Apple (AAPL) 10-Q 2 Feb 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares shares in Thousands	3 Months Ended
	Dec. 30, 2017	Jan. 19, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 30, 2017
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	AAPL
Entity Registrant Name	APPLE INC
Entity Central Index Key	320,193
Current Fiscal Year End Date	--09-29
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		5,074,013

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 88,293	$ 78,351
Cost of sales	54,381	48,175
Gross margin	33,912	30,176
Operating expenses:
Research and development	3,407	2,871
Selling, general and administrative	4,231	3,946
Total operating expenses	7,638	6,817
Operating income	26,274	23,359
Other income/(expense), net	756	821
Income before provision for income taxes	27,030	24,180
Provision for income taxes	6,965	6,289
Net income	$ 20,065	$ 17,891
Earnings per share:
Basic (in dollars per share)	$ 3.92	$ 3.38
Diluted (in dollars per share)	$ 3.89	$ 3.36
Shares used in computing earnings per share:
Basic (in shares)	5,112,877	5,298,661
Diluted (in shares)	5,157,787	5,327,995
Cash dividends declared per share (in dollars per share)	$ 0.63	$ 0.57

CONDENSED CONSOLIDATED STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 20,065	$ 17,891
Other comprehensive income/(loss):
Change in foreign currency translation, net of tax effects of $(1) and $76, respectively	40	(375)
Change in unrealized gains/losses on derivative instruments:
Change in fair value of derivatives, net of tax benefit/(expense) of $(66) and $(228), respectively	88	1,468
Adjustment for net (gains)/losses realized and included in net income, net of tax expense/(benefit) of $(21) and $(211), respectively	102	306
Total change in unrealized gains/losses on derivative instruments, net of tax	190	1,774
Change in unrealized gains/losses on marketable securities:
Change in fair value of marketable securities, net of tax benefit/(expense) of $464 and $989, respectively	(846)	(1,808)
Adjustment for net (gains)/losses realized and included in net income, net of tax expense/(benefit) of $41 and $(11), respectively	(75)	20
Total change in unrealized gains/losses on marketable securities, net of tax	(921)	(1,788)
Total other comprehensive income/(loss)	(691)	(389)
Total comprehensive income	$ 19,374	$ 17,502

CONDENSED CONSOLIDATED STATEME4

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Change in foreign currency translation, tax effects	$ (1)	$ 76
Change in fair value of derivatives, tax benefit/(expense)	(66)	(228)
Adjustment for net (gains)/losses realized and included in net income, tax expense/(benefit)	(21)	(211)
Change in fair value of marketable securities, tax benefit/(expense)	464	989
Adjustment for net (gains)/losses realized and included in net income, tax expense/(benefit)	$ 41	$ (11)

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Dec. 30, 2017	Sep. 30, 2017
Current assets:
Cash and cash equivalents	$ 27,491	$ 20,289
Short-term marketable securities	49,662	53,892
Accounts receivable, less allowances of $59 and $58, respectively	23,440	17,874
Inventories	4,421	4,855
Vendor non-trade receivables	27,459	17,799
Other current assets	11,337	13,936
Total current assets	143,810	128,645
Long-term marketable securities	207,944	194,714
Property, plant and equipment, net	33,679	33,783
Goodwill	5,889	5,717
Acquired intangible assets, net	2,149	2,298
Other non-current assets	13,323	10,162
Total assets	406,794	375,319
Current liabilities:
Accounts payable	62,985	49,049
Accrued expenses	26,281	25,744
Deferred revenue	8,044	7,548
Commercial paper	11,980	11,977
Current portion of long-term debt	6,498	6,496
Total current liabilities	115,788	100,814
Deferred revenue, non-current	3,131	2,836
Long-term debt	103,922	97,207
Other non-current liabilities	43,754	40,415
Total liabilities	266,595	241,272
Commitments and contingencies
Shareholders’ equity:
Common stock and additional paid-in capital, $0.00001 par value: 12,600,000 shares authorized; 5,081,651 and 5,126,201 shares issued and outstanding, respectively	36,447	35,867
Retained earnings	104,593	98,330
Accumulated other comprehensive income/(loss)	(841)	(150)
Total shareholders’ equity	140,199	134,047
Total liabilities and shareholders’ equity	$ 406,794	$ 375,319

CONDENSED CONSOLIDATED BALANCE6

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Millions	Dec. 30, 2017	Sep. 30, 2017
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 59	$ 58
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	12,600,000,000	12,600,000,000
Common stock, shares issued (in shares)	5,081,651,000	5,126,201,000
Common stock, shares outstanding (in shares)	5,081,651,000	5,126,201,000

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Statement of Cash Flows [Abstract]
Cash and cash equivalents, beginning of the period	$ 20,289	$ 20,484
Operating activities:
Net income	20,065	17,891
Adjustments to reconcile net income to cash generated by operating activities:
Depreciation and amortization	2,745	2,987
Share-based compensation expense	1,296	1,256
Deferred income tax expense/(benefit)	(33,737)	1,452
Other	(11)	(274)
Changes in operating assets and liabilities:
Accounts receivable, net	(5,570)	1,697
Inventories	434	(580)
Vendor non-trade receivables	(9,660)	(375)
Other current and non-current assets	(197)	(1,446)
Accounts payable	14,588	2,460
Deferred revenue	791	42
Other current and non-current liabilities	37,549	2,124
Cash generated by operating activities	28,293	27,234
Investing activities:
Purchases of marketable securities	(41,272)	(54,272)
Proceeds from maturities of marketable securities	14,048	6,525
Proceeds from sales of marketable securities	16,801	32,166
Payments made in connection with business acquisitions, net	(173)	(17)
Payments for acquisition of property, plant and equipment	(2,810)	(3,334)
Payments for acquisition of intangible assets	(154)	(86)
Payments for strategic investments, net	(94)	0
Other	64	(104)
Cash used in investing activities	(13,590)	(19,122)
Financing activities:
Payments for taxes related to net share settlement of equity awards	(1,038)	(629)
Payments for dividends and dividend equivalents	(3,339)	(3,130)
Repurchases of common stock	(10,095)	(10,851)
Proceeds from issuance of term debt, net	6,969	0
Change in commercial paper, net	2	2,385
Cash used in financing activities	(7,501)	(12,225)
Increase/(Decrease) in cash and cash equivalents	7,202	(4,113)
Cash and cash equivalents, end of the period	27,491	16,371
Supplemental cash flow disclosure:
Cash paid for income taxes, net	3,551	3,510
Cash paid for interest	$ 623	$ 497

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Dec. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Apple Inc. and its wholly-owned subsidiaries (collectively “Apple” or the “Company”) designs, manufactures and markets mobile communication and media devices and personal computers, and sells a variety of related software, services, accessories, networking solutions and third-party digital content and applications. The Company’s products and services include iPhone ® , iPad ® , Mac ® , Apple Watch ® , Apple TV ® , a portfolio of consumer and professional software applications, iOS, macOS ® , watchOS ® and tvOS™ operating systems, iCloud ® , Apple Pay ® and a variety of accessory, service and support offerings. The Company sells and delivers digital content and applications through the iTunes Store ® , App Store ® , Mac App Store, TV App Store, iBooks Store ® and Apple Music ® (collectively “Digital Content and Services”). The Company sells its products worldwide through its retail stores, online stores and direct sales force, as well as through third-party cellular network carriers, wholesalers, retailers and resellers. In addition, the Company sells a variety of third-party Apple-compatible products, including application software and various accessories through its retail and online stores. The Company sells to consumers, small and mid-sized businesses and education, enterprise and government customers. Basis of Presentation and Preparation The accompanying condensed consolidated financial statements include the accounts of the Company. Intercompany accounts and transactions have been eliminated. In the opinion of the Company’s management, the condensed consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. The preparation of these condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. Certain prior period amounts in the condensed consolidated financial statements and accompanying notes have been reclassified to conform to the current period’s presentation. These condensed consolidated financial statements and accompanying notes should be read in conjunction with the Company’s annual consolidated financial statements and the notes thereto included in its Annual Report on Form 10-K for the fiscal year ended September 30, 2017 (the “ 2017 Form 10-K”). The Company’s fiscal year is the 52- or 53-week period that ends on the last Saturday of September. The first quarter of 2018 spanned 13 weeks, whereas a 14th week was added to the first fiscal quarter of 2017, as is done every five or six years, to realign the Company’s fiscal quarters with calendar quarters. Unless otherwise stated, references to particular years, quarters, months and periods refer to the Company’s fiscal years ended in September and the associated quarters, months and periods of those fiscal years. Share-Based Compensation During the first quarter of 2018, the Company adopted the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Update (“ASU”) No. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”), which modified certain aspects of the accounting for share-based payment transactions, including income taxes, classification of awards and classification in the statement of cash flows. Historically, excess tax benefits or deficiencies from the Company’s equity awards were recorded as additional paid-in capital in its Condensed Consolidated Balance Sheets and were classified as a financing activity in its Condensed Consolidated Statements of Cash Flows. As a result of adoption, the Company will prospectively record any excess tax benefits or deficiencies from its equity awards as part of its provision for income taxes in its Condensed Consolidated Statements of Operations in the reporting periods in which equity vesting occurs. The Company elected to apply the cash flow classification requirements related to excess tax benefits retrospectively to all periods presented, which resulted in an increase to cash generated by operating activities in the Condensed Consolidated Statements of Cash Flows of $178 million for the three months ended December 31, 2016. Earnings Per Share Basic earnings per share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include unvested restricted stock units (“RSUs”), unvested restricted stock, outstanding stock options and shares to be purchased by employees under the Company’s employee stock purchase plan. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities. The following table shows the computation of basic and diluted earnings per share for the three months ended December 30, 2017 and December 31, 2016 (net income in millions and shares in thousands): Three Months Ended December 30, December 31, Numerator: Net income $ 20,065 $ 17,891 Denominator: Weighted-average shares outstanding 5,112,877 5,298,661 Effect of dilutive securities 44,910 29,334 Weighted-average diluted shares 5,157,787 5,327,995 Basic earnings per share $ 3.92 $ 3.38 Diluted earnings per share $ 3.89 $ 3.36 Potentially dilutive securities whose effect would have been antidilutive are excluded from the computation of diluted earnings per share.

Financial Instruments

Financial Instruments	3 Months Ended
	Dec. 30, 2017
Investments, All Other Investments [Abstract]
Financial Instruments	Financial Instruments Cash, Cash Equivalents and Marketable Securities The following tables show the Company’s cash and available-for-sale securities by significant investment category as of December 30, 2017 and September 30, 2017 (in millions): December 30, 2017 Adjusted Cost Unrealized Gains Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Marketable Securities Long-Term Marketable Securities Cash $ 9,529 $ — $ — $ 9,529 $ 9,529 $ — $ — Level 1 (1) : Money market funds 8,570 — — 8,570 8,570 — — Mutual funds 800 — (92 ) 708 — 708 — Subtotal 9,370 — (92 ) 9,278 8,570 708 — Level 2 (2) : U.S. Treasury securities 60,329 4 (502 ) 59,831 2,268 13,661 43,902 U.S. agency securities 5,384 — (22 ) 5,362 1,376 1,980 2,006 Non-U.S. government securities 8,651 206 (60 ) 8,797 — 223 8,574 Certificates of deposit and time deposits 6,307 — — 6,307 2,237 3,064 1,006 Commercial paper 5,384 — — 5,384 3,186 2,198 — Corporate securities 157,043 506 (681 ) 156,868 325 27,252 129,291 Municipal securities 971 — (8 ) 963 — 110 853 Mortgage- and asset-backed securities 23,052 17 (291 ) 22,778 — 466 22,312 Subtotal 267,121 733 (1,564 ) 266,290 9,392 48,954 207,944 Total $ 286,020 $ 733 $ (1,656 ) $ 285,097 $ 27,491 $ 49,662 $ 207,944 September 30, 2017 Adjusted Cost Unrealized Gains Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Marketable Securities Long-Term Marketable Securities Cash $ 7,982 $ — $ — $ 7,982 $ 7,982 $ — $ — Level 1 (1) : Money market funds 6,534 — — 6,534 6,534 — — Mutual funds 799 — (88 ) 711 — 711 — Subtotal 7,333 — (88 ) 7,245 6,534 711 — Level 2 (2) : U.S. Treasury securities 55,254 58 (230 ) 55,082 865 17,228 36,989 U.S. agency securities 5,162 2 (9 ) 5,155 1,439 2,057 1,659 Non-U.S. government securities 7,827 210 (37 ) 8,000 9 123 7,868 Certificates of deposit and time deposits 5,832 — — 5,832 1,142 3,918 772 Commercial paper 3,640 — — 3,640 2,146 1,494 — Corporate securities 152,724 969 (242 ) 153,451 172 27,591 125,688 Municipal securities 961 4 (1 ) 964 — 114 850 Mortgage- and asset-backed securities 21,684 35 (175 ) 21,544 — 656 20,888 Subtotal 253,084 1,278 (694 ) 253,668 5,773 53,181 194,714 Total $ 268,399 $ 1,278 $ (782 ) $ 268,895 $ 20,289 $ 53,892 $ 194,714 (1) Level 1 fair value estimates are based on quoted prices in active markets for identical assets or liabilities. (2) Level 2 fair value estimates are based on observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. The Company may sell certain of its marketable securities prior to their stated maturities for strategic reasons including, but not limited to, anticipation of credit deterioration and duration management. The maturities of the Company’s long-term marketable securities generally range from one to five years . The Company considers the declines in market value of its marketable securities investment portfolio to be temporary in nature. The Company typically invests in highly rated securities, and its investment policy generally limits the amount of credit exposure to any one issuer. The policy generally requires investments to be investment grade, with the primary objective of minimizing the potential risk of principal loss. Fair values were determined for each individual security in the investment portfolio. When evaluating an investment for other-than-temporary impairment, the Company reviews factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer and any changes thereto, changes in market interest rates and the Company’s intent to sell, or whether it is more likely than not it will be required to sell the investment before recovery of the investment’s cost basis. As of December 30, 2017 , the Company does not consider any of its investments to be other-than-temporarily impaired. Derivative Financial Instruments The Company may use derivatives to partially offset its business exposure to foreign currency and interest rate risk on expected future cash flows, on net investments in certain foreign subsidiaries and on certain existing assets and liabilities. However, the Company may choose not to hedge certain exposures for a variety of reasons including, but not limited to, accounting considerations and the prohibitive economic cost of hedging particular exposures. There can be no assurance the hedges will offset more than a portion of the financial impact resulting from movements in foreign currency exchange or interest rates. To help protect gross margins from fluctuations in foreign currency exchange rates, certain of the Company’s subsidiaries whose functional currency is the U.S. dollar may hedge a portion of forecasted foreign currency revenue, and subsidiaries whose functional currency is not the U.S. dollar and who sell in local currencies may hedge a portion of forecasted inventory purchases not denominated in the subsidiaries’ functional currencies. The Company may enter into forward contracts, option contracts or other instruments to manage this risk and may designate these instruments as cash flow hedges. The Company typically hedges portions of its forecasted foreign currency exposure associated with revenue and inventory purchases, typically for up to 12 months . To help protect the net investment in a foreign operation from adverse changes in foreign currency exchange rates, the Company may enter into foreign currency forward and option contracts to offset the changes in the carrying amounts of these investments due to fluctuations in foreign currency exchange rates. In addition, the Company may use non-derivative financial instruments, such as its foreign currency-denominated debt, as economic hedges of its net investments in certain foreign subsidiaries. In both of these cases, the Company designates these instruments as net investment hedges. The Company may also enter into non-designated foreign currency contracts to partially offset the foreign currency exchange gains and losses generated by the remeasurement of certain assets and liabilities denominated in non-functional currencies. The Company may enter into interest rate swaps, options or other instruments to manage interest rate risk. These instruments may offset a portion of changes in income or expense, or changes in fair value of the Company’s term debt or investments. The Company designates these instruments as either cash flow or fair value hedges. The Company’s hedged interest rate transactions as of December 30, 2017 are expected to be recognized within 10 years . The Company may enter into foreign currency swaps to manage currency risk on its foreign currency-denominated term debt. These instruments may offset a portion of the foreign currency remeasurement gains or losses on the Company’s term debt and related interest payments. The Company designates these instruments as cash flow hedges. The Company’s hedged term debt-related foreign currency transactions as of December 30, 2017 are expected to be recognized within 25 years . Cash Flow Hedges The effective portions of cash flow hedges are recorded in accumulated other comprehensive income/(loss) (“AOCI”) until the hedged item is recognized in earnings. Deferred gains and losses associated with cash flow hedges of foreign currency revenue are recognized as a component of net sales in the same period as the related revenue is recognized, and deferred gains and losses related to cash flow hedges of inventory purchases are recognized as a component of cost of sales in the same period as the related costs are recognized. Deferred gains and losses associated with cash flow hedges of interest income or expense are recognized in other income/(expense), net in the same period as the related income or expense is recognized. The ineffective portions and amounts excluded from the effectiveness testing of cash flow hedges are recognized in other income/(expense), net. Derivative instruments designated as cash flow hedges must be de-designated as hedges when it is probable the forecasted hedged transaction will not occur in the initially identified time period or within a subsequent two-month time period. Deferred gains and losses in AOCI associated with such derivative instruments are reclassified into other income/(expense), net in the period of de-designation. Any subsequent changes in fair value of such derivative instruments are reflected in other income/(expense), net unless they are re-designated as hedges of other transactions. Net Investment Hedges The effective portions of net investment hedges are recorded in other comprehensive income/(loss) (“OCI”) as a part of the cumulative translation adjustment. The ineffective portions and amounts excluded from the effectiveness testing of net investment hedges are recognized in other income/(expense), net. Fair Value Hedges Gains and losses related to changes in fair value hedges are recognized in earnings along with a corresponding loss or gain related to the change in value of the underlying hedged item. Non-Designated Derivatives Derivatives that are not designated as hedging instruments are adjusted to fair value through earnings in the financial statement line item to which the derivative relates. Amounts recognized in earnings related to non-designated derivatives were not significant for the three -month period ended December 30, 2017 . During the three -month period ended December 31, 2016 , the Company recognized gains of $273 million , $332 million and $508 million in net sales, cost of sales and other income/(expense), net, respectively. The Company records all derivatives in the Condensed Consolidated Balance Sheets at fair value. The Company’s accounting treatment for these derivative instruments is based on its hedge designation. The following tables show the Company’s derivative instruments at gross fair value as of December 30, 2017 and September 30, 2017 (in millions): December 30, 2017 Fair Value of Derivatives Designated as Hedge Instruments Fair Value of Derivatives Not Designated as Hedge Instruments Total Fair Value Derivative assets (1) : Foreign exchange contracts $ 985 $ 284 $ 1,269 Interest rate contracts $ 100 $ — $ 100 Derivative liabilities (2) : Foreign exchange contracts $ 460 $ 283 $ 743 Interest rate contracts $ 462 $ — $ 462 September 30, 2017 Fair Value of Derivatives Designated as Hedge Instruments Fair Value of Derivatives Not Designated as Hedge Instruments Total Fair Value Derivative assets (1) : Foreign exchange contracts $ 1,049 $ 363 $ 1,412 Interest rate contracts $ 218 $ — $ 218 Derivative liabilities (2) : Foreign exchange contracts $ 759 $ 501 $ 1,260 Interest rate contracts $ 303 $ — $ 303 (1) The fair value of derivative assets is measured using Level 2 fair value inputs and is recorded as other current assets and other non-current assets in the Condensed Consolidated Balance Sheets. (2) The fair value of derivative liabilities is measured using Level 2 fair value inputs and is recorded as accrued expenses and other non-current liabilities in the Condensed Consolidated Balance Sheets. The following table shows the pre-tax gains and losses of the Company’s derivative and non-derivative instruments designated as cash flow, net investment and fair value hedges in OCI and the Condensed Consolidated Statements of Operations for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Gains/(Losses) recognized in OCI – effective portion: Cash flow hedges: Foreign exchange contracts $ 153 $ 1,727 Interest rate contracts 1 7 Total $ 154 $ 1,734 Net investment hedges: Foreign currency debt $ 2 $ 122 Gains/(Losses) reclassified from AOCI into net income – effective portion: Cash flow hedges: Foreign exchange contracts $ (124 ) $ (511 ) Interest rate contracts 1 (1 ) Total $ (123 ) $ (512 ) Gains/(Losses) on derivative instruments: Fair value hedges: Interest rate contracts $ (274 ) $ (872 ) Gains/(Losses) related to hedged items: Fair value hedges: Fixed-rate debt $ 274 $ 872 The following table shows the notional amounts of the Company’s outstanding derivative instruments and credit risk amounts associated with outstanding or unsettled derivative instruments as of December 30, 2017 and September 30, 2017 (in millions): December 30, 2017 September 30, 2017 Notional Amount Credit Risk Amount Notional Amount Credit Risk Amount Instruments designated as accounting hedges: Foreign exchange contracts $ 48,337 $ 985 $ 56,156 $ 1,049 Interest rate contracts $ 35,250 $ 100 $ 33,000 $ 218 Instruments not designated as accounting hedges: Foreign exchange contracts $ 77,059 $ 284 $ 69,774 $ 363 The notional amounts for outstanding derivative instruments provide one measure of the transaction volume outstanding and do not represent the amount of the Company’s exposure to credit or market loss. The credit risk amounts represent the Company’s gross exposure to potential accounting loss on derivative instruments that are outstanding or unsettled if all counterparties failed to perform according to the terms of the contract, based on then-current currency or interest rates at each respective date. The Company’s exposure to credit loss and market risk will vary over time as currency and interest rates change. Although the table above reflects the notional and credit risk amounts of the Company’s derivative instruments, it does not reflect the gains or losses associated with the exposures and transactions that the instruments are intended to hedge. The amounts ultimately realized upon settlement of these financial instruments, together with the gains and losses on the underlying exposures, will depend on actual market conditions during the remaining life of the instruments. The Company generally enters into master netting arrangements, which are designed to reduce credit risk by permitting net settlement of transactions with the same counterparty. To further limit credit risk, the Company generally enters into collateral security arrangements that provide for collateral to be received or posted when the net fair value of certain financial instruments fluctuates from contractually established thresholds. The Company presents its derivative assets and derivative liabilities at their gross fair values in its Condensed Consolidated Balance Sheets. The net cash collateral received by the Company related to derivative instruments under its collateral security arrangements was $230 million and $35 million as of December 30, 2017 and September 30, 2017 , respectively, which were recorded as accrued expenses in the Condensed Consolidated Balance Sheets. Under master netting arrangements with the respective counterparties to the Company’s derivative contracts, the Company is allowed to net settle transactions with a single net amount payable by one party to the other. As of December 30, 2017 and September 30, 2017 , the potential effects of these rights of set-off associated with the Company’s derivative contracts, including the effects of collateral, would be a reduction to both derivative assets and derivative liabilities of $1.3 billion and $1.4 billion , respectively, resulting in a net derivative liability of $66 million and a net derivative asset of $32 million , respectively. Accounts Receivable Trade Receivables The Company has considerable trade receivables outstanding with its third-party cellular network carriers, wholesalers, retailers, resellers, small and mid-sized businesses and education, enterprise and government customers. The Company generally does not require collateral from its customers; however, the Company will require collateral in certain instances to limit credit risk. In addition, when possible, the Company attempts to limit credit risk on trade receivables with credit insurance for certain customers or by requiring third-party financing, loans or leases to support credit exposure. These credit-financing arrangements are directly between the third-party financing company and the end customer. As such, the Company generally does not assume any recourse or credit risk sharing related to any of these arrangements. As of December 30, 2017 , the Company had one customer that represented 10% or more of total trade receivables, which accounted for 11% . As of September 30, 2017 , the Company had two customers that individually represented 10% or more of total trade receivables, each of which accounted for 10% . The Company’s cellular network carriers accounted for 57% and 59% of total trade receivables as of December 30, 2017 and September 30, 2017 , respectively. Vendor Non-Trade Receivables The Company has non-trade receivables from certain of its manufacturing vendors resulting from the sale of components to these vendors who manufacture sub-assemblies or assemble final products for the Company. The Company purchases these components directly from suppliers. As of December 30, 2017 , the Company had one vendor that represented 10% or more of total vendor non-trade receivables, which accounted for 66% . As of September 30, 2017 , the Company had three vendors that individually represented 10% or more of total vendor non-trade receivables, which accounted for 42% , 19% and 10% .

Condensed Consolidated Financia

Condensed Consolidated Financial Statement Details	3 Months Ended
	Dec. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidated Financial Statement Details	Condensed Consolidated Financial Statement Details The following tables show the Company’s condensed consolidated financial statement details as of December 30, 2017 and September 30, 2017 (in millions): Property, Plant and Equipment, Net December 30, September 30, Land and buildings $ 14,189 $ 13,587 Machinery, equipment and internal-use software 55,479 54,210 Leasehold improvements 7,442 7,279 Gross property, plant and equipment 77,110 75,076 Accumulated depreciation and amortization (43,431 ) (41,293 ) Total property, plant and equipment, net $ 33,679 $ 33,783 Other Non-Current Liabilities December 30, September 30, Long-term taxes payable $ 34,913 $ 257 Deferred tax liabilities 548 31,504 Other non-current liabilities 8,293 8,654 Total other non-current liabilities $ 43,754 $ 40,415 Other Income/(Expense), Net The following table shows the detail of other income/(expense), net for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Interest and dividend income $ 1,452 $ 1,224 Interest expense (734 ) (525 ) Other income, net 38 122 Total other income/(expense), net $ 756 $ 821

Acquired Intangible Assets

Acquired Intangible Assets	3 Months Ended
	Dec. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Intangible Assets	Acquired Intangible Assets The Company’s acquired intangible assets with definite useful lives primarily consist of patents and licenses. The following table summarizes the components of acquired intangible asset balances as of December 30, 2017 and September 30, 2017 (in millions): December 30, 2017 September 30, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived and amortizable acquired intangible assets $ 7,540 $ (5,491 ) $ 2,049 $ 7,507 $ (5,309 ) $ 2,198 Indefinite-lived and non-amortizable acquired intangible assets 100 — 100 100 — 100 Total acquired intangible assets $ 7,640 $ (5,491 ) $ 2,149 $ 7,607 $ (5,309 ) $ 2,298

Income Taxes

Income Taxes	3 Months Ended
	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “Act”), which significantly changed U.S. tax law. The Act lowered the Company’s U.S. statutory federal income tax rate from 35% to 21% effective January 1, 2018, while also imposing a deemed repatriation tax on deferred foreign income. The Act also created a new minimum tax on certain future foreign earnings. During the first quarter of 2018, the Company recognized a provision for income taxes of $7.0 billion , of which $2.6 billion was considered a provisional estimate under the U.S. Securities and Exchange Commission Staff Accounting Bulletin No. 118. The Company’s provisional estimate of $2.6 billion included $1.8 billion related to the impact of remeasuring the Company’s deferred tax balances to reflect the new tax rate and approximately $800 million , net, associated with the deemed repatriation tax. Deferred Tax Balances The Company remeasured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse. In addition, the Company elected to record certain deferred tax assets and liabilities related to the minimum tax on certain future foreign earnings. The provisional estimate of $1.8 billion incorporates assumptions made based upon the best available interpretation of the Act and may change as the Company receives additional clarification and implementation guidance. Deemed Repatriation Tax As of September 30, 2017, the Company had a U.S. deferred tax liability of $36.4 billion for deferred foreign income. As a result of the deemed repatriation tax, which is based on the Company’s total post-1986 deferred foreign income, the Company replaced $36.1 billion of its U.S. deferred tax liability with a provisional tax payable of $38.0 billion . The estimate of the deemed repatriation tax is based, in part, on the amount of cash and other specified assets anticipated to be held by the Company’s foreign subsidiaries as of September 29, 2018. As a result, the final amount may change as the amounts are finalized. The Company plans to pay the tax payable in installments in accordance with the Act. Unrecognized Tax Benefits As of December 30, 2017 , the Company recorded gross unrecognized tax benefits of $9.0 billion . These gross unrecognized tax benefits have been offset by certain tax deposits and a $1.1 billion reduction for the estimated impact of the deemed repatriation tax, with the net unrecognized tax benefits classified as other non-current liabilities in the Condensed Consolidated Balance Sheets. Upon recognition, $7.7 billion of the unrecognized tax benefits would affect the Company’s effective tax rate. The Company had $1.4 billion of gross interest and penalties accrued as of December 30, 2017 , which is also classified as other non-current liabilities in the Condensed Consolidated Balance Sheets. The Company believes that an adequate provision has been made for any adjustments that may result from tax examinations. However, the outcome of tax audits cannot be predicted with certainty. If any issues addressed in the Company’s tax audits are resolved in a manner inconsistent with its expectations, the Company could be required to adjust its provision for income taxes in the period such resolution occurs. Although timing of the resolution and/or closure of audits is not certain, the Company believes it is reasonably possible that its gross unrecognized tax benefits could decrease (whether by payment, release or a combination of both) in the next 12 months by as much as $2.9 billion . European Commission State Aid Decision On August 30, 2016, the European Commission announced its decision that Ireland granted state aid to the Company by providing tax opinions in 1991 and 2007 concerning the tax allocation of profits of the Irish branches of two subsidiaries of the Company (the “State Aid Decision”). The State Aid Decision orders Ireland to calculate and recover additional taxes from the Company for the period June 2003 through December 2014. Irish legislative changes, effective as of January 2015, eliminated the application of the tax opinions from that date forward. The Company believes the State Aid Decision to be without merit and appealed to the General Court of the Court of Justice of the European Union. Ireland has also appealed the State Aid Decision. Although Ireland is still computing the recovery amount, the Company expects the amount to be in line with the European Commission’s announced recovery amount of €13 billion , plus interest of €1 billion . Once the recovery amount is finalized by Ireland, the Company anticipates funding it by placing amounts into escrow in 2018, pending conclusion of all appeals. The Company believes that any incremental Irish corporate income taxes potentially due related to the State Aid Decision would be creditable against U.S. taxes.

Debt

Debt	3 Months Ended
	Dec. 30, 2017
Debt Disclosure [Abstract]
Debt	Debt Commercial Paper The Company issues unsecured short-term promissory notes (“Commercial Paper”) pursuant to a commercial paper program. The Company uses net proceeds from the commercial paper program for general corporate purposes, including dividends and share repurchases. As of both December 30, 2017 and September 30, 2017 , the Company had $12.0 billion of Commercial Paper outstanding with maturities generally less than nine months . The weighted-average interest rate of the Company’s Commercial Paper was 1.33% as of December 30, 2017 and 1.20% as of September 30, 2017 . The following table provides a summary of cash flows associated with the issuance and maturities of Commercial Paper for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Maturities less than 90 days: Proceeds from/(Repayments of) commercial paper, net $ 1,621 $ 1,550 Maturities greater than 90 days: Proceeds from commercial paper 3,441 2,544 Repayments of commercial paper (5,060 ) (1,709 ) Proceeds from/(Repayments of) commercial paper, net (1,619 ) 835 Total change in commercial paper, net $ 2 $ 2,385 Term Debt As of December 30, 2017 , the Company had outstanding floating- and fixed-rate notes with varying maturities for an aggregate principal amount of $111.0 billion (collectively the “Notes”). The Notes are senior unsecured obligations, and interest is payable in arrears, quarterly for the U.S. dollar-denominated and Australian dollar-denominated floating-rate notes, semi-annually for the U.S. dollar-denominated, Australian dollar-denominated, British pound-denominated, Japanese yen-denominated and Canadian dollar-denominated fixed-rate notes and annually for the euro-denominated and Swiss franc-denominated fixed-rate notes. The following table provides a summary of the Company’s term debt as of December 30, 2017 and September 30, 2017 : Maturities December 30, 2017 September 30, 2017 Amount (in millions) Effective Interest Rate Amount (in millions) Effective Interest Rate 2013 debt issuance of $17.0 billion: Floating-rate notes 2018 2018 $ 2,000 1.10% 1.10 % $ 2,000 1.10% 1.10 % Fixed-rate 1.000% – 3.850% notes 2018 – 2043 12,500 1.08% – 3.91 % 12,500 1.08% – 3.91 % 2014 debt issuance of $12.0 billion: Floating-rate notes 2019 2019 1,000 1.69% 1.69 % 1,000 1.61% 1.61 % Fixed-rate 2.100% – 4.450% notes 2019 – 2044 8,500 1.69% – 4.48 % 8,500 1.61% – 4.48 % 2015 debt issuances of $27.3 billion: Floating-rate notes 2019 – 2020 1,544 1.65% – 1.87 % 1,549 1.56% – 1.87 % Fixed-rate 0.350% – 4.375% notes 2019 – 2045 24,555 0.28% – 4.51 % 24,522 0.28% – 4.51 % 2016 debt issuances of $24.9 billion: Floating-rate notes 2019 – 2021 1,350 1.53% – 2.59 % 1,350 1.45% – 2.44 % Fixed-rate 1.100% – 4.650% notes 2018 – 2046 23,635 1.13% – 4.78 % 23,645 1.13% – 4.78 % 2017 debt issuances of $28.7 billion: Floating-rate notes 2019 – 2022 3,250 1.48% – 1.90 % 3,250 1.38% – 1.81 % Fixed-rate 0.875% – 4.300% notes 2019 – 2047 25,699 1.54% – 4.30 % 25,705 1.51% – 4.30 % First quarter 2018 debt issuance of $7.0 billion: Fixed-rate 1.800% notes 2019 1,000 1.83 % — — % Fixed-rate 2.000% notes 2020 1,000 2.03 % — — % Fixed-rate 2.400% notes 2023 750 1.93 % — — % Fixed-rate 2.750% notes 2025 1,500 2.77 % — — % Fixed-rate 3.000% notes 2027 1,500 2.13 % — — % Fixed-rate 3.750% notes 2047 1,250 3.80 % — — % Total term debt 111,033 104,021 Unamortized premium/(discount) and issuance costs, net (246 ) (225 ) Hedge accounting fair value adjustments (367 ) (93 ) Less: Current portion of long-term debt (6,498 ) (6,496 ) Total long-term debt $ 103,922 $ 97,207 To manage interest rate risk on certain of its U.S. dollar-denominated fixed- or floating-rate notes, the Company has entered into interest rate swaps to effectively convert the fixed interest rates to floating interest rates or the floating interest rates to fixed interest rates on a portion of these notes. Additionally, to manage foreign currency risk on certain of its foreign currency-denominated notes, the Company has entered into foreign currency swaps to effectively convert these notes to U.S. dollar-denominated notes. A portion of the Company’s Japanese yen-denominated notes is designated as a hedge of the foreign currency exposure of the Company’s net investment in a foreign operation. As of December 30, 2017 and September 30, 2017 , the carrying value of the debt designated as a net investment hedge was $1.4 billion and $1.6 billion , respectively. For further discussion regarding the Company’s use of derivative instruments see the Derivative Financial Instruments section of Note 2, “Financial Instruments.” The effective interest rates for the Notes include the interest on the Notes, amortization of the discount or premium and, if applicable, adjustments related to hedging. The Company recognized $695 million and $509 million of interest expense on its term debt for the three months ended December 30, 2017 and December 31, 2016 , respectively. As of December 30, 2017 and September 30, 2017 , the fair value of the Company’s Notes, based on Level 2 inputs, was $113.5 billion and $106.1 billion , respectively.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Dec. 30, 2017
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity Dividends The Company declared and paid cash dividends per share during the periods presented as follows: Dividends Per Share Amount (in millions) 2018: First quarter $ 0.63 $ 3,232 2017: Fourth quarter $ 0.63 $ 3,252 Third quarter 0.63 3,281 Second quarter 0.57 2,988 First quarter 0.57 3,042 Total cash dividends declared and paid $ 2.40 $ 12,563 Future dividends are subject to declaration by the Board of Directors. Share Repurchase Program In May 2017 , the Company’s Board of Directors increased the share repurchase authorization from $175 billion to $210 billion of the Company’s common stock, of which $176 billion had been utilized as of December 30, 2017 . The Company’s share repurchase program does not obligate it to acquire any specific number of shares. Under the program, shares may be repurchased in privately negotiated and/or open market transactions, including under plans complying with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The Company has entered, and in the future may enter, into accelerated share repurchase arrangements (“ASRs”) with financial institutions. In exchange for up-front payments, the financial institutions deliver shares of the Company’s common stock during the purchase periods of each ASR. The total number of shares ultimately delivered, and therefore the average repurchase price paid per share, is determined at the end of the applicable purchase period of each ASR based on the volume-weighted average price of the Company’s common stock during that period. The shares received are retired in the periods they are delivered, and the up-front payments are accounted for as a reduction to shareholders’ equity in the Company’s Condensed Consolidated Balance Sheets in the periods the payments are made. The Company reflects the ASRs as a repurchase of common stock in the period delivered for purposes of calculating earnings per share and as forward contracts indexed to its own common stock. The ASRs met all of the applicable criteria for equity classification, and therefore were not accounted for as derivative instruments. The following table shows the Company’s ASR activity and related information during the three months ended December 30, 2017 and the year ended September 30, 2017 : Purchase Period End Date Number of Shares (in thousands) Average Repurchase Price Per Share ASR Amount (in millions) November 2017 ASR February 2018 23,602 (1) (1) $ 5,000 August 2017 ASR November 2017 18,887 (2) $ 158.84 $ 3,000 May 2017 ASR August 2017 20,108 $ 149.20 $ 3,000 February 2017 ASR May 2017 20,949 $ 143.20 $ 3,000 November 2016 ASR February 2017 51,157 $ 117.29 $ 6,000 August 2016 ASR November 2016 26,850 $ 111.73 $ 3,000 (1) “Number of Shares” represents those shares delivered at the beginning of the purchase period and does not represent the final number of shares to be delivered under the ASR. The total number of shares ultimately delivered, and therefore the average repurchase price paid per share, will be determined at the end of the purchase period based on the volume-weighted average price of the Company’s common stock during that period. The November 2017 ASR purchase period will end in February 2018. (2) Includes 15.1 million shares delivered and retired at the beginning of the purchase period, which began in the fourth quarter of 2017, and 3.8 million shares delivered and retired at the end of the purchase period, which concluded in the first quarter of 2018. Additionally, the Company repurchased shares of its common stock in the open market, which were retired upon repurchase, during the periods presented as follows: Number of Shares (in thousands) Average Repurchase Price Per Share Amount (in millions) 2018: First quarter 30,181 $ 169.26 $ 5,109 2017: Fourth quarter 29,073 $ 154.78 $ 4,500 Third quarter 30,356 $ 148.24 4,500 Second quarter 31,070 $ 128.74 4,001 First quarter 44,333 $ 112.78 5,000 Total open market common stock repurchases 134,832 $ 18,001

Comprehensive Income

Comprehensive Income	3 Months Ended
	Dec. 30, 2017
Equity [Abstract]
Comprehensive Income	Comprehensive Income Comprehensive income consists of two components, net income and OCI. OCI refers to revenue, expenses, and gains and losses that under GAAP are recorded as an element of shareholders’ equity but are excluded from net income. The Company’s OCI consists of foreign currency translation adjustments from those subsidiaries not using the U.S. dollar as their functional currency, net deferred gains and losses on certain derivative instruments accounted for as cash flow hedges and unrealized gains and losses on marketable securities classified as available-for-sale. The following table shows the pre-tax amounts reclassified from AOCI into the Condensed Consolidated Statements of Operations, and the associated financial statement line item, for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended Comprehensive Income Components Financial Statement Line Item December 30, December 31, Unrealized (gains)/losses on derivative instruments: Foreign exchange contracts Net sales $ 184 $ (101 ) Cost of sales (27 ) 13 Other income/(expense), net (33 ) 604 Interest rate contracts Other income/(expense), net (1 ) 1 123 517 Unrealized (gains)/losses on marketable securities Other income/(expense), net (116 ) 31 Total amounts reclassified from AOCI $ 7 $ 548 The following table shows the changes in AOCI by component for the three months ended December 30, 2017 (in millions): Cumulative Foreign Currency Translation Unrealized Gains/Losses on Derivative Instruments Unrealized Gains/Losses on Marketable Securities Total Balances as of September 30, 2017 $ (354 ) $ (124 ) $ 328 $ (150 ) Other comprehensive income/(loss) before reclassifications 41 154 (1,310 ) (1,115 ) Amounts reclassified from AOCI — 123 (116 ) 7 Tax effect (1 ) (87 ) 505 417 Other comprehensive income/(loss) 40 190 (921 ) (691 ) Balances as of December 30, 2017 $ (314 ) $ 66 $ (593 ) $ (841 )

Benefit Plans

Benefit Plans	3 Months Ended
	Dec. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Benefit Plans	Benefit Plans Stock Plans The Company had 273.4 million shares reserved for future issuance under its stock plans as of December 30, 2017 . RSUs granted generally vest over four years , based on continued employment, and are settled upon vesting in shares of the Company’s common stock on a one -for-one basis. Each share issued with respect to RSUs granted under the Company’s stock plans reduces the number of shares available for grant under the plan by two shares. RSUs canceled and shares withheld to satisfy tax withholding obligations increase the number of shares available for grant under the plans utilizing a factor of two times the number of RSUs canceled or shares withheld. Rule 10b5-1 Trading Plans During the three months ended December 30, 2017 , Section 16 officers Angela Ahrendts, Timothy D. Cook, Luca Maestri, Daniel Riccio and Philip Schiller had equity trading plans in place in accordance with Rule 10b5-1(c)(1) under the Exchange Act. An equity trading plan is a written document that pre-establishes the amounts, prices and dates (or formula for determining the amounts, prices and dates) of future purchases or sales of the Company’s stock, including shares acquired pursuant to the Company’s employee and director equity plans. Restricted Stock Units A summary of the Company’s RSU activity and related information for the three months ended December 30, 2017 is as follows: Number of RSUs (in thousands) Weighted-Average Grant Date Fair Value Per Share Aggregate Fair Value (in millions) Balance as of September 30, 2017 97,571 $ 110.33 RSUs granted 35,853 $ 157.49 RSUs vested (19,741 ) $ 102.40 RSUs canceled (1,316 ) $ 121.76 Balance as of December 30, 2017 112,367 $ 126.64 $ 19,016 The fair value as of the respective vesting dates of RSUs was $3.1 billion and $2.2 billion for the three months ended December 30, 2017 and December 31, 2016 , respectively. Share-Based Compensation The following table shows a summary of the share-based compensation expense included in the Condensed Consolidated Statements of Operations for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Cost of sales $ 252 $ 229 Research and development 646 589 Selling, general and administrative 398 438 Total share-based compensation expense $ 1,296 $ 1,256 The income tax benefit related to share-based compensation expense was $631 million and $465 million for the three months ended December 30, 2017 and December 31, 2016 , respectively. As of December 30, 2017 , the total unrecognized compensation cost related to outstanding RSUs, restricted stock and stock options was $12.1 billion , which the Company expects to recognize over a weighted-average period of 2.9 years .

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Dec. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Accrued Warranty and Indemnification The following table shows changes in the Company’s accrued warranties and related costs for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Beginning accrued warranty and related costs $ 3,834 $ 3,702 Cost of warranty claims (982 ) (1,337 ) Accruals for product warranty 1,471 2,333 Ending accrued warranty and related costs $ 4,323 $ 4,698 Agreements entered into by the Company sometimes include indemnification provisions which may subject the Company to costs and damages in the event of a claim against an indemnified third party. In the opinion of management, there was not at least a reasonable possibility the Company may have incurred a material loss, or a material loss in excess of a recorded accrual, with respect to indemnification of third parties. The Company offers an iPhone Upgrade Program, which is available to customers who purchase a qualifying iPhone in the U.S., the U.K. and mainland China. The iPhone Upgrade Program provides customers the right to trade in that iPhone for a specified amount when purchasing a new iPhone, provided certain conditions are met. The Company accounts for the trade-in right as a guarantee liability and recognizes arrangement revenue net of the fair value of such right, with subsequent changes to the guarantee liability recognized within revenue. The Company has entered into indemnification agreements with its directors and executive officers. Under these agreements, the Company has agreed to indemnify such individuals to the fullest extent permitted by law against liabilities that arise by reason of their status as directors or officers of the Company and to advance expenses incurred by such individuals in connection with related legal proceedings. It is not possible to determine the maximum potential amount of payments the Company could be required to make under these agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each claim. While the Company maintains directors and officers liability insurance coverage, such insurance coverage may be insufficient to cover all losses or all types of claims that may arise. Concentrations in the Available Sources of Supply of Materials and Product Although most components essential to the Company’s business are generally available from multiple sources, a few components are currently obtained from single or limited sources. In addition, the Company competes for various components with other participants in the markets for mobile communication and media devices and personal computers. Therefore, many components used by the Company, including those that are available from multiple sources, are at times subject to industry-wide shortage and significant pricing fluctuations that could materially adversely affect the Company’s financial condition and operating results. The Company uses some custom components that are not commonly used by its competitors, and new products introduced by the Company often utilize custom components available from only one source. When a component or product uses new technologies, initial capacity constraints may exist until the suppliers’ yields have matured or manufacturing capacity has increased. If the Company’s supply of components for a new or existing product were delayed or constrained, or if an outsourcing partner delayed shipments of completed products to the Company, the Company’s financial condition and operating results could be materially adversely affected. The Company’s business and financial performance could also be materially adversely affected depending on the time required to obtain sufficient quantities from the original source, or to identify and obtain sufficient quantities from an alternative source. Continued availability of these components at acceptable prices, or at all, may be affected if those suppliers decide to concentrate on the production of common components instead of components customized to meet the Company’s requirements. The Company has entered into agreements for the supply of many components; however, there can be no guarantee that the Company will be able to extend or renew these agreements on similar terms, or at all. Therefore, the Company remains subject to significant risks of supply shortages and price increases that could materially adversely affect its financial condition and operating results. Substantially all of the Company’s hardware products are manufactured by outsourcing partners that are located primarily in Asia, with some Mac computers manufactured in the U.S. and Ireland. A significant concentration of this manufacturing is currently performed by a small number of outsourcing partners, often in single locations. Certain of these outsourcing partners are the sole-sourced suppliers of components and manufacturers for many of the Company’s products. Although the Company works closely with its outsourcing partners on manufacturing schedules, the Company’s operating results could be adversely affected if its outsourcing partners were unable to meet their production commitments. The Company’s manufacturing purchase obligations typically cover its requirements for periods up to 150 days . Other Off-Balance Sheet Commitments Operating Leases The Company leases various equipment and facilities, including retail space, under noncancelable operating lease arrangements. The Company does not currently utilize any other off-balance sheet financing arrangements. As of December 30, 2017 , the Company’s total future minimum lease payments under noncancelable operating leases were $9.6 billion . The Company’s retail store and other facility leases typically have original terms not exceeding 10 years and generally contain multi-year renewal options. Unconditional Purchase Obligations The Company has entered into certain off-balance sheet arrangements which require the future purchase of goods or services (“Unconditional Purchase Obligations”). The Company’s Unconditional Purchase Obligations primarily consist of payments for supplier arrangements, internet and telecommunication services and intellectual property licenses. As of December 30, 2017 , the Company’s total future payments under noncancelable Unconditional Purchase Obligations having a remaining term in excess of one year were $8.7 billion . Contingencies The Company is subject to various legal proceedings and claims that have arisen in the ordinary course of business and that have not been fully adjudicated, as further discussed in Part II, Item 1 of this Form 10-Q under the heading “Legal Proceedings” and in Part II, Item 1A of this Form 10-Q under the heading “Risk Factors.” In the opinion of management, there was not at least a reasonable possibility the Company may have incurred a material loss, or a material loss in excess of a recorded accrual, with respect to loss contingencies for asserted legal and other claims. However, the outcome of litigation is inherently uncertain. Therefore, although management considers the likelihood of such an outcome to be remote, if one or more of these legal matters were resolved against the Company in a reporting period for amounts in excess of management’s expectations, the Company’s consolidated financial statements for that reporting period could be materially adversely affected. Apple Inc. v. Samsung Electronics Co., Ltd., et al. On August 24, 2012, a jury returned a verdict awarding the Company $1.05 billion in its lawsuit against Samsung Electronics Co., Ltd. and affiliated parties in the United States District Court, Northern District of California, San Jose Division. On March 6, 2014, the District Court entered final judgment in favor of the Company in the amount of approximately $930 million . On May 18, 2015, the U.S. Court of Appeals for the Federal Circuit affirmed in part, and reversed in part, the decision of the District Court. As a result, the Court of Appeals ordered entry of final judgment on damages in the amount of approximately $548 million , with the District Court to determine supplemental damages and interest, as well as damages owed for products subject to the reversal in part. Samsung paid $548 million to the Company in December 2015, which was included in net sales in the Condensed Consolidated Statement of Operations. On December 6, 2016, the U.S. Supreme Court remanded the case to the U.S. Court of Appeals for the Federal Circuit for further proceedings related to the $548 million in damages. On February 7, 2017, the U.S. Court of Appeals for the Federal Circuit remanded the case to the District Court to determine what additional proceedings, if any, are needed. On October 22, 2017, on remand from the U.S. Supreme Court, the District Court ordered a new trial on damages.

Segment Information and Geograp

Segment Information and Geographic Data	3 Months Ended
	Dec. 30, 2017
Segment Reporting [Abstract]
Segment Information and Geographic Data	Segment Information and Geographic Data The Company reports segment information based on the “management” approach. The management approach designates the internal reporting used by management for making decisions and assessing performance as the source of the Company’s reportable segments. The Company manages its business primarily on a geographic basis. The Company’s reportable segments consist of the Americas, Europe, Greater China, Japan and Rest of Asia Pacific. Americas includes both North and South America. Europe includes European countries, as well as India, the Middle East and Africa. Greater China includes China, Hong Kong and Taiwan. Rest of Asia Pacific includes Australia and those Asian countries not included in the Company’s other reportable segments. Although the reportable segments provide similar hardware and software products and similar services, each one is managed separately to better align with the location of the Company’s customers and distribution partners and the unique market dynamics of each geographic region. The accounting policies of the various segments are the same as those described in Note 1, “Summary of Significant Accounting Policies” of the Notes to Consolidated Financial Statements in Part II, Item 8 of the 2017 Form 10-K. The Company evaluates the performance of its reportable segments based on net sales and operating income. Net sales for geographic segments are generally based on the location of customers and sales through the Company’s retail stores located in those geographic locations. Operating income for each segment includes net sales to third parties, related cost of sales and operating expenses directly attributable to the segment. Advertising expenses are generally included in the geographic segment in which the expenditures are incurred. Operating income for each segment excludes other income and expense and certain expenses managed outside the reportable segments. Costs excluded from segment operating income include various corporate expenses such as research and development, corporate marketing expenses, certain share-based compensation expenses, income taxes, various nonrecurring charges and other separately managed general and administrative costs. The Company does not include intercompany transfers between segments for management reporting purposes. The following table shows information by reportable segment for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Americas: Net sales $ 35,193 $ 31,968 Operating income $ 11,316 $ 10,494 Europe: Net sales $ 21,054 $ 18,521 Operating income $ 6,893 $ 5,736 Greater China: Net sales $ 17,956 $ 16,233 Operating income $ 6,908 $ 6,176 Japan: Net sales $ 7,237 $ 5,766 Operating income $ 3,082 $ 2,673 Rest of Asia Pacific: Net sales $ 6,853 $ 5,863 Operating income $ 2,575 $ 2,229 A reconciliation of the Company’s segment operating income to the Condensed Consolidated Statements of Operations for the three months ended December 30, 2017 and December 31, 2016 is as follows (in millions): Three Months Ended December 30, December 31, Segment operating income $ 30,774 $ 27,308 Research and development expense (3,407 ) (2,871 ) Other corporate expenses, net (1,093 ) (1,078 ) Total operating income $ 26,274 $ 23,359

Summary of Significant Accoun19

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Dec. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation and Preparation	Basis of Presentation and Preparation The accompanying condensed consolidated financial statements include the accounts of the Company. Intercompany accounts and transactions have been eliminated. In the opinion of the Company’s management, the condensed consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. The preparation of these condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. Certain prior period amounts in the condensed consolidated financial statements and accompanying notes have been reclassified to conform to the current period’s presentation. These condensed consolidated financial statements and accompanying notes should be read in conjunction with the Company’s annual consolidated financial statements and the notes thereto included in its Annual Report on Form 10-K for the fiscal year ended September 30, 2017 (the “ 2017 Form 10-K”).
Fiscal Period	The Company’s fiscal year is the 52- or 53-week period that ends on the last Saturday of September. The first quarter of 2018 spanned 13 weeks, whereas a 14th week was added to the first fiscal quarter of 2017, as is done every five or six years, to realign the Company’s fiscal quarters with calendar quarters. Unless otherwise stated, references to particular years, quarters, months and periods refer to the Company’s fiscal years ended in September and the associated quarters, months and periods of those fiscal years.
Share-Based Compensation	Share-Based Compensation During the first quarter of 2018, the Company adopted the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Update (“ASU”) No. 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”), which modified certain aspects of the accounting for share-based payment transactions, including income taxes, classification of awards and classification in the statement of cash flows. Historically, excess tax benefits or deficiencies from the Company’s equity awards were recorded as additional paid-in capital in its Condensed Consolidated Balance Sheets and were classified as a financing activity in its Condensed Consolidated Statements of Cash Flows. As a result of adoption, the Company will prospectively record any excess tax benefits or deficiencies from its equity awards as part of its provision for income taxes in its Condensed Consolidated Statements of Operations in the reporting periods in which equity vesting occurs. The Company elected to apply the cash flow classification requirements related to excess tax benefits retrospectively to all periods presented, which resulted in an increase to cash generated by operating activities in the Condensed Consolidated Statements of Cash Flows of $178 million for the three months ended December 31, 2016.
Earnings Per Share	Earnings Per Share Basic earnings per share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include unvested restricted stock units (“RSUs”), unvested restricted stock, outstanding stock options and shares to be purchased by employees under the Company’s employee stock purchase plan. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities. Potentially dilutive securities whose effect would have been antidilutive are excluded from the computation of diluted earnings per share.
Fair Value Measurements	Level 1 fair value estimates are based on quoted prices in active markets for identical assets or liabilities. Level 2 fair value estimates are based on observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Derivative Financial Instruments	The Company records all derivatives in the Condensed Consolidated Balance Sheets at fair value. The Company’s accounting treatment for these derivative instruments is based on its hedge designation. Derivative Financial Instruments The Company may use derivatives to partially offset its business exposure to foreign currency and interest rate risk on expected future cash flows, on net investments in certain foreign subsidiaries and on certain existing assets and liabilities. However, the Company may choose not to hedge certain exposures for a variety of reasons including, but not limited to, accounting considerations and the prohibitive economic cost of hedging particular exposures. There can be no assurance the hedges will offset more than a portion of the financial impact resulting from movements in foreign currency exchange or interest rates. To help protect gross margins from fluctuations in foreign currency exchange rates, certain of the Company’s subsidiaries whose functional currency is the U.S. dollar may hedge a portion of forecasted foreign currency revenue, and subsidiaries whose functional currency is not the U.S. dollar and who sell in local currencies may hedge a portion of forecasted inventory purchases not denominated in the subsidiaries’ functional currencies. The Company may enter into forward contracts, option contracts or other instruments to manage this risk and may designate these instruments as cash flow hedges. The Company typically hedges portions of its forecasted foreign currency exposure associated with revenue and inventory purchases, typically for up to 12 months . To help protect the net investment in a foreign operation from adverse changes in foreign currency exchange rates, the Company may enter into foreign currency forward and option contracts to offset the changes in the carrying amounts of these investments due to fluctuations in foreign currency exchange rates. In addition, the Company may use non-derivative financial instruments, such as its foreign currency-denominated debt, as economic hedges of its net investments in certain foreign subsidiaries. In both of these cases, the Company designates these instruments as net investment hedges. The Company may also enter into non-designated foreign currency contracts to partially offset the foreign currency exchange gains and losses generated by the remeasurement of certain assets and liabilities denominated in non-functional currencies. The Company may enter into interest rate swaps, options or other instruments to manage interest rate risk. These instruments may offset a portion of changes in income or expense, or changes in fair value of the Company’s term debt or investments. The Company designates these instruments as either cash flow or fair value hedges. The Company’s hedged interest rate transactions as of December 30, 2017 are expected to be recognized within 10 years . The Company may enter into foreign currency swaps to manage currency risk on its foreign currency-denominated term debt. These instruments may offset a portion of the foreign currency remeasurement gains or losses on the Company’s term debt and related interest payments. The Company designates these instruments as cash flow hedges. The Company’s hedged term debt-related foreign currency transactions as of December 30, 2017 are expected to be recognized within 25 years . Cash Flow Hedges The effective portions of cash flow hedges are recorded in accumulated other comprehensive income/(loss) (“AOCI”) until the hedged item is recognized in earnings. Deferred gains and losses associated with cash flow hedges of foreign currency revenue are recognized as a component of net sales in the same period as the related revenue is recognized, and deferred gains and losses related to cash flow hedges of inventory purchases are recognized as a component of cost of sales in the same period as the related costs are recognized. Deferred gains and losses associated with cash flow hedges of interest income or expense are recognized in other income/(expense), net in the same period as the related income or expense is recognized. The ineffective portions and amounts excluded from the effectiveness testing of cash flow hedges are recognized in other income/(expense), net. Derivative instruments designated as cash flow hedges must be de-designated as hedges when it is probable the forecasted hedged transaction will not occur in the initially identified time period or within a subsequent two-month time period. Deferred gains and losses in AOCI associated with such derivative instruments are reclassified into other income/(expense), net in the period of de-designation. Any subsequent changes in fair value of such derivative instruments are reflected in other income/(expense), net unless they are re-designated as hedges of other transactions. Net Investment Hedges The effective portions of net investment hedges are recorded in other comprehensive income/(loss) (“OCI”) as a part of the cumulative translation adjustment. The ineffective portions and amounts excluded from the effectiveness testing of net investment hedges are recognized in other income/(expense), net. Fair Value Hedges Gains and losses related to changes in fair value hedges are recognized in earnings along with a corresponding loss or gain related to the change in value of the underlying hedged item. Non-Designated Derivatives Derivatives that are not designated as hedging instruments are adjusted to fair value through earnings in the financial statement line item to which the derivative relates.
Segment Reporting	The Company reports segment information based on the “management” approach. The management approach designates the internal reporting used by management for making decisions and assessing performance as the source of the Company’s reportable segments. The Company manages its business primarily on a geographic basis. The Company’s reportable segments consist of the Americas, Europe, Greater China, Japan and Rest of Asia Pacific. Americas includes both North and South America. Europe includes European countries, as well as India, the Middle East and Africa. Greater China includes China, Hong Kong and Taiwan. Rest of Asia Pacific includes Australia and those Asian countries not included in the Company’s other reportable segments. Although the reportable segments provide similar hardware and software products and similar services, each one is managed separately to better align with the location of the Company’s customers and distribution partners and the unique market dynamics of each geographic region. The accounting policies of the various segments are the same as those described in Note 1, “Summary of Significant Accounting Policies” of the Notes to Consolidated Financial Statements in Part II, Item 8 of the 2017 Form 10-K. The Company evaluates the performance of its reportable segments based on net sales and operating income. Net sales for geographic segments are generally based on the location of customers and sales through the Company’s retail stores located in those geographic locations. Operating income for each segment includes net sales to third parties, related cost of sales and operating expenses directly attributable to the segment. Advertising expenses are generally included in the geographic segment in which the expenditures are incurred. Operating income for each segment excludes other income and expense and certain expenses managed outside the reportable segments. Costs excluded from segment operating income include various corporate expenses such as research and development, corporate marketing expenses, certain share-based compensation expenses, income taxes, various nonrecurring charges and other separately managed general and administrative costs. The Company does not include intercompany transfers between segments for management reporting purposes.

Summary of Significant Accoun20

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Dec. 30, 2017
Accounting Policies [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table shows the computation of basic and diluted earnings per share for the three months ended December 30, 2017 and December 31, 2016 (net income in millions and shares in thousands): Three Months Ended December 30, December 31, Numerator: Net income $ 20,065 $ 17,891 Denominator: Weighted-average shares outstanding 5,112,877 5,298,661 Effect of dilutive securities 44,910 29,334 Weighted-average diluted shares 5,157,787 5,327,995 Basic earnings per share $ 3.92 $ 3.38 Diluted earnings per share $ 3.89 $ 3.36

Financial Instruments (Tables)

Financial Instruments (Tables)	3 Months Ended
	Dec. 30, 2017
Investments, All Other Investments [Abstract]
Cash and Available-for-Sale Securities by Significant Investment Category	The following tables show the Company’s cash and available-for-sale securities by significant investment category as of December 30, 2017 and September 30, 2017 (in millions): December 30, 2017 Adjusted Cost Unrealized Gains Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Marketable Securities Long-Term Marketable Securities Cash $ 9,529 $ — $ — $ 9,529 $ 9,529 $ — $ — Level 1 (1) : Money market funds 8,570 — — 8,570 8,570 — — Mutual funds 800 — (92 ) 708 — 708 — Subtotal 9,370 — (92 ) 9,278 8,570 708 — Level 2 (2) : U.S. Treasury securities 60,329 4 (502 ) 59,831 2,268 13,661 43,902 U.S. agency securities 5,384 — (22 ) 5,362 1,376 1,980 2,006 Non-U.S. government securities 8,651 206 (60 ) 8,797 — 223 8,574 Certificates of deposit and time deposits 6,307 — — 6,307 2,237 3,064 1,006 Commercial paper 5,384 — — 5,384 3,186 2,198 — Corporate securities 157,043 506 (681 ) 156,868 325 27,252 129,291 Municipal securities 971 — (8 ) 963 — 110 853 Mortgage- and asset-backed securities 23,052 17 (291 ) 22,778 — 466 22,312 Subtotal 267,121 733 (1,564 ) 266,290 9,392 48,954 207,944 Total $ 286,020 $ 733 $ (1,656 ) $ 285,097 $ 27,491 $ 49,662 $ 207,944 September 30, 2017 Adjusted Cost Unrealized Gains Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Marketable Securities Long-Term Marketable Securities Cash $ 7,982 $ — $ — $ 7,982 $ 7,982 $ — $ — Level 1 (1) : Money market funds 6,534 — — 6,534 6,534 — — Mutual funds 799 — (88 ) 711 — 711 — Subtotal 7,333 — (88 ) 7,245 6,534 711 — Level 2 (2) : U.S. Treasury securities 55,254 58 (230 ) 55,082 865 17,228 36,989 U.S. agency securities 5,162 2 (9 ) 5,155 1,439 2,057 1,659 Non-U.S. government securities 7,827 210 (37 ) 8,000 9 123 7,868 Certificates of deposit and time deposits 5,832 — — 5,832 1,142 3,918 772 Commercial paper 3,640 — — 3,640 2,146 1,494 — Corporate securities 152,724 969 (242 ) 153,451 172 27,591 125,688 Municipal securities 961 4 (1 ) 964 — 114 850 Mortgage- and asset-backed securities 21,684 35 (175 ) 21,544 — 656 20,888 Subtotal 253,084 1,278 (694 ) 253,668 5,773 53,181 194,714 Total $ 268,399 $ 1,278 $ (782 ) $ 268,895 $ 20,289 $ 53,892 $ 194,714 (1) Level 1 fair value estimates are based on quoted prices in active markets for identical assets or liabilities. (2) Level 2 fair value estimates are based on observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Derivative Instruments at Gross Fair Value	The following tables show the Company’s derivative instruments at gross fair value as of December 30, 2017 and September 30, 2017 (in millions): December 30, 2017 Fair Value of Derivatives Designated as Hedge Instruments Fair Value of Derivatives Not Designated as Hedge Instruments Total Fair Value Derivative assets (1) : Foreign exchange contracts $ 985 $ 284 $ 1,269 Interest rate contracts $ 100 $ — $ 100 Derivative liabilities (2) : Foreign exchange contracts $ 460 $ 283 $ 743 Interest rate contracts $ 462 $ — $ 462 September 30, 2017 Fair Value of Derivatives Designated as Hedge Instruments Fair Value of Derivatives Not Designated as Hedge Instruments Total Fair Value Derivative assets (1) : Foreign exchange contracts $ 1,049 $ 363 $ 1,412 Interest rate contracts $ 218 $ — $ 218 Derivative liabilities (2) : Foreign exchange contracts $ 759 $ 501 $ 1,260 Interest rate contracts $ 303 $ — $ 303 (1) The fair value of derivative assets is measured using Level 2 fair value inputs and is recorded as other current assets and other non-current assets in the Condensed Consolidated Balance Sheets. (2) The fair value of derivative liabilities is measured using Level 2 fair value inputs and is recorded as accrued expenses and other non-current liabilities in the Condensed Consolidated Balance Sheets.
Pre-Tax Gains and Losses of Derivative and Non-Derivative Instruments Designated as Cash Flow, Net Investment and Fair Value Hedges	The following table shows the pre-tax gains and losses of the Company’s derivative and non-derivative instruments designated as cash flow, net investment and fair value hedges in OCI and the Condensed Consolidated Statements of Operations for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Gains/(Losses) recognized in OCI – effective portion: Cash flow hedges: Foreign exchange contracts $ 153 $ 1,727 Interest rate contracts 1 7 Total $ 154 $ 1,734 Net investment hedges: Foreign currency debt $ 2 $ 122 Gains/(Losses) reclassified from AOCI into net income – effective portion: Cash flow hedges: Foreign exchange contracts $ (124 ) $ (511 ) Interest rate contracts 1 (1 ) Total $ (123 ) $ (512 ) Gains/(Losses) on derivative instruments: Fair value hedges: Interest rate contracts $ (274 ) $ (872 ) Gains/(Losses) related to hedged items: Fair value hedges: Fixed-rate debt $ 274 $ 872
Notional Amounts of Outstanding Derivative Instruments and Credit Risk Amounts Associated with Outstanding or Unsettled Derivative Instruments	The following table shows the notional amounts of the Company’s outstanding derivative instruments and credit risk amounts associated with outstanding or unsettled derivative instruments as of December 30, 2017 and September 30, 2017 (in millions): December 30, 2017 September 30, 2017 Notional Amount Credit Risk Amount Notional Amount Credit Risk Amount Instruments designated as accounting hedges: Foreign exchange contracts $ 48,337 $ 985 $ 56,156 $ 1,049 Interest rate contracts $ 35,250 $ 100 $ 33,000 $ 218 Instruments not designated as accounting hedges: Foreign exchange contracts $ 77,059 $ 284 $ 69,774 $ 363

Condensed Consolidated Financ22

Condensed Consolidated Financial Statement Details (Tables)	3 Months Ended
	Dec. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net December 30, September 30, Land and buildings $ 14,189 $ 13,587 Machinery, equipment and internal-use software 55,479 54,210 Leasehold improvements 7,442 7,279 Gross property, plant and equipment 77,110 75,076 Accumulated depreciation and amortization (43,431 ) (41,293 ) Total property, plant and equipment, net $ 33,679 $ 33,783
Other Non-Current Liabilities	Other Non-Current Liabilities December 30, September 30, Long-term taxes payable $ 34,913 $ 257 Deferred tax liabilities 548 31,504 Other non-current liabilities 8,293 8,654 Total other non-current liabilities $ 43,754 $ 40,415
Other Income/(Expense), Net	Other Income/(Expense), Net The following table shows the detail of other income/(expense), net for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Interest and dividend income $ 1,452 $ 1,224 Interest expense (734 ) (525 ) Other income, net 38 122 Total other income/(expense), net $ 756 $ 821

Acquired Intangible Assets (Tab

Acquired Intangible Assets (Tables)	3 Months Ended
	Dec. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Components of Acquired Intangible Asset Balances	The following table summarizes the components of acquired intangible asset balances as of December 30, 2017 and September 30, 2017 (in millions): December 30, 2017 September 30, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived and amortizable acquired intangible assets $ 7,540 $ (5,491 ) $ 2,049 $ 7,507 $ (5,309 ) $ 2,198 Indefinite-lived and non-amortizable acquired intangible assets 100 — 100 100 — 100 Total acquired intangible assets $ 7,640 $ (5,491 ) $ 2,149 $ 7,607 $ (5,309 ) $ 2,298

Debt (Tables)

Debt (Tables)	3 Months Ended
	Dec. 30, 2017
Debt Disclosure [Abstract]
Summary of Cash Flows Associated with Issuance and Maturities of Commercial Paper	The following table provides a summary of cash flows associated with the issuance and maturities of Commercial Paper for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Maturities less than 90 days: Proceeds from/(Repayments of) commercial paper, net $ 1,621 $ 1,550 Maturities greater than 90 days: Proceeds from commercial paper 3,441 2,544 Repayments of commercial paper (5,060 ) (1,709 ) Proceeds from/(Repayments of) commercial paper, net (1,619 ) 835 Total change in commercial paper, net $ 2 $ 2,385
Summary of Term Debt	The following table provides a summary of the Company’s term debt as of December 30, 2017 and September 30, 2017 : Maturities December 30, 2017 September 30, 2017 Amount (in millions) Effective Interest Rate Amount (in millions) Effective Interest Rate 2013 debt issuance of $17.0 billion: Floating-rate notes 2018 2018 $ 2,000 1.10% 1.10 % $ 2,000 1.10% 1.10 % Fixed-rate 1.000% – 3.850% notes 2018 – 2043 12,500 1.08% – 3.91 % 12,500 1.08% – 3.91 % 2014 debt issuance of $12.0 billion: Floating-rate notes 2019 2019 1,000 1.69% 1.69 % 1,000 1.61% 1.61 % Fixed-rate 2.100% – 4.450% notes 2019 – 2044 8,500 1.69% – 4.48 % 8,500 1.61% – 4.48 % 2015 debt issuances of $27.3 billion: Floating-rate notes 2019 – 2020 1,544 1.65% – 1.87 % 1,549 1.56% – 1.87 % Fixed-rate 0.350% – 4.375% notes 2019 – 2045 24,555 0.28% – 4.51 % 24,522 0.28% – 4.51 % 2016 debt issuances of $24.9 billion: Floating-rate notes 2019 – 2021 1,350 1.53% – 2.59 % 1,350 1.45% – 2.44 % Fixed-rate 1.100% – 4.650% notes 2018 – 2046 23,635 1.13% – 4.78 % 23,645 1.13% – 4.78 % 2017 debt issuances of $28.7 billion: Floating-rate notes 2019 – 2022 3,250 1.48% – 1.90 % 3,250 1.38% – 1.81 % Fixed-rate 0.875% – 4.300% notes 2019 – 2047 25,699 1.54% – 4.30 % 25,705 1.51% – 4.30 % First quarter 2018 debt issuance of $7.0 billion: Fixed-rate 1.800% notes 2019 1,000 1.83 % — — % Fixed-rate 2.000% notes 2020 1,000 2.03 % — — % Fixed-rate 2.400% notes 2023 750 1.93 % — — % Fixed-rate 2.750% notes 2025 1,500 2.77 % — — % Fixed-rate 3.000% notes 2027 1,500 2.13 % — — % Fixed-rate 3.750% notes 2047 1,250 3.80 % — — % Total term debt 111,033 104,021 Unamortized premium/(discount) and issuance costs, net (246 ) (225 ) Hedge accounting fair value adjustments (367 ) (93 ) Less: Current portion of long-term debt (6,498 ) (6,496 ) Total long-term debt $ 103,922 $ 97,207

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Dec. 30, 2017
Equity [Abstract]
Cash Dividends Declared and Paid Per Share	The Company declared and paid cash dividends per share during the periods presented as follows: Dividends Per Share Amount (in millions) 2018: First quarter $ 0.63 $ 3,232 2017: Fourth quarter $ 0.63 $ 3,252 Third quarter 0.63 3,281 Second quarter 0.57 2,988 First quarter 0.57 3,042 Total cash dividends declared and paid $ 2.40 $ 12,563
Accelerated Share Repurchase Activity and Related Information	The following table shows the Company’s ASR activity and related information during the three months ended December 30, 2017 and the year ended September 30, 2017 : Purchase Period End Date Number of Shares (in thousands) Average Repurchase Price Per Share ASR Amount (in millions) November 2017 ASR February 2018 23,602 (1) (1) $ 5,000 August 2017 ASR November 2017 18,887 (2) $ 158.84 $ 3,000 May 2017 ASR August 2017 20,108 $ 149.20 $ 3,000 February 2017 ASR May 2017 20,949 $ 143.20 $ 3,000 November 2016 ASR February 2017 51,157 $ 117.29 $ 6,000 August 2016 ASR November 2016 26,850 $ 111.73 $ 3,000 (1) “Number of Shares” represents those shares delivered at the beginning of the purchase period and does not represent the final number of shares to be delivered under the ASR. The total number of shares ultimately delivered, and therefore the average repurchase price paid per share, will be determined at the end of the purchase period based on the volume-weighted average price of the Company’s common stock during that period. The November 2017 ASR purchase period will end in February 2018. (2) Includes 15.1 million shares delivered and retired at the beginning of the purchase period, which began in the fourth quarter of 2017, and 3.8 million shares delivered and retired at the end of the purchase period, which concluded in the first quarter of 2018.
Repurchases of Common Shares in Open Market	Additionally, the Company repurchased shares of its common stock in the open market, which were retired upon repurchase, during the periods presented as follows: Number of Shares (in thousands) Average Repurchase Price Per Share Amount (in millions) 2018: First quarter 30,181 $ 169.26 $ 5,109 2017: Fourth quarter 29,073 $ 154.78 $ 4,500 Third quarter 30,356 $ 148.24 4,500 Second quarter 31,070 $ 128.74 4,001 First quarter 44,333 $ 112.78 5,000 Total open market common stock repurchases 134,832 $ 18,001

Comprehensive Income (Tables)

Comprehensive Income (Tables)	3 Months Ended
	Dec. 30, 2017
Equity [Abstract]
Pre-tax Amounts Reclassified from AOCI into Condensed Consolidated Statements of Operations	The following table shows the pre-tax amounts reclassified from AOCI into the Condensed Consolidated Statements of Operations, and the associated financial statement line item, for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended Comprehensive Income Components Financial Statement Line Item December 30, December 31, Unrealized (gains)/losses on derivative instruments: Foreign exchange contracts Net sales $ 184 $ (101 ) Cost of sales (27 ) 13 Other income/(expense), net (33 ) 604 Interest rate contracts Other income/(expense), net (1 ) 1 123 517 Unrealized (gains)/losses on marketable securities Other income/(expense), net (116 ) 31 Total amounts reclassified from AOCI $ 7 $ 548
Changes in AOCI by Component	The following table shows the changes in AOCI by component for the three months ended December 30, 2017 (in millions): Cumulative Foreign Currency Translation Unrealized Gains/Losses on Derivative Instruments Unrealized Gains/Losses on Marketable Securities Total Balances as of September 30, 2017 $ (354 ) $ (124 ) $ 328 $ (150 ) Other comprehensive income/(loss) before reclassifications 41 154 (1,310 ) (1,115 ) Amounts reclassified from AOCI — 123 (116 ) 7 Tax effect (1 ) (87 ) 505 417 Other comprehensive income/(loss) 40 190 (921 ) (691 ) Balances as of December 30, 2017 $ (314 ) $ 66 $ (593 ) $ (841 )

Benefit Plans (Tables)

Benefit Plans (Tables)	3 Months Ended
	Dec. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Restricted Stock Unit Activity	A summary of the Company’s RSU activity and related information for the three months ended December 30, 2017 is as follows: Number of RSUs (in thousands) Weighted-Average Grant Date Fair Value Per Share Aggregate Fair Value (in millions) Balance as of September 30, 2017 97,571 $ 110.33 RSUs granted 35,853 $ 157.49 RSUs vested (19,741 ) $ 102.40 RSUs canceled (1,316 ) $ 121.76 Balance as of December 30, 2017 112,367 $ 126.64 $ 19,016
Summary of Share-Based Compensation Expense	The following table shows a summary of the share-based compensation expense included in the Condensed Consolidated Statements of Operations for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Cost of sales $ 252 $ 229 Research and development 646 589 Selling, general and administrative 398 438 Total share-based compensation expense $ 1,296 $ 1,256

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Dec. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Changes in Accrued Warranties and Related Costs	The following table shows changes in the Company’s accrued warranties and related costs for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Beginning accrued warranty and related costs $ 3,834 $ 3,702 Cost of warranty claims (982 ) (1,337 ) Accruals for product warranty 1,471 2,333 Ending accrued warranty and related costs $ 4,323 $ 4,698

Segment Information and Geogr29

Segment Information and Geographic Data (Tables)	3 Months Ended
	Dec. 30, 2017
Segment Reporting [Abstract]
Summary Information by Reportable Segment	The following table shows information by reportable segment for the three months ended December 30, 2017 and December 31, 2016 (in millions): Three Months Ended December 30, December 31, Americas: Net sales $ 35,193 $ 31,968 Operating income $ 11,316 $ 10,494 Europe: Net sales $ 21,054 $ 18,521 Operating income $ 6,893 $ 5,736 Greater China: Net sales $ 17,956 $ 16,233 Operating income $ 6,908 $ 6,176 Japan: Net sales $ 7,237 $ 5,766 Operating income $ 3,082 $ 2,673 Rest of Asia Pacific: Net sales $ 6,853 $ 5,863 Operating income $ 2,575 $ 2,229
Reconciliation of Segment Operating Income to Condensed Consolidated Statements of Operations	A reconciliation of the Company’s segment operating income to the Condensed Consolidated Statements of Operations for the three months ended December 30, 2017 and December 31, 2016 is as follows (in millions): Three Months Ended December 30, December 31, Segment operating income $ 30,774 $ 27,308 Research and development expense (3,407 ) (2,871 ) Other corporate expenses, net (1,093 ) (1,078 ) Total operating income $ 26,274 $ 23,359

Summary of Significant Accoun30

Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	3 Months Ended
	Dec. 31, 2016USD ($)
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to cash provided by operating activities	$ 178

Summary of Significant Accoun31

Summary of Significant Accounting Policies - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Numerator:
Net income	$ 20,065	$ 17,891
Denominator:
Weighted-average shares outstanding (in shares)	5,112,877	5,298,661
Effect of dilutive securities (in shares)	44,910	29,334
Weighted-average diluted shares (in shares)	5,157,787	5,327,995
Basic earnings per share (in dollars per share)	$ 3.92	$ 3.38
Diluted earnings per share (in dollars per share)	$ 3.89	$ 3.36

Financial Instruments - Cash, C

Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions	Dec. 30, 2017	Sep. 30, 2017	Dec. 31, 2016	Sep. 24, 2016
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 286,020	$ 268,399
Unrealized Gains	733	1,278
Unrealized Losses	(1,656)	(782)
Fair Value	285,097	268,895
Cash and Cash Equivalents	27,491	20,289	$ 16,371	$ 20,484
Short-Term Marketable Securities	49,662	53,892
Long-Term Marketable Securities	207,944	194,714
Cash
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	9,529	7,982
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	9,529	7,982
Cash and Cash Equivalents	9,529	7,982
Short-Term Marketable Securities	0	0
Long-Term Marketable Securities	0	0
Level 1
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	9,370	7,333
Unrealized Gains	0	0
Unrealized Losses	(92)	(88)
Fair Value	9,278	7,245
Cash and Cash Equivalents	8,570	6,534
Short-Term Marketable Securities	708	711
Long-Term Marketable Securities	0	0
Level 1 | Money market funds
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	8,570	6,534
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	8,570	6,534
Cash and Cash Equivalents	8,570	6,534
Short-Term Marketable Securities	0	0
Long-Term Marketable Securities	0	0
Level 1 | Mutual funds
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	800	799
Unrealized Gains	0	0
Unrealized Losses	(92)	(88)
Fair Value	708	711
Cash and Cash Equivalents	0	0
Short-Term Marketable Securities	708	711
Long-Term Marketable Securities	0	0
Level 2
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	267,121	253,084
Unrealized Gains	733	1,278
Unrealized Losses	(1,564)	(694)
Fair Value	266,290	253,668
Cash and Cash Equivalents	9,392	5,773
Short-Term Marketable Securities	48,954	53,181
Long-Term Marketable Securities	207,944	194,714
Level 2 | U.S. Treasury securities
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	60,329	55,254
Unrealized Gains	4	58
Unrealized Losses	(502)	(230)
Fair Value	59,831	55,082
Cash and Cash Equivalents	2,268	865
Short-Term Marketable Securities	13,661	17,228
Long-Term Marketable Securities	43,902	36,989
Level 2 | U.S. agency securities
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	5,384	5,162
Unrealized Gains	0	2
Unrealized Losses	(22)	(9)
Fair Value	5,362	5,155
Cash and Cash Equivalents	1,376	1,439
Short-Term Marketable Securities	1,980	2,057
Long-Term Marketable Securities	2,006	1,659
Level 2 | Non-U.S. government securities
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	8,651	7,827
Unrealized Gains	206	210
Unrealized Losses	(60)	(37)
Fair Value	8,797	8,000
Cash and Cash Equivalents	0	9
Short-Term Marketable Securities	223	123
Long-Term Marketable Securities	8,574	7,868
Level 2 | Certificates of deposit and time deposits
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	6,307	5,832
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	6,307	5,832
Cash and Cash Equivalents	2,237	1,142
Short-Term Marketable Securities	3,064	3,918
Long-Term Marketable Securities	1,006	772
Level 2 | Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	5,384	3,640
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	5,384	3,640
Cash and Cash Equivalents	3,186	2,146
Short-Term Marketable Securities	2,198	1,494
Long-Term Marketable Securities	0	0
Level 2 | Corporate securities
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	157,043	152,724
Unrealized Gains	506	969
Unrealized Losses	(681)	(242)
Fair Value	156,868	153,451
Cash and Cash Equivalents	325	172
Short-Term Marketable Securities	27,252	27,591
Long-Term Marketable Securities	129,291	125,688
Level 2 | Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	971	961
Unrealized Gains	0	4
Unrealized Losses	(8)	(1)
Fair Value	963	964
Cash and Cash Equivalents	0	0
Short-Term Marketable Securities	110	114
Long-Term Marketable Securities	853	850
Level 2 | Mortgage- and asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	23,052	21,684
Unrealized Gains	17	35
Unrealized Losses	(291)	(175)
Fair Value	22,778	21,544
Cash and Cash Equivalents	0	0
Short-Term Marketable Securities	466	656
Long-Term Marketable Securities	$ 22,312	$ 20,888

Financial Instruments - Additio

Financial Instruments - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 30, 2017USD ($)VendorCustomer	Dec. 31, 2016USD ($)	Sep. 30, 2017USD ($)VendorCustomer
Financial Instruments [Line Items]
Maturities of long-term marketable securities, minimum	1 year
Maturities of long-term marketable securities, maximum	5 years
Hedged interest rate transactions, expected recognition period	10 years
Potential reduction to derivative assets resulting from rights of set-off under master netting arrangements	$ 1,300		$ 1,400
Potential reduction to derivative liabilities resulting from rights of set-off under master netting arrangements	1,300		1,400
Net derivative assets/(liabilities) after potential reductions under master netting arrangements	$ (66)		$ 32
Trade receivables | Credit concentration risk
Financial Instruments [Line Items]
Number of customers that individually represented 10% or more of total trade receivables | Customer	1		2
Trade receivables | Credit concentration risk | Customer one
Financial Instruments [Line Items]
Concentration risk, percentage	11.00%		10.00%
Trade receivables | Credit concentration risk | Customer two
Financial Instruments [Line Items]
Concentration risk, percentage			10.00%
Trade receivables | Credit concentration risk | Cellular network carriers
Financial Instruments [Line Items]
Concentration risk, percentage	57.00%		59.00%
Non-trade receivables | Credit concentration risk
Financial Instruments [Line Items]
Number of vendors that individually represented 10% or more of total vendor non-trade receivables | Vendor	1		3
Non-trade receivables | Credit concentration risk | Vendor one
Financial Instruments [Line Items]
Concentration risk, percentage	66.00%		42.00%
Non-trade receivables | Credit concentration risk | Vendor two
Financial Instruments [Line Items]
Concentration risk, percentage			19.00%
Non-trade receivables | Credit concentration risk | Vendor three
Financial Instruments [Line Items]
Concentration risk, percentage			10.00%
Accrued expenses
Financial Instruments [Line Items]
Net cash collateral received, derivative instruments	$ 230		$ 35
Derivatives not designated as accounting hedges | Net sales
Financial Instruments [Line Items]
Non-designated derivatives, fair value adjustment gains/(losses)		$ 273
Derivatives not designated as accounting hedges | Cost of sales
Financial Instruments [Line Items]
Non-designated derivatives, fair value adjustment gains/(losses)		332
Derivatives not designated as accounting hedges | Other income/(expense), net
Financial Instruments [Line Items]
Non-designated derivatives, fair value adjustment gains/(losses)		$ 508
Hedges of foreign currency exposure associated with revenue and inventory purchases
Financial Instruments [Line Items]
Hedged foreign currency transactions, expected recognition period	12 months
Hedges of foreign currency exposure associated with term debt
Financial Instruments [Line Items]
Hedged foreign currency transactions, expected recognition period	25 years

Financial Instruments - Derivat

Financial Instruments - Derivative Instruments at Gross Fair Value (Details) - Level 2 - USD ($) $ in Millions	Dec. 30, 2017	Sep. 30, 2017
Other current assets and other non-current assets | Foreign exchange contracts
Derivative assets:
Fair value of derivative assets	$ 1,269	$ 1,412
Other current assets and other non-current assets | Interest rate contracts
Derivative assets:
Fair value of derivative assets	100	218
Other current assets and other non-current assets | Derivatives designated as accounting hedges | Foreign exchange contracts
Derivative assets:
Fair value of derivative assets	985	1,049
Other current assets and other non-current assets | Derivatives designated as accounting hedges | Interest rate contracts
Derivative assets:
Fair value of derivative assets	100	218
Other current assets and other non-current assets | Derivatives not designated as accounting hedges | Foreign exchange contracts
Derivative assets:
Fair value of derivative assets	284	363
Other current assets and other non-current assets | Derivatives not designated as accounting hedges | Interest rate contracts
Derivative assets:
Fair value of derivative assets	0	0
Accrued expenses and other non-current liabilities | Foreign exchange contracts
Derivative liabilities:
Fair value of derivative liabilities	743	1,260
Accrued expenses and other non-current liabilities | Interest rate contracts
Derivative liabilities:
Fair value of derivative liabilities	462	303
Accrued expenses and other non-current liabilities | Derivatives designated as accounting hedges | Foreign exchange contracts
Derivative liabilities:
Fair value of derivative liabilities	460	759
Accrued expenses and other non-current liabilities | Derivatives designated as accounting hedges | Interest rate contracts
Derivative liabilities:
Fair value of derivative liabilities	462	303
Accrued expenses and other non-current liabilities | Derivatives not designated as accounting hedges | Foreign exchange contracts
Derivative liabilities:
Fair value of derivative liabilities	283	501
Accrued expenses and other non-current liabilities | Derivatives not designated as accounting hedges | Interest rate contracts
Derivative liabilities:
Fair value of derivative liabilities	$ 0	$ 0

Financial Instruments - Pre-Tax

Financial Instruments - Pre-Tax Gains and Losses of Derivative and Non-Derivative Instruments Designated as Hedges (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) recognized in OCI - effective portion	$ 154	$ 1,734
Gains/(Losses) reclassified from AOCI into net income - effective portion	(123)	(512)
Cash flow hedges | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) recognized in OCI - effective portion	153	1,727
Gains/(Losses) reclassified from AOCI into net income - effective portion	(124)	(511)
Cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) recognized in OCI - effective portion	1	7
Gains/(Losses) reclassified from AOCI into net income - effective portion	1	(1)
Net investment hedges | Foreign currency debt
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) recognized in OCI - effective portion	2	122
Fair value hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on derivative instruments	(274)	(872)
Gains/(Losses) related to hedged fixed-rate debt	$ 274	$ 872

Financial Instruments - Notiona

Financial Instruments - Notional Amounts and Credit Risk Amounts Associated with Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 30, 2017	Sep. 30, 2017
Derivatives designated as accounting hedges | Foreign exchange contracts
Derivative [Line Items]
Derivative, notional amount	$ 48,337	$ 56,156
Derivative, credit risk amount	985	1,049
Derivatives designated as accounting hedges | Interest rate contracts
Derivative [Line Items]
Derivative, notional amount	35,250	33,000
Derivative, credit risk amount	100	218
Derivatives not designated as accounting hedges | Foreign exchange contracts
Derivative [Line Items]
Derivative, notional amount	77,059	69,774
Derivative, credit risk amount	$ 284	$ 363

Condensed Consolidated Financ37

Condensed Consolidated Financial Statement Details - Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 30, 2017	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 77,110	$ 75,076
Accumulated depreciation and amortization	(43,431)	(41,293)
Total property, plant and equipment, net	33,679	33,783
Land and buildings
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	14,189	13,587
Machinery, equipment and internal-use software
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	55,479	54,210
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 7,442	$ 7,279

Condensed Consolidated Financ38

Condensed Consolidated Financial Statement Details - Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Dec. 30, 2017	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Long-term taxes payable	$ 34,913	$ 257
Deferred tax liabilities	548	31,504
Other non-current liabilities	8,293	8,654
Total other non-current liabilities	$ 43,754	$ 40,415

Condensed Consolidated Financ39

Condensed Consolidated Financial Statement Details - Other Income/(Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest and dividend income	$ 1,452	$ 1,224
Interest expense	(734)	(525)
Other income, net	38	122
Total other income/(expense), net	$ 756	$ 821

Acquired Intangible Assets - Co

Acquired Intangible Assets - Components of Gross and Net Intangible Asset Balances (Details) - USD ($) $ in Millions	Dec. 30, 2017	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Total acquired intangible assets, gross carrying amount	$ 7,640	$ 7,607
Definite-lived and amortizable acquired intangible assets, gross carrying amount	7,540	7,507
Definite-lived and amortizable acquired intangible assets, accumulated amortization	(5,491)	(5,309)
Definite-lived and amortizable acquired intangible assets, net carrying amount	2,049	2,198
Indefinite-lived and non-amortizable acquired intangible assets	100	100
Total acquired intangible assets, net carrying amount	$ 2,149	$ 2,298

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) $ in Millions, € in Billions	Jan. 01, 2018	Dec. 31, 2017	Aug. 30, 2016EUR (€)Subsidiary	Dec. 30, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2017USD ($)
Income Tax Contingency [Line Items]
U.S. statutory federal income tax rate	21.00%	35.00%
Provision for income taxes				$ 6,965	$ 6,289
Provision for income taxes related to the Act, provisional amount				2,600
Provision for income taxes related to remeasurement of deferred tax balances, provisional amount				1,800
Provision for income taxes related to deemed repatriation tax, provisional amount				800
Deferred tax liability for unremitted foreign earnings						$ 36,400
Deferred tax liability reversal				33,737	$ (1,452)
Deemed repatriation tax payable, provisional amount				38,000
Gross unrecognized tax benefits				9,000
Unrecognized tax benefits that would affect effective tax rate, if recognized				7,700
Unrecognized tax benefits, gross interest and penalties accrued				1,400
Reasonably possible decrease in gross unrecognized tax benefits over next 12 months				2,900
Unfavorable investigation outcome, EU State Aid rules
Income Tax Contingency [Line Items]
Number of subsidiaries impacted by European Commission tax ruling | Subsidiary			2
Maximum potential loss related to European Commission tax ruling | €			€ 13
Unfavorable investigation outcome, EU State Aid rules - interest component
Income Tax Contingency [Line Items]
Maximum potential loss related to European Commission tax ruling | €			€ 1
Tax Cuts and Jobs Act, deemed repatriation tax, related amount
Income Tax Contingency [Line Items]
Deferred tax liability reversal				36,100
Reduction of unrecognized tax benefits				$ 1,100

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Sep. 30, 2017
Debt Instrument [Line Items]
Commercial paper	$ 11,980		$ 11,977
Commercial paper, general maturity period (less than)	9 months
Commercial paper, weighted-average interest rate	1.33%		1.20%
Floating- and fixed-rate notes, aggregate principal amount	$ 111,033		$ 104,021
Interest expense on term debt	695	$ 509
Level 2
Debt Instrument [Line Items]
Floating- and fixed-rate notes, aggregate fair value	113,500		106,100
Net investment hedges
Debt Instrument [Line Items]
Carrying value of debt designated as a net investment hedge	$ 1,400		$ 1,600

Debt - Summary of Cash Flows As

Debt - Summary of Cash Flows Associated with Commercial Paper (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Maturities less than 90 days:
Proceeds from/(Repayments of) commercial paper, net	$ 1,621	$ 1,550
Maturities greater than 90 days:
Proceeds from commercial paper	3,441	2,544
Repayments of commercial paper	(5,060)	(1,709)
Proceeds from/(Repayments of) commercial paper, net	(1,619)	835
Total change in commercial paper, net	$ 2	$ 2,385

Debt - Summary of Term Debt (De

Debt - Summary of Term Debt (Details) - USD ($)	3 Months Ended
	Dec. 30, 2017	Sep. 30, 2017
Debt Instrument [Line Items]
Total term debt	$ 111,033,000,000	$ 104,021,000,000
Unamortized premium/(discount) and issuance costs, net	(246,000,000)	(225,000,000)
Hedge accounting fair value adjustments	(367,000,000)	(93,000,000)
Less: Current portion of long-term debt	(6,498,000,000)	(6,496,000,000)
Total long-term debt	103,922,000,000	97,207,000,000
2013 debt issuance of $17.0 billion
Debt Instrument [Line Items]
Debt instrument, face amount	17,000,000,000
2013 debt issuance of $17.0 billion | Floating-rate notes
Debt Instrument [Line Items]
Total term debt	$ 2,000,000,000	$ 2,000,000,000
Debt instrument, maturity year, start	2,018
Debt instrument, maturity year, end	2,018
2013 debt issuance of $17.0 billion | Floating-rate notes | Minimum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.10%	1.10%
2013 debt issuance of $17.0 billion | Floating-rate notes | Maximum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.10%	1.10%
2013 debt issuance of $17.0 billion | Fixed-rate 1.000% – 3.850% notes
Debt Instrument [Line Items]
Total term debt	$ 12,500,000,000	$ 12,500,000,000
Debt instrument, maturity year, start	2,018
Debt instrument, maturity year, end	2,043
2013 debt issuance of $17.0 billion | Fixed-rate 1.000% – 3.850% notes | Minimum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	1.00%
Debt instrument, effective interest rate	1.08%	1.08%
2013 debt issuance of $17.0 billion | Fixed-rate 1.000% – 3.850% notes | Maximum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	3.85%
Debt instrument, effective interest rate	3.91%	3.91%
2014 debt issuance of $12.0 billion
Debt Instrument [Line Items]
Debt instrument, face amount	$ 12,000,000,000
2014 debt issuance of $12.0 billion | Floating-rate notes
Debt Instrument [Line Items]
Total term debt	$ 1,000,000,000	$ 1,000,000,000
Debt instrument, maturity year, start	2,019
Debt instrument, maturity year, end	2,019
2014 debt issuance of $12.0 billion | Floating-rate notes | Minimum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.69%	1.61%
2014 debt issuance of $12.0 billion | Floating-rate notes | Maximum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.69%	1.61%
2014 debt issuance of $12.0 billion | Fixed-rate 2.100% – 4.450% notes
Debt Instrument [Line Items]
Total term debt	$ 8,500,000,000	$ 8,500,000,000
Debt instrument, maturity year, start	2,019
Debt instrument, maturity year, end	2,044
2014 debt issuance of $12.0 billion | Fixed-rate 2.100% – 4.450% notes | Minimum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	2.10%
Debt instrument, effective interest rate	1.69%	1.61%
2014 debt issuance of $12.0 billion | Fixed-rate 2.100% – 4.450% notes | Maximum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.45%
Debt instrument, effective interest rate	4.48%	4.48%
2015 debt issuances of $27.3 billion
Debt Instrument [Line Items]
Debt instrument, face amount	$ 27,300,000,000
2015 debt issuances of $27.3 billion | Floating-rate notes
Debt Instrument [Line Items]
Total term debt	$ 1,544,000,000	$ 1,549,000,000
Debt instrument, maturity year, start	2,019
Debt instrument, maturity year, end	2,020
2015 debt issuances of $27.3 billion | Floating-rate notes | Minimum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.65%	1.56%
2015 debt issuances of $27.3 billion | Floating-rate notes | Maximum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.87%	1.87%
2015 debt issuances of $27.3 billion | Fixed-rate 0.350% – 4.375% notes
Debt Instrument [Line Items]
Total term debt	$ 24,555,000,000	$ 24,522,000,000
Debt instrument, maturity year, start	2,019
Debt instrument, maturity year, end	2,045
2015 debt issuances of $27.3 billion | Fixed-rate 0.350% – 4.375% notes | Minimum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	0.35%
Debt instrument, effective interest rate	0.28%	0.28%
2015 debt issuances of $27.3 billion | Fixed-rate 0.350% – 4.375% notes | Maximum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.375%
Debt instrument, effective interest rate	4.51%	4.51%
2016 debt issuances of $24.9 billion
Debt Instrument [Line Items]
Debt instrument, face amount	$ 24,900,000,000
2016 debt issuances of $24.9 billion | Floating-rate notes
Debt Instrument [Line Items]
Total term debt	$ 1,350,000,000	$ 1,350,000,000
Debt instrument, maturity year, start	2,019
Debt instrument, maturity year, end	2,021
2016 debt issuances of $24.9 billion | Floating-rate notes | Minimum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.53%	1.45%
2016 debt issuances of $24.9 billion | Floating-rate notes | Maximum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	2.59%	2.44%
2016 debt issuances of $24.9 billion | Fixed-rate 1.100% – 4.650% notes
Debt Instrument [Line Items]
Total term debt	$ 23,635,000,000	$ 23,645,000,000
Debt instrument, maturity year, start	2,018
Debt instrument, maturity year, end	2,046
2016 debt issuances of $24.9 billion | Fixed-rate 1.100% – 4.650% notes | Minimum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	1.10%
Debt instrument, effective interest rate	1.13%	1.13%
2016 debt issuances of $24.9 billion | Fixed-rate 1.100% – 4.650% notes | Maximum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.65%
Debt instrument, effective interest rate	4.78%	4.78%
2017 debt issuances of $28.7 billion
Debt Instrument [Line Items]
Debt instrument, face amount	$ 28,700,000,000
2017 debt issuances of $28.7 billion | Floating-rate notes
Debt Instrument [Line Items]
Total term debt	$ 3,250,000,000	$ 3,250,000,000
Debt instrument, maturity year, start	2,019
Debt instrument, maturity year, end	2,022
2017 debt issuances of $28.7 billion | Floating-rate notes | Minimum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.48%	1.38%
2017 debt issuances of $28.7 billion | Floating-rate notes | Maximum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	1.90%	1.81%
2017 debt issuances of $28.7 billion | Fixed-rate 0.875% – 4.300% notes
Debt Instrument [Line Items]
Total term debt	$ 25,699,000,000	$ 25,705,000,000
Debt instrument, maturity year, start	2,019
Debt instrument, maturity year, end	2,047
2017 debt issuances of $28.7 billion | Fixed-rate 0.875% – 4.300% notes | Minimum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	0.875%
Debt instrument, effective interest rate	1.54%	1.51%
2017 debt issuances of $28.7 billion | Fixed-rate 0.875% – 4.300% notes | Maximum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.30%
Debt instrument, effective interest rate	4.30%	4.30%
First quarter 2018 debt issuance of $7.0 billion
Debt Instrument [Line Items]
Debt instrument, face amount	$ 7,000,000,000
First quarter 2018 debt issuance of $7.0 billion | Fixed-rate 1.800% notes
Debt Instrument [Line Items]
Total term debt	$ 1,000,000,000	$ 0
Debt instrument, maturity year	2,019
Debt instrument, stated interest rate	1.80%
Debt instrument, effective interest rate	1.83%	0.00%
First quarter 2018 debt issuance of $7.0 billion | Fixed-rate 2.000% notes
Debt Instrument [Line Items]
Total term debt	$ 1,000,000,000	$ 0
Debt instrument, maturity year	2,020
Debt instrument, stated interest rate	2.00%
Debt instrument, effective interest rate	2.03%	0.00%
First quarter 2018 debt issuance of $7.0 billion | Fixed-rate 2.400% notes
Debt Instrument [Line Items]
Total term debt	$ 750,000,000	$ 0
Debt instrument, maturity year	2,023
Debt instrument, stated interest rate	2.40%
Debt instrument, effective interest rate	1.93%	0.00%
First quarter 2018 debt issuance of $7.0 billion | Fixed-rate 2.750% notes
Debt Instrument [Line Items]
Total term debt	$ 1,500,000,000	$ 0
Debt instrument, maturity year	2,025
Debt instrument, stated interest rate	2.75%
Debt instrument, effective interest rate	2.77%	0.00%
First quarter 2018 debt issuance of $7.0 billion | Fixed-rate 3.000% notes
Debt Instrument [Line Items]
Total term debt	$ 1,500,000,000	$ 0
Debt instrument, maturity year	2,027
Debt instrument, stated interest rate	3.00%
Debt instrument, effective interest rate	2.13%	0.00%
First quarter 2018 debt issuance of $7.0 billion | Fixed-rate 3.750% notes
Debt Instrument [Line Items]
Total term debt	$ 1,250,000,000	$ 0
Debt instrument, maturity year	2,047
Debt instrument, stated interest rate	3.75%
Debt instrument, effective interest rate	3.80%	0.00%

Shareholders' Equity - Summary

Shareholders' Equity - Summary of Dividends Declared and Paid (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended					12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 30, 2017
Equity [Abstract]
Dividends per share (in dollars per share)	$ 0.63	$ 0.63	$ 0.63	$ 0.57	$ 0.57	$ 2.4
Dividend amount	$ 3,232	$ 3,252	$ 3,281	$ 2,988	$ 3,042	$ 12,563

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) - USD ($)	Dec. 30, 2017	May 31, 2017	Apr. 30, 2017
Equity [Abstract]
Maximum amount authorized for repurchase of common stock		$ 210,000,000,000	$ 175,000,000,000
Share repurchase program, amount utilized	$ 176,000,000,000

Shareholders' Equity - Accelera

Shareholders' Equity - Accelerated Share Repurchase Activity and Related Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	2 Months Ended	3 Months Ended		4 Months Ended
	Dec. 30, 2017	Dec. 30, 2017	Sep. 30, 2017	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016
November 2017 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date	2018-02
Number of shares repurchased (in shares)	23,602
ASR amount	$ 5,000
August 2017 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date				2017-11
Number of shares repurchased (in shares)		3,800	15,100	18,887
Average repurchase price per share (in dollars per share)				$ 158.84
ASR amount				$ 3,000
May 2017 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date					2017-08
Number of shares repurchased (in shares)					20,108
Average repurchase price per share (in dollars per share)					$ 149.20
ASR amount					$ 3,000
February 2017 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date						2017-05
Number of shares repurchased (in shares)						20,949
Average repurchase price per share (in dollars per share)						$ 143.20
ASR amount						$ 3,000
November 2016 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date							2017-02
Number of shares repurchased (in shares)							51,157
Average repurchase price per share (in dollars per share)							$ 117.29
ASR amount							$ 6,000
August 2016 ASR
Accelerated Share Repurchases [Line Items]
Stock repurchase program completion date								2016-11
Number of shares repurchased (in shares)								26,850
Average repurchase price per share (in dollars per share)								$ 111.73
ASR amount								$ 3,000

Shareholders' Equity - Repurcha

Shareholders' Equity - Repurchases of Common Shares in Open Market (Details) - Open market repurchases - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended					12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 30, 2017
Stock Repurchase Program [Line Items]
Number of shares repurchased (in shares)	30,181	29,073	30,356	31,070	44,333	134,832
Average repurchase price per share (in dollars per share)	$ 169.26	$ 154.78	$ 148.24	$ 128.74	$ 112.78
Amount	$ 5,109	$ 4,500	$ 4,500	$ 4,001	$ 5,000	$ 18,001

Comprehensive Income - Pre-tax

Comprehensive Income - Pre-tax Amounts Reclassified from AOCI into Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	$ (88,293)	$ (78,351)
Cost of sales	54,381	48,175
Other income/(expense), net	(756)	(821)
Total amounts reclassified from AOCI	(27,030)	(24,180)
Reclassifications out of AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total amounts reclassified from AOCI	7	548
Reclassifications out of AOCI | Unrealized (gains)/losses on derivative instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total amounts reclassified from AOCI	123	517
Reclassifications out of AOCI | Unrealized (gains)/losses on derivative instruments | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	184	(101)
Cost of sales	(27)	13
Other income/(expense), net	(33)	604
Reclassifications out of AOCI | Unrealized (gains)/losses on derivative instruments | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income/(expense), net	(1)	1
Reclassifications out of AOCI | Unrealized (gains)/losses on marketable securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income/(expense), net	$ (116)	$ 31

Comprehensive Income - Change i

Comprehensive Income - Change in AOCI by Component (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances as of September 30, 2017	$ 134,047
Total other comprehensive income/(loss)	(691)	$ (389)
Balances as of December 30, 2017	140,199
Cumulative Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances as of September 30, 2017	(354)
Other comprehensive income/(loss) before reclassifications	41
Amounts reclassified from AOCI	0
Tax effect	(1)
Total other comprehensive income/(loss)	40
Balances as of December 30, 2017	(314)
Unrealized Gains/Losses on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances as of September 30, 2017	(124)
Other comprehensive income/(loss) before reclassifications	154
Amounts reclassified from AOCI	123
Tax effect	(87)
Total other comprehensive income/(loss)	190
Balances as of December 30, 2017	66
Unrealized Gains/Losses on Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances as of September 30, 2017	328
Other comprehensive income/(loss) before reclassifications	(1,310)
Amounts reclassified from AOCI	(116)
Tax effect	505
Total other comprehensive income/(loss)	(921)
Balances as of December 30, 2017	(593)
Total AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances as of September 30, 2017	(150)
Other comprehensive income/(loss) before reclassifications	(1,115)
Amounts reclassified from AOCI	7
Tax effect	417
Total other comprehensive income/(loss)	(691)
Balances as of December 30, 2017	$ (841)

Benefit Plans - Additional Info

Benefit Plans - Additional Information (Details) $ in Millions	3 Months Ended
	Dec. 30, 2017USD ($)shares	Dec. 31, 2016USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance under stock plans (in shares) | shares	273,400,000
Income tax benefit related to share-based compensation expense	$ 631	$ 465
Total unrecognized compensation cost related to RSUs, restricted stock and stock options	$ 12,100
Total unrecognized compensation cost related to RSUs, restricted stock and stock options, weighted-average recognition period	2 years 11 months
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted, vesting period	4 years
Number of shares of common stock issued per RSU upon vesting	1
Reduction in number of shares available for grant per share issued with respect to RSUs granted (in shares) | shares	2
Factor by which each RSU canceled or share withheld for taxes increases the number of shares available for grant	2
Fair value of vested RSUs as of vesting date	$ 3,100	$ 2,200

Benefit Plans - Restricted Stoc

Benefit Plans - Restricted Stock Units Activity and Related Information (Details) - Restricted stock units $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Dec. 30, 2017USD ($)$ / sharesshares
Number of Restricted Stock Units
Beginning balance (in shares) | shares	97,571
RSUs granted (in shares) | shares	35,853
RSUs vested (in shares) | shares	(19,741)
RSUs canceled (in shares) | shares	(1,316)
Ending balance (in shares) | shares	112,367
Weighted-Average Grant Date Fair Value Per Share
Beginning balance (in dollars per share) | $ / shares	$ 110.33
RSUs granted (in dollars per share) | $ / shares	157.49
RSUs vested (in dollars per share) | $ / shares	102.40
RSUs canceled (in dollars per share) | $ / shares	121.76
Ending balance (in dollars per share) | $ / shares	$ 126.64
Aggregate Fair Value
Aggregate fair value of restricted stock units | $	$ 19,016

Benefit Plans - Summary of Shar

Benefit Plans - Summary of Share-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 1,296	$ 1,256
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	252	229
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	646	589
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 398	$ 438

Commitments and Contingencies -

Commitments and Contingencies - Changes in Accrued Warranties and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Changes in Accrued Warranties and Related Costs [Roll Forward]
Beginning accrued warranty and related costs	$ 3,834	$ 3,702
Cost of warranty claims	(982)	(1,337)
Accruals for product warranty	1,471	2,333
Ending accrued warranty and related costs	$ 4,323	$ 4,698

Commitments and Contingencies55

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	May 18, 2015	Mar. 06, 2014	Aug. 24, 2012	Dec. 31, 2015	Dec. 30, 2017
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments, period (up to)					150 days
Total future minimum lease payments under noncancelable operating leases					$ 9,600
Typical term of leases (not exceeding)					10 years
Unconditional purchase obligations					$ 8,700
Samsung Electronics Co., Ltd.
Commitments and Contingencies Disclosure [Line Items]
Award from legal proceeding	$ 548	$ 930	$ 1,050
Samsung Electronics Co., Ltd. | Net sales
Commitments and Contingencies Disclosure [Line Items]
Proceeds from legal settlements				$ 548

Segment Information and Geogr56

Segment Information and Geographic Data - Summary Information by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 88,293	$ 78,351
Operating income	26,274	23,359
Americas
Segment Reporting Information [Line Items]
Net sales	35,193	31,968
Operating income	11,316	10,494
Europe
Segment Reporting Information [Line Items]
Net sales	21,054	18,521
Operating income	6,893	5,736
Greater China
Segment Reporting Information [Line Items]
Net sales	17,956	16,233
Operating income	6,908	6,176
Japan
Segment Reporting Information [Line Items]
Net sales	7,237	5,766
Operating income	3,082	2,673
Rest of Asia Pacific
Segment Reporting Information [Line Items]
Net sales	6,853	5,863
Operating income	$ 2,575	$ 2,229

Segment Information and Geogr57

Segment Information and Geographic Data - Reconciliation of Segment Operating Income to Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ 26,274	$ 23,359
Research and development expense	(3,407)	(2,871)
Operating segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	30,774	27,308
Segment reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Research and development expense	(3,407)	(2,871)
Corporate non-segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Other corporate expenses, net	$ (1,093)	$ (1,078)