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Revenue Recognition - Additional Information (Detail)
3 Months Ended
Mar. 31, 2018
USD ($)
Segment
Number of reportable segments | Segment 3
Recognition of contract assets as a result of business combination $ 0
Revenue recognition included in short-term contract liabilities 25,000,000
Recognition of contract liabilities as a result of business combination 0
Unsignificant adjustment to revenue from performance obligations 0
Contract with customer, asset, reclassified to receivable 0
Capitalized acquisition cost 39,000,000
Capitalized contract cost, amortization 7,000,000
Capitalized contract cost, impairment loss 0
Impairment charges related to contract assets 0
Accrued Expenses and Other Current Liabilities  
Deferred liability related to loyalty programs 22,000,000
Contract Assets  
Impairment charges related to contract assets $ 0