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Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
Feb. 05, 2020
Dec. 31, 2019
Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]      
Common stock, par value   $ 0.0001 $ 0.0001
Subsequent Event [Member]      
Equity, Class of Treasury Stock [Line Items]      
Quarterly cash dividend per share $ 0.62    
Cash dividend $ 74