EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings per share
Income (loss) from continuing operations attributable to Terex Corporation common stockholders (in dollars)	$ 111.3	$ 60.0	$ (193.0)
Income (loss) from discontinued operations – net of tax	0.0	0.0	13.4
Gain (loss) on disposition of discontinued operations - net of tax (in dollars)	2.4	68.7	3.5
Net income (loss) attributable to Terex Corporation	$ 113.7	$ 128.7	$ (176.1)
Basic shares:
Weighted average shares outstanding (in shares)	75.4	92.8	107.9
Earnings per share - basic:
Income (loss) from continuing operations (in dollars per share)	$ 1.48	$ 0.65	$ (1.79)
Income (loss) from discontinued operations – net of tax (in dollars per share)	0.00	0.00	0.13
Gain (loss) on disposition of discontinued operations – net of tax (in dollars per share)	0.03	0.74	0.03
Net income (loss) attributable to Terex Corporation (in dollars per share)	$ 1.51	$ 1.39	$ (1.63)
Diluted shares:
Weighted average shares outstanding (in shares)	75.4	92.8	107.9
Effect of dilutive securities:
Stock options, restricted stock awards and convertible notes (in shares)	1.5	2.1	0.0
Diluted weighted average shares outstanding (in shares)	76.9	94.9	107.9
Earnings per share - diluted:
Income (loss) from continuing operations (in dollars per share)	$ 1.45	$ 0.63	$ (1.79)
Income (loss) from discontinued operations – net of tax (in dollars per share)	0.00	0.00	0.13
Gain (loss) on disposition of discontinued operations – net of tax (in dollars per share)	0.03	0.73	0.03
Net income (loss) attributable to Terex Corporation (in dollars per share)	$ 1.48	$ 1.36	$ (1.63)
Reconciliation of amounts attributable to common stockholders:
Income (loss) from continuing operations (in dollars)	$ 111.3	$ 60.0	$ (193.3)
Noncontrolling interest attributable to Income (loss) from continuing operations (in dollars)	0.0	0.0	0.3
Income (loss) from continuing operations attributable to Terex Corporation common stockholders (in dollars)	$ 111.3	$ 60.0	$ (193.0)
Restricted Stock
Other details of antidilutive securities
Antidilutive securities excluded from computation of earnings per share (in shares)	0.2		1.5