CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accounts receivable, allowances for doubtful accounts	$ 18	$ 17
Convertible preferred stock, par value	$ 0.000006	$ 0.000006
Convertible preferred stock, shares authorized	0	569
Convertible preferred stock, shares issued	0	543
Convertible preferred stock, shares outstanding	0	543
Common stock, par value	$ 0.000006	$ 0.000006
Class A Common Stock
Common stock, shares authorized	5,000	4,141
Common stock, shares, issued	949	117
Common stock, shares outstanding	949	117
Outstanding shares subject to repurchase	2	1
Class B Common Stock
Common stock, shares authorized	4,141	4,141
Common stock, shares, issued	1,217	1,213
Common stock, shares outstanding	1,217	1,213
Outstanding shares subject to repurchase	12	2