Quarterly report pursuant to Section 13 or 15(d)

Recent Accounting Pronouncements - Contract Balances (Details)

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Recent Accounting Pronouncements - Contract Balances (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
Accounts Receivable $ 285 $ 285   $ 230
Contract assets 15 15    
Total 300 300   $ 230
Trip Advisor        
Deferred revenue     $ 59  
Contract with customer revenue recognized $ 13 $ 45