Long-Term Debt and Capital Lease Obligations - Maturity and Fair Value (Details) - Mar. 31, 2017 € in Millions, $ in Millions	EUR (€)	USD ($)
Debt instrument face amount		$ 3,566
Expedia 7.456% Notes
Debt instrument face amount		500
Expedia 5.95% Notes
Debt instrument face amount		750
Expedia 4.5% Notes
Debt instrument face amount		500
Expedia 2.5% Notes
Debt instrument face amount		694
Expedia 5.0% Notes
Debt instrument face amount		750
Vitalize Secured Notes
Debt instrument face amount		12
Expedia | Expedia 7.456% Notes
Debt instrument face amount		500
Expedia | Expedia 7.456% Notes | Level 2
Fair value of debt securities		536
Expedia | Expedia 5.95% Notes
Debt instrument face amount		750
Expedia | Expedia 5.95% Notes | Level 2
Fair value of debt securities		825
Expedia | Expedia 4.5% Notes
Debt instrument face amount		500
Expedia | Expedia 4.5% Notes | Level 2
Fair value of debt securities		526
Expedia | Expedia 2.5% Notes
Fair value of debt securities | €	€ 689
Debt instrument face amount | €	€ 650
Expedia | Expedia 2.5% Notes | Level 2
Fair value of debt securities		736
Expedia | Expedia 5.0% Notes
Debt instrument face amount		750
Expedia | Expedia 5.0% Notes | Level 2
Fair value of debt securities		$ 804