Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities
Net income	$ 165	$ 191
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	52	39
Stock-based compensation expense	120	140
Acquisition-related items:
Amortization of purchased intangible assets	59	58
Impairments of long-lived assets	25	10
Gain on sale of assets and other	(49)	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	61	(11)
Inventory	(5)	4
Prepaid expenses and other assets	4	(34)
Accounts payable	(8)	109
Deferred revenue	115	(2)
Other accrued and long-term liabilities	67	(116)
Net cash provided by operating activities	606	388
Investing activities
Net purchases of property and equipment	(78)	(41)
Proceeds from sale of certain assets and other	90	0
Purchases of marketable securities	(477)	(619)
Proceeds from sales and maturities of marketable securities	503	539
Net cash provided by (used in) investing activities	38	(121)
Financing activities
Repurchases of Class A common stock	0	(107)
Dividends paid	(70)	(63)
Proceeds from issuance of common stock	54	68
Minimum tax withholding paid on behalf of employees for restricted stock units	(31)	(40)
Net cash used in financing activities	(47)	(142)
Increase in cash and cash equivalents	597	125
Cash and cash equivalents at beginning of period	1,657	1,617
Cash and cash equivalents at end of period	$ 2,254	$ 1,742