Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amounts attributable to Chart common stockholders
Income from continuing operations	$ 24.0	$ 59.1	$ 308.1
Less: Mandatory convertible preferred stock dividend requirement	1.4	0.0	0.0
Income from continuing operations attributable to Chart	80.2	59.1	68.9
(Loss) income from discontinued operations, net of tax	(57.6)	0.0	239.2
Net income attributable to Chart common stockholders, basic	22.6	59.1	308.1
Net income attributable to Chart common stockholders, diluted	$ 22.6	$ 59.1	$ 308.1
Earnings per common share – basic:
Income from continuing operations (usd per share)	$ 2.21	$ 1.66	$ 1.95
(Loss) income from discontinued operations (usd per share)	(1.59)	0	6.76
Net income attributable to Chart Industries, Inc. (usd per share)	0.62	1.66	8.71
Earnings per common share – diluted:
Income from continuing operations (usd per share)	1.92	1.44	1.89
(Loss) income from discontinued operations (usd per share)	(1.38)	0	6.56
Net income attributable to Chart Industries, Inc. (usd per share)	$ 0.54	$ 1.44	$ 8.45
Weighted average number of common shares outstanding — basic (shares)	36,250	35,610	35,380
Incremental shares issuable upon assumed conversion and exercise of share-based awards (shares)	260	340	260
Incremental shares issuable due to dilutive effect of the convertible notes (shares)	2,810	2,760	530
Incremental shares issuable due to dilutive effect of warrants (shares)	2,470	2,400	280
Incremental shares issuable due to dilutive effect of the underwriters common shares option (shares)	10	0	0
Weighted average number of common shares outstanding — diluted (shares)	41,800	41,110	36,450