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Acquisitions and Divestitures - Divestures (Details) - USD ($)
shares in Millions, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Dec. 19, 2019
Aug. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Acquisitions and Divestitures            
Number of shares issued 2.0          
Amer Global Technology Limited [Member]            
Acquisitions and Divestitures            
Ownership interest disposed     10.00%   10.00%  
Amer Global Technology Limited [Member]            
Acquisitions and Divestitures            
Ownership Interest In Disposal Goup       10.00%   10.00%
Diluted Ownership Interest In Disposal Group   10.00%     55.00%  
Disposal Gain       $ 0.5   $ 0.5
Bad debt expense relating to receivable due to subsidiary       0.6   0.6
Gain On Disposal Attributable To Ownership Interest Retained       $ 0.1   $ 0.1