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Debt - Additional Information (Detail)
1 Months Ended 12 Months Ended
Feb. 10, 2016
USD ($)
Jun. 30, 2015
EUR (€)
Dec. 31, 2015
USD ($)
Dec. 31, 2015
EUR (€)
Dec. 31, 2014
USD ($)
Dec. 31, 2014
EUR (€)
Senior Notes            
Debt Instrument [Line Items]            
Accrued interest related to senior notes     $ 52,000,000   $ 39,000,000  
Uncommitted Credit Facility            
Debt Instrument [Line Items]            
Credit facility borrowings outstanding | €           € 0
Uncommitted Credit Facility | International Subsidiary One            
Debt Instrument [Line Items]            
Credit facility | €       € 50,000,000    
Credit facility borrowings outstanding | €       € 20,000,000    
Uncommitted Credit Facility | International Subsidiary Two            
Debt Instrument [Line Items]            
Credit facility     5,600,000      
Credit facility borrowings outstanding     5,000,000      
Credit Facility            
Debt Instrument [Line Items]            
Credit facility     $ 1,000,000,000      
Line of credit facility, expiration date     2019-09      
Credit facility borrowings outstanding     $ 0   0  
Interest, on drawn amount     LIBOR plus 150 basis points      
Commitment fee on undrawn amounts     0.20%      
Basis points added to LIBOR rate     1.50%      
Letters of credit issued under the credit facility     $ 29,000,000   15,000,000  
4.5% Senior Notes Due 2024            
Debt Instrument [Line Items]            
Senior unsecured notes principal amount     $ 500,000,000      
Senior notes, maturity date     2024-08      
Senior notes, interest rate     4.50% 4.50%    
Debt instrument redemption price percentage     100.00%      
Redemption at option of Company     We may redeem the 4.5% Notes at our option at any time in whole or from time to time in part. If we elect to redeem the 4.5% Notes prior to May 15, 2024, we may redeem them at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium. If we elect to redeem the 4.5% Notes on or after May 15, 2024, we may redeem them at a redemption price of 100% of the principal plus accrued interest.      
Senior notes issued price percentage     99.444% 99.444%    
Fair value of senior notes     $ 487,000,000   504,000,000  
4.5% Senior Notes Due 2024 | Upon the occurrence of certain change of control triggering events            
Debt Instrument [Line Items]            
Debt instrument redemption price percentage     101.00%      
2.5% Senior Notes Due 2022            
Debt Instrument [Line Items]            
Senior unsecured notes principal amount | €   € 650,000,000   € 650,000,000    
Senior notes, maturity date   2022-06        
Senior notes, interest rate   2.50%        
Debt instrument redemption price percentage   100.00%        
Redemption at option of Company     We may redeem the 2.5% Notes at our option, at whole or in part, at any time or from time to time. If we elect to redeem the 2.5% Notes prior to March 3, 2022, we may redeem them at a specified “make-whole" premium. If we elect to redeem the 2.5% Notes on or after March 3, 2022, we may redeem them at a redemption price of 100% of the principal plus accrued and unpaid interest. Subject to certain limited exceptions, all payments of interest and principal for the 2.5% Notes will be made in Euros.      
Senior notes issued price percentage   99.525%        
Fair value of senior notes     $ 705,000,000 € 644,000,000    
2.5% Senior Notes Due 2022 | Upon the occurrence of certain change of control triggering events            
Debt Instrument [Line Items]            
Debt instrument redemption price percentage     101.00%      
7.456% Senior Notes Due 2018            
Debt Instrument [Line Items]            
Senior unsecured notes principal amount     $ 500,000,000      
Senior notes, maturity date     2018-08      
Senior notes, interest rate     7.456% 7.456%    
Debt instrument redemption price percentage     100.00%      
Redemption at option of Company     At any time Expedia may redeem the 7.456% Notes at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium, in whole or in part.      
Fair value of senior notes     $ 555,000,000   581,000,000  
5.95% Senior Notes Due 2020            
Debt Instrument [Line Items]            
Senior unsecured notes principal amount     $ 750,000,000      
Senior notes, maturity date     2020-08      
Senior notes, interest rate     5.95% 5.95%    
Debt instrument redemption price percentage     100.00%      
Redemption at option of Company     We may redeem the 5.95% Notes at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium, in whole or in part.      
Senior notes issued price percentage     99.893% 99.893%    
Fair value of senior notes     $ 827,000,000   $ 840,000,000  
5.95% Senior Notes Due 2020 | Upon the occurrence of certain change of control triggering events            
Debt Instrument [Line Items]            
Debt instrument redemption price percentage     101.00%      
5.0% Senior Notes Due 2026            
Debt Instrument [Line Items]            
Senior unsecured notes principal amount     $ 750,000,000      
Senior notes, maturity date     2026-02      
Senior notes, interest rate     5.00% 5.00%    
Debt instrument redemption price percentage     100.00%      
Redemption at option of Company     We may redeem the 5.0% Notes at our option at any time in whole or from time to time in part. If we elect to redeem the 5.0% Notes prior to November 12, 2025, we may redeem them at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium. If we elect to redeem the 5.0% Notes on or after November 12, 2025, we may redeem them at a redemption price of 100% of the principal plus accrued interest.      
Senior notes issued price percentage     99.535% 99.535%    
Senior notes, potential incremental interest     0.25%      
Fair value of senior notes     $ 750,000,000      
Maximum | Credit Facility            
Debt Instrument [Line Items]            
Permissible leverage ratio     325.00% 325.00%    
Minimum | Credit Facility            
Debt Instrument [Line Items]            
Permissible interest coverage ratio     325.00% 325.00%    
Subsequent Event | Credit Facility            
Debt Instrument [Line Items]            
Credit facility $ 1,500,000,000          
Commitment fee on undrawn amounts 0.175%          
Basis points added to LIBOR rate 1.375%          
Line of credit facility, extended expiration date 2021-02          
Reduction of basis points added to LIBOR rate 0.125%          
Reduction of commitment fee on undrawn amounts 0.025%          
Subsequent Event | Maximum | Credit Facility            
Debt Instrument [Line Items]            
Permissible leverage ratio 375.00%          
Subsequent Event | Minimum | Credit Facility            
Debt Instrument [Line Items]            
Permissible interest coverage ratio 300.00%