Goodwill and Intangible Assets, Net (Identifiable Intangible Asset Balances) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Net amortizable intangible assets	$ 419,681	$ 389,846
Totals	490,265	460,430
Patents [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	39,953	39,591
Less: Accumulated amortization	(27,200)	(24,207)
Net amortizable intangible assets	12,753	15,384
Trade Names And Trademarks [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	40,069	35,809
Less: Accumulated amortization	(16,936)	(16,208)
Net amortizable intangible assets	23,133	19,601
Non-amortizing intangible assets	70,584	70,584
Licenses [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	59,631	79,180
Less: Accumulated amortization	(41,792)	(52,930)
Net amortizable intangible assets	17,839	26,250
Core Technology [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	298,491	302,070
Less: Accumulated amortization	(184,697)	(169,326)
Net amortizable intangible assets	113,794	132,744
Customer Relationships [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	402,185	321,395
Less: Accumulated amortization	(156,994)	(132,833)
Net amortizable intangible assets	245,191	188,562
In Process Research and Development [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	10,103	9,483
Less: Accumulated amortization	(3,132)	(2,178)
Net amortizable intangible assets	6,971	7,305
Human Health [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Net amortizable intangible assets	265,092	339,711
Totals	265,092	339,711
Human Health [Member] | Patents [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	36,760	36,791
Less: Accumulated amortization	(24,652)	(22,205)
Net amortizable intangible assets	12,108	14,586
Human Health [Member] | Trade Names And Trademarks [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	33,069	35,723
Less: Accumulated amortization	(16,878)	(16,122)
Net amortizable intangible assets	16,191	19,601
Non-amortizing intangible assets	0	0
Human Health [Member] | Licenses [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	59,631	71,580
Less: Accumulated amortization	(41,792)	(45,835)
Net amortizable intangible assets	17,839	25,745
Human Health [Member] | Core Technology [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	169,864	187,387
Less: Accumulated amortization	(98,798)	(88,811)
Net amortizable intangible assets	71,066	98,576
Human Health [Member] | Customer Relationships [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	292,627	305,038
Less: Accumulated amortization	(148,820)	(127,397)
Net amortizable intangible assets	143,807	177,641
Human Health [Member] | In Process Research and Development [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	5,079	4,257
Less: Accumulated amortization	(998)	(695)
Net amortizable intangible assets	4,081	3,562
Environmental Health [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Net amortizable intangible assets	154,589	50,135
Totals	225,173	120,719
Environmental Health [Member] | Patents [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	3,193	2,800
Less: Accumulated amortization	(2,548)	(2,002)
Net amortizable intangible assets	645	798
Environmental Health [Member] | Trade Names And Trademarks [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	7,000	86
Less: Accumulated amortization	(58)	(86)
Net amortizable intangible assets	6,942	0
Non-amortizing intangible assets	70,584	70,584
Environmental Health [Member] | Licenses [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	0	7,600
Less: Accumulated amortization	0	(7,095)
Net amortizable intangible assets	0	505
Environmental Health [Member] | Core Technology [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	128,627	114,683
Less: Accumulated amortization	(85,899)	(80,515)
Net amortizable intangible assets	42,728	34,168
Environmental Health [Member] | Customer Relationships [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	109,558	16,357
Less: Accumulated amortization	(8,174)	(5,436)
Net amortizable intangible assets	101,384	10,921
Environmental Health [Member] | In Process Research and Development [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	5,024	5,226
Less: Accumulated amortization	(2,134)	(1,483)
Net amortizable intangible assets	$ 2,890	$ 3,743