Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Sales	$ 319.9	$ 238.2	$ 599.6	$ 442.3
Cost of sales	235.4	175.0	438.0	323.4
Gross profit	84.5	63.2	161.6	118.9
Selling, general, and administrative expenses	55.3	50.2	109.4	102.6
Amortization expense	5.7	3.1	11.8	6.1
Operating expenses	61.0	53.3	121.2	108.7
Operating Income	23.5	9.9	40.4	10.2
Other expenses:
Interest expense, net	6.2	3.8	12.6	8.2
Financing costs amortization	0.4	0.4	0.7	0.7
Foreign currency (gain) loss	(1.2)	0.2	0.4	0.5
Other expenses, net	5.4	4.4	13.7	9.4
Income before income taxes	18.1	5.5	26.7	0.8
Income tax expense	5.0	2.2	7.3	0.4
Net income	13.1	3.3	19.4	0.4
Less: Income attributable to noncontrolling interests, net of taxes	0.8	0.5	1.3	0.5
Net income (loss) attributable to Chart Industries, Inc.	$ 12.3	$ 2.8	$ 18.1	$ (0.1)
Net income (loss) attributable to Chart Industries, Inc. per common share:
Basic (usd per share)	$ 0.40	$ 0.09	$ 0.59	$ 0.00
Diluted (usd per share)	$ 0.38	$ 0.09	$ 0.57	$ 0.00
Weighted-average number of common shares outstanding:
Basic (shares)	30,950	30,730	30,930	30,710
Diluted (shares)	32,080	31,280	31,740	30,710
Comprehensive (loss) income, net of taxes	$ (8.9)	$ 15.0	$ 9.9	$ 14.7
Less: Comprehensive income attributable to noncontrolling interests, net of taxes	0.2	0.6	0.8	0.5
Comprehensive (loss) income attributable to Chart Industries, Inc., net of taxes	$ (9.1)	$ 14.4	$ 9.1	$ 14.2