Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jan. 28, 2017	Jan. 23, 2016
Cash flows from operating activities:
Net income	$ 4,670	$ 5,577
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and other	1,148	1,005
Share-based compensation expense	724	706
Provision for receivables	4	31
Deferred income taxes	(26)	274
Excess tax benefits from share-based compensation	(101)	(82)
(Gains) losses on divestitures, investments and other, net	79	(260)
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable	1,396	988
Inventories	(51)	153
Financing receivables	(764)	(171)
Other assets	155	(181)
Accounts payable	(98)	(147)
Income taxes, net	(257)	(764)
Accrued compensation	(417)	(348)
Deferred revenue	611	69
Other liabilities	(571)	(162)
Net cash provided by operating activities	6,502	6,688
Cash flows from investing activities:
Purchases of investments	(27,847)	(19,089)
Proceeds from sales of investments	18,420	10,247
Proceeds from maturities of investments	5,245	7,955
Acquisition of businesses, net of cash and cash equivalents acquired	(251)	(1,089)
Proceeds from business divestiture	0	372
Purchases of investments in privately held companies	(142)	(166)
Return of investments in privately held companies	108	35
Acquisition of property and equipment	(526)	(576)
Proceeds from sales of property and equipment	5	11
Other	10	(87)
Net cash used in investing activities	(4,978)	(2,387)
Cash flows from financing activities:
Issuances of common stock	386	701
Repurchases of common stock—repurchase program	(1,991)	(2,344)
Shares repurchased for tax withholdings on vesting of restricted stock units	(432)	(412)
Short-term borrowings, original maturities less than 90 days, net	300	(4)
Issuances of debt	6,232	0
Repayments of debt	(1)	(862)
Excess tax benefits from share-based compensation	101	82
Dividends paid	(2,612)	(2,133)
Other	(240)	108
Net cash provided by (used in) financing activities	1,743	(4,864)
Net increase (decrease) in cash and cash equivalents	3,267	(563)
Cash and cash equivalents, beginning of period	7,631	6,877
Cash and cash equivalents, end of period	10,898	6,314
Supplemental cash flow information:
Cash paid for interest	419	426
Cash paid for income taxes, net	$ 1,529	$ 1,355