CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Statement of Cash Flows [Abstract]
Cash, cash equivalents and restricted cash, beginning balances	$ 25,913	$ 20,289
Operating activities:
Net income	41,570	45,406
Adjustments to reconcile net income to cash generated by operating activities:
Depreciation and amortization	9,368	8,149
Share-based compensation expense	4,569	3,995
Deferred income tax benefit	(38)	(33,109)
Other	(340)	(410)
Changes in operating assets and liabilities:
Accounts receivable, net	9,013	3,756
Inventories	496	(1,114)
Vendor non-trade receivables	13,483	5,536
Other current and non-current assets	693	(65)
Accounts payable	(19,804)	(10,410)
Deferred revenue	(776)	(73)
Other current and non-current liabilities	(8,753)	36,250
Cash generated by operating activities	49,481	57,911
Investing activities:
Purchases of marketable securities	(21,902)	(56,133)
Proceeds from maturities of marketable securities	26,783	46,290
Proceeds from sales of marketable securities	49,516	41,614
Payments for acquisition of property, plant and equipment	(7,718)	(10,272)
Payments made in connection with business acquisitions, net	(611)	(431)
Purchases of non-marketable securities	(632)	(1,788)
Proceeds from non-marketable securities	1,526	310
Other	(268)	(523)
Cash generated by investing activities	46,694	19,067
Financing activities:
Proceeds from issuance of common stock	391	328
Payments for taxes related to net share settlement of equity awards	(2,626)	(2,267)
Payments for dividends and dividend equivalents	(10,640)	(10,182)
Repurchases of common stock	(49,453)	(53,634)
Proceeds from issuance of term debt, net	0	6,969
Repayments of term debt	(5,500)	(6,500)
Repayments of commercial paper, net	(2,026)	(10)
Other	(83)	0
Cash used in financing activities	(69,937)	(65,296)
Increase in cash, cash equivalents and restricted cash	26,238	11,682
Cash, cash equivalents and restricted cash, ending balances	52,151	31,971
Supplemental cash flow disclosure:
Cash paid for income taxes, net	11,795	8,819
Cash paid for interest	$ 2,563	$ 2,120