Consolidated Statement of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Income Statement [Abstract]
Net Revenue	$ 2,230		$ 2,172
Operating Expenses
General and administrative	650		665
Advertising and marketing	142		149
Depreciation and amortization	87		73
Total operating expenses	879		887
Operating income	1,351		1,285
Other Income (Expense)
Investment income	9		7
Interest expense	(17)		(6)
Other income (expense), net	(3)		(5)
Total other income (expense)	(11)		(4)
Income before income taxes	1,340		1,281
Income tax expense	320		411
Net Income	$ 1,020		$ 870
Basic Earnings per Share	$ 0.89		$ 0.73
Basic Weighted-Average Shares Outstanding	1,148		1,185
Diluted Earnings per Share	$ 0.89		$ 0.73
Diluted Weighted-Average Shares Outstanding	1,152	[1]	1,189	[1]

[1] For the periods presented, the calculation of diluted EPS excluded a minimal amount of anti-dilutive share-based payment awards.