Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 378.9	$ 328.3	$ 322.0	$ 288.5	$ 312.4	$ 273.2	$ 289.6	$ 301.9	$ 1,317.7	$ 1,177.1	$ 1,215.5
Gross profit	82.2	74.9	83.2	83.9	87.9	78.6	83.3	82.3	324.2	332.1	297.5
Operating (loss) income	20.4	13.8	25.5	28.8	22.5	28.1	25.8	15.8	88.5	92.2	52.0
(Loss) income from continuing operations	12.1	14.9	6.5	25.6	37.5	15.6	13.8	2.0	59.1	68.9	31.4
Income from discontinued operations, net of tax					220.3	6.1	6.4	6.4		239.2
Net income attributable to Chart Industries, Inc.	$ 12.1	$ 14.9	$ 6.5	$ 25.6	$ 257.8	$ 21.7	$ 20.2	$ 8.4	$ 59.1	$ 308.1	$ 46.4
Basic earnings per common share attributable to Chart Industries, Inc.
(Loss) income from continuing operations (usd per share)	$ 0.34	$ 0.42	$ 0.18	$ 0.72	$ 1.06	$ 0.44	$ 0.39	$ 0.06	$ 1.66	$ 1.95	$ 0.93
Income from discontinued operations (usd per share)					6.23	0.18	0.18	0.17	0	6.76	0.44
Net income attributable to Chart Industries, Inc. (usd per share)	0.34	0.42	0.18	0.72	7.29	0.62	0.57	0.23	1.66	8.71	1.37
Diluted earnings per common share attributable to Chart Industries, Inc.
(Loss) income from continuing operations (usd per share)	0.29	0.36	0.16	0.63	0.97	0.43	0.39	0.06	1.44	1.89	0.89
Income from discontinued operations (usd per share)					5.72	0.17	0.18	0.17	0	6.56	0.43
Net income attributable to Chart Industries, Inc. (usd per share)	$ 0.29	$ 0.36	$ 0.16	$ 0.63	$ 6.69	$ 0.60	$ 0.57	$ 0.23	$ 1.44	$ 8.45	$ 1.32