CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 26, 2015
Statement of Cash Flows [Abstract]
Cash and cash equivalents, beginning of the period	$ 20,484	$ 21,120
Operating activities:
Net income	17,891	18,361
Adjustments to reconcile net income to cash generated by operating activities:
Depreciation and amortization	2,987	2,954
Share-based compensation expense	1,256	1,078
Deferred income tax expense	1,452	1,592
Other	(274)	110
Changes in operating assets and liabilities:
Accounts receivable, net	1,697	3,896
Inventories	(580)	(102)
Vendor non-trade receivables	(375)	1,826
Other current and non-current assets	(1,446)	(1,058)
Accounts payable	2,460	(852)
Deferred revenue	42	(29)
Other current and non-current liabilities	1,946	(313)
Cash generated by operating activities	27,056	27,463
Investing activities:
Purchases of marketable securities	(54,272)	(47,836)
Proceeds from maturities of marketable securities	6,525	3,514
Proceeds from sales of marketable securities	32,166	28,262
Payments made in connection with business acquisitions, net	(17)	(86)
Payments for acquisition of property, plant and equipment	(3,334)	(3,612)
Payments for acquisition of intangible assets	(86)	(394)
Payments for strategic investments	0	(126)
Other	(104)	(172)
Cash used in investing activities	(19,122)	(20,450)
Financing activities:
Proceeds from issuance of common stock	0	1
Excess tax benefits from equity awards	178	224
Payments for taxes related to net share settlement of equity awards	(629)	(597)
Payments for dividends and dividend equivalents	(3,130)	(2,969)
Repurchases of common stock	(10,851)	(6,863)
Change in commercial paper, net	2,385	(1,240)
Cash used in financing activities	(12,047)	(11,444)
Increase/(Decrease) in cash and cash equivalents	(4,113)	(4,431)
Cash and cash equivalents, end of the period	16,371	16,689
Supplemental cash flow disclosure:
Cash paid for income taxes, net	3,510	3,398
Cash paid for interest	$ 497	$ 396