Condensed Consolidated Statements of Income and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Sales	$ 309.6	$ 277.9	$ 598.9	$ 522.0
Cost of sales	226.8	205.1	449.0	382.3
Gross profit	82.8	72.8	149.9	139.7
Selling, general, and administrative expenses	50.2	48.1	105.5	94.7
Amortization expense	7.3	5.2	14.5	10.7
Operating expenses	57.5	53.3	120.0	105.4
Operating income	25.3	19.5	29.9	34.3
Other expenses:
Interest expense, net	5.4	6.2	10.7	12.6
Financing costs amortization	0.6	0.4	1.0	0.7
Foreign currency (gain) loss and other	(0.2)	(1.7)	(0.3)	0.1
Other expenses, net	5.8	4.9	11.4	13.4
Income from continuing operations before income taxes	19.5	14.6	18.5	20.9
Income tax expense	4.9	3.9	2.9	5.5
Net income from continuing operations	14.6	10.7	15.6	15.4
Income from discontinued operations, net of taxes	0.0	2.4	0.0	4.0
Net income	14.6	13.1	15.6	19.4
Less: Income attributable to noncontrolling interests of continuing operations, net of taxes	0.2	0.8	0.3	1.3
Net income attributable to Chart Industries, Inc.	14.4	12.3	15.3	18.1
Net income attributable to Chart Industries, Inc.
Income from continuing operations	14.4	9.9	15.3	14.1
Income from discontinued operations, net of taxes	0.0	2.4	0.0	4.0
Net income attributable to Chart Industries, Inc.	$ 14.4	$ 12.3	$ 15.3	$ 18.1
Basic earnings per common share attributable to Chart Industries, Inc.
Income from continuing operations (usd per share)	$ 0.44	$ 0.32	$ 0.48	$ 0.46
Income from discontinued operations (usd per share)	0	0.08	0	0.13
Net income attributable to Chart Industries, Inc. (usd per share)	0.44	0.40	0.48	0.59
Diluted earnings per common share attributable to Chart Industries, Inc.
Income from continuing operations (usd per share)	0.41	0.31	0.45	0.44
Income from discontinued operations (usd per share)	0	0.07	0	0.13
Net income attributable to Chart Industries, Inc. (usd per share)	$ 0.41	$ 0.38	$ 0.45	$ 0.57
Weighted-average number of common shares outstanding:
Basic (shares)	32,470	30,950	32,020	30,930
Diluted (shares)	34,720	32,080	34,250	31,740
Comprehensive income (loss), net of taxes	$ 16.2	$ (8.9)	$ 12.6	$ 9.9
Less: Comprehensive income attributable to noncontrolling interests, net of taxes	0.2	0.2	0.3	0.8
Comprehensive income (loss) attributable to Chart Industries, Inc., net of taxes	$ 16.0	$ (9.1)	$ 12.3	$ 9.1