Business Combinations (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011	Jan. 01, 2012 years	Jul. 01, 2012 2021 Notes [Member]	Nov. 30, 2011 Human Health [Member] Caliper Life Sciences [Member]
Business Acquisition [Line Items]
Unsecured senior notes, face value						$ 500,000,000
Cash paid to the shareholders							646,317,000
Additional contingent consideration	24,300,000		24,300,000
Deferred revenue acquisition liability							7,825,000
Total transaction costs	$ 100,000	$ 1,100,000	$ 300,000	$ 4,000,000
Number of Years in Measurement Period from Acquisition Date to Change Underlying Assumptions					1