Consolidated Condensed Statement Of Stockholders' Equity Consolidated Condensed Statement Of Stockholders' Equity (Parenthetical) $ in Millions	9 Months Ended
Sep. 28, 2018 USD ($)
Statement of Stockholders' Equity [Abstract]
Debt conversion, converted instrument, tax benefit	$ 4.2

Debt Conversion, Converted Instrument, Tax Benefit (Expense)

No definition available.

Name:	dhr_DebtConversionConvertedInstrumentTaxBenefitExpense
Namespace Prefix:	dhr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration