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Stockholders' Equity - Dividends (Details) - Expedia - $ / shares
1 Months Ended
Dec. 08, 2016
Oct. 24, 2016
Feb. 24, 2017
Dividend FY 2016      
Dividends Payable [Line Items]      
Dividends declared   $ 0.26  
Dividends paid $ 0.26    
Dividend FY 2017      
Dividends Payable [Line Items]      
Dividends declared     $ 0.28