Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amounts attributable to Chart common stockholders
Income from continuing operations	$ 47.9	$ 81.6	$ 59.1
Less: Mandatory convertible preferred stock dividend requirement	27.3	1.4	0.0
Income from continuing operations attributable to Chart	20.6	80.2	59.1
Loss from discontinued operations, net of tax	(0.6)	(57.6)	0.0
Net income attributable to Chart common stockholders, basic	20.0	22.6	59.1
Net income attributable to Chart common stockholders, diluted	$ 20.0	$ 22.6	$ 59.1
Earnings per common share – basic:
Income from continuing operations (usd per share)	$ 0.49	$ 2.21	$ 1.66
Loss from discontinued operations (usd per share)	(0.01)	(1.59)	0
Net income attributable to Chart Industries, Inc. (usd per share)	0.48	0.62	1.66
Earnings per common share – diluted:
Income from continuing operations (usd per share)	0.44	1.92	1.44
Loss from discontinued operations (usd per share)	(0.01)	(1.38)	0
Net income attributable to Chart Industries, Inc. (usd per share)	$ 0.43	$ 0.54	$ 1.44
Weighted average number of common shares outstanding — basic (shares)	41,970	36,250	35,610
Incremental shares issuable upon assumed conversion and exercise of share-based awards (shares)	200	260	340
Incremental shares issuable due to dilutive effect of the convertible notes (shares)	2,530	2,810	2,760
Incremental shares issuable due to dilutive effect of warrants (shares)	2,120	2,470	2,400
Incremental shares issuable due to dilutive effect of the underwriters common shares option (shares)	0	10	0
Weighted average number of common shares outstanding — diluted (shares)	46,820	41,800	41,110