000)
Less fair value of all assets/liabilities acquired							164,655,000
Goodwill	496,082,000		65,741,000	26,743,000			292,732,000		292,732,000
Estimated useful Life, in years					6	7				7					8		8
Estimated useful Life, in months													6
Acquisition, cash paid	$ 1,200,000	$ 454,900,000							$ 2,500,000
Percentage of shares yet acquired									0.54%
Business acquisition, percentage of shares acquired		99.46%					99.46%

[1] Of the $457.4 million, $2.5 million was held in a cash account at the end of fiscal 2011 and represents the 0.54% of shares that were not yet acquired by the Company. In February, 2012 the Company purchased the remaining shares at the same per share price as was provided for the original 99.46% of shares obtained. Therefore, the non-controlling interest was valued based on that per-share price.