Skyworks Solutions (SWKS) 10-Q 31 Jan 24 2024 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - $ / shares	3 Months Ended
	Dec. 29, 2023	Jan. 24, 2024
Cover [Abstract]
Document Type	10-Q
Document Period End Date	Dec. 29, 2023
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-05560
Entity Registrant Name	Skyworks Solutions, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-2302115
Entity Address, Address Line One	5260 California Avenue
Entity Address, City or Town	Irvine
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92617
City Area Code	(949)
Local Phone Number	231-3000
Title of 12(b) Security	Common Stock, par value $0.25 per share
Trading Symbol	SWKS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		160,225,891
Entity Listing, Par Value Per Share	$ 0.25
Entity Central Index Key	0000004127
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--09-27

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Income Statement [Abstract]
Document Period End Date	Dec. 29, 2023
Net revenue	$ 1,201.5	$ 1,329.3
Cost of goods sold	694.9	691.6
Gross profit	506.6	637.7
Operating expenses:
Research and development	153.1	163.9
Selling, general, and administrative	78.8	84.5
Amortization of intangible assets operating expenses	0.2	21.9
Restructuring Costs and Asset Impairment Charges	16.2	0.4
Total operating expenses	248.3	270.7
Operating income	258.3	367
Interest Expense	(10)	(16.9)
Other income, net	3.4	0.6
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	251.7	350.7
Provision for income taxes	20.4	41.3
Net income	$ 231.3	$ 309.4
Earnings per share:
Basic (in dollars per share)	$ 1.45	$ 1.94
Diluted (in dollars per share)	$ 1.44	$ 1.93
Weighted average shares:
Basic (in shares)	159.9	159.8
Diluted (in shares)	161	160.2
Common Stock, Dividends, Per Share, Declared	$ 0.68	$ 0.62

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 231.3	$ 309.4
Other comprehensive income (loss), net of tax:
Fair value of investments	0.1	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	(0.2)	(0.8)
Comprehensive income	$ 231.2	$ 308.6

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2023	Sep. 29, 2023
Statement of Financial Position [Abstract]
Document Period End Date	Dec. 29, 2023
Current assets:
Cash and cash equivalents	$ 1,029,700	$ 718,800
Marketable Securities, Current	15,900	15,600
Receivables, net of allowances of $0.9 and $0.8, respectively	659,400	864,300
Inventory	926,800	1,119,700
Other current assets	454,800	461,100
Total current assets	3,086,600	3,179,500
Property, plant, and equipment, net	1,342,700	1,390,100
Operating Lease, Right-of-Use Asset	204,200	205,400
Goodwill	2,176,700	2,176,700
Intangible assets, net	1,162,400	1,222,100
Deferred Income Tax Assets, Net	193,600	192,300
Marketable Securities, Noncurrent	2,000	4,100
Other long-term assets	60,900	56,500
Total assets	8,229,100	8,426,700
Current liabilities:
Accounts payable	135,700	159,200
Accrued compensation and benefits	95,200	94,300
Debt, Current	0	299,400
Other current liabilities	384,200	402,800
Total current liabilities	615,100	955,700
Long-term Debt	993,200	992,900
Long-term tax liabilities	161,500	162,800
Operating Lease, Liability, Noncurrent	191,400	188,700
Other long-term liabilities	40,700	43,900
Total liabilities	2,001,900	2,344,000
Stockholders’ equity:
Preferred stock, no par value: 25.0 shares authorized, no shares issued	0	0
Common stock, $0.25 par value: 525.0 shares authorized; 160.2 shares issued and outstanding at December 29, 2023, and 159.5 shares issued and outstanding at September 29, 2023	40,100	39,900
Additional paid-in capital	194,400	172,400
Retained earnings	5,998,400	5,876,000
Accumulated other comprehensive loss	(5,700)	(5,600)
Total stockholders’ equity	6,227,200	6,082,700
Total liabilities and stockholders’ equity	$ 8,229,100	$ 8,426,700

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 29, 2023	Sep. 29, 2023
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ 0.9	$ 0.8
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0.25	$ 0.25
Preferred Stock, Shares Authorized	25	25
Preferred Stock, Shares Issued	0	0
Common Stock, Shares Authorized	525	525
Common Stock, Shares, Issued	160.2	159.5
Common Stock, Shares, Outstanding	160.2	159.5

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Statement of Cash Flows [Abstract]
Document Period End Date	Dec. 29, 2023
Net income	$ 231,300	$ 309,400
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	53,300	49,400
Depreciation	64,700	99,400
Amortization	48,100	72,000
Deferred income taxes	(2,600)	(29,900)
Asset Impairment Charges	16,100	0
Amortization of Debt Issuance Costs and Discounts	1,900	700
Other Noncash Income (Expense)	(4,400)	0
Changes in assets and liabilities:
Receivables, net	204,900	329,900
Inventory	192,200	(55,800)
Accounts payable	(18,700)	(87,800)
Other current and long-term assets and liabilities	(11,900)	86,100
Net Cash Provided by (Used in) Operating Activities	774,900	773,400
Cash flows from investing activities:
Payments to Acquire Property, Plant, and Equipment	22,200	63,500
Payments to Acquire Marketable Securities	(1,100)	(163,100)
Payments to Acquire Intangible Assets	7,600	7,800
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale	3,200	11,300
Payments for (Proceeds from) Other Investing Activities	4,200	0
Net Cash Provided by (Used in) Investing Activities	(23,500)	(223,100)
Cash flows from financing activities:
Repurchase of common stock - payroll tax withholdings on equity awards	(32,700)	(31,900)
Repurchase of common stock - stock repurchase program	0	(166,200)
Dividends paid	(108,900)	(99,400)
Net proceeds from exercise of stock options	1,100	1,100
Repayments of Long-term Debt	(300,000)	0
Net Cash Provided by (Used in) Financing Activities	(440,500)	(296,400)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	310,900	253,900
Cash and cash equivalents at beginning of period	718,800	566,000
Cash and cash equivalents at end of period	1,029,700	819,900
Supplemental cash flow disclosures:
Income taxes paid	5,100	3,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	15,000	23,300
Stock Issued	1,200	19,200
Capital Expenditures Incurred but Not yet Paid	7,400	37,200
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 4,900	$ 500

Statement of Stockholders Equit

Statement of Stockholders Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common
Common Stock, Shares, Outstanding		160,200
Stockholders' Equity Attributable to Parent	$ 5,469,000	$ 40,000	$ 11,900	$ 5,421,900	$ (4,800)	$ 0
Treasury Stock, Common, Shares						0
Net income	309,400			309,400
StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxes(inshares)		700				300
StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes	(11,700)	$ 200	20,000			$ (31,900)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	49,700		49,700
Stock Repurchased and Retired During Period, Value				(120,000)
Stock Repurchased During Period, Value	166,300	$ 500	77,700			$ (31,900)
Stock Repurchased During Period, Shares		(1,800)				(300)
Dividends	(99,400)			(99,400)
Other Comprehensive Income (Loss), Net of Tax	800				(800)
Treasury Stock, Value, Acquired, Par Value Method	$ 166,200
Treasury Stock, Shares, Acquired	1,800
Common Stock, Shares, Outstanding		159,100
Stockholders' Equity Attributable to Parent	$ 5,549,900	$ 39,700	3,900	5,511,900	(5,600)	$ 0
Treasury Stock, Common, Shares						0
Common Stock, Shares, Outstanding	159,500	159,500
Stockholders' Equity Attributable to Parent	$ 6,082,700	$ 39,900	172,400	5,876,000	(5,600)	$ 0
Treasury Stock, Common, Shares						0
Net income	231,300			231,300
StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxes(inshares)		700				400
StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes	(30,400)	$ 200	2,100			$ (32,700)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	52,600		52,600
Stock Repurchased and Retired During Period, Shares		0				(400)
Stock Repurchased and Retired During Period, Value	0	$ 0	(32,700)	0		$ (32,700)
Dividends	(108,900)			(108,900)
Other Comprehensive Income (Loss), Net of Tax	$ 100				(100)
Common Stock, Shares, Outstanding	160,200	160,200
Stockholders' Equity Attributable to Parent	$ 6,227,200	$ 40,100	$ 194,400	$ 5,998,400	$ (5,700)	$ 0
Remaining amount authorized fro stock repurchase	$ 2,000,000
Treasury Stock, Common, Shares						0

Description Of Business and Bas

Description Of Business and Basis Of Presentation	3 Months Ended
	Dec. 29, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies	DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION, AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Skyworks Solutions, Inc., together with its consolidated subsidiaries (“Skyworks” or the “Company”), is empowering the wireless networking revolution. The Company’s analog and mixed-signal semiconductors are connecting people, places, and things, spanning a number of new applications within the aerospace, automotive, broadband, cellular infrastructure, connected home, defense, entertainment and gaming, industrial, medical, smartphone, tablet, and wearable markets. The accompanying unaudited interim consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial reporting. Certain information and footnote disclosures, normally included in annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”), have been condensed or omitted pursuant to those rules and regulations. However, in management’s opinion, the financial information reflects all adjustments, including those of a normal recurring nature, necessary to present fairly the results of operations, financial position, and cash flows of the Company for the periods presented. The results of operations, financial position, and cash flows for the Company during the interim periods are not necessarily indicative of those expected for the full year. This information should be read in conjunction with the Company’s financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended September 29, 2023, filed with the SEC on November 17, 2023, as amended by Amendment No. 1 to such Annual Report on Form 10-K, filed with the SEC on January 25, 2024 (“2023 10-K”). Certain items in the prior period financial statements have been reclassified to conform to the current period presentation. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts of assets, liabilities, revenue, expenses, comprehensive income, and accumulated other comprehensive loss that are reported during the reporting period. The Company evaluates its estimates on an ongoing basis using historical experience and other factors, including the current economic environment. Judgment is required in determining the reserves for, and fair value of, items such as overall fair value assessments of assets and liabilities, particularly those classified as Level 2 or Level 3 in the fair value hierarchy, marketable securities, inventory, intangible assets associated with business combinations, share-based compensation, revenue reserves, loss contingencies, and income taxes. In addition, judgment is required in determining whether a potential indicator of impairment of long-lived assets exists and in estimating future cash flows for any necessary impairment testing. Actual results could differ significantly from these estimates. The Company’s fiscal year ends on the Friday closest to September 30. The fiscal year ending on September 27, 2024 consists of 52 weeks (“fiscal 2024”). The fiscal year ended on September 29, 2023 consisted of 52 weeks (“fiscal 2023”). The three months ended December 29, 2023, and December 30, 2022, each consisted of 13 weeks. Property, Plant, and Equipment Property, plant, and equipment are carried at cost less accumulated depreciation, with significant renewals and betterments being capitalized and retired equipment written off in the respective periods. Maintenance and repairs are expensed as incurred. Depreciation is calculated using the straight-line method over the estimated useful lives, which range from five to forty years for buildings and improvements and from five to ten years for machinery and equipment. Leasehold improvements are depreciated over the lesser of the economic life or the life of the associated lease. During the three months ended December 29, 2023, the Company changed its accounting estimate for the expected useful lives of certain machinery and equipment. The Company evaluated its current asset base and reassessed the estimated useful lives of certain machinery and equipment in connection with its recent usage of older equipment, including considering the technological and physical obsolescence of such machinery and equipment. Based on its ability to re-use equipment across generations of process technologies and historical usage trends, the Company determined that the expected useful lives for certain machinery and equipment should be increased by up to two years to reflect more closely the estimated economic lives of those assets. This change in estimate was applied prospectively effective for the first quarter of fiscal 2024 and resulted in a decrease in depreciation expense of $22.9 million for the three months ended December 29, 2023. This benefit increased income from operations by $2.6 million and decreased ending inventory by $20.3 million as of December 29, 2023. As a result of this change in accounting estimate, net income increased by $2.6 million and diluted earnings per share increased by $0.02 for the three months ended December 29, 2023.

Marketable Securities

Marketable Securities	3 Months Ended
	Dec. 29, 2023
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	3. MARKETABLE SECURITIES The Company’s portfolio of available-for-sale marketable securities consists of the following (in millions): Current Noncurrent December 29, 2023 September 29, 2023 December 29, 2023 September 29, 2023 U.S. Treasury and government securities $ 15.7 $ 15.1 $ 2.0 $ 4.1 Corporate bonds and notes 0.2 — — — Municipal bonds — 0.5 — — Total marketable securities $ 15.9 $ 15.6 $ 2.0 $ 4.1

Fair Value

Fair Value	3 Months Ended
	Dec. 29, 2023
Fair Value Disclosures [Abstract]
FAIR VALUE	4. FAIR VALUE Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis The Company groups its financial assets and liabilities measured at fair value on a recurring basis in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are: • Level 1 - Quoted prices in active markets for identical assets or liabilities. • Level 2 - Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets with insufficient volume or infrequent transactions (less-active markets), or model-driven valuations in which all significant inputs are observable or can be derived principally from, or corroborated with, observable market data. • Level 3 - Fair value is derived from valuation techniques in which one or more significant inputs are unobservable, including assumptions and judgments made by the Company. Assets and liabilities recorded at fair value on a recurring basis consisted of the following (in millions): As of December 29, 2023 September 29, 2023 Fair Value Measurements Fair Value Measurements Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Assets Cash and cash equivalents (1) $ 1,029.7 $ 1,029.6 $ 0.1 $ — $ 718.8 $ 718.5 $ 0.3 $ — U.S. Treasury and government securities 17.7 0.4 17.3 — 19.2 — 19.2 — Corporate bonds and notes 0.2 — 0.2 — — — — — Municipal bonds — — — — 0.5 — 0.5 — Total assets at fair value $ 1,047.6 $ 1,030.0 $ 17.6 $ — $ 738.5 $ 718.5 $ 20.0 $ — (1) Cash equivalents included in Levels 1 and 2 consist of money market funds and corporate bonds and notes, commercial paper, and agency securities purchased with less than ninety days until maturity. Assets Measured and Recorded at Fair Value on a Nonrecurring Basis The Company’s non-financial assets and liabilities, such as goodwill, intangible assets, and other long-lived assets resulting from business combinations, are measured at fair value using income approach valuation methodologies at the date of acquisition and are subsequently re-measured if there are indicators of impairment. During the three months ended December 29, 2023, the Company abandoned a previously capitalized in-process research and development (“IPR&D”) project and recorded an impairment charge of $16.1 million. There were no indicators of impairment identified during the three months ended December 30, 2022. Fair Value of Debt The Company’s debt is carried at amortized cost and is measured at fair value quarterly for disclosure purposes. The estimated fair values are based on Level 2 inputs as the fair value is based on quoted prices for the Company’s debt and comparable instruments in inactive markets. The carrying amount and estimated fair value of debt consists of the following (in millions): As of December 29, 2023 September 29, 2023 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value 1.80% Senior Notes due 2026 497.9 462.3 497.7 444.5 3.00% Senior Notes due 2031 495.3 430.7 495.2 390.4 Total debt under Senior Notes $ 993.2 $ 893.0 $ 992.9 $ 834.9

Inventory

Inventory	3 Months Ended
	Dec. 29, 2023
Inventory, Net [Abstract]
INVENTORY	INVENTORY Inventory consists of the following (in millions): As of December 29, 2023 September 29, 2023 Raw materials $ 44.7 $ 57.2 Work-in-process 691.0 746.8 Finished goods 191.1 315.7 Total inventory $ 926.8 $ 1,119.7

Property, Plant And Equipment

Property, Plant And Equipment	3 Months Ended
	Dec. 29, 2023
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT AND EQUIPMENT	PROPERTY, PLANT, AND EQUIPMENT, NET Property, plant, and equipment, net consists of the following (in millions): As of December 29, 2023 September 29, 2023 Land and improvements $ 11.8 $ 11.8 Buildings and improvements 592.1 588.2 Furniture and fixtures 76.1 74.8 Machinery and equipment 3,413.3 3,389.3 Construction in progress 78.5 107.6 Total property, plant, and equipment, gross 4,171.8 4,171.7 Accumulated depreciation (2,829.1) (2,781.6) Total property, plant, and equipment, net $ 1,342.7 $ 1,390.1

Goodwill And Intangible Assets

Goodwill And Intangible Assets	3 Months Ended
	Dec. 29, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	7. GOODWILL AND INTANGIBLE ASSETS There were no changes to the carrying amount of goodwill during the three months ended December 29, 2023. The Company tests its goodwill for impairment annually as of the first day of its fourth fiscal quarter and in interim periods if certain events occur indicating the carrying value of goodwill may be impaired. There were no indicators of impairment noted during the three months ended December 29, 2023. Intangible assets consist of the following (in millions): As of Weighted December 29, 2023 September 29, 2023 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology and other 6.1 $ 1,290.4 $ (421.3) $ 869.1 $ 1,290.4 $ (379.4) $ 911.0 Technology licenses 3.0 80.4 (42.2) 38.2 75.8 (36.0) 39.8 In-process research and development 255.1 — 255.1 271.3 — 271.3 Total intangible assets $ 1,625.9 $ (463.5) $ 1,162.4 $ 1,792.1 $ (570.0) $ 1,222.1 Fully amortized intangible assets are eliminated from both the gross and accumulated amortization amounts in the first quarter of each fiscal year. Amortization expense related to definite-lived intangible assets was $48.1 million and $72.0 million for the three months ended December 29, 2023 and December 30, 2022, respectively. Annual amortization expense for the next five fiscal years related to definite-lived intangible assets, excluding IPR&D, is expected to be as follows (in millions): Remaining 2024 2025 2026 2027 2028 Thereafter Amortization expense $ 131.7 $ 156.6 $ 128.7 $ 113.5 $ 90.3 $ 286.5

Income Taxes

Income Taxes	3 Months Ended
	Dec. 29, 2023
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The provision for income taxes consists of the following components (in millions): Three Months Ended December 29, 2023 December 30, 2022 United States income taxes $ 12.1 $ 26.4 Foreign income taxes 8.3 14.9 Provision for income taxes $ 20.4 $ 41.3 Effective tax rate 8.1 % 11.8 % The difference between the Company’s effective tax rate and the 21.0% United States federal statutory rate for the three months ended December 29, 2023 and December 30, 2022 resulted primarily from foreign earnings taxed at rates lower than the federal statutory rate, a benefit from foreign-derived intangible income deduction (“FDII”), and research and experimentation and foreign tax credits earned, partially offset by a tax on global intangible low-taxed income (“GILTI”), and tax expense related to share-based compensation shortfalls.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Dec. 29, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Legal Matters From time to time, various lawsuits, claims, and proceedings have been, and may in the future be, instituted or asserted against the Company, including those pertaining to patent infringement, intellectual property, environmental hazards, product liability and warranty, safety and health, employment, and contractual matters. The semiconductor industry is characterized by vigorous protection and pursuit of intellectual property rights. From time to time, third parties have asserted and may in the future assert patent, copyright, trademark, and other intellectual property rights to technologies that are important to the Company’s business and have demanded and may in the future demand that the Company license their technology. The outcome of any such litigation cannot be predicted with certainty and some such lawsuits, claims, or proceedings may be disposed of unfavorably to the Company. Generally speaking, intellectual property disputes often have a risk of injunctive relief, which, if imposed against the Company, could materially and adversely affect the Company’s financial condition or results of operations. From time to time the Company may also be involved in legal proceedings in the ordinary course of business. The Company monitors the status of legal proceedings and other contingencies on an ongoing basis to ensure loss contingencies are recognized and disclosed in its financial statements and footnotes. The Company does not believe there are any pending legal proceedings that are reasonably possible to result in a material loss. The Company is engaged in various legal actions in the normal course of business and, while there can be no assurances, the Company believes the outcome of all pending litigation involving the Company will not have, individually or in the aggregate, a material adverse effect on its business or financial statements. Guarantees and Indemnities The Company has made no significant contractual guarantees for the benefit of third parties. However, the Company generally indemnifies its customers from third-party intellectual property infringement litigation claims related to its products and, on occasion, also provides other indemnities related to product sales. In connection with certain facility leases, the Company has indemnified its lessors for certain claims arising from the facility or the lease. The Company indemnifies its directors and officers to the maximum extent permitted under the laws of the state of Delaware. The duration of the indemnities varies and in many cases is indefinite. The indemnities to customers in connection with product sales generally are subject to limits based upon the amount of the related product sales and in many cases are subject to geographic and other restrictions. In certain instances, the Company’s indemnities do not provide for any limitation of the maximum potential future payments the Company could be obligated to make. The Company has not recorded any liability for these indemnities in the accompanying consolidated balance sheets and does not expect that such obligations will have a material adverse impact on its financial statements. Purchase Commitments The Company purchases materials primarily pursuant to individual purchase orders, some of which have underlying master purchase agreements. Some of these purchase commitments are cancellable, and some are non-cancelable, depending on the terms with each individual supplier. In the event of cancellation, the Company may be required to pay costs incurred through the date of cancellation or other fees. When cancellation would result in incurring costs or other fees, the Company has historically sought to negotiate amended terms to the original agreements and orders to limit its exposure. As such, the Company believes that purchase commitments as of any particular date may not be a reliable indicator of future commitments. The Company maintains certain minimum purchase commitments under long-term capacity reservation agreements primarily with foundries for the purchase of wafers. Under these agreements, the Company has agreed to pay refundable deposits to the suppliers in exchange for reserved manufacturing production capacity over the term of the agreements. As of December 29, 2023, the remaining deposits under the long-term capacity reservation agreements were $43.0 million and $16.0 million recorded within other current assets and other long-term assets, respectively.

Stockholder's Equity

Stockholder's Equity	3 Months Ended
	Dec. 29, 2023
Stockholders' Equity Note [Abstract]
Equity [Text Block]	10. STOCKHOLDERS’ EQUITY Stock Repurchase On January 31, 2023, the Board of Directors approved a stock repurchase program (“January 31, 2023 stock repurchase program”), pursuant to which the Company is authorized to repurchase up to $2.0 billion of its common stock from time to time through February 1, 2025, on the open market or in privately negotiated transactions, in compliance with applicable securities laws and other legal requirements. The January 31, 2023 stock repurchase program succeeds in its entirety the stock repurchase program approved by the Board of Directors on January 26, 2021 (“January 26, 2021 stock repurchase program”). The timing and amount of any shares of the Company’s common stock that are repurchased under the January 31, 2023 stock repurchase program will be determined by the Company’s management based on its evaluation of market conditions and other factors. The January 31, 2023 stock repurchase program may be suspended or discontinued at any time. The Company currently expects to fund the January 31, 2023 stock repurchase program using the Company’s working capital. During the three months ended December 29, 2023, the Company did not repurchase any shares of its common stock pursuant to the January 31, 2023 stock repurchase program. As of December 29, 2023, $2.0 billion remained available under the January 31, 2023 stock repurchase program. During the three months ended December 30, 2022, the Company paid $166.2 million (including commissions) in connection with the repurchase of 1.8 million shares of its common stock (paying an average price of $90.57 per share), all of which shares were repurchased pursuant to the January 26, 2021 stock repurchase program. Dividends On January 30, 2024, the Company announced that the Board of Directors had declared a cash dividend on the Company’s common stock of $0.68 per share. This dividend is payable on March 12, 2024, to the Company’s stockholders of record as of the close of business on February 20, 2024. Dividends charged to retained earnings were as follows (in millions, except per share data): Fiscal Years Ended September 27, 2024 September 29, 2023 Per Share Total Amount Per Share Total Amount First quarter $ 0.68 $ 108.9 $ 0.62 $ 99.4 Share-based Compensation The following table summarizes the share-based compensation expense by line item in the Consolidated Statements of Operations (in millions): Three Months Ended December 29, 2023 December 30, 2022 Cost of goods sold $ 8.8 $ 2.6 Research and development 25.4 27.9 Selling, general, and administrative 19.1 18.9 Total share-based compensation $ 53.3 $ 49.4

Earnings Per Share

Earnings Per Share	3 Months Ended
	Dec. 29, 2023
Earnings Per Share [Abstract]
EARNINGS PER SHARE	11. EARNINGS PER SHARE The following table sets forth the computation of basic and diluted earnings per share (in millions, except per share amounts): Three Months Ended December 29, 2023 December 30, 2022 Net income $ 231.3 $ 309.4 Weighted average shares outstanding – basic 159.9 159.8 Dilutive effect of equity-based awards 1.1 0.4 Weighted average shares outstanding – diluted 161.0 160.2 Net income per share – basic $ 1.45 $ 1.94 Net income per share – diluted $ 1.44 $ 1.93 Anti-dilutive common stock equivalents — 1.0 Basic earnings per share are calculated by dividing net income by the weighted average number of shares of the Company’s common stock outstanding during the period. The calculation of diluted earnings per share includes the dilutive effect of equity-based awards that were outstanding during the three months ended December 29, 2023, and December 30, 2022, using the treasury stock method. Shares issuable upon the vesting of performance stock awards are likewise included in the calculation of diluted earnings per share as of the date the condition(s) have been satisfied, assuming the end of the reporting period was the end of the contingency period. Certain of the Company’s outstanding share-based awards, noted in the table above, were excluded because they were anti-dilutive, but they could become dilutive in the future.

Revenue Recognition (Notes)

Revenue Recognition (Notes)	3 Months Ended
	Dec. 29, 2023
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	2. REVENUE RECOGNITION The Company presents net revenue by geographic area, based upon the location of the original equipment manufacturers’ (“OEMs”) headquarters, and by sales channel, as it believes that doing so best depicts how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. Individually insignificant OEMs are presented based upon the location of the Company’s direct customer, which is typically a distributor. Net revenue by geographic area is as follows (in millions): Three Months Ended December 29, 2023 December 30, 2022 United States $ 969.2 $ 1,028.3 China 79.9 106.3 Taiwan 71.3 85.6 South Korea 45.6 35.8 Europe, Middle East, and Africa 27.1 54.1 Other Asia-Pacific 8.4 19.2 Total net revenue $ 1,201.5 $ 1,329.3 Net revenue by sales channel is as follows (in millions): Three Months Ended December 29, 2023 December 30, 2022 Distributors $ 1,062.9 $ 1,179.1 Direct customers 138.6 150.2 Total net revenue $ 1,201.5 $ 1,329.3

Other Liabilities

Other Liabilities	3 Months Ended
	Dec. 29, 2023
Condensed Financial Information Disclosure [Abstract]
Additional Financial Information Disclosure	12. SUPPLEMENTAL FINANCIAL INFORMATION Other current assets consist of the following (in millions): As of December 29, 2023 September 29, 2023 Prepaid expenses $ 288.4 $ 306.0 Other 166.4 155.1 Total other current assets $ 454.8 $ 461.1 Other current liabilities consist of the following (in millions): As of December 29, 2023 September 29, 2023 Accrued customer liabilities $ 240.6 $ 270.9 Accrued taxes 68.2 58.8 Short-term operating lease liabilities 27.0 28.3 Other 48.4 44.8 Total other current liabilities $ 384.2 $ 402.8

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Pay vs Performance Disclosure
Net income	$ 231.3	$ 309.4

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 29, 2023 shares
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	ITEM 5. OTHER INFORMATION Director and Officer Trading Arrangements: A significant portion of the compensation of our directors and officers (as defined in Rule 16a-1(f) under the Exchange Act) is in the form of equity awards and, from time to time, directors and officers engage in open-market transactions with respect to the securities acquired pursuant to such equity awards or our other securities, including to satisfy tax withholding obligations when equity awards vest or are exercised, and for diversification or other personal reasons. Transactions in our securities by directors and officers are required to be made in accordance with our insider trading policy, which requires that the transactions be in accordance with applicable U.S. federal securities laws that prohibit trading while in possession of material nonpublic information. Rule 10b5-1 under the Exchange Act provides an affirmative defense that enables directors and officers to prearrange transactions in our securities in a manner that avoids concerns about initiating transactions while in possession of material nonpublic information. The following table describes contracts, instructions or written plans for the sale or purchase of our securities adopted by our directors and officers during the quarter covered by this report that are intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) (a “Rule 10b5-1 trading arrangement”): Name and Title Date of Adoption Duration of Rule 10b5-1 Trading Arrangement Aggregate Number of Securities to Be Purchased or Sold Philip Carter, Vice President and Corporate Controller December 14, 2023 Until December 1, 2024, or such earlier date upon which all transactions are completed or expire without execution Sale of up to 1,478 shares None of our directors or officers terminated a Rule 10b5-1 trading arrangement or adopted or terminated a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K) during the quarterly period covered by this report.
Rule 10b5-1 Arrangement Adopted	true
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Liam Griffin [Member]
Trading Arrangements, by Individual
Name	Philip Carter
Title	Vice President and Corporate Controller
Adoption Date	December 14, 2023
Termination Date	December 1, 2024
Aggregate Available	1,478

Description Of Business and B_2

Description Of Business and Basis Of Presentation (Policies)	3 Months Ended
	Dec. 29, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Fiscal Period	The Company’s fiscal year ends on the Friday closest to September 30. The fiscal year ending on September 27, 2024 consists of 52 weeks (“fiscal 2024”). The fiscal year ended on September 29, 2023 consisted of 52 weeks (“fiscal 2023”). The three months ended December 29, 2023, and December 30, 2022, each consisted of 13 weeks.
Property, Plant and Equipment, Policy	Property, Plant, and Equipment Property, plant, and equipment are carried at cost less accumulated depreciation, with significant renewals and betterments being capitalized and retired equipment written off in the respective periods. Maintenance and repairs are expensed as incurred. Depreciation is calculated using the straight-line method over the estimated useful lives, which range from five to forty years for buildings and improvements and from five to ten years for machinery and equipment. Leasehold improvements are depreciated over the lesser of the economic life or the life of the associated lease.
New Accounting Pronouncements, Policy	Recently Issued Accounting Pronouncements In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosure” (“ASU 2023-07”). ASU 2023-07 requires disclosure of incremental segment information on an annual and interim basis. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, on a retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2023-07 on its consolidated financial statements and related disclosures.
Use of Estimates, Policy	During the three months ended December 29, 2023, the Company changed its accounting estimate for the expected useful lives of certain machinery and equipment. The Company evaluated its current asset base and reassessed the estimated useful lives of certain machinery and equipment in connection with its recent usage of older equipment, including considering the technological and physical obsolescence of such machinery and equipment. Based on its ability to re-use equipment across generations of process technologies and historical usage trends, the Company determined that the expected useful lives for certain machinery and equipment should be increased by up to two years to reflect more closely the estimated economic lives of those assets. This change in estimate was applied prospectively effective for the first quarter of fiscal 2024 and resulted in a decrease in depreciation expense of $22.9 million for the three months ended December 29, 2023. This benefit increased income from operations by $2.6 million and decreased ending inventory by $20.3 million as of December 29, 2023. As a result of this change in accounting estimate, net income increased by $2.6 million and diluted earnings per share increased by $0.02 for the three months ended December 29, 2023.

Marketable Securities (Tables)

Marketable Securities (Tables)	3 Months Ended
	Dec. 29, 2023
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	The Company’s portfolio of available-for-sale marketable securities consists of the following (in millions): Current Noncurrent December 29, 2023 September 29, 2023 December 29, 2023 September 29, 2023 U.S. Treasury and government securities $ 15.7 $ 15.1 $ 2.0 $ 4.1 Corporate bonds and notes 0.2 — — — Municipal bonds — 0.5 — — Total marketable securities $ 15.9 $ 15.6 $ 2.0 $ 4.1

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Dec. 29, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis	Assets and liabilities recorded at fair value on a recurring basis consisted of the following (in millions): As of December 29, 2023 September 29, 2023 Fair Value Measurements Fair Value Measurements Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Assets Cash and cash equivalents (1) $ 1,029.7 $ 1,029.6 $ 0.1 $ — $ 718.8 $ 718.5 $ 0.3 $ — U.S. Treasury and government securities 17.7 0.4 17.3 — 19.2 — 19.2 — Corporate bonds and notes 0.2 — 0.2 — — — — — Municipal bonds — — — — 0.5 — 0.5 — Total assets at fair value $ 1,047.6 $ 1,030.0 $ 17.6 $ — $ 738.5 $ 718.5 $ 20.0 $ —
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The carrying amount and estimated fair value of debt consists of the following (in millions): As of December 29, 2023 September 29, 2023 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value 1.80% Senior Notes due 2026 497.9 462.3 497.7 444.5 3.00% Senior Notes due 2031 495.3 430.7 495.2 390.4 Total debt under Senior Notes $ 993.2 $ 893.0 $ 992.9 $ 834.9

Inventory (Tables)

Inventory (Tables)	3 Months Ended
	Dec. 29, 2023
Inventory, Net [Abstract]
Schedule Of Inventories	Inventory consists of the following (in millions): As of December 29, 2023 September 29, 2023 Raw materials $ 44.7 $ 57.2 Work-in-process 691.0 746.8 Finished goods 191.1 315.7 Total inventory $ 926.8 $ 1,119.7

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended
	Dec. 29, 2023
Property, Plant and Equipment [Abstract]
Schedule Of Property, Plant And Equipment	Property, plant, and equipment, net consists of the following (in millions): As of December 29, 2023 September 29, 2023 Land and improvements $ 11.8 $ 11.8 Buildings and improvements 592.1 588.2 Furniture and fixtures 76.1 74.8 Machinery and equipment 3,413.3 3,389.3 Construction in progress 78.5 107.6 Total property, plant, and equipment, gross 4,171.8 4,171.7 Accumulated depreciation (2,829.1) (2,781.6) Total property, plant, and equipment, net $ 1,342.7 $ 1,390.1

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Dec. 29, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets Excluding Goodwill	Intangible assets consist of the following (in millions): As of Weighted December 29, 2023 September 29, 2023 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology and other 6.1 $ 1,290.4 $ (421.3) $ 869.1 $ 1,290.4 $ (379.4) $ 911.0 Technology licenses 3.0 80.4 (42.2) 38.2 75.8 (36.0) 39.8 In-process research and development 255.1 — 255.1 271.3 — 271.3 Total intangible assets $ 1,625.9 $ (463.5) $ 1,162.4 $ 1,792.1 $ (570.0) $ 1,222.1
Schedule Of Expected Annual Amortization Expense Related To Intangible Assets For The Next Five Years	Annual amortization expense for the next five fiscal years related to definite-lived intangible assets, excluding IPR&D, is expected to be as follows (in millions): Remaining 2024 2025 2026 2027 2028 Thereafter Amortization expense $ 131.7 $ 156.6 $ 128.7 $ 113.5 $ 90.3 $ 286.5

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Dec. 29, 2023
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The provision for income taxes consists of the following components (in millions): Three Months Ended December 29, 2023 December 30, 2022 United States income taxes $ 12.1 $ 26.4 Foreign income taxes 8.3 14.9 Provision for income taxes $ 20.4 $ 41.3 Effective tax rate 8.1 % 11.8 %

Stockholder's Equity (Tables)

Stockholder's Equity (Tables)	3 Months Ended
	Dec. 29, 2023
Stockholders' Equity Note [Abstract]
Dividends Declared	Dividends charged to retained earnings were as follows (in millions, except per share data): Fiscal Years Ended September 27, 2024 September 29, 2023 Per Share Total Amount Per Share Total Amount First quarter $ 0.68 $ 108.9 $ 0.62 $ 99.4
Schedule of share-based compensation expense	The following table summarizes the share-based compensation expense by line item in the Consolidated Statements of Operations (in millions): Three Months Ended December 29, 2023 December 30, 2022 Cost of goods sold $ 8.8 $ 2.6 Research and development 25.4 27.9 Selling, general, and administrative 19.1 18.9 Total share-based compensation $ 53.3 $ 49.4

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Dec. 29, 2023
Earnings Per Share [Abstract]
Schedule Of Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share (in millions, except per share amounts): Three Months Ended December 29, 2023 December 30, 2022 Net income $ 231.3 $ 309.4 Weighted average shares outstanding – basic 159.9 159.8 Dilutive effect of equity-based awards 1.1 0.4 Weighted average shares outstanding – diluted 161.0 160.2 Net income per share – basic $ 1.45 $ 1.94 Net income per share – diluted $ 1.44 $ 1.93 Anti-dilutive common stock equivalents — 1.0

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Dec. 29, 2023
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	Three Months Ended December 29, 2023 December 30, 2022 United States $ 969.2 $ 1,028.3 China 79.9 106.3 Taiwan 71.3 85.6 South Korea 45.6 35.8 Europe, Middle East, and Africa 27.1 54.1 Other Asia-Pacific 8.4 19.2 Total net revenue $ 1,201.5 $ 1,329.3 Net revenue by sales channel is as follows (in millions): Three Months Ended December 29, 2023 December 30, 2022 Distributors $ 1,062.9 $ 1,179.1 Direct customers 138.6 150.2 Total net revenue $ 1,201.5 $ 1,329.3

Other Liabilities (Tables)

Other Liabilities (Tables)	3 Months Ended
	Dec. 29, 2023
Condensed Financial Information Disclosure [Abstract]
Other Current Liabilities	Other current liabilities consist of the following (in millions): As of December 29, 2023 September 29, 2023 Accrued customer liabilities $ 240.6 $ 270.9 Accrued taxes 68.2 58.8 Short-term operating lease liabilities 27.0 28.3 Other 48.4 44.8 Total other current liabilities $ 384.2 $ 402.8
Schedule of Other Current Assets	Other current assets consist of the following (in millions): As of December 29, 2023 September 29, 2023 Prepaid expenses $ 288.4 $ 306.0 Other 166.4 155.1 Total other current assets $ 454.8 $ 461.1

Description Of Business and B_3

Description Of Business and Basis Of Presentation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Change in Accounting Estimate [Line Items]
Depreciation	$ 64.7	$ 99.4
Operating Income (Loss)	258.3	367
Net income	$ 231.3	$ 309.4
Diluted (in dollars per share)	$ 1.44	$ 1.93
Service Life
Change in Accounting Estimate [Line Items]
Depreciation	$ 22.9
Operating Income (Loss)	2.6
Inventory Adjustments	20.3
Net income	$ 2.6
Diluted (in dollars per share)	$ 0.02

Description Of Business and B_4

Description Of Business and Basis Of Presentation (New Accounting Pronouncements) (Details)	3 Months Ended
	Dec. 29, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Document Period End Date	Dec. 29, 2023

Marketable Securities (Details)

Marketable Securities (Details) - USD ($) $ in Millions	Dec. 29, 2023	Sep. 29, 2023
Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Current	$ 15.9	$ 15.6
Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Noncurrent	2	4.1
US Treasury and Government [Member] | Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Current	15.7	15.1
US Treasury and Government [Member] | Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Noncurrent	2	4.1
Corporate Debt Securities [Member] | Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Current	0.2	0
Corporate Debt Securities [Member] | Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Noncurrent	0	0
US States and Political Subdivisions Debt Securities [Member] | Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Current	0	0.5
US States and Political Subdivisions Debt Securities [Member] | Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Noncurrent	$ 0	$ 0

Fair Value (Schedule Of Financi

Fair Value (Schedule Of Financial Instruments Measured At Fair Value On Recurring Basis) (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions	Dec. 29, 2023	Sep. 29, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (1)	$ 1,029.7	$ 718.8
Assets, Fair Value Disclosure	1,047.6	738.5
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (1)	1,029.6	718.5
Assets, Fair Value Disclosure	1,030	718.5
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (1)	0.1	0.3
Assets, Fair Value Disclosure	17.6	20
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (1)	0	0
Assets, Fair Value Disclosure	0	0
US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	17.7	19.2
US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0.4	0
US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	17.3	19.2
US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0.2	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0.2	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0.5
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	0	0.5
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 0	$ 0

Fair Value , Assets and Liabili

Fair Value , Assets and Liabilities Measured on Nonrecurring Basis (Details) - USD ($) $ in Millions	Dec. 29, 2023	Sep. 29, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	$ 993.2	$ 992.9
2026 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes, Noncurrent	497.9	497.7
2031 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes, Noncurrent	495.3	495.2
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	893	834.9
Fair Value, Inputs, Level 2 [Member] | 2026 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value	462.3	444.5
Fair Value, Inputs, Level 2 [Member] | 2031 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value	$ 430.7	$ 390.4

Inventory (Schedule Of Inventor

Inventory (Schedule Of Inventories) (Details) - USD ($) $ in Millions	Dec. 29, 2023	Sep. 29, 2023
Inventory, Net [Abstract]
Raw materials	$ 44.7	$ 57.2
Work-in-process	691	746.8
Finished goods	191.1	315.7
Total inventory	$ 926.8	$ 1,119.7

Property, Plant and Equipment_2

Property, Plant and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 29, 2023	Sep. 29, 2023
Property, Plant and Equipment
Total property, plant, and equipment, gross	$ 4,171.8	$ 4,171.7
Accumulated depreciation	(2,829.1)	(2,781.6)
Total property, plant, and equipment, net	1,342.7	1,390.1
Land and improvements [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	11.8	11.8
Building and improvements [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	592.1	588.2
Furniture and fixtures [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	3,413.3	74.8
Machinery and equipment [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	76.1	3,389.3
Construction in progress [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	$ 78.5	$ 107.6

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Millions	Dec. 29, 2023	Sep. 29, 2023
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (463.5)	$ (570)
Total intangible assets, Gross Carrying Amount	1,625.9	1,792.1
Total intangible assets, Net Carrying Amount	$ 1,162.4	1,222.1
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	3 years
Finite-Lived Intangible Assets, Gross	$ 80.4	75.8
Accumulated Amortization	(42.2)	(36)
Net Carrying Amount	38.2	39.8
In Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	0	0
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 255.1	271.3
Developed Technology Rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	6 years 1 month 6 days
Finite-Lived Intangible Assets, Gross	$ 1,290.4	1,290.4
Accumulated Amortization	(421.3)	(379.4)
Net Carrying Amount	$ 869.1	$ 911

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Schedule Of Expected Annual Amortization Expense Related To Intangible Assets For The Next Five Years) (Details) $ in Millions	Dec. 29, 2023 USD ($)
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Remaining 2019	$ 131.7
2020	128.7
2021	113.5
2022	90.3
Thereafter	286.5
Finite-Lived Intangible Asset, Expected Amortization, Year One	$ 156.6

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Period Increase (Decrease)	$ 0
Amortization of intangibles	$ 48,100	$ 72,000

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Income Tax Disclosure [Abstract]
Document Period End Date	Dec. 29, 2023
United States income taxes	$ 12.1	$ 26.4
Foreign income taxes	8.3	14.9
Provision for income taxes	$ 20.4	$ 41.3
Effective tax rate	8.10%	11.80%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2023	Sep. 29, 2023
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	21%
Accrued income taxes, current	$ 68.2	$ 58.8

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Thousands	Dec. 29, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Deposits Assets, Noncurrent	$ 16,000
Deposits Assets, Current	$ 43,000

Stockholder's Equity (Share Rep

Stockholder's Equity (Share Repurchase) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 30, 2022	Dec. 29, 2023
Equity, Class of Treasury Stock [Line Items]
Stock repurchased	$ 166,200
Treasury Stock, Shares, Acquired	1,800
Average price of stock repurchased (in dollars per share)	$ (90.57)
Remaining amount authorized fro stock repurchase		$ 2,000,000

Stockholder's Equity (Dividend)

Stockholder's Equity (Dividend) (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended
	Mar. 12, 2024	Feb. 20, 2024	Jan. 30, 2024	Dec. 29, 2023	Dec. 30, 2022
Dividends Payable [Line Items]
Document Period End Date				Dec. 29, 2023
Payments of Ordinary Dividends				$ 108.9	$ 99.4
Payments of ordinary dividends				$ 108.9	$ 99.4
Common Stock, Dividends, Per Share, Declared				$ 0.68	$ 0.62
Subsequent Event [Member] | Dividend Declared [Member]
Dividends Payable [Line Items]
Dividend declaration date			Jan. 30, 2024
dividends date to be paid	Mar. 12, 2024
Dividends date of record		Feb. 20, 2024
Cash dividends declared and paid per share (usd per share)			$ 0.68

Stockholder's Equity (Share Bas

Stockholder's Equity (Share Based Compensation) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Document Period End Date	Dec. 29, 2023
Share-based compensation expense	$ 53.3	$ 49.4
Cost of sales [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	8.8	2.6
Research and development [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	25.4	27.9
Selling, general and administrative [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 19.1	$ 18.9

Earnings Per Share (Schedule Of

Earnings Per Share (Schedule Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 231.3	$ 309.4
Weighted average shares outstanding - basic (shares)	159.9	159.8
Dilutive effect of equity based awards (shares)	1.1	0.4
Weighted average shares outstanding - diluted (shares)	161	160.2
Net income per share - basic (usd per share)	$ 1.45	$ 1.94
Net income per share - diluted (usd per share)	$ 1.44	$ 1.93
Anti-dilutive common stock equivalents (shares)	0	1

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Disaggregation of Revenue [Line Items]
Document Period End Date	Dec. 29, 2023
Revenues	$ 1,201.5	$ 1,329.3
Revenue from Contract with Customer, Excluding Assessed Tax	1,201.5	1,329.3
Sales Channel, Through Intermediary
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,062.9	1,179.1
Sales Channel, Directly to Consumer
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	138.6	150.2
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues	969.2	1,028.3
CHINA
Disaggregation of Revenue [Line Items]
Revenues	79.9	106.3
KOREA, REPUBLIC OF
Disaggregation of Revenue [Line Items]
Revenues	45.6	35.8
TAIWAN, PROVINCE OF CHINA
Disaggregation of Revenue [Line Items]
Revenues	71.3	85.6
EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenues	27.1	54.1
Asia, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 8.4	$ 19.2

Other Liabilities (Details)

Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 29, 2023	Sep. 29, 2023
Condensed Financial Information Disclosure [Abstract]
Accrued income taxes, current	$ 68,200	$ 58,800
Operating Lease, Liability, Current	27,000	28,300
Contract with Customer, Refund Liability	240,600	270,900
Other miscellaneous current liabilities [Line Items]	48,400	44,800
Other Accrued Liabilities, Current	384,200	402,800
Other Assets, Current	454,800	461,100
Prepaid Expense, Current	288,400	306,000
Other miscellaneous current assets	$ 166,400	$ 155,100

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Subsequent Event [Line Items]
Repayments of Long-term Debt	$ 300	$ 0

Uncategorized Items - swks-2023

Label	Element	Value
2023 Stock Repurchase Plan [Member]
Stock Repurchase Program, Authorized Amount	us-gaap_StockRepurchaseProgramAuthorizedAmount1	$ 2,000,000,000
2023 Stock Repurchase Plan [Member] | Subsequent Event [Member]
Stock Repurchase Program Expiration Date	us-gaap_StockRepurchaseProgramExpirationDate	Feb. 01, 2025