Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net income attributable to Chart Industries, Inc.
Net income attributable to Chart Industries, Inc.	$ 13.0	$ 6.5	$ 23.2	$ 32.1
Earnings per common share – basic:
Basic (usd per share)	$ 0.36	$ 0.18	$ 0.65	$ 0.90
Diluted (usd per share)	$ 0.31	$ 0.16	$ 0.56	$ 0.79
Weighted average number of common shares outstanding — basic (shares)	35,860	35,610	35,850	35,580
Incremental shares issuable upon assumed conversion and exercise of share-based awards (shares)	260	310	250	320
Incremental shares issuable due to dilutive effect of convertible (shares)	2,890	2,640	2,730	2,610
Incremental shares issuable due to dilutive effect of warrants (shares)	2,550	2,250	2,350	2,210
Weighted average number of common shares outstanding – diluted (shares)	41,560	40,810	41,180	40,720