Danaher Separation And Disposition Of Communications Business (Narrative) (Details) shares in Millions, $ in Millions			3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 14, 2015 shares	May. 13, 2015	Jul. 03, 2015 USD ($)	Jun. 27, 2014 USD ($)	Jul. 03, 2015 USD ($)	Jun. 27, 2014 USD ($)	Dec. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Separation, number of independent publicly traded companies		2
Separation, revenues of New Danaher							$ 16,500.0
Separation, revenues of NewCo							6,000.0
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
Subsequent event | Communications business | Test & Measurement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition of communications business, number of Danaher shares tendered | shares	26.0
Disposition of communications business, aggregate consideration number of Netscout shares received | shares	62.5
Disposition of communications business, percentage of investment ownership	60.00%