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Consolidated Statements Of Cash Flows (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Oct. 27, 2012
Oct. 29, 2011
Cash flows from operating activities:    
Net income $ 2,092 $ 1,777
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, amortization, and other 612 621
Share-based compensation expense 306 341
Provision for doubtful accounts 29 (13)
Deferred income taxes 135 109
Excess tax benefits from share-based compensation (15) (21)
Net losses (gains) on investments 15 (13)
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:    
Accounts receivable 615 399
Inventories 42 (168)
Financing receivables (132) (9)
Other assets 99 (374)
Accounts payable (19) 36
Income taxes, net (372) (38)
Accrued compensation (359) (548)
Deferred revenue (295) 232
Other liabilities (288) 2
Net cash provided by operating activities 2,465 2,333
Cash flows from investing activities:    
Purchases of investments (8,213) (11,770)
Proceeds from sales of investments 2,447 7,721
Proceeds from maturities of investments 4,388 1,179
Acquisition of property and equipment (265) (265)
Acquisition of businesses, net of cash and cash equivalents acquired (4,912) (38)
Purchases of investments in privately held companies (9) (153)
Return of Investments In Privately Held Companies 12 58
Other 22 77
Net cash used in investing activities (6,530) (3,191)
Cash flows from financing activities:    
Issuances of common stock 117 203
Repurchases of stock- repurchase program (183) (1,744)
Stock Repurchased for tax withholdings on vesting of restricted stock units, value (203) (137)
Short-term borrowings, maturities less than 90 days, net 23 0
Excess Tax Benefit from Share-based Compensation, Financing Activities 15 21
Dividends paid (744) (322)
Other 14 (78)
Net cash used in financing activities (961) (2,057)
Net decrease in cash and cash equivalents (5,026) (2,915)
Cash and cash equivalents, beginning of fiscal year 9,799 7,662
Cash and cash equivalents, end of fiscal year 4,773 4,747
Cash paid for:    
Interest 221 220
Income taxes $ 776 $ 398