Business Acquisitions, Goodwill and Acquired Intangible Assets (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 717.8	$ 546.3
Current year acquisitions	265.1	175.2
Impact of foreign currency changes	7.3	(3.7)
Goodwill, ending balance	990.2	717.8
Instrumentation [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	271.5	271.6
Current year acquisitions	188.5	0
Impact of foreign currency changes	2.6	(0.1)
Goodwill, ending balance	462.6	271.5
Digital Imaging [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	261.2	89.9
Current year acquisitions	62.4	175.2
Impact of foreign currency changes	3.5	(3.9)
Goodwill, ending balance	327.1	261.2
Aerospace and Defense Electronics [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	161.4	161.1
Current year acquisitions	14.2	0
Impact of foreign currency changes	0.8	0.3
Goodwill, ending balance	176.4	161.4
Engineered Systems [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	23.7	23.7
Current year acquisitions	0	0
Impact of foreign currency changes	0.4	0
Goodwill, ending balance	$ 24.1	$ 23.7