Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents (Note 6)	$ 635	$ 673
Short-term marketable securities (Note 6)	15	35
Accounts receivable and contract assets, net of allowance for doubtful accounts of $17 and $16, respectively	281	230
Prepaid expenses and other current assets	52	55
Total current assets	983	993
Long-term marketable securities (Note 6)	5	27
Property and equipment, net of accumulated depreciation of $198 and $177, respectively	261	263
Intangible assets, net of accumulated amortization of $120 and $112, respectively	136	142
Goodwill	763	758
Deferred income taxes, net	18	16
Other long-term assets	74	73
TOTAL ASSETS	2,240	2,272
Current liabilities:
Accounts payable	7	8
Deferred merchant payables	269	156
Deferred revenue	101	60
Current portion of debt (Note 7)	7	7
Accrued expenses and other current liabilities	150	141
Total current liabilities	534	372
Long-term debt (Note 7)		230
Deferred income taxes, net	16	14
Other long-term liabilities	300	293
Total Liabilities	850	909
Commitments and contingencies (Note 9)
Stockholders’ equity: (Note 10)
Preferred stock, $0.001 par value Authorized shares: 100,000,000 Shares issued and outstanding: 0 and 0
Additional paid-in capital	946	926
Retained earnings	935	926
Accumulated other comprehensive loss	(34)	(42)
Treasury stock-common stock, at cost, 9,727,140 and 9,474,490 shares, respectively	(457)	(447)
Total Stockholders’ Equity	1,390	1,363
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 2,240	$ 2,272