Goodwill and Intangible Assets, Net (Narrative) (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012	Dec. 30, 2012	Dec. 29, 2013	Sep. 28, 2014	Jan. 01, 2014
Goodwill and Intangible Assets Net [Line Items]
Reallocation of Goodwill Resulting from Realignment Within Operating Segments						$ 220,300,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	90.00%						11.00%
Goodwill							796,300,000
Change in any one of the input assumptions for the various reporting units	10.00%
Impairment of Intangible Assets (Excluding Goodwill)	0
Total amortization expense related to finite-lived intangible assets	83,400,000	89,300,000	90,100,000
Future Amortization Expense, Year One	80,400,000
Future Amortization Expense, Year Two	71,400,000
Future Amortization Expense, Year Three	61,900,000
Future Amortization Expense, Year Four	48,700,000
Future Amortization Expense, Year Five	37,200,000
Finite-Lived Intangible Assets, Net	419,681,000	389,846,000			389,846,000
Asset impairment	0	158,000	74,153,000
Minimum [Member]
Goodwill and Intangible Assets Net [Line Items]
Long-term terminal growth rates for reporting units	3.00%
Discount rates for reporting units	10.00%
Maximum [Member]
Goodwill and Intangible Assets Net [Line Items]
Long-term terminal growth rates for reporting units	6.00%
Discount rates for reporting units	11.50%
Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Remaining Fair Value After Impairment for Finite and Indefinite Lived Intangible Assets			6,100,000	6,100,000
Impairment of Intangible Assets (Excluding Goodwill)				74,200,000
Finite-Lived Intangible Assets, Net	23,133,000	19,601,000			19,601,000
Asset impairment			2,300,000
Trade Names And Trademarks [Member] | Minimum [Member]
Goodwill and Intangible Assets Net [Line Items]
Remaining Useful Life After Impairment for Finite and Indefinite Lived Intangible Assets			1 year
Trade Names And Trademarks [Member] | Maximum [Member]
Goodwill and Intangible Assets Net [Line Items]
Remaining Useful Life After Impairment for Finite and Indefinite Lived Intangible Assets			8 years
Trade Names And Trademarks [Member] | Weighted Average [Member]
Goodwill and Intangible Assets Net [Line Items]
Remaining Useful Life After Impairment for Finite and Indefinite Lived Intangible Assets				3 years
Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	17,839,000	26,250,000			26,250,000
Human Health [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	265,092,000	339,711,000			339,711,000
Human Health [Member] | Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)				73,400,000
Finite-Lived Intangible Assets, Net	16,191,000	19,601,000			19,601,000
Human Health [Member] | Customer Lists [Member]
Goodwill and Intangible Assets Net [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		200,000
Asset impairment					200,000
Human Health [Member] | Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	17,839,000	25,745,000			25,745,000
Environmental Health [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	154,589,000	50,135,000			50,135,000
Environmental Health [Member] | Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)				700,000
Finite-Lived Intangible Assets, Net	6,942,000	0			0
Environmental Health [Member] | Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	0	505,000			505,000
Other Asset Acquisitions [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net		7,000,000	6,800,000	6,800,000	7,000,000
Prepaid Royalties		40,300,000	25,000,000	25,000,000	40,300,000
Prepaid Royalties To Be Paid Within One Year	$ 10,000,000