Acquisitions Purchase Price (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Mar. 31, 2016	Apr. 02, 2016	Mar. 28, 2015	Dec. 31, 2015
Purchase Price
Cash paid		$ 1,109.4	$ 298.7
Debt Assumed		254.8
Purchase Price Payable		60.1
Cash acquired		(77.7)
Total Purchase Price		1,346.6
Net Assets Acquired [Abstract]
Current assets		162.4
Property, plant and equipment		20.2
Goodwill		711.5
Other assets		9.2
Liabilities assumed		(244.7)
Total Purchase Price		$ 1,346.6
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (in years)		12 years
Other Information
Purchase Price Paid For Acquisitions Completed In A Prior Year		$ 1.0
In-Process Research and Development [Member]
Net Assets Acquired [Abstract]
Indefinite-lived intangible assets		10.7
Customer Relationships [Member]
Net Assets Acquired [Abstract]
Definite-lived intangible assets		$ 386.1
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (in years)		15 years
Product Technology [Member]
Net Assets Acquired [Abstract]
Definite-lived intangible assets		$ 250.2
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (in years)		9 years
Tradenames and other [Member]
Net Assets Acquired [Abstract]
Definite-lived intangible assets		$ 41.0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (in years)		9 years
Affymetrix, Inc. [Member]
Purchase Price
Cash paid	$ 1,105.8
Debt Assumed	254.2
Purchase Price Payable	59.5
Cash acquired	(77.7)
Total Purchase Price	1,341.8
Net Assets Acquired [Abstract]
Current assets	161.3
Property, plant and equipment	20.2
Goodwill	708.6
Other assets	9.1
Liabilities assumed	(242.9)
Total Purchase Price	1,341.8
Other Information
Revenue Reported by Acquired Entity				$ 360.0
Goodwill, Expected Tax Deductible Amount	0.0
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deferred Tax Liabilities	151.0
Affymetrix, Inc. [Member] | In-Process Research and Development [Member]
Net Assets Acquired [Abstract]
Indefinite-lived intangible assets	10.7
Affymetrix, Inc. [Member] | Customer Relationships [Member]
Net Assets Acquired [Abstract]
Definite-lived intangible assets	384.3
Affymetrix, Inc. [Member] | Product Technology [Member]
Net Assets Acquired [Abstract]
Definite-lived intangible assets	249.5
Affymetrix, Inc. [Member] | Tradenames and other [Member]
Net Assets Acquired [Abstract]
Definite-lived intangible assets	$ 41.0
Other [Member]
Purchase Price
Cash paid		$ 3.6
Debt Assumed		0.6
Purchase Price Payable		0.6
Total Purchase Price		4.8
Net Assets Acquired [Abstract]
Current assets		1.1
Goodwill		2.9
Other assets		0.1
Liabilities assumed		(1.8)
Total Purchase Price		4.8
Other [Member] | Customer Relationships [Member]
Net Assets Acquired [Abstract]
Definite-lived intangible assets		1.8
Other [Member] | Product Technology [Member]
Net Assets Acquired [Abstract]
Definite-lived intangible assets		$ 0.7