Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jan. 27, 2018	Jan. 28, 2017
Cash flows from operating activities:
Net income (loss)	$ (6,384)	$ 4,670
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization, and other	1,112	1,148
Share-based compensation expense	785	724
Provision for receivables	(43)	4
Deferred income taxes	1,021	(26)
Excess tax benefits from share-based compensation	0	(101)
(Gains) losses on divestitures, investments and other, net	(174)	79
Change in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable	1,236	1,396
Inventories	(276)	(51)
Financing receivables	(156)	(764)
Other assets	(15)	155
Accounts payable	(338)	(98)
Income taxes, net	10,246	(257)
Accrued compensation	(189)	(417)
Deferred revenue	237	611
Other liabilities	88	(571)
Net cash provided by operating activities	7,150	6,502
Cash flows from investing activities:
Purchases of investments	(13,954)	(27,847)
Proceeds from sales of investments	9,111	18,420
Proceeds from maturities of investments	7,365	5,245
Acquisition of businesses, net of cash and cash equivalents acquired	(754)	(251)
Proceeds from business divestitures	27	0
Purchases of investments in privately held companies	(89)	(142)
Return of investments in privately held companies	124	108
Acquisition of property and equipment	(379)	(526)
Proceeds from sales of property and equipment	51	5
Other	(7)	10
Net cash provided by (used in) investing activities	1,495	(4,978)
Cash flows from financing activities:
Issuances of common stock	302	386
Repurchases of common stock—repurchase program	(5,457)	(1,991)
Shares repurchased for tax withholdings on vesting of restricted stock units	(433)	(432)
Short-term borrowings, original maturities of 90 days or less, net	5,095	300
Issuances of debt	6,877	6,232
Repayments of debt	(6,230)	(1)
Excess tax benefits from share-based compensation	0	101
Dividends paid	(2,861)	(2,612)
Other	(22)	(240)
Net cash provided by (used in) financing activities	(2,729)	1,743
Net increase (decrease) in cash and cash equivalents	5,916	3,267
Cash and cash equivalents, beginning of period	11,708	7,631
Cash and cash equivalents, end of period	17,624	10,898
Supplemental cash flow information:
Cash paid for interest	454	419
Cash paid for income taxes, net	$ 1,311	$ 1,529