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CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation expense	$ 697	$ 556
Cost of revenues \| Google
Stock-based compensation expense	99	74
Cost of revenues \| Motorola Mobile
Stock-based compensation expense	5	0
Research and development
Stock-based compensation expense	361	299
Sales and marketing
Stock-based compensation expense	125	97
General and administrative
Stock-based compensation expense	$ 107	$ 86

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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