Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Oct. 29, 2016	Oct. 24, 2015
Cash flows from operating activities:
Net income	$ 2,322	$ 2,430
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and other	599	507
Share-based compensation expense	372	376
Provision for receivables	15	7
Deferred income taxes	158	193
Excess tax benefits from share-based compensation	(91)	(73)
(Gains) losses on investments and other, net	32	(4)
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable	1,049	631
Inventories	44	130
Financing receivables	(900)	(206)
Other assets	191	129
Accounts payable	(63)	4
Income taxes, net	(440)	(315)
Accrued compensation	(333)	(434)
Deferred revenue	462	(19)
Other liabilities	(687)	(590)
Net cash provided by operating activities	2,730	2,766
Cash flows from investing activities:
Purchases of investments	(18,667)	(10,823)
Proceeds from sales of investments	11,337	6,675
Proceeds from maturities of investments	2,449	4,133
Acquisition of businesses, net of cash and cash equivalents acquired	(251)	(614)
Purchases of investments in privately held companies	(38)	(78)
Return of investments in privately held companies	24	24
Acquisition of property and equipment	(275)	(262)
Proceeds from sales of property and equipment	2	6
Other	23	(11)
Net cash used in investing activities	(5,396)	(950)
Cash flows from financing activities:
Issuances of common stock	88	385
Repurchases of common stock—repurchase program	(1,023)	(1,210)
Shares repurchased for tax withholdings on vesting of restricted stock units	(401)	(382)
Short-term borrowings, original maturities less than 90 days, net	0	(4)
Issuances of debt	6,232	0
Repayments of debt	(1)	(852)
Excess tax benefits from share-based compensation	91	73
Dividends paid	(1,308)	(1,068)
Other	(60)	123
Net cash provided by (used in) financing activities	3,618	(2,935)
Net increase (decrease) in cash and cash equivalents	952	(1,119)
Cash and cash equivalents, beginning of period	7,631	6,877
Cash and cash equivalents, end of period	8,583	5,758
Supplemental cash flow information:
Cash paid for interest	248	264
Cash paid for income taxes, net	$ 913	$ 828