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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table presents calculations of net income (loss) per share of common stock:
 
 
Year Ended December 31,
 
2017
 
2016
 
2015
Net income (loss) attributable to Chart Industries, Inc.
$
28.0

 
$
28.2

 
$
(203.0
)
Net income (loss) attributable to Chart Industries, Inc. per common share:
 
 
 
 
 
Basic
$
0.91

 
$
0.92

 
$
(6.66
)
Diluted
$
0.89

 
$
0.91

 
$
(6.66
)
 
 
 
 
 
 
Weighted average number of common shares outstanding — basic
30.74

 
30.58

 
30.49

Incremental shares issuable upon assumed conversion and exercise of share-based awards
0.60

 
0.41

 
—

Weighted average number of common shares outstanding — diluted
31.34

 
30.99

 
30.49
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Diluted earnings per share does not consider the following potential common shares as the effect would be anti-dilutive:
 
Year Ended December 31,
 
2017
 
2016
 
2015
Share-based awards
0.40

 
0.56

 
0.94

Warrants
5.18

 
3.37

 
3.37

Total anti-dilutive securities
5.58

 
3.93

 
4.31