Earnings Per Share - Calculation of Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Amounts attributable to Chart common shareholders
Income from continuing operations	$ 69.4	$ 9.4	$ 141.7	$ 0.1
Less: Mandatory convertible preferred stock dividend requirement	6.8	6.8	20.4	20.5
Income (loss) from continuing operations attributable to Chart	62.6	2.6	121.3	(20.4)
Loss from discontinued operations, net of tax	(0.4)	(6.0)	(2.8)	(2.6)
Net income (loss) attributable to Chart common shareholders — basic	62.2	(3.4)	118.5	(23.0)
Net income (loss) attributable to Chart common shareholders	$ 62.2	$ (3.4)	$ 118.5	$ (23.0)
Earnings per common share – basic:
Income (loss) from continuing operations (usd per share)	$ 1.49	$ 0.06	$ 2.89	$ (0.49)
Loss from discontinued operations (usd per share)	(0.01)	(0.14)	(0.07)	(0.06)
Net income (loss) attributable to Chart Industries, Inc. — basic (usd per share)	1.48	(0.08)	2.82	(0.55)
Earnings per common share – diluted:
Income (loss) from continuing operations (usd per share)	1.34	0.05	2.59	(0.49)
Loss from discontinued operations (usd per share)	(0.01)	(0.12)	(0.06)	(0.06)
Net income (loss) attributable to Chart Industries, Inc. — diluted (usd per share)	$ 1.33	$ (0.07)	$ 2.53	$ (0.55)
Weighted average number of common shares outstanding — basic (shares)	42,050	41,980	42,040	41,960
Incremental shares issuable upon assumed conversion and exercise of share-based awards (shares)	190	240	190	0
Incremental shares issuable due to dilutive effect of convertible notes (shares)	2,430	2,860	2,540	0
Incremental shares issuable due to dilutive effect of the warrants (shares)	2,000	2,530	2,120	0
Weighted average number of common shares outstanding — diluted (shares)	46,670	47,610	46,890	41,960