Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Amounts attributable to Chart common stockholders
Income from continuing operations	$ 9.4	$ 41.2	$ 0.1	$ 64.4
Less: Mandatory convertible preferred stock dividend requirement	6.8	0.0	20.5	0.0
Income (loss) from continuing operations attributable to Chart	2.6	41.2	(20.4)	64.4
Loss from discontinued operations, net of tax	(6.0)	0.0	(2.6)	0.0
Net (loss) income attributable to Chart common stockholders	(3.4)	41.2	(23.0)	64.4
Net (loss) income attributable to Chart common stockholders	$ (3.4)	$ 41.2	$ (23.0)	$ 64.4
Earnings per common share – basic:
Income (loss) from continuing operations (usd per share)	$ 0.06	$ 1.15	$ (0.49)	$ 1.80
Loss from discontinued operations (usd per share)	(0.14)	0	(0.06)	0
Net (loss) income attributable to Chart Industries, Inc. - Basic (usd per share)	(0.08)	1.15	(0.55)	1.80
Earnings per common share – diluted:
Income (loss) from continuing operations (usd per share)	0.05	0.98	(0.49)	1.56
Loss from discontinued operations (usd per share)	(0.12)	0	(0.06)	0
Net (loss) income attributable to Chart Industries, Inc. - Diluted (usd per share)	$ (0.07)	$ 0.98	$ (0.55)	$ 1.56
Weighted average number of common shares outstanding — basic (shares)	41,980,000	35,870,000	41,960,000	35,850,000
Incremental shares issuable upon assumed conversion and exercise of share-based awards (shares)	240,000	280,000	0	260,000
Incremental shares issuable due to dilutive effect of the convertible notes (shares)	2,860,000	3,010,000.00	0	2,820,000
Incremental shares issuable due to dilutive effect of the warrants (shares)	2,530,000	2,700,000	0	2,470,000
Weighted average number of common shares outstanding – diluted (shares)	47,610,000	41,860,000	41,960,000	41,400,000