Goodwill and Intangible Assets, Net (Changes in the Carrying Amount of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013
Changes in the carrying amount of goodwill
Balance at beginning of period	$ 2,122,788
Foreign currency translation	7,625
Acquisitions, earn outs and other	638
Balance at end of period	2,131,051
Human Health [Member]
Changes in the carrying amount of goodwill
Balance at beginning of period	1,632,487
Foreign currency translation	7,069
Acquisitions, earn outs and other	0
Balance at end of period	1,639,556
Environmental Health [Member]
Changes in the carrying amount of goodwill
Balance at beginning of period	490,301
Foreign currency translation	556
Acquisitions, earn outs and other	638
Balance at end of period	$ 491,495