EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 03, 2009
Earnings per share
Income (loss) from continuing operations attributable to Terex Corporation common stockholders (in dollars)	$ 259.0	$ 209.0	$ 77.0
Income (loss) from discontinued operations-net of tax (in dollars)	1.4	14.4	28.4
Gain (loss) on disposition of discontinued operations - net of tax (in dollars)	58.6	2.6	0.4
Net income (loss) attributable to Terex Corporation	319.0us-gaap_NetIncomeLoss	226.0us-gaap_NetIncomeLoss	105.8us-gaap_NetIncomeLoss
Basic shares:
Weighted average shares outstanding (in shares)	109.7	111.1	110.3
Earnings per share - basic:
Income (loss) from continuing operations	$ 2.36	$ 1.88	$ 0.70
Income (loss) from discontinued operations – net of tax	$ 0.01	$ 0.13	$ 0.26
Gain (loss) on disposition of discontinued operations – net of tax	$ 0.54	$ 0.02	$ 0.00
Net income (loss) attributable to Terex Corporation (in dollars per share)	$ 2.91us-gaap_EarningsPerShareBasic	$ 2.03us-gaap_EarningsPerShareBasic	$ 0.96us-gaap_EarningsPerShareBasic
Diluted shares:
Weighted average shares outstanding (in shares)	109.7	111.1	110.3
Effect of dilutive securities:
Stock options, restricted stock awards and convertible notes (in shares)	4.5	5.9	3.6
Diluted weighted average shares outstanding (in shares)	114.2	117.0	113.9
Earnings per share - diluted:
Income (loss) from continuing operations	$ 2.27	$ 1.79	$ 0.68
Income (loss) from discontinued operations – net of tax	$ 0.01	$ 0.12	$ 0.25
Gain (loss) on disposition of discontinued operations – net of tax	$ 0.51	$ 0.02	$ 0.00
Net income (loss) attributable to Terex Corporation (in dollars per share)	$ 2.79us-gaap_EarningsPerShareDiluted	$ 1.93us-gaap_EarningsPerShareDiluted	$ 0.93us-gaap_EarningsPerShareDiluted
Reconciliation of amounts attributable to common stockholders:
Income (loss) from continuing operations (in dollars)	259.5	203.9	74.8
Noncontrolling interest attributable to Income (loss) from continuing operations (in dollars)	(0.5)	5.1	2.2
Income (loss) from continuing operations attributable to Terex Corporation common stockholders (in dollars)	$ 259.0	$ 209.0	$ 77.0
Other details of antidilutive securities
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Contingently issuable shares (in shares)	3.4	4.6	2.9
Convertible Subordinated Debt
Other details of antidilutive securities
Interest rate of debt securities (as a percent)				4.00%
Conversion price of convertible notes (in dollars per share)	$ 16.25			$ 16.25
Stock Options
Other details of antidilutive securities
Antidilutive securities excluded from computation of earnings per share (in shares)	0.1	0.2	0.2
Restricted Stock [Member]
Other details of antidilutive securities
Antidilutive securities excluded from computation of earnings per share (in shares)	0.4	0.3	0.3

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