Goodwill and Intangible Assets, Net (Identifiable Intangible Asset Balances) (Details) - USD ($) $ in Thousands	Jan. 03, 2016	Dec. 28, 2014
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Net amortizable intangible assets	$ 420,227	$ 419,681
Totals	490,811	490,265
Patents [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	39,911	39,953
Less: Accumulated amortization	(29,788)	(27,200)
Net amortizable intangible assets	10,123	12,753
Trade Names And Trademarks [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	40,249	40,069
Less: Accumulated amortization	(20,686)	(16,936)
Net amortizable intangible assets	19,563	23,133
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	58,969	59,631
Less: Accumulated amortization	(45,286)	(41,792)
Net amortizable intangible assets	13,683	17,839
Core Technology [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	307,242	298,491
Less: Accumulated amortization	(211,829)	(184,697)
Net amortizable intangible assets	95,413	113,794
Customer Relationships [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	391,566	402,185
Less: Accumulated amortization	(191,655)	(156,994)
Net amortizable intangible assets	199,911	245,191
In Process Research and Development [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	85,679	10,103
Less: Accumulated amortization	(4,145)	(3,132)
Net amortizable intangible assets	81,534	6,971
Human Health [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Net amortizable intangible assets	297,568	272,813
Totals	297,568	272,813
Human Health [Member] | Patents [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	37,111	37,153
Less: Accumulated amortization	(27,466)	(25,018)
Net amortizable intangible assets	9,645	12,135
Human Health [Member] | Trade Names And Trademarks [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	32,887	33,069
Less: Accumulated amortization	(19,810)	(16,878)
Net amortizable intangible assets	13,077	16,191
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	58,969	59,631
Less: Accumulated amortization	(45,286)	(41,792)
Net amortizable intangible assets	13,683	17,839
Human Health [Member] | Core Technology [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	181,807	171,163
Less: Accumulated amortization	(121,262)	(100,050)
Net amortizable intangible assets	60,545	71,113
Human Health [Member] | Customer Relationships [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	298,978	301,371
Less: Accumulated amortization	(177,730)	(149,917)
Net amortizable intangible assets	121,248	151,454
Human Health [Member] | In Process Research and Development [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	80,748	5,079
Less: Accumulated amortization	(1,378)	(998)
Net amortizable intangible assets	79,370	4,081
Environmental Health [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Net amortizable intangible assets	122,659	146,868
Totals	193,243	217,452
Environmental Health [Member] | Patents [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	2,800	2,800
Less: Accumulated amortization	(2,322)	(2,182)
Net amortizable intangible assets	478	618
Environmental Health [Member] | Trade Names And Trademarks [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	7,362	7,000
Less: Accumulated amortization	(876)	(58)
Net amortizable intangible assets	6,486	6,942
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	0
Less: Accumulated amortization	0	0
Net amortizable intangible assets	0	0
Environmental Health [Member] | Core Technology [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	125,435	127,328
Less: Accumulated amortization	(90,567)	(84,647)
Net amortizable intangible assets	34,868	42,681
Environmental Health [Member] | Customer Relationships [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	92,588	100,814
Less: Accumulated amortization	(13,925)	(7,077)
Net amortizable intangible assets	78,663	93,737
Environmental Health [Member] | In Process Research and Development [Member]
Finite and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross amortizable intangible assets	4,931	5,024
Less: Accumulated amortization	(2,767)	(2,134)
Net amortizable intangible assets	$ 2,164	$ 2,890