Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 309.5	$ 46.8	$ 90.0
Other comprehensive income (loss):
Foreign currency translation adjustments	38.8	(7.5)	(19.7)
Defined benefit pension plan:
Actuarial (loss) gain on remeasurement	(1.9)	0.3	(3.5)
Amortization of net loss	1.2	1.3	0.9
Defined benefit pension plan	(0.7)	1.6	(2.6)
Other comprehensive income (loss), before tax	38.1	(5.9)	(22.3)
Income tax benefit (expense) related to defined benefit pension plan	0.2	(0.1)	0.5
Other comprehensive income (loss), net of taxes	38.3	(6.0)	(21.8)
Comprehensive income	347.8	40.8	68.2
Less: Comprehensive income attributable to noncontrolling interests, net of taxes	(1.4)	(0.4)	(2.0)
Comprehensive income attributable to Chart Industries, Inc.	$ 346.4	$ 40.4	$ 66.2