CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 113.7	$ 128.7	$ (175.5)
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment, net of (provision for) benefit from taxes of $0.0, $(7.5) and $14.0, respectively	(80.9)	470.6	(123.0)
Derivative hedging adjustment, net of (provision for) benefit from taxes of $1.7, $(1.2) and $1.2, respectively	(6.5)	4.5	(4.7)
Debt and equity securities adjustment, net of (provision for) benefit from taxes of $0.0, $0.0 and $(0.1), respectively	(0.9)	3.7	6.9
Pension liability adjustment:
Net gain (loss), net of (provision for) benefit from taxes of $1.0, $(2.8) and $12.1, respectively	(4.3)	5.0	(28.3)
Amortization of actuarial (gain) loss, net of provision for (benefit from) taxes of $(1.7), $(2.2) and $(3.1), respectively	5.8	5.7	6.7
Settlement of U.S. defined benefit pension obligations, net of provision for (benefit from) taxes of $(24.4), $0.0 and $0.0, respectively	42.6	0.0	0.0
Divestiture of business, net of provision for (benefit from) taxes of $0.0, $(23.9) and $0.0, respectively	0.0	55.5	0.0
Foreign exchange and other effects, net of (provision for) benefit from taxes of $0.2, $1.9 and $(2.4), respectively	1.5	(5.1)	12.2
Total pension liability adjustment	45.6	61.1	(9.4)
Other comprehensive income (loss)	(42.7)	539.9	(130.2)
Comprehensive income (loss)	71.0	668.6	(305.7)
Comprehensive loss (income) attributable to noncontrolling interest	0.0	0.0	(0.2)
Comprehensive income (loss) attributable to Terex Corporation	$ 71.0	$ 668.6	$ (305.9)