CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cost of Revenues
Stock-based compensation expense	$ 249	$ 67	$ 47
Research and Development Expense
Stock-based compensation expense	1,061	861	725
Sales and Marketing Expense
Stock-based compensation expense	361	261	231
General and Administrative Expense
Stock-based compensation expense	$ 303	$ 187	$ 161