CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Sales	$ 1,317.7	$ 1,177.1	$ 1,215.5
Cost of sales	993.5	845.0	918.0
Gross profit	324.2	332.1	297.5
Selling, general and administrative expenses	196.8	178.2	205.7
Amortization expense	38.9	45.7	39.8
Asset impairments	0.0	16.0	0.0
Operating expenses	235.7	239.9	245.5
Operating income	88.5	92.2	52.0
Interest expense, net	10.7	17.7	14.7
Financing costs amortization	8.3	4.3	3.0
Unrealized (gain) loss on investment in equity securities	(3.2)	(13.1)	0.1
Realized gain on investment in equity securities	(2.6)	0.0	0.0
Foreign currency loss (gain)	0.9	0.9	(0.4)
Gain on bargain purchase	0.0	(5.0)	0.0
Other expense, net	0.3	2.2	0.0
Income from continuing operations before income taxes and equity in earnings of unconsolidated affiliates, net	74.1	85.2	34.6
Income tax expense (benefit):
Current	21.4	13.9	19.0
Deferred	(7.9)	1.0	(16.2)
Income tax expense, net	13.5	14.9	2.8
Income from continuing operations before equity in earnings of unconsolidated affiliates, net	60.6	70.3	31.8
Equity in earnings of unconsolidated affiliates, net	0.3	0.0	0.0
Net income from continuing operations	60.9	70.3	31.8
Income from discontinued operations, net of tax	0.0	239.2	15.0
Net income	60.9	309.5	46.8
Less: Income attributable to noncontrolling interests of continuing operations, net of taxes	1.8	1.4	0.4
Net income attributable to Chart Industries, Inc.	59.1	308.1	46.4
Net income attributable to Chart Industries, Inc.
Income from continuing operations	59.1	68.9	31.4
Income from discontinued operations, net of tax	0.0	239.2	15.0
Net income attributable to Chart Industries, Inc.	$ 59.1	$ 308.1	$ 46.4
Basic earnings per common share attributable to Chart Industries, Inc.
Income from continuing operations (usd per share)	$ 1.66	$ 1.95	$ 0.93
Income from discontinued operations (usd per share)	0	6.76	0.44
Net income attributable to Chart Industries, Inc. (usd per share)	1.66	8.71	1.37
Diluted earnings per common share attributable to Chart Industries, Inc.
Income from continuing operations (usd per share)	1.44	1.89	0.89
Income from discontinued operations (usd per share)	0	6.56	0.43
Net income attributable to Chart Industries, Inc. (usd per share)	$ 1.44	$ 8.45	$ 1.32
Weighted-average number of common shares outstanding:
Basic (shares)	35,610	35,380	33,910
Diluted (shares)	41,110	36,450	35,170