Consolidated Statements of Operations (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Revenue	$ 281		$ 230
Costs and expenses:
Cost of revenue	8	[1]	4	[1]
Selling and marketing	101	[2]	79	[2]
Technology and content	38	[2]	29	[2]
General and administrative	26	[2]	23	[2]
Depreciation	10		6
Amortization of intangible assets	2		1
Total costs and expenses:	185		142
Operating income	96		88
Other income (expense):
Interest expense	(2)		(3)
Interest income and other, net			(1)
Total other expense, net	(2)		(4)
Income before income taxes	94		84
Provision for income taxes	(26)		(22)
Net income	68		62
Earnings per share attributable to common stockholders (note 11):
Basic	$ 0.48		$ 0.44
Diluted	$ 0.47		$ 0.43
Weighted average common shares outstanding (note 11):
Basic	142,399		143,063
Diluted	145,665		144,655
Stock-based compensation:
Stock-based compensation	14		14
Software Development
Costs and expenses:
Depreciation	6		4
Selling and Marketing
Stock-based compensation:
Stock-based compensation	3		2
Technology and Content
Stock-based compensation:
Stock-based compensation	6		7
General and Administrative
Stock-based compensation:
Stock-based compensation	$ 5		$ 5

[1] Excludes amortization as follows

[2] Includes stock-based compensation as follows: