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IDEXX Retirement And Incentive Savings Plan (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
401(k) Plan [Member] |  |  |
Retirement And Incentive Savings Plan [Line Items] |  |  |
Employer contributions | $ 8.8 us-gaap_DefinedContributionPlanCostRecognized / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_FourZeroOneKPlanMember | $ 7.8 us-gaap_DefinedContributionPlanCostRecognized / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_FourZeroOneKPlanMember | $ 7.1 us-gaap_DefinedContributionPlanCostRecognized / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_FourZeroOneKPlanMember
Discretionary contributions | 0 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_FourZeroOneKPlanMember | 0 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_FourZeroOneKPlanMember | 0 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_FourZeroOneKPlanMember
European And Canadian Based Defined Contribution Plan [Member] |  |  |
Retirement And Incentive Savings Plan [Line Items] |  |  |
Employer contributions | $ 3.7 us-gaap_DefinedContributionPlanCostRecognized / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_EuropeanAndCanadianBasedDefinedContributionPlanMember | $ 3.1 us-gaap_DefinedContributionPlanCostRecognized / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_EuropeanAndCanadianBasedDefinedContributionPlanMember | $ 2.8 us-gaap_DefinedContributionPlanCostRecognized / idxx_RetirementAndIncentiveSavingsPlanAxis = idxx_EuropeanAndCanadianBasedDefinedContributionPlanMember

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Namespace Prefix: | idxx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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Data Type: | na
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- Details
Name: | idxx_RetirementAndIncentiveSavingsPlanAxis=idxx_FourZeroOneKPlanMember
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Data Type: | na
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