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Stockholders' Equity (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Equity [Abstract]        
Selling, technical, general and administrative $ 13.6 $ 0.0 $ 13.6 $ 0.0