Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jan. 26, 2013	Jan. 28, 2012
Cash flows from operating activities:
Net income	$ 5,235	$ 3,959
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and other	1,223	1,185
Share-based compensation expense	608	695
Provision for receivables	12	43
Deferred income taxes	148	29
Excess tax benefits from share-based compensation	(32)	(32)
Net losses (gains) on investments	14	(11)
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable	100	761
Inventories	194	(194)
Financing receivables	(403)	(551)
Other assets	(63)	(505)
Accounts payable	(17)	(78)
Income taxes, net	(1,444)	146
Accrued compensation	(161)	(508)
Deferred revenue	407	304
Other liabilities	(7)	191
Net cash provided by operating activities	5,814	5,434
Cash flows from investing activities:
Purchases of investments	14,234	17,810
Proceeds from sales of investments	4,991	12,291
Proceeds from maturities of investments	8,652	4,039
Acquisition of property and equipment	(552)	(549)
Acquisition of businesses, net of cash and cash equivalents acquired	(6,035)	(109)
Purchases of investments in privately held companies	(116)	(231)
Return of Investments In Privately Held Companies	68	124
Other	30	160
Net cash used in investing activities	(7,196)	(2,085)
Cash flows from financing activities:
Issuances of common stock	652	653
Repurchases of stock- repurchase program	(645)	(2,210)
Stock repurchased for tax withholdings on vesting of restricted stock units, value	(212)	(145)
Short-term borrowings, maturities less than 90 days, net	4	17
Excess tax benefits from share-based compensation	32	32
Dividends paid	(1,487)	(644)
Other	86	(153)
Net cash used in financing activities	(1,570)	(2,450)
Net decrease in cash and cash equivalents	(2,952)	899
Cash and cash equivalents, beginning of period	9,799	7,662
Cash and cash equivalents, end of period	6,847	8,561
Cash paid for:
Interest	341	340
Income taxes	$ 1,472	$ 860