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Pay vs Performance Disclosure
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Pay vs Performance Disclosure [Table]      
Pay vs Performance [Table Text Block]
Year (1)Summary Compensation Table Total for CEOCompensation Actually Paid to CEO
(2)(4)		Average Summary Compensation Table Total for Other NEOsAverage Compensation Actually Paid to Other NEOs
(3)(4)		Value of Initial Fixed $100 Investment Based on: IDEXX Net Income ($MM)IDEXX Organic Revenue Growth
(7)
IDEXX TSR
(5)		Peer Group TSR
(6)
2022$9,788,388 $(13,754,140)$2,782,492 $(3,411,052)$156.23 $140.29 $679.1 7 %
2021$9,065,021 $28,210,038 $2,848,443 $8,009,991 $252.16 $143.09 $744.8 16 %
2020$7,038,175 $34,873,879 $2,311,502 $10,522,557 $191.43 $113.45 $581.8 12 %
    
Company Selected Measure Name organic revenue growth    
Named Executive Officers, Footnote [Text Block] For each of the years presented in the table, our CEO was Jonathan J. Mazelsky. Our other NEOs were Brian P. McKeon (2020-2022), James F. Polewaczyk (2020-2022), Michael J. Lane (2020-2022), Tina Hunt (2021-2022), and Sharon E. Underberg (2020).    
Peer Group Issuers, Footnote [Text Block] The peer group TSR set forth in the table utilizes the S&P 500 Health Care Index, which we also utilize in the stock performance graph required by Item 201(e) of Regulation S-K included in our Annual Report on Form 10-K for the year ended December 31, 2022. The measurement period to calculate the S&P 500 Health Care Index TSR beings as of market close on December 31, 2019 and ends on December 31, 2020, 2021 and 2022, as applicable. The calculation of the S&P 500 Health Care Index TSR assumes an investment of $100 in the S&P 500 Health Care Index as of the close of trading on December 31, 2019, and assumes dividends, if any, were reinvested.    
PEO Total Compensation Amount $ 9,788,388 $ 9,065,021 $ 7,038,175
PEO Actually Paid Compensation Amount $ (13,754,140) 28,210,038 34,873,879
Adjustment To PEO Compensation, Footnote [Text Block] The table below provides a summary of deductions and additions made from the summary compensation table (SCT) total for our CEO to calculate the “compensation actually paid” to our CEO. The amount has been calculated in accordance with Item 402(v) of Regulation S-K and the dollar amount of the “compensation actually paid” does not reflect the actual amount of compensation earned or paid to the CEO during the applicable year. There were no equity award forfeitures nor dividends or other earnings paid on stock or option awards in any of the applicable years and thus no adjustments are reflected for such events in the table below.
Year202220212020
Summary Compensation Table for CEO$9,788,388 $9,065,021 $7,038,175 
DeductionsGrant date value of Stock Awards granted during fiscal year as reported in the SCT 1,937,696 1,500,029 1,125,087 
Grant Date value of Option Awards granted during fiscal year as reported in the SCT 5,812,593 4,499,229 3,375,000 
AdditionsFair value as of year end of outstanding and unvested equity awards granted during fiscal year 6,449,518 8,858,781 11,773,116 
Change in fair value (comparing year end to the end of prior fiscal year) of equity awards granted in a prior fiscal year that are outstanding and unvested at year end (15,299,044)13,640,628 18,767,155 
Fair value of equity awards on vest date for equity awards granted and vested during fiscal year — — — 
Change in fair value (comparing the vesting date to the end of the prior fiscal year) of equity awards granted in a prior fiscal year that vested during the fiscal year (6,942,713)2,644,866 1,795,521 
Compensation Actually Paid to CEO$(13,754,140)$28,210,038 $34,873,879 
    
Non-PEO NEO Average Total Compensation Amount $ 2,782,492 2,848,443 2,311,502
Non-PEO NEO Average Compensation Actually Paid Amount $ (3,411,052) 8,009,991 10,522,557
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] The table below provides a summary of deductions and additions made from the average summary compensation table (SCT) total for our other NEOs to calculate the average “compensation actually paid” to our other NEOs. The amount has been calculated in accordance with Item 402(v) of Regulation S-K and the dollar amount of the average “compensation actually paid” does not reflect the actual average amount of compensation earned or paid to the other NEOs during the applicable year. There were no equity award forfeitures nor dividends or other earnings paid on stock or option awards in any of the applicable years and thus no adjustments are reflected for such events in the table below.
Year202220212020
Summary Compensation Table Average for other NEOs$2,782,492 $2,848,443 $2,311,502 
DeductionsGrant date value of Stock Awards granted during fiscal year as reported in the SCT462,560 399,899 300,042 
Grant Date value of Option Awards granted during fiscal year as reported in the SCT1,387,558 1,199,793 900,003 
AdditionsFair value as of year end of outstanding and unvested equity awards granted during fiscal year1,520,657 2,340,819 3,139,539 
Change in fair value (comparing year end to the end of prior fiscal year) of equity awards granted in a prior fiscal year that are outstanding and unvested at year end(3,973,866)3,751,718 5,913,551 
Fair value of equity awards on vest date for equity awards granted and vested during fiscal year— — — 
Change in fair value (comparing the vesting date to the end of the prior fiscal year) of equity awards granted in a prior fiscal year that vested during the fiscal year(1,890,216)668,703 358,010 
Average Compensation Actually Paid to Other NEOs$(3,411,052)$8,009,991 $10,522,557 
    
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Compensation Actually Paid Versus TSR
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Compensation Actually Paid vs. Net Income [Text Block]
Compensation Actually Paid Versus Net Income
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Compensation Actually Paid vs. Company Selected Measure [Text Block]
Compensation Actually Paid Versus Organic Revenue Growth
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Total Shareholder Return Vs Peer Group [Text Block]
Compensation Actually Paid Versus TSR
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Tabular List [Table Text Block]
Financial Performance Measures (1)
Organic revenue growthOperating profit
Earnings per share (diluted)ROIC
    
Total Shareholder Return Amount $ 156.23 252.16 191.43
Peer Group Total Shareholder Return Amount 140.29 143.09 113.45
Net Income (Loss) $ 679,100,000 $ 744,800,000 $ 581,800,000
Company Selected Measure Amount 0.07 0.16 0.12
PEO Name Jonathan J. Mazelsky    
Additional 402(v) Disclosure [Text Block] Pursuant to Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 402(v) of Regulation S-K, we are required to provide annual disclosure of certain information to describe the relationship between “compensation actually paid” to our CEO and other NEOs and our financial performance. For further information regarding our compensation philosophy and how executive compensation aligns with performance, refer to the discussion under “Compensation Discussion and Analysis” beginning on page 53.The following pay versus performance table sets forth information required by Item 402(v) of Regulation S-K, including: (i) the total compensation earned by our CEO (as reported on our Summary Compensation Table), (ii) the “compensation actually paid” to our CEO (calculated in accordance with Item 402(v) of Regulation S-K), (iii) the average of the total compensation earned by our other NEOs (derived from our Summary Compensation Table), (iv) the average “compensation actually paid” to our other NEOs (calculated in accordance with Item 402(v) of Regulation S-K), (v) our net income and (vi) our organic revenue growth rate, in each case, for each of the covered fiscal years of 2020, 2021 and 2022, as well as our cumulative total shareholder return and that of the S&P 500 Health Care Index (our pay versus performance peer group) over such periodEquity values used to determine the deductions and additions set forth in the tables in notes (2) and (3) above to calculate “compensation actually paid” for our CEO and average “compensation actually paid” for our other NEOs are calculated in accordance with FASB ASC Topic 718. Adjustments with respect to stock option awards have been made as of each measurement date using the stock price as of the measurement date and updated assumptions (i.e., term, volatility and risk free rates) as of the relevant measurement date in accordance with U.S. GAAP.The measurement period to calculate total shareholder return (TSR) begins as of market close on December 31, 2019 and ends on December 31, 2020, 2021 and 2022, as applicable. The calculation of TSR assumes an initial investment of $100 as of the close of trading on December 31, 2019, and assumes dividends, if any, were reinvested. As detailed earlier under “Compensation Discussion and Analysis” beginning on page 53, we seek to create alignment between management and shareholder interests. We do so, in part, by compensating our NEOs primarily with variable and “at-risk” compensation elements, and in particular, by making a majority of the value of our NEOs’ total target direct compensation in the form of long-term equity awards. As a result, the decline in our stock price during 2022 resulted in negative “compensation actually paid” for our CEO and negative average “compensation actually paid” for our other NEOs in 2022. That was despite a payout ratio of 81% of target under our 2022 Executive Incentive Plan.
Relationship Between Compensation Actually Paid and Certain Measures
The following graphs describe the relationship between the annual total compensation actually paid to our CEO, the average annual total compensation actually paid to our other NEOs, the total shareholder return of our stock, the total shareholder return of the S&P 500 Health Care Index, our net income and our organic revenue growth rate, as each is disclosed in the pay versus performance table above.
Pursuant to Item 402(v)(6) of Regulation S-K, we are required to provide a tabular list of at least three, and up to seven, financial performance measures, which in our assessment represent the most important financial performance measures used by us to link compensation actually paid to our NEOs, for 2022, to our performance.For a description of the financial performance measures and how they factor into our annual performance-based cash bonus program, refer to the discussion under “Financial Performance Factor” beginning on page 64. 		   
Measure [Axis]: 1      
Pay vs Performance Disclosure [Table]      
Measure Name Organic revenue growth    
Non-GAAP Measure Description [Text Block] For a discussion of how organic revenue growth was used by IDEXX to link “compensation actually paid” to our NEOs in 2022 to our financial performance, refer to the discussion under “Financial Performance Factor” beginning on page 64. Organic revenue growth is a non-GAAP financial measure. Information regarding organic revenue growth and its calculation is provided in Appendix A. While we use a variety of financial performance measures for the purpose of evaluating performance as part of our executive compensation programs, we have determined that organic revenue growth is the financial performance measure that, in our assessment, represents the most important performance measure (that is not otherwise required to be disclosed in the table) used in 2022 to link “compensation actually paid” to the NEOs, to the Company’s performance, because it is the metric with the highest weighting in the financial performance factor portion of our 2022 Executive Incentive Plan.    
Measure [Axis]: 2      
Pay vs Performance Disclosure [Table]      
Measure Name Earnings per share (diluted)    
Measure [Axis]: 3      
Pay vs Performance Disclosure [Table]      
Measure Name Operating profit    
Measure [Axis]: 4      
Pay vs Performance Disclosure [Table]      
Measure Name ROIC    
PEO [Member] | Equity Awards, Stock Awards Reported Value [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ 1,937,696 $ 1,500,029 $ 1,125,087
PEO [Member] | Equity Awards, Option Awards Reported Value [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 5,812,593 4,499,229 3,375,000
PEO [Member] | Equity Awards Granted During the Year, Unvested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 6,449,518 8,858,781 11,773,116
PEO [Member] | Equity Awards Granted in Prior Years, Unvested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (15,299,044) 13,640,628 18,767,155
PEO [Member] | Equity Awards Granted During the Year, Vested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 0 0 0
PEO [Member] | Equity Awards Granted in Prior Years, Vested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (6,942,713) 2,644,866 1,795,521
Non-PEO NEO [Member] | Equity Awards, Stock Awards Reported Value [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 462,560 399,899 300,042
Non-PEO NEO [Member] | Equity Awards, Option Awards Reported Value [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 1,387,558 1,199,793 900,003
Non-PEO NEO [Member] | Equity Awards Granted During the Year, Unvested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 1,520,657 2,340,819 3,139,539
Non-PEO NEO [Member] | Equity Awards Granted in Prior Years, Unvested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (3,973,866) 3,751,718 5,913,551
Non-PEO NEO [Member] | Equity Awards Granted During the Year, Vested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 0 0 0
Non-PEO NEO [Member] | Equity Awards Granted in Prior Years, Vested [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ (1,890,216) $ 668,703 $ 358,010