STOCKHOLDERS' EQUITY (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended			0 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Restricted stock awards Member	Feb. 28, 2013 Market Condition Award [Member]
Net income	$ 93.7			$ 28.3	$ 135.6	$ 135.2
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment, net of (provision for) benefit from taxes of $1.1, $0.4, $(1.8) and $(2.8) respectively	90.7			43.0	(26.4)	10.3
Cumulative translation adjustment, tax	1.1			0.4	(1.8)	(2.8)
Derivative hedging adjustment, net of (provision for) benefit from taxes of $(1.5), $(1.4), $(0.9) and $(2.3) respectively	0.6			1.6	3.5	3.4
Derivative hedging adjustment, tax	(1.5)			(1.4)	(0.9)	(2.3)
Debt and equity securities adjustment, net of (provision for) benefit from taxes of $0, $0.2, $0.6 and $(0.6), respectively	0			(0.4)	(1.9)	1.0
Debt and equity securities adjustment, tax	0			0.2	0.6	(0.6)
Pension Liability adjustment:
Amortization of actuarial (gain) loss, net of provision for (benefit from) taxes of $(0.8), $(5.5), $(2.3) and $(6.2) respectively	1.7			(4.0)	5.2	(1.7)
Amortized of actuarial (gain) loss, tax	(0.8)			(5.5)	(2.3)	(6.2)
Amortization of prior service cost, net of provision for (benefit from) taxes of $0, $0, $0 and $0 respectively	0			0	0.1	0.1
Amortization of prior service cost, tax	0			0	0	0
Foreign exchange and other effects, net of (provision for) benefit from taxes of $1.4, $4.5, $1.2 and $4.9, respectively	(3.4)			3.3	(2.6)	3.8
Foreign exchange and other effects, tax	1.4			4.5	1.2	4.9
Total pension liability adjustment	(1.7)			(0.7)	2.7	2.2
Other comprehensive income (loss)	89.6	(32.8)	(78.9)	43.5	(22.1)	16.9
Comprehensive income (loss)	183.3			71.8	113.5	152.1
Comprehensive loss (income) attributable to noncontrolling interest	0.7			1.9	4.0	3.9
Comprehensive income (loss) attributable to Terex Corporation	$ 184.0			$ 73.7	$ 117.5	$ 156.0
Share-based compensation
Granted (in shares)							1,300,000
Granted (in dollars per shares)							$ 34.11	$ 43.64
Percentage of awards that vest over a three year period (as a percent)							61.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period [in years]							3 years
Percentage of awards that vest at end of three year period (as a percent)							39.00%
Percentage of awards subject to performance conditions (as a percent)							12.00%
Dividend yields (as a percent)								0.00%
Expected volatility (as a percent)								60.03%
Risk-free interest rate (as a percent)								0.35%
Expected life (in years)								3 years
StockIssuedDuringPeriodSharesEmployeeStockTrust					53,000