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Business Combinations - Pro Forma Information (Details) - AXC - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Business Acquisition, Pro Forma Information    
Pro forma sales $ 382.1 $ 747.7
Pro forma net income attributable to Chart Industries, Inc. $ 19.4 $ 25.2
Pro forma net income attributable to Chart Industries, Inc. per common share, basic (usd per share) $ 0.54 $ 0.71
Pro forma net income attributable to Chart Industries, Inc. per common share, diluted (usd per share) $ 0.51 $ 0.66