Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 10, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	0-25092
Entity Registrant Name	INSIGHT ENTERPRISES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-0766246
Entity Address, Address Line One	2701 E. Insight Way
Entity Address, City or Town	Chandler
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85286
City Area Code	480
Local Phone Number	333-3000
Title of 12(b) Security	Common stock, par value $0.01
Trading Symbol	NSIT
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,668,515,639
Entity Common Stock, Shares Outstanding		33,807,565
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCEPortions of the registrant’s Proxy Statement relating to its 2023 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days after December 31, 2022 have been incorporated by reference into Part III, Items 10, 11, 12, 13 and 14 of this Annual Report on Form 10-K.
Entity Central Index Key	0000932696
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false