Shareholders' Equity

Shareholders’ Equity

Share Repurchase Program

On April 30, 2019, the Company announced the Board of Directors increased the current share repurchase program authorization from $100 billion to $175 billion of the Company’s common stock, of which $96.1 billion had been utilized as of September 28, 2019. During 2019, the Company repurchased 345.2 million shares of its common stock for $67.1 billion, including 62.0 million shares delivered under a $12.0 billion accelerated share repurchase arrangement dated February 2019, which settled in August 2019. The Company’s share repurchase program does not obligate it to acquire any specific number of shares. Under this 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”).

Shares of Common Stock

The following table shows the changes in shares of common stock for 2019, 2018 and 2017 (in thousands):



	2019		2018		2017
Common stock outstanding, beginning balances	4,754,986		5,126,201		5,336,166
Common stock repurchased	(345,205	)	(405,549	)	(246,496	)
Common stock issued, net of shares withheld for employee taxes	33,455		34,334		36,531
Common stock outstanding, ending balances	4,443,236		4,754,986		5,126,201

Comprehensive Income

12 Months Ended

Sep. 28, 2019

Share-based Payment Arrangement [Abstract]

Comprehensive 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 debt securities classified as available-for-sale.

The following table shows the pre-tax amounts reclassified from AOCI into the Consolidated Statements of Operations, and the associated financial statement line item, for 2019 and 2018 (in millions):



Comprehensive Income Components	Financial Statement Line Item	2019			2018
Unrealized (gains)/losses on derivative instruments:
Foreign exchange contracts	Total net sales	$	(206	)	$	214
	Total cost of sales	(482		)	(70		)
	Other income/(expense), net	784			344
Interest rate contracts	Other income/(expense), net	7			(2		)
		103			486
Unrealized (gains)/losses on marketable securities	Other income/(expense), net	31			(20		)
Total amounts reclassified from AOCI		$	134		$	466

The following table shows the changes in AOCI by component for 2019 and 2018 (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	(524		)	672			(4,563		)	(4,415		)
Amounts reclassified from AOCI	—			486			(20		)	466
Tax effect	(1		)	(253		)	1,177			923
Other comprehensive income/(loss)	(525		)	905			(3,406		)	(3,026		)
Cumulative effect of change in accounting principle	(176		)	29			(131		)	(278		)
Balances as of September 29, 2018	(1,055		)	810			(3,209		)	(3,454		)
Other comprehensive income/(loss) before reclassifications	(421		)	(949		)	4,854			3,484
Amounts reclassified from AOCI	—			103			31			134
Tax effect	13			208			(1,058		)	(837		)
Other comprehensive income/(loss)	(408		)	(638		)	3,827			2,781
Cumulative effect of change in accounting principle ⁽¹⁾	—			—			89			89
Balances as of September 28, 2019	$	(1,463	)	$	172		$	707		$	(584	)

(1)

Refer to Note 1, “Summary of Significant Accounting Policies” for more information on the Company’s adoption of ASU 2016-01 in 2019.

Benefit Plans

12 Months Ended

Sep. 28, 2019

Benefit Plans

2014 Employee Stock Plan

In the second quarter of 2014, shareholders approved the 2014 Employee Stock Plan (the “2014 Plan”) and terminated the Company’s authority to grant new awards under the 2003 Employee Stock Plan (the “2003 Plan”). The 2014 Plan provides for broad-based equity grants to employees, including executive officers, and permits the granting of RSUs, stock grants, performance-based awards, stock options and stock appreciation rights, as well as cash bonus awards. RSUs granted under the 2014 Plan 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. RSUs granted under the 2014 Plan reduce the number of shares available for grant under the plan by a factor of two times the number of RSUs granted. RSUs canceled and shares withheld to satisfy tax withholding obligations increase the number of shares available for grant under the 2014 Plan utilizing a factor of two times the number of RSUs canceled or shares withheld. Currently, all RSUs granted under the 2014 Plan have dividend equivalent rights (“DERs”), which entitle holders of RSUs to the same dividend value per share as holders of common stock. DERs are subject to the same vesting and other terms and conditions as the corresponding unvested RSUs. DERs are accumulated and paid when the underlying shares vest. Upon approval of the 2014 Plan, the Company reserved 385 million shares plus the number of shares remaining that were reserved but not issued under the 2003 Plan. Shares subject to outstanding awards under the 2003 Plan that expire, are canceled or otherwise terminate, or are withheld to satisfy tax withholding obligations for RSUs, will also be available for awards under the 2014 Plan. As of September 28, 2019, approximately 246.4 million shares were reserved for future issuance under the 2014 Plan.

Apple Inc. Non-Employee Director Stock Plan

The Apple Inc. Non-Employee Director Stock Plan (the “Director Plan”) is a shareholder-approved plan that (i) permits the Company to grant awards of RSUs or stock options to the Company’s non-employee directors, (ii) provides for automatic initial grants of RSUs upon a non-employee director joining the Board of Directors and automatic annual grants of RSUs at each annual meeting of shareholders, and (iii) permits the Board of Directors to prospectively change the value and relative mixture of stock options and RSUs for the initial and annual award grants and the methodology for determining the number of shares of the Company’s common stock subject to these grants, in each case within the limits set forth in the Director Plan and without further shareholder approval. RSUs granted under the Director Plan reduce the number of shares available for grant under the plan by a factor of two times the number of RSUs granted. The Director Plan expires on November 12, 2027. All RSUs granted under the Director Plan are entitled to DERs. DERs are subject to the same vesting and other terms and conditions as the corresponding unvested RSUs. DERs are accumulated and paid when the underlying shares vest. As of September 28, 2019, approximately 1.1 million shares were reserved for future issuance under the Director Plan.

Rule 10b5-1 Trading Plans

During the three months ended September 28, 2019, Section 16 officers Timothy D. Cook, Chris Kondo, Luca Maestri, Deirdre O’Brien and Jeffrey Williams 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 under the Company’s employee and director equity plans.

Employee Stock Purchase Plan

The Employee Stock Purchase Plan (the “Purchase Plan”) is a shareholder-approved plan under which substantially all employees may purchase the Company’s common stock through payroll deductions at a price equal to 85% of the lower of the fair market values of the stock as of the beginning or the end of six-month offering periods. An employee’s payroll deductions under the Purchase Plan are limited to 10% of the employee’s compensation and employees may not purchase more than $25,000 of stock during any calendar year. As of September 28, 2019, approximately 31.1 million shares were reserved for future issuance under the Purchase Plan.

401(k) Plan

The Company’s 401(k) Plan is a deferred salary arrangement under Section 401(k) of the Internal Revenue Code. Under the 401(k) Plan, participating U.S. employees may defer a portion of their pre-tax earnings, up to the IRS annual contribution limit ($19,000 for calendar year 2019). The Company matches 50% to 100% of each employee’s contributions, depending on length of service, up to a maximum of 6% of the employee’s eligible earnings.

Restricted Stock Units

A summary of the Company’s RSU activity and related information for 2019, 2018 and 2017, is as follows:



	Number of RSUs (in thousands)		Weighted-Average Grant Date Fair Value Per RSU		Aggregate Fair Value (in millions)
Balance as of September 24, 2016	99,089		$	97.54
RSUs granted	50,112		$	121.65
RSUs vested	(45,735	)	$	95.48
RSUs canceled	(5,895	)	$	106.87
Balance as of September 30, 2017	97,571		$	110.33
RSUs granted	45,351		$	162.86
RSUs vested	(44,718	)	$	111.24
RSUs canceled	(6,049	)	$	127.82
Balance as of September 29, 2018	92,155		$	134.60
RSUs granted	36,852		$	215.95
RSUs vested	(42,088	)	$	135.21
RSUs canceled	(5,402	)	$	162.85
Balance as of September 28, 2019	81,517		$	169.18	$	17,838

The fair value as of the respective vesting dates of RSUs was $8.6 billion, $7.6 billion and $6.1 billion for 2019, 2018 and 2017, respectively. The majority of RSUs that vested in 2019, 2018 and 2017 were net share settled such that the Company withheld shares with a value equivalent to the employees’ obligation for the applicable income and other employment taxes, and remitted the cash to the appropriate taxing authorities. The total shares withheld were approximately 14.8 million, 16.0 million and 15.4 million for 2019, 2018 and 2017, respectively, and were based on the value of the RSUs on their respective vesting dates as determined by the Company’s closing stock price. Total payments for the employees’ tax obligations to taxing authorities were $3.0 billion, $2.7 billion and $2.0 billion in 2019, 2018 and 2017, respectively. These net share settlements had the effect of share repurchases by the Company as they reduced the number of shares that would have otherwise been issued as a result of the vesting and did not represent an expense to the Company.

Share-Based Compensation

The following table shows share-based compensation expense and the related income tax benefit included in the Consolidated Statements of Operations for 2019, 2018 and 2017 (in millions):



	2019			2018			2017
Share-based compensation expense	$	6,068		$	5,340		$	4,840
Income tax benefit related to share-based compensation expense	$	(1,967	)	$	(1,893	)	$	(1,632	)

As of September 28, 2019, the total unrecognized compensation cost related to outstanding RSUs and stock options was $10.5 billion, which the Company expects to recognize over a weighted-average period of 2.5 years.

Commitments and Contingencies

12 Months Ended

Sep. 28, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Accrued Warranty and Guarantees

The following table shows changes in the Company’s accrued warranties and related costs for 2019, 2018 and 2017 (in millions):



	2019			2018			2017
Beginning accrued warranty and related costs	$	3,692		$	3,834		$	3,702
Cost of warranty claims	(3,857		)	(4,115		)	(4,322		)
Accruals for product warranty	3,735			3,973			4,454
Ending accrued warranty and related costs	$	3,570		$	3,692		$	3,834

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 net sales.

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, certain components are currently obtained from single or limited sources. The Company also competes for various components with other participants in the markets for smartphones, personal computers, tablets and other electronic devices. 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 commodity pricing fluctuations.

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 their manufacturing capacities have increased. The continued availability of these components at acceptable prices, or at all, may be affected if 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.

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.

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 September 28, 2019, the Company’s total future minimum lease payments under noncancelable operating leases were $10.8 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.

Rent expense under all operating leases, including both cancelable and noncancelable leases, was $1.3 billion, $1.2 billion and $1.1 billion in 2019, 2018 and 2017, respectively. Future minimum lease payments under noncancelable operating leases having initial or remaining terms in excess of one year as of September 28, 2019, are as follows (in millions):



2020	$	1,306
2021	1,276
2022	1,137
2023	912
2024	834
Thereafter	5,373
Total	$	10,838

Unconditional Purchase Obligations

The Company has entered into certain off–balance sheet commitments that 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, intellectual property licenses and content creation. Future payments under noncancelable unconditional purchase obligations having a remaining term in excess of one year as of September 28, 2019, are as follows (in millions):



2020	$	2,476
2021	2,386
2022	1,859
2023	1,162
2024	218
Thereafter	110
Total	$	8,211

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 resolved. The outcome of litigation is inherently uncertain. If one or more legal matters were resolved against the Company in a reporting period for amounts above management’s expectations, the Company’s financial condition and operating results for that reporting period could be materially adversely affected. 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 greater than a recorded accrual, concerning loss contingencies for asserted legal and other claims, except for the following matters:

VirnetX

VirnetX, Inc. (“VirnetX”) filed two lawsuits in the U.S. District Court for the Eastern District of Texas (the “Eastern Texas District Court”) against the Company alleging that certain Company products infringe four patents (the “VirnetX Patents”) relating to network communications technology (“VirnetX I” and “VirnetX II”). On September 30, 2016, a jury returned a verdict in VirnetX I against the Company and awarded damages of $302 million, which later increased to $440 million in post-trial proceedings. The Company appealed the VirnetX I verdict to the U.S. Court of Appeals for the Federal Circuit (the “Federal Circuit”). On April 11, 2018, a jury returned a verdict in VirnetX II against the Company and awarded damages of $503 million. VirnetX II is currently on appeal. The Company has challenged the validity of the VirnetX Patents at the U.S. Patent and Trademark Office (the “PTO”). In response, the PTO has declared the VirnetX Patents invalid. VirnetX appealed the invalidity decision of the PTO to the Federal Circuit. The Federal Circuit consolidated the Company’s appeal of the Eastern Texas District Court VirnetX I verdict and VirnetX’s appeals from the PTO invalidity proceedings. On January 15, 2019, the Federal Circuit affirmed the VirnetX I verdict, which the Company intends to further appeal. On July 8, 2019, the Federal Circuit remanded one of VirnetX’s two appeals of the PTO’s invalidity decisions back to the PTO for further proceedings. On August 1, 2019, the Federal Circuit affirmed-in-part, vacated-in-part, and remanded back to the PTO portions of VirnetX’s second appeal. The Company has accrued its best estimate for the ultimate resolution of these matters.

Qualcomm

On January 20, 2017, the Company filed a lawsuit against Qualcomm Incorporated and affiliated parties (“Qualcomm”) in the U.S. District Court for the Southern District of California seeking, among other things, to enjoin Qualcomm from requiring the Company to pay royalties at the rate demanded by Qualcomm. No Qualcomm-related royalty payments had been remitted by the Company to its contract manufacturers since the beginning of the second quarter of 2017. Following the Company’s lawsuit, Qualcomm filed patent infringement suits against the Company and its affiliates in the U.S. and various international jurisdictions, some of which sought to enjoin the sale of certain of the Company’s products in particular countries.

On April 16, 2019, the Company and Qualcomm reached a settlement agreement to dismiss all litigation between the two companies worldwide. The companies also reached a multi-year license agreement and a multi-year supply agreement. Under the terms of the settlement agreement, Apple made a payment to Qualcomm to, among other things, resolve disputes over the withheld royalty payments.

iOS Performance Management Cases

Various civil litigation matters have been filed in state and federal courts in the U.S. and in various international jurisdictions alleging violation of consumer protection laws, fraud, computer intrusion and other causes of action related to the Company’s performance management feature used in its iPhone operating systems, introduced to certain iPhones in iOS updates 10.2.1 and 11.2. The claims seek monetary damages and other non-monetary relief. On April 5, 2018, several U.S. federal actions were consolidated through a Multidistrict Litigation process into a single action in the U.S. District Court for the Northern District of California. In addition to civil litigation, the Company is also responding to governmental investigations and requests for information relating to the performance management feature. The Company believes that its iPhones were not defective, that the performance management feature introduced with iOS updates 10.2.1 and 11.2 was intended to, and did, improve customers’ user experience, and that the Company did not make any misleading statements or fail to disclose any material information. The Company has accrued its best estimate for the ultimate resolution of these matters.

French Competition Authority

In June 2019, the French Competition Authority (“FCA”) issued a report alleging that aspects of the Company’s sales and distribution practices in France violate French competition law. The Company vigorously disagrees with the allegations, and a hearing of arguments was held before the FCA on October 15, 2019. The Company is awaiting the decision of the FCA, which may include a fine.

Segment Information and Geographic Data

12 Months Ended

Sep. 28, 2019

Segment Reporting [Abstract]

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.”

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 2019, 2018 and 2017 (in millions):



	2019		2018		2017
Americas:
Net sales	$	116,914	$	112,093	$	96,600
Operating income	$	35,099	$	34,864	$	30,684

Europe:
Net sales	$	60,288	$	62,420	$	54,938
Operating income	$	19,195	$	19,955	$	16,514

Greater China:
Net sales	$	43,678	$	51,942	$	44,764
Operating income	$	16,232	$	19,742	$	17,032

Japan:
Net sales	$	21,506	$	21,733	$	17,733
Operating income	$	9,369	$	9,500	$	8,097

Rest of Asia Pacific:
Net sales	$	17,788	$	17,407	$	15,199
Operating income	$	6,055	$	6,181	$	5,304

A reconciliation of the Company’s segment operating income to the Consolidated Statements of Operations for 2019, 2018 and 2017 is as follows (in millions):



	2019			2018			2017
Segment operating income	$	85,950		$	90,242		$	77,631
Research and development expense	(16,217		)	(14,236		)	(11,581		)
Other corporate expenses, net	(5,803		)	(5,108		)	(4,706		)
Total operating income	$	63,930		$	70,898		$	61,344

The U.S. and China were the only countries that accounted for more than 10% of the Company’s net sales in 2019, 2018 and 2017. There was no single customer that accounted for more than 10% of net sales in 2019, 2018 and 2017. Net sales for 2019, 2018 and 2017 and long-lived assets as of September 28, 2019 and September 29, 2018 were as follows (in millions):



	2019		2018		2017
Net sales:
U.S.	$	102,266	$	98,061	$	84,339
China⁽¹⁾	43,678		51,942		44,764
Other countries	114,230		115,592		100,131
Total net sales	$	260,174	$	265,595	$	229,234



	2019		2018
Long-lived assets:
U.S.	$	24,711	$	23,963
China ⁽¹⁾	9,064		13,268
Other countries	3,603		4,073
Total long-lived assets	$	37,378	$	41,304

(1)

China includes Hong Kong and Taiwan. Long-lived assets located in China consist primarily of product tooling and manufacturing process equipment and assets related to retail stores and related infrastructure.

Selected Quarterly Financial Information (Unaudited)

12 Months Ended

Sep. 28, 2019

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Information (Unaudited)

The following tables show a summary of the Company’s quarterly financial information for each of the four quarters of 2019 and 2018 (in millions, except per share amounts):



	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
2019:
Total net sales	$	64,040	$	53,809	$	58,015	$	84,310
Gross margin	$	24,313	$	20,227	$	21,821	$	32,031
Net income	$	13,686	$	10,044	$	11,561	$	19,965

Earnings per share ⁽¹⁾:
Basic	$	3.05	$	2.20	$	2.47	$	4.22
Diluted	$	3.03	$	2.18	$	2.46	$	4.18



	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
2018:
Total net sales	$	62,900	$	53,265	$	61,137	$	88,293
Gross margin	$	24,084	$	20,421	$	23,422	$	33,912
Net income	$	14,125	$	11,519	$	13,822	$	20,065

Earnings per share ⁽¹⁾:
Basic	$	2.94	$	2.36	$	2.75	$	3.92
Diluted	$	2.91	$	2.34	$	2.73	$	3.89

(1)

Basic and diluted earnings per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 28, 2019
Accounting Policies [Abstract]
Basis of Presentation and Preparation	Basis of Presentation and Preparation The accompanying consolidated financial statements include the accounts of Apple Inc. and its wholly owned subsidiaries (collectively “Apple” or the “Company”). Intercompany accounts and transactions have been eliminated. In the opinion of the Company’s management, the consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. The preparation of these consolidated financial statements and accompanying notes in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ materially from those estimates. Certain prior period amounts in the consolidated financial statements and accompanying notes have been reclassified to conform to the current period’s presentation.
Fiscal Period	The Company’s fiscal year is the 52- or 53-week period that ends on the last Saturday of September. The Company’s fiscal years 2019 and 2018 spanned 52 weeks each, whereas fiscal year 2017 included 53 weeks. A 14th week was included in 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.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements Revenue Recognition In the first quarter of 2019, the Company adopted the Financial Accounting Standards Board’s (the “FASB”) Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), and additional ASUs issued to clarify the guidance in ASU 2014-09 (collectively the “new revenue standard”), which amends the existing accounting standards for revenue recognition. The Company adopted the new revenue standard utilizing the full retrospective transition method. The Company did not restate total net sales in the prior periods presented, as the adoption of the new revenue standard did not have a material impact on previously reported amounts. Additionally, beginning in the first quarter of 2019, the Company classified the amortization of the deferred value of Maps, Siri and free iCloud services, which are bundled in the sales price of iPhone, Mac, iPad and certain other products, in Services net sales. Historically, the Company classified the amortization of these amounts in Products net sales consistent with its management reporting framework. As a result, Products and Services net sales for 2018 and 2017 were reclassified to conform to the 2019 presentation. Financial Instruments In the first quarter of 2019, the Company adopted FASB ASU No. 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities (“ASU 2016-01”), which updates certain aspects of the recognition, measurement, presentation and disclosure of financial instruments. The adoption of ASU 2016-01 did not have a material impact on the Company’s consolidated financial statements. Income Taxes In the first quarter of 2019, the Company adopted FASB ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory (“ASU 2016-16”), which requires the recognition of the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. The Company adopted ASU 2016-16 utilizing the modified retrospective transition method. Upon adoption, the Company recorded $2.7 billion of net deferred tax assets, reduced other non-current assets by $128 million, and increased retained earnings by $2.6 billion on its Consolidated Balance Sheet. The Company will recognize incremental deferred income tax expense as these net deferred tax assets are utilized. Restricted Cash In the first quarter of 2019, the Company adopted FASB ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (“ASU 2016-18”), which enhances and clarifies the guidance on the classification and presentation of restricted cash in the statement of cash flows and requires additional disclosures about restricted cash balances.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred and included in selling, general and administrative expenses.
Share-Based Compensation	Share-Based Compensation The Company generally measures share-based compensation based on the closing price of the Company’s common stock on the date of grant, and recognizes expense on a straight-line basis for its estimate of equity awards that will ultimately vest. Further information regarding share-based compensation can be found in Note 9, “Benefit Plans.”
Earnings Per Share	The Company applies the treasury stock method to determine the dilutive effect of potentially dilutive securities.
Cash Equivalents and Marketable Securities	Cash Equivalents and Marketable Securities All highly liquid investments with maturities of three months or less at the date of purchase are classified as cash equivalents. The Company’s investments in marketable debt securities have been classified and accounted for as available-for-sale. The Company classifies its marketable debt securities as either short-term or long-term based on each instrument’s underlying contractual maturity date. Unrealized gains and losses on marketable debt securities classified as available-for-sale are recognized in other comprehensive income/(loss) (“OCI”). The Company’s investments in marketable equity securities are classified based on the nature of the securities and their availability for use in current operations. The Company’s marketable equity securities are measured at fair value with gains and losses recognized in other income/(expense), net (“OI&E”). The cost of securities sold is determined using the specific identification method.
Inventories	Inventories Inventories are measured using the first-in, first-out method.
Property, Plant and Equipment	Property, Plant and Equipment Depreciation on property, plant and equipment is recognized on a straight-line basis over the estimated useful lives of the assets, which for buildings is the lesser of 30 years or the remaining life of the underlying building; between one and five years for machinery and equipment, including product tooling and manufacturing process equipment; and the shorter of lease term or useful life for leasehold improvements. Capitalized costs related to internal-use software are amortized on a straight-line basis over the estimated useful lives of the assets, which range from three to five years.
Non-Marketable Securities	Non-Marketable Securities The Company has elected to apply the measurement alternative to equity securities without readily determinable fair values. As such, the Company’s non-marketable equity securities are measured at cost, less any impairment, and are adjusted for changes in fair value resulting from observable transactions for identical or similar investments of the same issuer. Gains and losses on non-marketable equity securities are recognized in OI&E.
Restricted Cash and Restricted Marketable Securities	Restricted Cash and Restricted Marketable Securities The Company considers cash and marketable securities to be restricted when withdrawal or general use is legally restricted. The Company records restricted cash as other assets in the Consolidated Balance Sheets, and determines current or non-current classification based on the expected duration of the restriction. The Company records restricted marketable securities as current or non-current marketable securities in the Consolidated Balance Sheets based on the classification of the underlying securities
Fair Value Measurements	Fair Value Measurements The fair values of the Company’s money market funds and certain marketable equity securities are based on quoted prices in active markets for identical assets. The valuation techniques used to measure the fair value of the Company’s debt instruments and all other financial instruments, which generally have counterparties with high credit ratings, are based on quoted market prices or model-driven valuations using significant inputs derived from or corroborated by observable market data. 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. Level 1 fair value estimates are based on quoted prices in active markets for identical assets or liabilities.
Revenue Recognition	Revenue Recognition Net sales consist of revenue from the sale of iPhone, Mac, iPad, Services and other products. The Company recognizes revenue at the amount to which it expects to be entitled when control of the products or services is transferred to its customers. Control is generally transferred when the Company has a present right to payment and title and the significant risks and rewards of ownership of products or services are transferred to its customers. For most of the Company’s Products net sales, control transfers when products are shipped. For the Company’s Services net sales, control transfers over time as services are delivered. Payment for Products and Services net sales is collected within a short period following transfer of control or commencement of delivery of services, as applicable. The Company records reductions to Products net sales related to future product returns, price protection and other customer incentive programs based on the Company’s expectations and historical experience. For arrangements with multiple performance obligations, which represent promises within an arrangement that are capable of being distinct, the Company allocates revenue to all distinct performance obligations based on their relative stand-alone selling prices (“SSPs”). When available, the Company uses observable prices to determine SSPs. When observable prices are not available, SSPs are established that reflect the Company’s best estimates of what the selling prices of the performance obligations would be if they were sold regularly on a stand-alone basis. The Company’s process for estimating SSPs without observable prices considers multiple factors that may vary depending upon the unique facts and circumstances related to each performance obligation including, where applicable, prices charged by the Company for similar offerings, market trends in the pricing for similar offerings, product-specific business objectives and the estimated cost to provide the performance obligation. The Company has identified up to three performance obligations regularly included in arrangements involving the sale of iPhone, Mac, iPad and certain other products. The first performance obligation, which represents the substantial portion of the allocated sales price, is the hardware and bundled software delivered at the time of sale. The second performance obligation is the right to receive certain product-related bundled services, which include iCloud, Siri and Maps. The third performance obligation is the right to receive, on a when-and-if-available basis, future unspecified software upgrades relating to the software bundled with each device. The Company allocates revenue and any related discounts to these performance obligations based on their relative SSPs. Because the Company lacks observable prices for the undelivered performance obligations, the allocation of revenue is based on the Company’s estimated SSPs. Revenue allocated to the delivered hardware and bundled software is recognized when control has transferred to the customer, which generally occurs when the product is shipped. Revenue allocated to the product-related bundled services and unspecified software upgrade rights is deferred and recognized on a straight-line basis over the estimated period they are expected to be provided. Cost of sales related to delivered hardware and bundled software, including estimated warranty costs, are recognized at the time of sale. Costs incurred to provide product-related bundled services and unspecified software upgrade rights are recognized as cost of sales as incurred. For certain long-term service arrangements, the Company has performance obligations for services it has not yet delivered. For these arrangements, the Company does not have a right to bill for the undelivered services. The Company has determined that any unbilled consideration relates entirely to the value of the undelivered services. Accordingly, the Company has not recognized revenue, and has elected not to disclose amounts, related to these undelivered services. For the sale of third-party products where the Company obtains control of the product before transferring it to the customer, the Company recognizes revenue based on the gross amount billed to customers. The Company considers multiple factors when determining whether it obtains control of third-party products including, but not limited to, evaluating if it can establish the price of the product, retains inventory risk for tangible products or has the responsibility for ensuring acceptability of the product. For third-party applications sold through the App Store, Mac App Store, TV App Store and Watch App Store and certain digital content sold through the Company’s other digital content stores, the Company does not obtain control of the product before transferring it to the customer. Therefore, the Company accounts for such sales on a net basis by recognizing in Services net sales only the commission it retains. The Company has elected to record revenue net of taxes collected from customers that are remitted to governmental authorities, with the collected taxes recorded within other current liabilities until remitted to the relevant government authority.
Derivative Financial Instruments	The Company records all derivatives in the 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, net investments in certain foreign subsidiaries, and 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 or 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 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 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 generally hedges portions of its forecasted foreign currency exposure associated with revenue and inventory purchases, typically for up to 12 months. To protect the net investment in a foreign operation from fluctuations in foreign currency exchange rates, the Company may enter into foreign currency forward and option contracts to offset a portion of 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 hedges of its net investments in certain foreign subsidiaries. In both of these cases, the Company designates these instruments as net investment hedges. To protect the Company’s foreign currency–denominated term debt or marketable securities from fluctuations in foreign currency exchange rates, the Company may enter into forward contracts, cross-currency swaps or other instruments. These instruments may offset a portion of the foreign currency remeasurement gains or losses, or changes in fair value. The Company may designate these instruments as either cash flow or fair value hedges. As of September 28, 2019, the Company’s hedged term debt– and marketable securities–related foreign currency transactions are expected to be recognized within 23 years. The Company may also enter into non-designated foreign currency contracts to offset a portion of the foreign currency exchange gains and losses generated by the remeasurement of certain assets and liabilities denominated in non-functional currencies. To protect the Company’s foreign currency–denominated term debt or marketable securities from fluctuations in interest rates, the Company may enter into interest rate swaps, options or other instruments. These instruments may offset a portion of the changes in interest income or expense, or changes in fair value. The Company designates these instruments as either cash flow or fair value hedges. As of September 28, 2019, the Company’s hedged interest rate transactions are expected to be recognized within 8 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 OI&E in the same period as the related income or expense is recognized. For options designated as cash flow hedges, changes in the time value are excluded from the assessment of hedge effectiveness. The ineffective portions and amounts excluded from the effectiveness testing of cash flow hedges are recognized in OI&E. 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 OI&E in the period of de-designation. Any subsequent changes in fair value of such derivative instruments are reflected in OI&E unless they are re-designated as hedges of other transactions. Net Investment Hedges The effective portions of net investment hedges are recorded in 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 OI&E. For foreign exchange forward contracts designated as net investment hedges, the Company excludes changes in fair value relating to changes in the forward carry component from its assessment of hedge effectiveness. Accordingly, any gains or losses related to this forward carry component are recognized in earnings in the current period. 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 in the same line in the Consolidated Statements of Operations. For foreign exchange forward contracts designated as fair value hedges, the Company excludes changes in fair value relating to changes in the forward carry component from its assessment of hedge effectiveness. The amount excluded from the effectiveness testing of fair value hedges was a gain of $777 million for 2019, and was recognized in OI&E. 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. The Company classifies cash flows related to derivative financial instruments as operating activities in its Consolidated Statements of Cash Flows.
Income Taxes	The Company includes interest and penalties related to income tax matters within the provision for income taxes.The Act also created a new minimum tax on certain foreign earnings, for which the Company has elected to record certain deferred tax assets and liabilities.
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.” 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 Accounting Policies (Tables)

12 Months Ended

Sep. 28, 2019

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 2019, 2018 and 2017 (net income in millions and shares in thousands):



	2019		2018		2017
Numerator:
Net income	$	55,256	$	59,531	$	48,351

Denominator:
Weighted-average basic shares outstanding	4,617,834		4,955,377		5,217,242
Effect of dilutive securities	31,079		44,732		34,450
Weighted-average diluted shares	4,648,913		5,000,109		5,251,692

Basic earnings per share	$	11.97	$	12.01	$	9.27
Diluted earnings per share	$	11.89	$	11.91	$	9.21

Revenue Recognition (Tables)

12 Months Ended

Sep. 28, 2019

Revenue from Contract with Customer [Abstract]

Disaggregated Revenue

Net sales disaggregated by significant products and services for 2019, 2018 and 2017 were as follows (in millions):



	2019		2018		2017
iPhone⁽¹⁾	$	142,381	$	164,888	$	139,337
Mac ⁽¹⁾	25,740		25,198		25,569
iPad⁽¹⁾	21,280		18,380		18,802
Wearables, Home and Accessories ⁽¹⁾⁽²⁾	24,482		17,381		12,826
Services ⁽³⁾	46,291		39,748		32,700
Total net sales ⁽⁴⁾	$	260,174	$	265,595	$	229,234


(1)	Products net sales include amortization of the deferred value of unspecified software upgrade rights, which are bundled in the sales price of the respective product.


(2)	Wearables, Home and Accessories net sales include sales of AirPods, Apple TV, Apple Watch, Beats products, HomePod, iPod touch and Apple-branded and third-party accessories.


(3)	Services net sales include sales from the Company’s digital content stores and streaming services, AppleCare, licensing and other services. Services net sales also include amortization of the deferred value of Maps, Siri and free iCloud services, which are bundled in the sales price of certain products.

(4)

Includes $5.9 billion of revenue recognized in 2019 that was included in deferred revenue as of September 29, 2018, $5.8 billion of revenue recognized in 2018 that was included in deferred revenue as of September 30, 2017, and $6.3 billion of revenue recognized in 2017 that was included in deferred revenue as of September 24, 2016.

Financial Instruments (Tables)

12 Months Ended

Sep. 28, 2019

Investments, All Other Investments [Abstract]

Cash and Available-for-Sale Securities by Significant Investment Category

The following tables show the Company’s cash and marketable securities by significant investment category as of September 28, 2019 and September 29, 2018 (in millions):



	2019
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short-Term Marketable Securities		Long-Term Marketable Securities
Cash	$	12,204	$	—	$	—		$	12,204	$	12,204	$	—	$	—
Level 1 ⁽¹⁾:
Money market funds	15,897		—		—			15,897		15,897		—		—
Subtotal	15,897		—		—			15,897		15,897		—		—
Level 2 ⁽²⁾:
U.S. Treasury securities	30,293		33		(62		)	30,264		6,165		9,817		14,282
U.S. agency securities	9,767		1		(3		)	9,765		6,489		2,249		1,027
Non-U.S. government securities	19,821		337		(50		)	20,108		749		3,168		16,191
Certificates of deposit and time deposits	4,041		—		—			4,041		2,024		1,922		95
Commercial paper	12,433		—		—			12,433		5,193		7,240		—
Corporate debt securities	85,383		756		(92		)	86,047		123		26,127		59,797
Municipal securities	958		8		(1		)	965		—		68		897
Mortgage- and asset-backed securities	14,180		67		(73		)	14,174		—		1,122		13,052
Subtotal	176,876		1,202		(281		)	177,797		20,743		51,713		105,341
Total ⁽³⁾	$	204,977	$	1,202	$	(281	)	$	205,898	$	48,844	$	51,713	$	105,341



	2018
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short-Term Marketable Securities		Long-Term Marketable Securities
Cash	$	11,575	$	—	$	—		$	11,575	$	11,575	$	—	$	—
Level 1 ⁽¹⁾:
Money market funds	8,083		—		—			8,083		8,083		—		—
Mutual funds	799		—		(116		)	683		—		683		—
Subtotal	8,882		—		(116		)	8,766		8,083		683		—
Level 2 ⁽²⁾:
U.S. Treasury securities	47,296		—		(1,202		)	46,094		1,613		7,606		36,875
U.S. agency securities	4,127		—		(48		)	4,079		1,732		360		1,987
Non-U.S. government securities	21,601		49		(250		)	21,400		—		3,355		18,045
Certificates of deposit and time deposits	3,074		—		—			3,074		1,247		1,330		497
Commercial paper	2,573		—		—			2,573		1,663		910		—
Corporate debt securities	123,001		152		(2,038		)	121,115		—		25,162		95,953
Municipal securities	946		—		(12		)	934		—		178		756
Mortgage- and asset-backed securities	18,105		8		(623		)	17,490		—		804		16,686
Subtotal	220,723		209		(4,173		)	216,759		6,255		39,705		170,799
Total ⁽³⁾	$	241,180	$	209	$	(4,289	)	$	237,100	$	25,913	$	40,388	$	170,799


(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.

(3)

As of September 28, 2019 and September 29, 2018, total cash, cash equivalents and marketable securities included $18.9 billion and $20.3 billion, respectively, that was restricted from general use, related to the State Aid Decision (refer to Note 5, “Income Taxes”) and other agreements.

Marketable Securities in a Continuous Unrealized Loss Position

The following tables show information about the Company’s marketable securities that had been in a continuous unrealized loss position for less than 12 months and for 12 months or greater as of September 28, 2019 and September 29, 2018 (in millions):



	2019
	Continuous Unrealized Losses
	Less than 12 Months			12 Months or Greater			Total
Fair value of marketable debt securities	$	28,151		$	28,167		$	56,318
Unrealized losses	$	(138	)	$	(143	)	$	(281	)



	2018
	Continuous Unrealized Losses
	Less than 12 Months			12 Months or Greater			Total
Fair value of marketable securities	$	126,238		$	60,599		$	186,837
Unrealized losses	$	(2,400	)	$	(1,889	)	$	(4,289	)

Cash, Cash Equivalents and Restricted Cash Reconciliation

A reconciliation of the Company’s cash and cash equivalents in the Consolidated Balance Sheet to cash, cash equivalents and restricted cash in the Consolidated Statement of Cash Flows as of September 28, 2019 is as follows (in millions):



	2019
Cash and cash equivalents	$	48,844
Restricted cash included in other current assets	23
Restricted cash included in other non-current assets	1,357
Cash, cash equivalents and restricted cash	$	50,224

Derivative Instruments at Gross Fair Value

The following tables show the Company’s derivative instruments at gross fair value as of September 28, 2019 and September 29, 2018 (in millions):



	2019
	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	$	1,798	$	323	$	2,121
Interest rate contracts	$	685	$	—	$	685

Derivative liabilities ⁽²⁾:
Foreign exchange contracts	$	1,341	$	160	$	1,501
Interest rate contracts	$	105	$	—	$	105



	2018
	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	$	1,015	$	259	$	1,274

Derivative liabilities ⁽²⁾:
Foreign exchange contracts	$	543	$	137	$	680
Interest rate contracts	$	1,456	$	—	$	1,456


(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 Consolidated Balance Sheets.

(2)

The fair value of derivative liabilities is measured using Level 2 fair value inputs and is recorded as other current liabilities and other non-current liabilities in the 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 Consolidated Statements of Operations for 2019, 2018 and 2017 (in millions):



	2019			2018			2017
Gains/(Losses) recognized in OCI – effective portion:
Cash flow hedges:
Foreign exchange contracts	$	(959	)	$	682		$	1,797
Interest rate contracts	—			1			7
Total	$	(959	)	$	683		$	1,804

Net investment hedges:
Foreign currency debt	$	(58	)	$	4		$	67

Gains/(Losses) reclassified from AOCI into net income – effective portion:
Cash flow hedges:
Foreign exchange contracts	$	(116	)	$	(482	)	$	1,958
Interest rate contracts	(7		)	1			(2		)
Total	$	(123	)	$	(481	)	$	1,956

Gains/(Losses) on derivative instruments:
Fair value hedges:
Foreign exchange contracts	$	1,020		$	(168	)	$	—
Interest rate contracts	2,068			(1,363		)	(810		)
Total	$	3,088		$	(1,531	)	$	(810	)

Gains/(Losses) related to hedged items:
Fair value hedges:
Marketable securities	$	(1,018	)	$	167		$	—
Fixed-rate debt	(2,068		)	1,363			810
Total	$	(3,086	)	$	1,530		$	810

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 September 28, 2019 and September 29, 2018 (in millions):



	2019				2018
	Notional Amount		Credit Risk Amount		Notional Amount		Credit Risk Amount
Instruments designated as accounting hedges:
Foreign exchange contracts	$	61,795	$	1,798	$	65,368	$	1,015
Interest rate contracts	$	31,250	$	685	$	33,250	$	—

Instruments not designated as accounting hedges:
Foreign exchange contracts	$	76,868	$	323	$	63,062	$	259

Consolidated Financial Statement Details (Tables)

12 Months Ended

Sep. 28, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Property, Plant and Equipment, Net



	2019			2018
Land and buildings	$	17,085		$	16,216
Machinery, equipment and internal-use software	69,797			65,982
Leasehold improvements	9,075			8,205
Gross property, plant and equipment	95,957			90,403
Accumulated depreciation and amortization	(58,579		)	(49,099		)
Total property, plant and equipment, net	$	37,378		$	41,304

Other Non-Current Liabilities



	2019		2018
Long-term taxes payable	$	29,545	$	33,589
Other non-current liabilities	20,958		15,325
Total other non-current liabilities	$	50,503	$	48,914

Other Income/(Expense), Net

The following table shows the detail of OI&E for 2019, 2018 and 2017 (in millions):



	2019			2018			2017
Interest and dividend income	$	4,961		$	5,686		$	5,201
Interest expense	(3,576		)	(3,240		)	(2,323		)
Other income/(expense), net	422			(441		)	(133		)
Total other income/(expense), net	$	1,807		$	2,005		$	2,745

Income Taxes (Tables)

12 Months Ended

Sep. 28, 2019

Income Tax Disclosure [Abstract]

Provision for Income Taxes

The provision for income taxes for 2019, 2018 and 2017, consisted of the following (in millions):



	2019			2018			2017
Federal:
Current	$	6,384		$	41,425		$	7,842
Deferred	(2,939		)	(33,819		)	5,980
Total	3,445			7,606			13,822
State:
Current	475			551			259
Deferred	(67		)	48			2
Total	408			599			261
Foreign:
Current	3,962			3,986			1,671
Deferred	2,666			1,181			(16		)
Total	6,628			5,167			1,655
Provision for income taxes	$	10,481		$	13,372		$	15,738

Reconciliation of Provision for Income Taxes

A reconciliation of the provision for income taxes, with the amount computed by applying the statutory federal income tax rate (21% in 2019; 24.5% in 2018; 35% in 2017) to income before provision for income taxes for 2019, 2018 and 2017, is as follows (dollars in millions):



	2019			2018			2017
Computed expected tax	$	13,805		$	17,890		$	22,431
State taxes, net of federal effect	423			271			185
Impacts of the Act	—			1,515			—
Earnings of foreign subsidiaries	(2,625		)	(5,606		)	(6,135		)
Research and development credit, net	(548		)	(560		)	(678		)
Excess tax benefits from equity awards	(639		)	(675		)	—
Other	65			537			(65		)
Provision for income taxes	$	10,481		$	13,372		$	15,738
Effective tax rate	15.9		%	18.3		%	24.6		%

Significant Components of Deferred Tax Assets and Liabilities

As of September 28, 2019 and September 29, 2018, the significant components of the Company’s deferred tax assets and liabilities were (in millions):



	2019		2018
Deferred tax assets:
Amortization and depreciation	$	11,433	$	137
Accrued liabilities and other reserves	5,389		3,151
Deferred revenue	1,372		1,141
Share-based compensation	749		513
Unrealized losses	—		871
Other	697		797
Total deferred tax assets, net	19,640		6,610
Deferred tax liabilities:
Minimum tax on foreign earnings	10,809		—
Earnings of foreign subsidiaries	330		275
Other	456		501
Total deferred tax liabilities	11,595		776
Net deferred tax assets/(liabilities)	$	8,045	$	5,834

Aggregate Changes in Gross Unrecognized Tax Benefits, Excluding Interest and Penalties

The aggregate change in the balance of gross unrecognized tax benefits, which excludes interest and penalties, for 2019, 2018 and 2017, is as follows (in millions):



	2019			2018			2017
Beginning balances	$	9,694		$	8,407		$	7,724
Increases related to tax positions taken during a prior year	5,845			2,431			333
Decreases related to tax positions taken during a prior year	(686		)	(2,212		)	(952		)
Increases related to tax positions taken during the current year	1,697			1,824			1,880
Decreases related to settlements with taxing authorities	(852		)	(756		)	(539		)
Decreases related to expiration of the statute of limitations	(79		)	—			(39		)
Ending balances	$	15,619		$	9,694		$	8,407

Debt (Tables)

12 Months Ended

Sep. 28, 2019

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 2019, 2018 and 2017 (in millions):



	2019			2018			2017
Maturities 90 days or less:
Proceeds from/(Repayments of) commercial paper, net	$	(3,248	)	$	1,044		$	(1,782	)

Maturities greater than 90 days:
Proceeds from commercial paper	13,874			14,555			17,932
Repayments of commercial paper	(16,603		)	(15,636		)	(12,298		)
Proceeds from/(Repayments of) commercial paper, net	(2,729		)	(1,081		)	5,634

Total proceeds from/(repayments of) commercial paper, net	$	(5,977	)	$	(37	)	$	3,852

Summary of Term Debt

The following table provides a summary of the Company’s term debt as of September 28, 2019 and September 29, 2018:



	Maturities (calendar year)			2019								2018
	Maturities (calendar year)			Amount (in millions)			Effective Interest Rate					Amount (in millions)			Effective Interest Rate
2013–2018 debt issuances:
Floating-rate notes	2020	–	2022	$	4,250			2.25%	–	3.28	%	$	7,107			1.87%	–	3.44	%
Fixed-rate 0.350% – 4.650% notes	2019	–	2047	90,429				0.28%	–	4.78	%	97,086				0.28%	–	4.78	%

2019 debt issuance:
Fixed-rate 1.700% – 2.950% notes	2022	–	2049	7,000				1.71%	–	2.99	%	—						—	%
Total term debt				101,679								104,193

Unamortized premium/(discount) and issuance costs, net				(224		)						(218		)
Hedge accounting fair value adjustments				612								(1,456		)
Less: Current portion of term debt				(10,260		)						(8,784		)
Total non-current portion of term debt				$	91,807							$	93,735

Future Principal Payments for Notes

The future principal payments for the Company’s Notes as of September 28, 2019 are as follows (in millions):



2020	$	10,270
2021	8,750
2022	9,528
2023	9,290
2024	10,039
Thereafter	53,802
Total term debt	$	101,679

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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Shareholders' Equity (Tables)

12 Months Ended

Sep. 28, 2019

Shares of Common Stock

The following table shows the changes in shares of common stock for 2019, 2018 and 2017 (in thousands):



	2019		2018		2017
Common stock outstanding, beginning balances	4,754,986		5,126,201		5,336,166
Common stock repurchased	(345,205	)	(405,549	)	(246,496	)
Common stock issued, net of shares withheld for employee taxes	33,455		34,334		36,531
Common stock outstanding, ending balances	4,443,236		4,754,986		5,126,201

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

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Comprehensive Income (Tables)

12 Months Ended

Sep. 28, 2019

Pre-tax Amounts Reclassified from AOCI into the Consolidated Statements of Operations

The following table shows the pre-tax amounts reclassified from AOCI into the Consolidated Statements of Operations, and the associated financial statement line item, for 2019 and 2018 (in millions):



Comprehensive Income Components	Financial Statement Line Item	2019			2018
Unrealized (gains)/losses on derivative instruments:
Foreign exchange contracts	Total net sales	$	(206	)	$	214
	Total cost of sales	(482		)	(70		)
	Other income/(expense), net	784			344
Interest rate contracts	Other income/(expense), net	7			(2		)
		103			486
Unrealized (gains)/losses on marketable securities	Other income/(expense), net	31			(20		)
Total amounts reclassified from AOCI		$	134		$	466

Changes in AOCI by Component

The following table shows the changes in AOCI by component for 2019 and 2018 (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	(524		)	672			(4,563		)	(4,415		)
Amounts reclassified from AOCI	—			486			(20		)	466
Tax effect	(1		)	(253		)	1,177			923
Other comprehensive income/(loss)	(525		)	905			(3,406		)	(3,026		)
Cumulative effect of change in accounting principle	(176		)	29			(131		)	(278		)
Balances as of September 29, 2018	(1,055		)	810			(3,209		)	(3,454		)
Other comprehensive income/(loss) before reclassifications	(421		)	(949		)	4,854			3,484
Amounts reclassified from AOCI	—			103			31			134
Tax effect	13			208			(1,058		)	(837		)
Other comprehensive income/(loss)	(408		)	(638		)	3,827			2,781
Cumulative effect of change in accounting principle ⁽¹⁾	—			—			89			89
Balances as of September 28, 2019	$	(1,463	)	$	172		$	707		$	(584	)

(1)

Refer to Note 1, “Summary of Significant Accounting Policies” for more information on the Company’s adoption of ASU 2016-01 in 2019.

Benefit Plans (Tables)

12 Months Ended

Sep. 28, 2019

Share-based Payment Arrangement [Abstract]

Restricted Stock Unit Activity

A summary of the Company’s RSU activity and related information for 2019, 2018 and 2017, is as follows:



	Number of RSUs (in thousands)		Weighted-Average Grant Date Fair Value Per RSU		Aggregate Fair Value (in millions)
Balance as of September 24, 2016	99,089		$	97.54
RSUs granted	50,112		$	121.65
RSUs vested	(45,735	)	$	95.48
RSUs canceled	(5,895	)	$	106.87
Balance as of September 30, 2017	97,571		$	110.33
RSUs granted	45,351		$	162.86
RSUs vested	(44,718	)	$	111.24
RSUs canceled	(6,049	)	$	127.82
Balance as of September 29, 2018	92,155		$	134.60
RSUs granted	36,852		$	215.95
RSUs vested	(42,088	)	$	135.21
RSUs canceled	(5,402	)	$	162.85
Balance as of September 28, 2019	81,517		$	169.18	$	17,838

Summary of Share-Based Compensation Expense and the Related Income Tax Benefit

The following table shows share-based compensation expense and the related income tax benefit included in the Consolidated Statements of Operations for 2019, 2018 and 2017 (in millions):



	2019			2018			2017
Share-based compensation expense	$	6,068		$	5,340		$	4,840
Income tax benefit related to share-based compensation expense	$	(1,967	)	$	(1,893	)	$	(1,632	)

Commitments and Contingencies (Tables)

12 Months Ended

Sep. 28, 2019

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 2019, 2018 and 2017 (in millions):



	2019			2018			2017
Beginning accrued warranty and related costs	$	3,692		$	3,834		$	3,702
Cost of warranty claims	(3,857		)	(4,115		)	(4,322		)
Accruals for product warranty	3,735			3,973			4,454
Ending accrued warranty and related costs	$	3,570		$	3,692		$	3,834

Future Minimum Lease Payments Under Noncancelable Operating Leases

Future minimum lease payments under noncancelable operating leases having initial or remaining terms in excess of one year as of September 28, 2019, are as follows (in millions):



2020	$	1,306
2021	1,276
2022	1,137
2023	912
2024	834
Thereafter	5,373
Total	$	10,838

Future Payments Under Unconditional Purchase Obligations

Future payments under noncancelable unconditional purchase obligations having a remaining term in excess of one year as of September 28, 2019, are as follows (in millions):



2020	$	2,476
2021	2,386
2022	1,859
2023	1,162
2024	218
Thereafter	110
Total	$	8,211

Segment Information and Geographic Data (Tables)

12 Months Ended

Sep. 28, 2019

Segment Reporting [Abstract]

Summary Information by Reportable Segment

The following table shows information by reportable segment for 2019, 2018 and 2017 (in millions):



	2019		2018		2017
Americas:
Net sales	$	116,914	$	112,093	$	96,600
Operating income	$	35,099	$	34,864	$	30,684

Europe:
Net sales	$	60,288	$	62,420	$	54,938
Operating income	$	19,195	$	19,955	$	16,514

Greater China:
Net sales	$	43,678	$	51,942	$	44,764
Operating income	$	16,232	$	19,742	$	17,032

Japan:
Net sales	$	21,506	$	21,733	$	17,733
Operating income	$	9,369	$	9,500	$	8,097

Rest of Asia Pacific:
Net sales	$	17,788	$	17,407	$	15,199
Operating income	$	6,055	$	6,181	$	5,304

Reconciliation of Segment Operating Income to the Consolidated Statements of Operations

A reconciliation of the Company’s segment operating income to the Consolidated Statements of Operations for 2019, 2018 and 2017 is as follows (in millions):



	2019			2018			2017
Segment operating income	$	85,950		$	90,242		$	77,631
Research and development expense	(16,217		)	(14,236		)	(11,581		)
Other corporate expenses, net	(5,803		)	(5,108		)	(4,706		)
Total operating income	$	63,930		$	70,898		$	61,344

Net Sales and Long-lived Assets

Net sales for 2019, 2018 and 2017 and long-lived assets as of September 28, 2019 and September 29, 2018 were as follows (in millions):



	2019		2018		2017
Net sales:
U.S.	$	102,266	$	98,061	$	84,339
China⁽¹⁾	43,678		51,942		44,764
Other countries	114,230		115,592		100,131
Total net sales	$	260,174	$	265,595	$	229,234



	2019		2018
Long-lived assets:
U.S.	$	24,711	$	23,963
China ⁽¹⁾	9,064		13,268
Other countries	3,603		4,073
Total long-lived assets	$	37,378	$	41,304

(1)

China includes Hong Kong and Taiwan. Long-lived assets located in China consist primarily of product tooling and manufacturing process equipment and assets related to retail stores and related infrastructure.

Selected Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Sep. 28, 2019

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Information

The following tables show a summary of the Company’s quarterly financial information for each of the four quarters of 2019 and 2018 (in millions, except per share amounts):



	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
2019:
Total net sales	$	64,040	$	53,809	$	58,015	$	84,310
Gross margin	$	24,313	$	20,227	$	21,821	$	32,031
Net income	$	13,686	$	10,044	$	11,561	$	19,965

Earnings per share ⁽¹⁾:
Basic	$	3.05	$	2.20	$	2.47	$	4.22
Diluted	$	3.03	$	2.18	$	2.46	$	4.18



	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
2018:
Total net sales	$	62,900	$	53,265	$	61,137	$	88,293
Gross margin	$	24,084	$	20,421	$	23,422	$	33,912
Net income	$	14,125	$	11,519	$	13,822	$	20,065

Earnings per share ⁽¹⁾:
Basic	$	2.94	$	2.36	$	2.75	$	3.92
Diluted	$	2.91	$	2.34	$	2.73	$	3.89

(1)

Basic and diluted earnings per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017	Sep. 30, 2018	Oct. 01, 2017	Sep. 25, 2016
Significant Accounting Policies [Line Items]
Increase to net deferred tax assets upon adoption of ASU 2016-16	$ 8,045	$ 5,834
Reduction to other non-current assets upon adoption of ASU 2016-16	$ (32,978)	(22,283)
Potentially dilutive securities excluded from the computation of diluted earnings per share because their effect would have been antidilutive (in shares)	15.5
Depreciation and amortization expense on property and equipment	$ 11,300	9,300	$ 8,200
Non-cash investing activities involving property, plant and equipment, net increase/(decrease) to accounts payable and other current liabilities	$ (2,900)	$ 3,400
Building \| Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	30 years
Machinery and Equipment \| Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	1 year
Machinery and Equipment \| Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	5 years
Internal-Use Software \| Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	3 years
Internal-Use Software \| Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	5 years
Retained earnings
Significant Accounting Policies [Line Items]
Increase to retained earnings upon adoption of ASU 2016-16				$ 2,501	$ 278	$ 0
Accounting Standards Update 2016-16
Significant Accounting Policies [Line Items]
Increase to net deferred tax assets upon adoption of ASU 2016-16				2,700
Reduction to other non-current assets upon adoption of ASU 2016-16				128
Accounting Standards Update 2016-16 \| Retained earnings
Significant Accounting Policies [Line Items]
Increase to retained earnings upon adoption of ASU 2016-16				$ 2,600

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								12 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Numerator:
Net income	$ 13,686	$ 10,044	$ 11,561	$ 19,965	$ 14,125	$ 11,519	$ 13,822	$ 20,065	$ 55,256	$ 59,531	$ 48,351
Denominator:
Weighted-average basic shares outstanding (in shares)									4,617,834	4,955,377	5,217,242
Effect of dilutive securities (in shares)									31,079	44,732	34,450
Weighted-average diluted shares (in shares)									4,648,913	5,000,109	5,251,692
Basic earnings per share (in dollars per share)	$ 3.05	$ 2.20	$ 2.47	$ 4.22	$ 2.94	$ 2.36	$ 2.75	$ 3.92	$ 11.97	$ 12.01	$ 9.27
Diluted earnings per share (in dollars per share)	$ 3.03	$ 2.18	$ 2.46	$ 4.18	$ 2.91	$ 2.34	$ 2.73	$ 3.89	$ 11.89	$ 11.91	$ 9.21

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Revenue Recognition - Additional Information (Details) $ in Billions	Sep. 28, 2019 USD ($) obligation	Sep. 29, 2018 USD ($)
Revenue from Contract with Customer [Abstract]
Performance obligations in arrangements (up to) \| obligation	3
Total deferred revenue \| $	$ 8.1	$ 8.8

Revenue Recognition - Deferred Revenue, Expected Timing of Realization, Percentage (Details)	Sep. 28, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-09-29
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue, expected timing of realization, percentage	68.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-09-27
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue, expected timing of realization, percentage	25.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-09-26
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue, expected timing of realization, percentage	6.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-09-25
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue, expected timing of realization, percentage	1.00%

Revenue Recognition - Deferred Revenue, Expected Timing of Realization, Period (Details)	Sep. 28, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-09-29
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue, expected timing of realization, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-09-27
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue, expected timing of realization, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-09-26
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue, expected timing of realization, period	1 year

Revenue Recognition - Net Sales Disaggregated by Significant Products and Services (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 64,040	$ 53,809	$ 58,015	$ 84,310	$ 62,900	$ 53,265	$ 61,137	$ 88,293	$ 260,174	$ 265,595	$ 229,234
Revenue recognized that was included in deferred revenue at the beginning of the period									5,900	5,800	6,300
iPhone
Disaggregation of Revenue [Line Items]
Net sales									142,381	164,888	139,337
Mac
Disaggregation of Revenue [Line Items]
Net sales									25,740	25,198	25,569
iPad
Disaggregation of Revenue [Line Items]
Net sales									21,280	18,380	18,802
Wearables, Home and Accessories
Disaggregation of Revenue [Line Items]
Net sales									24,482	17,381	12,826
Services
Disaggregation of Revenue [Line Items]
Net sales									$ 46,291	$ 39,748	$ 32,700

Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	$ 204,977	$ 241,180
Unrealized Gains	1,202	209
Unrealized Losses	(281)	(4,289)
Fair Value	205,898	237,100
Cash and Cash Equivalents	48,844	25,913
Short-Term Marketable Securities	51,713	40,388
Long-Term Marketable Securities	105,341	170,799
Total cash, cash equivalents and marketable securities that were restricted from general use	18,900	20,300
Level 1
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	15,897	8,882
Unrealized Gains	0	0
Unrealized Losses	0	(116)
Fair Value	15,897	8,766
Cash and Cash Equivalents	15,897	8,083
Short-Term Marketable Securities	0	683
Long-Term Marketable Securities	0	0
Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	176,876	220,723
Unrealized Gains	1,202	209
Unrealized Losses	(281)	(4,173)
Fair Value	177,797	216,759
Cash and Cash Equivalents	20,743	6,255
Short-Term Marketable Securities	51,713	39,705
Long-Term Marketable Securities	105,341	170,799
Cash
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	12,204	11,575
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	12,204	11,575
Cash and Cash Equivalents	12,204	11,575
Short-Term Marketable Securities	0	0
Long-Term Marketable Securities	0	0
Money market funds \| Level 1
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	15,897	8,083
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	15,897	8,083
Cash and Cash Equivalents	15,897	8,083
Short-Term Marketable Securities	0	0
Long-Term Marketable Securities	0	0
Mutual funds \| Level 1
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost		799
Unrealized Gains		0
Unrealized Losses		(116)
Fair Value		683
Cash and Cash Equivalents		0
Short-Term Marketable Securities		683
Long-Term Marketable Securities		0
U.S. Treasury securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	30,293	47,296
Unrealized Gains	33	0
Unrealized Losses	(62)	(1,202)
Fair Value	30,264	46,094
Cash and Cash Equivalents	6,165	1,613
Short-Term Marketable Securities	9,817	7,606
Long-Term Marketable Securities	14,282	36,875
U.S. agency securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	9,767	4,127
Unrealized Gains	1	0
Unrealized Losses	(3)	(48)
Fair Value	9,765	4,079
Cash and Cash Equivalents	6,489	1,732
Short-Term Marketable Securities	2,249	360
Long-Term Marketable Securities	1,027	1,987
Non-U.S. government securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	19,821	21,601
Unrealized Gains	337	49
Unrealized Losses	(50)	(250)
Fair Value	20,108	21,400
Cash and Cash Equivalents	749	0
Short-Term Marketable Securities	3,168	3,355
Long-Term Marketable Securities	16,191	18,045
Certificates of deposit and time deposits \| Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	4,041	3,074
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	4,041	3,074
Cash and Cash Equivalents	2,024	1,247
Short-Term Marketable Securities	1,922	1,330
Long-Term Marketable Securities	95	497
Commercial paper \| Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	12,433	2,573
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	12,433	2,573
Cash and Cash Equivalents	5,193	1,663
Short-Term Marketable Securities	7,240	910
Long-Term Marketable Securities	0	0
Corporate debt securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	85,383	123,001
Unrealized Gains	756	152
Unrealized Losses	(92)	(2,038)
Fair Value	86,047	121,115
Cash and Cash Equivalents	123	0
Short-Term Marketable Securities	26,127	25,162
Long-Term Marketable Securities	59,797	95,953
Municipal securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	958	946
Unrealized Gains	8	0
Unrealized Losses	(1)	(12)
Fair Value	965	934
Cash and Cash Equivalents	0	0
Short-Term Marketable Securities	68	178
Long-Term Marketable Securities	897	756
Mortgage- and asset-backed securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	14,180	18,105
Unrealized Gains	67	8
Unrealized Losses	(73)	(623)
Fair Value	14,174	17,490
Cash and Cash Equivalents	0	0
Short-Term Marketable Securities	1,122	804
Long-Term Marketable Securities	$ 13,052	$ 16,686

Financial Instruments - Additional Information (Details) $ in Millions	12 Months Ended
	Sep. 28, 2019 USD ($) Vendor Customer	Sep. 29, 2018 USD ($) Vendor Customer
Financial Instruments [Line Items]
Non-marketable equity securities, carrying value	$ 2,900
Hedged interest rate transactions, expected recognition period	8 years
Fair value hedges, gains/(losses) excluded from effectiveness testing	$ 777
Potential reduction to derivative assets resulting from rights of set-off under master netting arrangements	2,700	$ 2,100
Potential reduction to derivative liabilities resulting from rights of set-off under master netting arrangements	2,700	2,100
Net derivative assets/(liabilities) after potential reductions under master netting arrangements	$ (407)	$ 138
Trade receivables \| Credit concentration risk
Financial Instruments [Line Items]
Number of customers that individually represented 10% or more of total trade receivables \| Customer	0	1
Trade receivables \| Credit concentration risk \| Customer one
Financial Instruments [Line Items]
Concentration risk, percentage	0.00%	10.00%
Trade receivables \| Credit concentration risk \| Cellular network carriers
Financial Instruments [Line Items]
Concentration risk, percentage	51.00%	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	2	2
Non-trade receivables \| Credit concentration risk \| Vendor one
Financial Instruments [Line Items]
Concentration risk, percentage	59.00%	62.00%
Non-trade receivables \| Credit concentration risk \| Vendor two
Financial Instruments [Line Items]
Concentration risk, percentage	14.00%	12.00%
Other current assets
Financial Instruments [Line Items]
Net cash collateral posted, derivative instruments		$ 1,000
Other current liabilities
Financial Instruments [Line Items]
Net cash collateral received, derivative instruments	$ 1,600
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 and marketable securities
Financial Instruments [Line Items]
Hedged foreign currency transactions, expected recognition period	23 years
Minimum
Financial Instruments [Line Items]
General maturities of long-term marketable securities	1 year
Maximum
Financial Instruments [Line Items]
General maturities of long-term marketable securities	5 years

Financial Instruments - Marketable Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Fair Value of Marketable Debt Securities
Continuous Unrealized Losses, Less than 12 Months	$ 28,151	$ 126,238
Continuous Unrealized Losses, 12 Months or Greater	28,167	60,599
Continuous Unrealized Losses, Total	56,318	186,837
Unrealized Losses
Continuous Unrealized Losses, Less than 12 Months	(138)	(2,400)
Continuous Unrealized Losses, 12 Months or Greater	(143)	(1,889)
Continuous Unrealized Losses, Total	$ (281)	$ (4,289)

Financial Instruments - Restricted Cash (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 48,844	$ 25,913
Restricted cash included in other current assets	23
Restricted cash included in other non-current assets	1,357
Cash, cash equivalents and restricted cash	$ 50,224	$ 25,913	$ 20,289	$ 20,484

Financial Instruments - Derivative Instruments at Gross Fair Value (Details) - Level 2 - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Other current assets and other non-current assets \| Foreign exchange contracts
Derivative assets:
Fair value of derivative assets	$ 2,121	$ 1,274
Other current assets and other non-current assets \| Interest rate contracts
Derivative assets:
Fair value of derivative assets	685
Other current assets and other non-current assets \| Derivatives designated as accounting hedges \| Foreign exchange contracts
Derivative assets:
Fair value of derivative assets	1,798	1,015
Other current assets and other non-current assets \| Derivatives designated as accounting hedges \| Interest rate contracts
Derivative assets:
Fair value of derivative assets	685
Other current assets and other non-current assets \| Derivatives not designated as accounting hedges \| Foreign exchange contracts
Derivative assets:
Fair value of derivative assets	323	259
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
Other current liabilities and other non-current liabilities \| Foreign exchange contracts
Derivative liabilities:
Fair value of derivative liabilities	1,501	680
Other current liabilities and other non-current liabilities \| Interest rate contracts
Derivative liabilities:
Fair value of derivative liabilities	105	1,456
Other current liabilities and other non-current liabilities \| Derivatives designated as accounting hedges \| Foreign exchange contracts
Derivative liabilities:
Fair value of derivative liabilities	1,341	543
Other current liabilities and other non-current liabilities \| Derivatives designated as accounting hedges \| Interest rate contracts
Derivative liabilities:
Fair value of derivative liabilities	105	1,456
Other current liabilities and other non-current liabilities \| Derivatives not designated as accounting hedges \| Foreign exchange contracts
Derivative liabilities:
Fair value of derivative liabilities	160	137
Other current liabilities 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 Gains and Losses of Derivative and Non-Derivative Instruments Designated as Hedges (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) recognized in OCI – effective portion	$ (959)	$ 683	$ 1,804
Gains/(Losses) reclassified from AOCI into net income – effective portion	(123)	(481)	1,956
Cash flow hedges \| Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) recognized in OCI – effective portion	(959)	682	1,797
Gains/(Losses) reclassified from AOCI into net income – effective portion	(116)	(482)	1,958
Cash flow hedges \| Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) recognized in OCI – effective portion	0	1	7
Gains/(Losses) reclassified from AOCI into net income – effective portion	(7)	1	(2)
Net investment hedges \| Foreign currency debt
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) recognized in OCI – effective portion	(58)	4	67
Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on derivative instruments designated as fair value hedges	3,088	(1,531)	(810)
Gains/(Losses) related to hedged items in fair value hedges	(3,086)	1,530	810
Fair value hedges \| Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on derivative instruments designated as fair value hedges	1,020	(168)	0
Gains/(Losses) related to hedged items in fair value hedges	(1,018)	167	0
Fair value hedges \| Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/(Losses) on derivative instruments designated as fair value hedges	2,068	(1,363)	(810)
Gains/(Losses) related to hedged items in fair value hedges	$ (2,068)	$ 1,363	$ 810

Financial Instruments - Notional Amounts and Credit Risk Amounts Associated with Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Derivatives designated as accounting hedges \| Foreign exchange contracts
Derivative [Line Items]
Derivative, notional amount	$ 61,795	$ 65,368
Derivative, credit risk amount	1,798	1,015
Derivatives designated as accounting hedges \| Interest rate contracts
Derivative [Line Items]
Derivative, notional amount	31,250	33,250
Derivative, credit risk amount	685	0
Derivatives not designated as accounting hedges \| Foreign exchange contracts
Derivative [Line Items]
Derivative, notional amount	76,868	63,062
Derivative, credit risk amount	$ 323	$ 259

Consolidated Financial Statement Details - Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 95,957	$ 90,403
Accumulated depreciation and amortization	(58,579)	(49,099)
Total property, plant and equipment, net	37,378	41,304
Land and buildings
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	17,085	16,216
Machinery, equipment and internal-use software
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	69,797	65,982
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 9,075	$ 8,205

Consolidated Financial Statement Details - Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Long-term taxes payable	$ 29,545	$ 33,589
Other non-current liabilities	20,958	15,325
Total other non-current liabilities	$ 50,503	$ 48,914

Consolidated Financial Statement Details - Other Income/(Expense), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest and dividend income	$ 4,961	$ 5,686	$ 5,201
Interest expense	(3,576)	(3,240)	(2,323)
Other income/(expense), net	422	(441)	(133)
Total other income/(expense), net	$ 1,807	$ 2,005	$ 2,745

Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Federal:
Current	$ 6,384	$ 41,425	$ 7,842
Deferred	(2,939)	(33,819)	5,980
Federal income tax expense/(benefit)	3,445	7,606	13,822
State:
Current	475	551	259
Deferred	(67)	48	2
State income tax expense/(benefit)	408	599	261
Foreign:
Current	3,962	3,986	1,671
Deferred	2,666	1,181	(16)
Foreign income tax expense/(benefit)	6,628	5,167	1,655
Provision for income taxes	$ 10,481	$ 13,372	$ 15,738

Income Taxes - Additional Information (Details) € in Millions, $ in Millions				12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Aug. 30, 2016 EUR (€) Subsidiary	Sep. 28, 2019 USD ($)	Sep. 28, 2019 EUR (€)	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 28, 2019 EUR (€)	Sep. 24, 2016 USD ($)
Income Tax Contingency [Line Items]
U.S. statutory federal income tax rate	21.00%	35.00%		21.00%	21.00%	24.50%	35.00%
Foreign pre-tax earnings				$ 44,300		$ 48,000	$ 44,700
Net excess tax benefits from equity awards							620
Gross unrecognized tax benefits				15,619		9,694	8,407		$ 7,724
Gross unrecognized tax benefits that would impact effective tax rate, if recognized				8,600		7,400
Reasonably possible decrease in gross unrecognized tax benefits over next 12 months				2,000
Gross interest and penalties accrued				1,300		1,400
Interest and penalty expense				$ 73		$ 489	$ 238
Unfavorable investigation outcome, EU State Aid rules
Income Tax Contingency [Line Items]
Number of subsidiaries impacted by the European Commission tax ruling \| Subsidiary			2
Maximum potential loss related to European Commission tax ruling \| €			€ 13,100					€ 12,900
Reduction in potential loss related to European Commission tax ruling \| €					€ 190
Unfavorable investigation outcome, EU State Aid rules - interest component
Income Tax Contingency [Line Items]
Maximum potential loss related to European Commission tax ruling \| €			€ 1,200

Income Taxes - Reconciliation of the Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Computed expected tax	$ 13,805	$ 17,890	$ 22,431
State taxes, net of federal effect	423	271	185
Impacts of the Act	0	1,515	0
Earnings of foreign subsidiaries	(2,625)	(5,606)	(6,135)
Research and development credit, net	(548)	(560)	(678)
Excess tax benefits from equity awards	(639)	(675)	0
Other	65	537	(65)
Provision for income taxes	$ 10,481	$ 13,372	$ 15,738
Effective tax rate	15.90%	18.30%	24.60%

Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Deferred tax assets:
Amortization and depreciation	$ 11,433
Amortization and depreciation		$ 137
Accrued liabilities and other reserves	5,389	3,151
Deferred revenue	1,372	1,141
Share-based compensation	749	513
Unrealized losses	0	871
Other	697	797
Total deferred tax assets, net	19,640	6,610
Deferred tax liabilities:
Minimum tax on foreign earnings	10,809	0
Earnings of foreign subsidiaries	330	275
Other	456	501
Total deferred tax liabilities	11,595	776
Net deferred tax assets	$ 8,045	$ 5,834

Income Taxes - Aggregate Changes in Gross Unrecognized Tax Benefits, Excluding Interest and Penalties (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balances	$ 9,694	$ 8,407	$ 7,724
Increases related to tax positions taken during a prior year	5,845	2,431	333
Decreases related to tax positions taken during a prior year	(686)	(2,212)	(952)
Increases related to tax positions taken during the current year	1,697	1,824	1,880
Decreases related to settlements with taxing authorities	(852)	(756)	(539)
Decreases related to expiration of the statute of limitations	(79)	0	(39)
Ending balances	$ 15,619	$ 9,694	$ 8,407

Debt - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Debt Instrument [Line Items]
Commercial paper	$ 5,980	$ 11,964
Commercial paper, general maturity period (less than)	9 months
Commercial paper, weighted-average interest rate	2.24%	2.18%
Floating- and fixed-rate notes, aggregate principal amount	$ 101,679	$ 104,193
Interest cost on term debt	3,200	3,000	$ 2,200
Level 2
Debt Instrument [Line Items]
Floating- and fixed-rate notes, aggregate fair value	107,500	103,200
Net investment hedges
Debt Instrument [Line Items]
Carrying value of debt designated as a net investment hedge	$ 1,000	$ 811

Debt - Summary of Cash Flows Associated with Commercial Paper (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Maturities 90 days or less:
Proceeds from/(Repayments of) commercial paper, net	$ (3,248)	$ 1,044	$ (1,782)
Maturities greater than 90 days:
Proceeds from commercial paper	13,874	14,555	17,932
Repayments of commercial paper	(16,603)	(15,636)	(12,298)
Proceeds from/(Repayments of) commercial paper, net	(2,729)	(1,081)	5,634
Total proceeds from/(repayments of) commercial paper, net	$ (5,977)	$ (37)	$ 3,852

Debt - Summary of Term Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
Debt Instrument [Line Items]
Total term debt	$ 101,679	$ 104,193
Unamortized premium/(discount) and issuance costs, net	(224)	(218)
Hedge accounting fair value adjustments	612	(1,456)
Less: Current portion of term debt	(10,260)	(8,784)
Total non-current portion of term debt	91,807	93,735
2013–2018 debt issuances \| Floating-rate notes
Debt Instrument [Line Items]
Total term debt	$ 4,250	$ 7,107
Debt instrument, maturity year (calendar), start	2020
Debt instrument, maturity year (calendar), end	2022
2013–2018 debt issuances \| Floating-rate notes \| Minimum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	2.25%	1.87%
2013–2018 debt issuances \| Floating-rate notes \| Maximum
Debt Instrument [Line Items]
Debt instrument, effective interest rate	3.28%	3.44%
2013–2018 debt issuances \| Fixed-rate notes
Debt Instrument [Line Items]
Total term debt	$ 90,429	$ 97,086
Debt instrument, maturity year (calendar), start	2019
Debt instrument, maturity year (calendar), end	2047
2013–2018 debt issuances \| Fixed-rate notes \| Minimum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	0.35%
Debt instrument, effective interest rate	0.28%	0.28%
2013–2018 debt issuances \| Fixed-rate notes \| Maximum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.65%
Debt instrument, effective interest rate	4.78%	4.78%
2019 debt issuance \| Fixed-rate notes
Debt Instrument [Line Items]
Total term debt	$ 7,000	$ 0
Debt instrument, maturity year (calendar), start	2022
Debt instrument, maturity year (calendar), end	2049
Debt instrument, effective interest rate		0.00%
2019 debt issuance \| Fixed-rate notes \| Minimum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	1.70%
Debt instrument, effective interest rate	1.71%
2019 debt issuance \| Fixed-rate notes \| Maximum
Debt Instrument [Line Items]
Debt instrument, stated interest rate	2.95%
Debt instrument, effective interest rate	2.99%

Debt - Future Principal Payments for Term Debt (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Debt Disclosure [Abstract]
2020	$ 10,270
2021	8,750
2022	9,528
2023	9,290
2024	10,039
Thereafter	53,802
Total term debt	$ 101,679	$ 104,193

Shareholders' Equity - Additional Information (Details) - USD ($) shares in Millions	12 Months Ended
	Sep. 28, 2019	Apr. 30, 2019	Apr. 29, 2019
Share Repurchase Program [Line Items]
Maximum amount authorized for repurchase of common stock		$ 175,000,000,000	$ 100,000,000,000
Share repurchase program, amount utilized	$ 96,100,000,000
Number of shares repurchased (in shares)	345.2
Amount of share repurchases	$ 67,100,000,000
February 2019 accelerated share repurchase arrangement
Share Repurchase Program [Line Items]
Number of shares repurchased (in shares)	62.0
Amount of share repurchases, accelerated share repurchase arrangement	$ 12,000,000,000.0

Shareholders' Equity - Shares of Common Stock (Details) - shares shares in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock outstanding, beginning balances (in shares)	4,754,986
Common stock repurchased (in shares)	(345,200)
Common stock outstanding, ending balances (in shares)	4,443,236	4,754,986
Common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock outstanding, beginning balances (in shares)	4,754,986	5,126,201	5,336,166
Common stock repurchased (in shares)	(345,205)	(405,549)	(246,496)
Common stock issued, net of shares withheld for employee taxes (in shares)	33,455	34,334	36,531
Common stock outstanding, ending balances (in shares)	4,443,236	4,754,986	5,126,201

Comprehensive Income - Pre-tax Amounts Reclassified from AOCI into Consolidated Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total cost of sales	$ 161,782	$ 163,756	$ 141,048
Other income/(expense), net	(1,807)	(2,005)	(2,745)
Total amounts reclassified from AOCI	(65,737)	(72,903)	$ (64,089)
Reclassifications out of AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total amounts reclassified from AOCI	134	466
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	103	486
Reclassifications out of AOCI \| Unrealized (gains)/losses on derivative instruments \| Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total net sales	(206)	214
Total cost of sales	(482)	(70)
Other income/(expense), net	784	344
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	7	(2)
Reclassifications out of AOCI \| Unrealized (gains)/losses on marketable securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income/(expense), net	$ 31	$ (20)

Comprehensive Income - Change in AOCI by Component (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017	Sep. 30, 2018	Oct. 01, 2017	Sep. 25, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	$ 107,147	$ 134,047	$ 128,249
Total other comprehensive income/(loss)	2,781	(3,026)	(784)
Ending balances	90,488	107,147	134,047
Cumulative Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(1,055)	(354)
Other comprehensive income/(loss) before reclassifications	(421)	(524)
Amounts reclassified from AOCI	0	0
Tax effect	13	(1)
Total other comprehensive income/(loss)	(408)	(525)
Cumulative effect of change in accounting principle		(176)
Ending balances	(1,463)	(1,055)	(354)
Unrealized Gains/Losses on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	810	(124)
Other comprehensive income/(loss) before reclassifications	(949)	672
Amounts reclassified from AOCI	103	486
Tax effect	208	(253)
Total other comprehensive income/(loss)	(638)	905
Cumulative effect of change in accounting principle		29
Ending balances	172	810	(124)
Unrealized Gains/Losses on Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(3,209)	328
Other comprehensive income/(loss) before reclassifications	4,854	(4,563)
Amounts reclassified from AOCI	31	(20)
Tax effect	(1,058)	1,177
Total other comprehensive income/(loss)	3,827	(3,406)
Cumulative effect of change in accounting principle		(131)
Ending balances	707	(3,209)	328
Total AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balances	(3,454)	(150)	634
Other comprehensive income/(loss) before reclassifications	3,484	(4,415)
Amounts reclassified from AOCI	134	466
Tax effect	(837)	923
Total other comprehensive income/(loss)	2,781	(3,026)	(784)
Cumulative effect of change in accounting principle		(278)
Cumulative effects of changes in accounting principles				$ 89	$ (278)	$ 0
Ending balances	$ (584)	$ (3,454)	$ (150)
Accounting Standards Update 2016-01 \| Cumulative Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effects of changes in accounting principles				0
Accounting Standards Update 2016-01 \| Unrealized Gains/Losses on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effects of changes in accounting principles				0
Accounting Standards Update 2016-01 \| Unrealized Gains/Losses on Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effects of changes in accounting principles				89
Accounting Standards Update 2016-01 \| Total AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effects of changes in accounting principles				$ 89

Benefit Plans - Additional Information (Details)	12 Months Ended
Benefit Plans - Additional Information (Details)	Sep. 28, 2019 USD ($) shares	Sep. 29, 2018 USD ($) shares	Sep. 30, 2017 USD ($) shares	Mar. 29, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum portion of pre-tax earnings under 401(k) Plan that can be deferred by participating U.S. employees	$ 19,000
Taxes paid related to net share settlement of equity awards	2,817,000,000	$ 2,527,000,000	$ 1,874,000,000
Total unrecognized compensation cost related to RSUs and stock options	$ 10,500,000,000
Total unrecognized compensation cost related to RSUs and stock options, weighted-average recognition period	2 years 6 months
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution to 401(k) Plan as a percentage of employee's contribution	50.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer matching contribution to 401(k) Plan as a percentage of employee's contribution	100.00%
Employer matching contribution to 401(k) Plan as a percentage of employee's eligible earnings	6.00%
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of RSUs as of the respective vesting dates	$ 8,600,000,000	$ 7,600,000,000	$ 6,100,000,000
The total shares withheld upon vesting of RSUs (in shares) \| shares	14,800,000	16,000,000.0	15,400,000
Taxes paid related to net share settlement of equity awards	$ 3,000,000,000.0	$ 2,700,000,000	$ 2,000,000,000.0
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee common stock purchases through payroll deductions, price as a percentage of fair market value	85.00%
Employee Stock Purchase Plan offering period	6 months
Payroll deductions as a percentage of employee compensation, maximum	10.00%
Employee Stock Purchase Plan, maximum annual purchase amount per employee	$ 25,000
Shares reserved for future issuance under stock plans (in shares) \| shares	31,100,000
2014 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for future issuance under stock plans (in shares) \| shares				385,000,000
Shares reserved for future issuance under stock plans (in shares) \| shares	246,400,000
2014 Employee Stock Plan \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based award, vesting period	4 years
Number of shares of common stock issued per RSU upon vesting	1
Factor by which each RSU granted reduces, and each RSU canceled or share withheld for taxes increases, the number of shares available for grant	2
Non-Employee Director Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance under stock plans (in shares) \| shares	1,100,000
Non-Employee Director Stock Plan \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Factor by which each RSU granted reduces, and each RSU canceled or share withheld for taxes increases, the number of shares available for grant	2

Benefit Plans - Restricted Stock Units Activity and Related Information (Details) - Restricted stock units - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Number of Restricted Stock Units
Beginning balance (in shares)	92,155	97,571	99,089
RSUs granted (in shares)	36,852	45,351	50,112
RSUs vested (in shares)	(42,088)	(44,718)	(45,735)
RSUs canceled (in shares)	(5,402)	(6,049)	(5,895)
Ending balance (in shares)	81,517	92,155	97,571
Weighted-Average Grant Date Fair Value Per RSU
Beginning balance (in dollars per share)	$ 134.60	$ 110.33	$ 97.54
RSUs granted (in dollars per share)	215.95	162.86	121.65
RSUs vested (in dollars per share)	135.21	111.24	95.48
RSUs canceled (in dollars per share)	162.85	127.82	106.87
Ending balance (in dollars per share)	$ 169.18	$ 134.60	$ 110.33
Aggregate Fair Value
Aggregate fair value of RSUs	$ 17,838

Benefit Plans - Summary of Share-Based Compensation Expense and the Related Income Tax Benefit (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Share-based Payment Arrangement [Abstract]
Share-based compensation expense	$ 6,068	$ 5,340	$ 4,840
Income tax benefit related to share-based compensation expense	$ (1,967)	$ (1,893)	$ (1,632)

Commitments and Contingencies - Changes in Accrued Warranties and Related Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Changes in Accrued Warranties and Related Costs [Roll Forward]
Beginning accrued warranty and related costs	$ 3,692	$ 3,834	$ 3,702
Cost of warranty claims	(3,857)	(4,115)	(4,322)
Accruals for product warranty	3,735	3,973	4,454
Ending accrued warranty and related costs	$ 3,570	$ 3,692	$ 3,834

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions			12 Months Ended
	Apr. 11, 2018	Sep. 30, 2016	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Commitments and Contingencies Disclosure [Line Items]
Total future minimum lease payments under noncancelable operating leases			$ 10,838
Typical term of leases (not exceeding)			10 years
Rent expense under cancelable and noncancelable operating leases			$ 1,300	$ 1,200	$ 1,100
VirnetX I \| Pending Litigation
Commitments and Contingencies Disclosure [Line Items]
Award from legal proceedings, due to other party		$ 302
Award from legal proceeding, due to other party, revised amount, determined in subsequent proceedings		$ 440
VirnetX II \| Pending Litigation
Commitments and Contingencies Disclosure [Line Items]
Award from legal proceedings, due to other party	$ 503

Commitments and Contingencies - Future Minimum Lease Payments Under Noncancelable Operating Leases (Details) $ in Millions	Sep. 28, 2019 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2020	$ 1,306
2021	1,276
2022	1,137
2023	912
2024	834
Thereafter	5,373
Total	$ 10,838

Commitments and Contingencies - Future Payments Under Unconditional Purchase Obligations (Details) $ in Millions	Sep. 28, 2019 USD ($)
Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2020	$ 2,476
2021	2,386
2022	1,859
2023	1,162
2024	218
Thereafter	110
Total	$ 8,211

Segment Information and Geographic Data - Summary Information by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 64,040	$ 53,809	$ 58,015	$ 84,310	$ 62,900	$ 53,265	$ 61,137	$ 88,293	$ 260,174	$ 265,595	$ 229,234
Operating income									63,930	70,898	61,344
Americas
Segment Reporting Information [Line Items]
Net sales									116,914	112,093	96,600
Operating income									35,099	34,864	30,684
Europe
Segment Reporting Information [Line Items]
Net sales									60,288	62,420	54,938
Operating income									19,195	19,955	16,514
Greater China
Segment Reporting Information [Line Items]
Net sales									43,678	51,942	44,764
Operating income									16,232	19,742	17,032
Japan
Segment Reporting Information [Line Items]
Net sales									21,506	21,733	17,733
Operating income									9,369	9,500	8,097
Rest of Asia Pacific
Segment Reporting Information [Line Items]
Net sales									17,788	17,407	15,199
Operating income									$ 6,055	$ 6,181	$ 5,304

Segment Information and Geographic Data - Reconciliation of Segment Operating Income to Consolidated Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ 63,930	$ 70,898	$ 61,344
Research and development expense	(16,217)	(14,236)	(11,581)
Operating segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	85,950	90,242	77,631
Segment reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Research and development expense	(16,217)	(14,236)	(11,581)
Corporate non-segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Other corporate expenses, net	$ (5,803)	$ (5,108)	$ (4,706)

Segment Information and Geographic Data - Net Sales (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 64,040	$ 53,809	$ 58,015	$ 84,310	$ 62,900	$ 53,265	$ 61,137	$ 88,293	$ 260,174	$ 265,595	$ 229,234
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									102,266	98,061	84,339
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									43,678	51,942	44,764
Other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 114,230	$ 115,592	$ 100,131

Segment Information and Geographic Data - Long-Lived Assets (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 37,378	$ 41,304
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	24,711	23,963
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	9,064	13,268
Other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 3,603	$ 4,073

Selected Quarterly Financial Information (Unaudited) - Summary of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Selected Quarterly Financial Information [Abstract]
Net sales	$ 64,040	$ 53,809	$ 58,015	$ 84,310	$ 62,900	$ 53,265	$ 61,137	$ 88,293	$ 260,174	$ 265,595	$ 229,234
Gross margin	24,313	20,227	21,821	32,031	24,084	20,421	23,422	33,912	98,392	101,839	88,186
Net income	$ 13,686	$ 10,044	$ 11,561	$ 19,965	$ 14,125	$ 11,519	$ 13,822	$ 20,065	$ 55,256	$ 59,531	$ 48,351
Earnings per share:
Basic (in dollars per share)	$ 3.05	$ 2.20	$ 2.47	$ 4.22	$ 2.94	$ 2.36	$ 2.75	$ 3.92	$ 11.97	$ 12.01	$ 9.27
Diluted (in dollars per share)	$ 3.03	$ 2.18	$ 2.46	$ 4.18	$ 2.91	$ 2.34	$ 2.73	$ 3.89	$ 11.89	$ 11.91	$ 9.21

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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