Cover Page Cover page - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 09, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	1-10702
Entity Registrant Name	TEREX CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	34-1531521
Entity Address, Address Line One	45 Glover Ave, 4th Floor
Entity Address, City or Town	Norwalk
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06850
City Area Code	203
Local Phone Number	222-7170
Title of 12(b) Security	COMMON STOCK, $.01 PAR VALUE
Trading Symbol	TEX
Security Exchange Name	NYSE
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			$ 1,256.0
Entity Common Stock, Shares Outstanding		69.4
Documents Incorporated by Reference	Portions of the Terex Corporation Proxy Statement to be filed with the Securities and Exchange Commission within 120 days after the year covered by this Form 10-K with respect to the 2021 Annual Meeting of Stockholders are incorporated by reference into Part III hereof.
Entity Central Index Key	0000097216
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false