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Revenue
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
Disaggregated revenue from continuing operations for the fiscal years ended December 31, 2021, 2020, and 2019, are included below and in Note 17, Segment Information.
Years ended December 31,
202120202019
In millionsGas CylindersElektronTotalGas CylindersElektronTotalGas CylindersElektronTotal
General industrial$33.4 $95.8 $129.2 $24.2 $87.7 $111.9 $24.7 $111.7 $136.4 
Transportation71.2 45.8 117.0 49.8 42.3 92.1 48.5 59.5 108.0 
Defense, First Response & Healthcare73.7 54.2 127.9 67.9 52.9 120.8 80.3 48.7 129.0 
$178.3 $195.8 $374.1 $141.9 $182.9 $324.8 $153.5 $219.9 $373.4 
The Company’s performance obligations are satisfied at a point in time. With the classification of our Superform business as discontinued operations, none of the Company's revenue is satisfied over time. As a result, the Company's contract receivables, contract assets and contract liabilities at December 31, 2021, and December 31, 2020, are disclosed with current assets and liabilities held-for-sale.