Business Acquisitions, Goodwill and Acquired Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 28, 2014	Dec. 29, 2013
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,037.8us-gaap_Goodwill	$ 990.2us-gaap_Goodwill
Current year acquisitions	142.8us-gaap_GoodwillAcquiredDuringPeriod	62.5us-gaap_GoodwillAcquiredDuringPeriod
Foreign currency changes and other	(30.0)us-gaap_GoodwillTranslationAdjustments	(14.9)us-gaap_GoodwillTranslationAdjustments
Goodwill, ending balance	1,150.6us-gaap_Goodwill	1,037.8us-gaap_Goodwill
Instrumentation
Goodwill [Roll Forward]
Goodwill, beginning balance	549.5	493.8
Current year acquisitions	142.8	58.1
Foreign currency changes and other	(12.2)	(2.4)
Goodwill, ending balance	680.1	549.5
Digital Imaging
Goodwill [Roll Forward]
Goodwill, beginning balance	318.5	327.1
Current year acquisitions	0	4.4
Foreign currency changes and other	(16.3)	(13.0)
Goodwill, ending balance	302.2	318.5
Aerospace and Defense Electronics
Goodwill [Roll Forward]
Goodwill, beginning balance	145.6	145.2
Current year acquisitions	0	0
Foreign currency changes and other	(1.1)	0.4
Goodwill, ending balance	144.5	145.6
Engineered Systems
Goodwill [Roll Forward]
Goodwill, beginning balance	24.2	24.1
Current year acquisitions	0	0
Foreign currency changes and other	(0.4)	0.1
Goodwill, ending balance	$ 23.8	$ 24.2

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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