EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Convertible Subordinated Debt [Member]	Sep. 30, 2013 Convertible Subordinated Debt [Member]	Sep. 30, 2014 Convertible Subordinated Debt [Member]	Sep. 30, 2013 Convertible Subordinated Debt [Member]	Jun. 03, 2009 Convertible Subordinated Debt [Member]	Sep. 30, 2014 Stock Options	Sep. 30, 2013 Stock Options	Sep. 30, 2014 Stock Options	Sep. 30, 2013 Stock Options	Sep. 30, 2014 Restricted Stock	Sep. 30, 2013 Restricted Stock	Sep. 30, 2014 Restricted Stock	Sep. 30, 2013 Restricted Stock
Earnings per share
Income (loss) from continuing operations attributable to Terex Corporation common stockholders	$ 58.7	$ 84.5	$ 179.1	$ 124.2
Income (loss) from discontinued operations – net of tax	0	10.3	1.4	12.8
Gain (loss) on disposition of discontinued operations – net of tax	5.5	(0.4)	58.5	2.6
Net income (loss) attributable to Terex Corporation	64.2	94.4	239.0	139.6
Basic shares:
Weighted average shares outstanding (in shares)	110.2	111.3	110.4	111.1
Earnings per share - basic:
Income (loss) from continuing operations (in dollars per share)	$ 0.53	$ 0.76	$ 1.62	$ 1.12
Income (loss) from discontinued operations - net of tax (in dollars per share)	$ 0.00	$ 0.09	$ 0.01	$ 0.12
Gain (loss) on disposition of discontinued operations - net of tax (in dollars per share)	$ 0.05	$ 0.00	$ 0.53	$ 0.02
Net income (loss) attributable to Terex Corporation (in dollars per share)	$ 0.58	$ 0.85	$ 2.16	$ 1.26
Diluted shares:
Weighted average shares outstanding (in shares)	110.2	111.3	110.4	111.1
Effect of dilutive securities:
Stock options, restricted stock awards and convertible notes [in shares]	5.2	4.9	5.3	4.9
Diluted weighted average shares outstanding (in shares)	115.4	116.2	115.7	116.0
Earnings per share - diluted:
Income (loss) from continuing operations (in dollars per share)	$ 0.51	$ 0.73	$ 1.55	$ 1.07
Income (loss) from discontinued operations - net of tax (in dollars per share)	$ 0.00	$ 0.08	$ 0.01	$ 0.11
Gain (loss) on disposition of discontinued operations - net of tax (in dollars per share)	$ 0.05	$ 0.00	$ 0.51	$ 0.02
Net income (loss) attributable to Terex Corporation (in dollars per share)	$ 0.56	$ 0.81	$ 2.07	$ 1.20
Reconciliation of amounts attributable to common stockholders:
Income (loss) from continuing operations [in dollars]	58.7	83.8	178.6	120.2
Noncontrolling interest (income) loss attributed to continuing operations	0	(0.7)	(0.5)	(4.0)
Income (loss) from continuing operations attributable to common stockholders [in dollars]	$ 58.7	$ 84.5	$ 179.1	$ 124.2
Other details of antidilutive securities
Antidilutive securities excluded from computation of earnings per share (in shares)											0.1	0.2	0.1	0.2	0.5	0.4	0.4	0.4
Common Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01		$ 0.01
Interest rate of debt securities (as a percent)										4.00%
Conversion price of convertible notes (in dollars per share)										$ 16.25
Incremental Common Shares Attributable to Contingently Issuable Shares						4.2	3.8	4.2	3.8