Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Apr. 28, 2012	Apr. 30, 2011
Cash flows from operating activities:
Net income	$ 6,124	$ 5,258
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other	1,816	1,813
Share-based compensation expense	1,032	1,237
Provision for doubtful accounts	20
Provision for doubtful accounts		(1)
Deferred income taxes	75	(37)
Excess tax benefits from share-based compensation	(57)	(65)
Net gains on investments	(38)	(185)
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable	660	603
Inventories	(113)	(105)
Financing receivables, net	(737)	(1,089)
Other assets	(495)	190
Accounts payable	34	(103)
Income taxes, net	151	(192)
Accrued compensation	(451)	(265)
Deferred revenue	482	537
Other liabilities	(100)	(341)
Net cash provided by operating activities	8,403	7,255
Cash flows from investing activities:
Purchases of investments	(32,690)	(30,303)
Proceeds from sales of investments	19,591	14,942
Proceeds from maturities of investments	7,930	14,134
Acquisition of property and equipment	(830)	(930)
Acquisition of businesses, net of cash and cash equivalents acquired	(333)	(266)
Purchases of investments in privately held companies	(299)	(179)
Return of investments in privately held companies	212	93
Other	175	48
Net cash used in investing activities	(6,244)	(2,461)
Cash flows from financing activities:
Issuances of common stock	1,115	1,516
Repurchases of common stock	(2,868)	(5,564)
Short-term borrowings, maturities less than 90 days, net	(505)	392
Issuances of debt, maturities greater than 90 days		4,109
Repayments of debt, maturities greater than 90 days		(3,000)
Excess tax benefits from share-based compensation	57	65
Dividends paid	(1,076)	(329)
Other	(83)	71
Net cash used in financing activities	(3,360)	(2,740)
Net (decrease) increase in cash and cash equivalents	(1,201)	2,054
Cash and cash equivalents, beginning of period	7,662	4,581
Cash and cash equivalents, end of period	6,461	6,635
Cash paid for:
Interest	561	658
Income taxes	$ 1,424	$ 1,328