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Stock Transactions And Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 0 Months Ended 3 Months Ended
Apr. 03, 2015
Apr. 03, 2015
Mar. 28, 2014
Jul. 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock repurchase program, authorized shares to be repurchased       20,000,000us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Stock repurchase program, remaining number of shares authorized to be repurchased 20,000,000us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased 20,000,000us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased    
Common shares reserved for issuance under the 2007 Stock Incentive Plan (shares) 24,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance 24,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance    
Total number of shares withheld sufficient to fund minimum tax withholding requirements related to the vesting of restricted stock units (shares) 261,000dhr_TotalNumberOfSharesWithheldSufficientToFundMinimumTaxWithholdingRequirementsRelatedToExercisingOfStockOptionsAndVestingOfRSUs      
Total value of shares withheld sufficient to fund minimum tax withholding requirements related to the vesting of restricted stock units $ 23dhr_TotalValueOfSharesWithheldSufficientToFundMinimumTaxWithholdingRequirementsRelatedToExercisingOfStockOptionsAndVestingOfRSUs      
PSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 3 years      
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total unrecognized compensation cost 166us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
166us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
   
Weighted average period for cost to be recognized   3 years    
Tax benefit realized related to exercise of stock options 19us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
     
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total unrecognized compensation cost 138us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
138us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Weighted average period for cost to be recognized   3 years    
Aggregate intrinsic value of options exercised 84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
  33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Cash receipts due to exercise of options 55us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
  26us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Tax benefit realized related to exercise of stock options $ 26us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember