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Stockholders' Equity Common Stock (Details) - $ / shares
6 Months Ended
Jun. 30, 2019
Jun. 26, 2019
Dec. 31, 2018
Jun. 30, 2018
Class of Stock [Line Items]        
Common Stock, Shares Authorized 1,666,666,667   1,666,666,667 1,666,666,667
Common Stock, Par Value $ 0.01   $ 0.01 $ 0.01
Stock Repurchase Program, Number of Shares Authorized to be Repurchased   1,000,000,000    
Common Stock, Shares, Issued 748,815,000   748,815,000 748,815,000
Document Period End Date Jun. 30, 2019