CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Statement of Cash Flows [Abstract]
Cash, cash equivalents and restricted cash, beginning balances	$ 50,224	$ 25,913
Operating activities:
Net income	44,738	41,570
Adjustments to reconcile net income to cash generated by operating activities:
Depreciation and amortization	8,354	9,368
Share-based compensation expense	5,105	4,569
Deferred income tax expense/(benefit)	182	(38)
Other	(94)	(340)
Changes in operating assets and liabilities:
Accounts receivable, net	5,149	9,013
Inventories	10	496
Vendor non-trade receivables	8,685	13,483
Other current and non-current assets	(6,760)	693
Accounts payable	(10,787)	(19,804)
Deferred revenue	1,649	(776)
Other current and non-current liabilities	3,867	(8,753)
Cash generated by operating activities	60,098	49,481
Investing activities:
Purchases of marketable securities	(96,606)	(21,902)
Proceeds from maturities of marketable securities	54,865	26,783
Proceeds from sales of marketable securities	39,760	49,516
Payments for acquisition of property, plant and equipment	(5,525)	(7,718)
Payments made in connection with business acquisitions, net	(1,473)	(611)
Purchases of non-marketable securities	(210)	(632)
Proceeds from non-marketable securities	58	1,526
Other	(689)	(268)
Cash generated by/(used in) investing activities	(9,820)	46,694
Financing activities:
Proceeds from issuance of common stock	430	391
Payments for taxes related to net share settlement of equity awards	(3,234)	(2,626)
Payments for dividends and dividend equivalents	(10,570)	(10,640)
Repurchases of common stock	(55,171)	(49,453)
Proceeds from issuance of term debt, net	10,635	0
Repayments of term debt	(12,629)	(5,500)
Proceeds from/(Repayments of) commercial paper, net	31	(2,026)
Proceeds from repurchase agreements	5,165	0
Other	(120)	(83)
Cash used in financing activities	(65,463)	(69,937)
Increase/(Decrease) in cash, cash equivalents and restricted cash	(15,185)	26,238
Cash, cash equivalents and restricted cash, ending balances	35,039	52,151
Supplemental cash flow disclosure:
Cash paid for income taxes, net	8,410	11,795
Cash paid for interest	$ 2,275	$ 2,563