CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Statement of Cash Flows [Abstract]
Cash, cash equivalents and restricted cash, beginning balances	$ 25,913	$ 20,289
Operating activities:
Net income	31,526	33,887
Adjustments to reconcile net income to cash generated by operating activities:
Depreciation and amortization	6,435	5,484
Share-based compensation expense	3,073	2,644
Deferred income tax benefit	(124)	(34,235)
Other	(215)	(151)
Changes in operating assets and liabilities:
Accounts receivable, net	8,094	3,523
Inventories	(1,006)	(2,807)
Vendor non-trade receivables	14,616	9,715
Other current and non-current assets	(717)	(1,053)
Accounts payable	(20,024)	(12,004)
Deferred revenue	(540)	394
Other current and non-current liabilities	(3,273)	38,026
Cash generated by operating activities	37,845	43,423
Investing activities:
Purchases of marketable securities	(13,854)	(48,449)
Proceeds from maturities of marketable securities	16,880	31,884
Proceeds from sales of marketable securities	22,635	38,942
Payments for acquisition of property, plant and equipment	(5,718)	(7,005)
Payments made in connection with business acquisitions, net	(291)	(305)
Purchases of non-marketable securities	(490)	(163)
Other	30	216
Cash generated by investing activities	19,192	15,120
Financing activities:
Proceeds from issuance of common stock	390	327
Payments for taxes related to net share settlement of equity awards	(1,427)	(1,190)
Payments for dividends and dividend equivalents	(7,011)	(6,529)
Repurchases of common stock	(32,498)	(32,851)
Proceeds from issuance of term debt, net	0	6,969
Repayments of term debt	(2,500)	(500)
Other	(87)	1
Cash used in financing activities	(43,133)	(33,773)
Increase in cash, cash equivalents and restricted cash	13,904	24,770
Cash, cash equivalents and restricted cash, ending balances	39,817	45,059
Supplemental cash flow disclosure:
Cash paid for income taxes, net	9,497	6,340
Cash paid for interest	$ 1,762	$ 1,356