IDEXX Retirement and Incentive Savings Plan (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan | Switzerland
Retirement And Incentive Savings Plan [Line Items]
Defined benefit plan, benefit obligation	$ 4,000,000
Defined benefit plan, plan assets, amount	12,500,000
Pension expense	$ 1,500,000
401(k) Plan
Retirement And Incentive Savings Plan [Line Items]
Contribution match, maximum percent of participants' eligible compensation	5.00%	5.00%	5.00%
Employer contributions	$ 28,300,000	$ 25,800,000	$ 23,400,000
Discretionary contributions	$ 0	$ 0	$ 0