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Stockholders' Equity - Non-Controlling Interest (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Oct. 31, 2013
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Mar. 29, 2019
Mac Dermid          
Class of Stock          
Equity instruments $ 97.5        
Net income (loss) allocated to Retaining Holders   $ (0.6) $ 0.5 $ 0.6  
Mac Dermid | PDH          
Class of Stock          
Total number of shares of common stock originally issuable upon the exchange of PDH common stock pursuant to the RHSA (in shares) 8,774,527        
PDH          
Class of Stock          
Common stock issued in connection with exchange of PDH common stock (in shares)         1