Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Amounts attributable to Chart common stockholders
(Loss) income from continuing operations	$ (14.6)	$ 10.2
Less: Mandatory convertible preferred stock dividend requirement	6.8	0.0
(Loss) income from continuing operations attributable to Chart	(21.4)	10.2
Loss from discontinued operations, net of tax	(0.4)	0.0
Net (loss) income attributable to Chart common stockholders	(21.8)	10.2
Net (loss) income attributable to Chart common stockholders	$ (21.8)	$ 10.2
Earnings per common share - basic:
(Loss) income from continuing operations (usd per share)	$ (0.51)	$ 0.28
(Loss) income from discontinued operations (usd per share)	(0.01)	0
Net (loss) income attributable to Chart Industries, Inc. - Basic (usd per share)	(0.52)	0.28
Income from continuing operations (usd per share)	(0.51)	0.25
(Loss) income from discontinued operations (usd per share)	(0.01)	0
Net (loss) income attributable to Chart Industries, Inc. - Diluted (usd per share)	$ (0.52)	$ 0.25
Weighted average number of common shares outstanding — basic (shares)	41,940	35,830
Incremental shares issuable upon assumed conversion and exercise of share-based awards (shares)	0	240
Incremental shares issuable due to dilutive effect of the convertible notes (shares)	0	2,560
Incremental shares issuable due to dilutive effect of warrants (shares)	0	2,160
Weighted average number of common shares outstanding – diluted (shares)	41,940	40,790
Antidilutive Securities Excluded from Computation of Earnings Per Share
Diluted (shares)	41,940	40,790
Anti-dilutive shares, Share-based awards
Earnings per common share - basic:
Weighted average number of common shares outstanding – diluted (shares)	180
Antidilutive Securities Excluded from Computation of Earnings Per Share
Diluted (shares)	180
Convertible note hedge and capped call transactions
Earnings per common share - basic:
Weighted average number of common shares outstanding – diluted (shares)	2,400
Antidilutive Securities Excluded from Computation of Earnings Per Share
Diluted (shares)	2,400
Anti-dilutive shares, Mandatory convertible preferred stock
Earnings per common share - basic:
Weighted average number of common shares outstanding – diluted (shares)	1,950
Antidilutive Securities Excluded from Computation of Earnings Per Share
Diluted (shares)	1,950