Danaher Separation And Disposition Of Communications Business Danaher Separation And Disposition Of Communications Business (Sales And Operating Profit) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 03, 2015	Jun. 27, 2014	Jul. 03, 2015	Jun. 27, 2014	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating profit	$ 931.1	$ 889.3	$ 1,705.3	$ 1,678.2
Communications business | Test & Measurement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition of communications business, sales	167.1	180.1	345.7	403.6	$ 760.0
Operating profit	$ (3.1)	$ 13.7	$ 16.0	$ 64.6