Skyworks Solutions (SWKS) 10-Q 7 Aug 19 2019 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - $ / shares	9 Months Ended
	Jun. 28, 2019	Aug. 01, 2019
Cover page.
Document Type	10-Q
Document Period End Date	Jun. 28, 2019
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	20 Sylvan Road,
Entity Address, City or Town	Woburn
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01801
City Area Code	(781)
Local Phone Number	376-3000
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		171,703,134
Entity Listing, Par Value Per Share	$ 0.25
Entity Central Index Key	0000004127
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--09-27

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Income Statement [Abstract]
Net revenue	$ 767	$ 894.3	$ 2,549.4	$ 2,859.6
Cost of goods sold	454.5	442.7	1,351.6	1,412.5
Gross profit	312.5	451.6	1,197.8	1,447.1
Operating expenses:
Research and development	100.6	96.8	317.3	301.5
Selling, general and administrative	46.8	44.6	142.5	153.4
Amortization of intangibles	5.5	3.9	18.6	12
Restructuring and other charges	0	0	1.3	1
Total operating expenses	152.9	145.3	479.7	467.9
Operating income	159.6	306.3	718.1	979.2
Other income, net	2.3	4.5	8.9	9.5
Income before income taxes	161.9	310.8	727	988.7
Provision for income taxes	17.8	24.3	84	355.8
Net income	$ 144.1	$ 286.5	$ 643	$ 632.9
Earnings per share:
Basic (in dollars per share)	$ 0.83	$ 1.58	$ 3.69	$ 3.47
Diluted (in dollars per share)	$ 0.83	$ 1.57	$ 3.67	$ 3.44
Weighted average shares:
Basic (in shares)	172.6	181.2	174.3	182.3
Diluted (in shares)	173.4	182.8	175.2	184.2
Cash dividends declared and paid per share (usd per share)	$ 0.38	$ 0.32	$ 1.14	$ 0.96

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 144.1	$ 286.5	$ 643	$ 632.9
Other comprehensive income
Fair value of investments	0.3	(0.1)	0.5	(0.1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0	0	0.5	0
Foreign currency translation adjustment	0	0.1	0	(0.2)
Comprehensive income	$ 144.4	$ 286.5	$ 644	$ 632.6

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 28, 2019	Sep. 28, 2018
Current assets:
Cash and cash equivalents	$ 742.8	$ 733.3
Marketable Securities, Current	192.2	294.1
Receivables, net of allowance for doubtful accounts of $0.7 and $0.6, respectively	557.8	655.8
Inventory	580.8	490.2
Other current assets	132.7	88.8
Total current assets	2,206.3	2,262.2
Property, plant and equipment, net	1,230.1	1,140.9
Goodwill	1,189.8	1,189.8
Intangible assets, net	114.1	143.7
Deferred tax assets, net	33.7	36.5
Marketable Securities, Noncurrent	35.1	22.8
Other long-term assets	33.2	33
Total assets	4,842.3	4,828.9
Current liabilities:
Accounts payable	218.9	229.9
Accrued compensation and benefits	85.2	85.2
Other current liabilities	92.4	74.6
Total current liabilities	396.5	389.7
Long-term tax liabilities	315.5	310.5
Other long-term liabilities	30.4	31.7
Total liabilities	742.4	731.9
Commitments and contingencies (Note 9)
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; 229.6 shares issued and 172.7 shares outstanding at March 29, 2019, and 228.4 shares issued and 177.4 shares outstanding at September 28, 2018	42.9	44.4
Additional paid-in capital	3,153.3	3,061
Treasury stock, at cost	(3,265.6)	(2,732.5)
Retained earnings	4,177.1	3,732.9
Accumulated other comprehensive loss	(7.8)	(8.8)
Total stockholders’ equity	4,099.9	4,097
Total liabilities and stockholders’ equity	$ 4,842.3	$ 4,828.9

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Jun. 28, 2019	Sep. 28, 2018
Current assets:
Allowance for doubtful accounts	$ 0.7	$ 0.6
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	25	25
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.25	$ 0.25
Common stock, shares authorized	525	525
Common stock, shares issued	229.8	228.4
Common stock, shares outstanding	171.6	177.4

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018
Statement of Cash Flows [Abstract]
Net income	$ 643	$ 632.9
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	58.6	86.3
Depreciation	235.4	198.9
Amortization of intangible assets, including inventory step-up	43.3	16.5
Deferred income taxes	(12.1)	35.6
Changes in fair value of contingent consideration	(3.1)	(7.8)
Other, net	0.1	0.3
Changes in assets and liabilities:
Receivables, net	98	(13.7)
Inventory	(89.7)	(10.2)
Other current and long-term assets	(44.1)	(45.8)
Accounts payable	(24.5)	(56.3)
Other current and long-term liabilities	45.5	216.3
Net cash provided by operating activities	950.4	1,053
Cash flows from investing activities:
Capital expenditures	(314)	(310)
Payments for Software	(11.8)	(8.6)
Payments to Acquire Marketable Securities	(243.7)	(523.2)
Maturity of investments	334.4	32.6
Net cash used in investing activities	(235.1)	(809.2)
Cash flows from financing activities:
Repurchase of common stock - payroll tax withholdings on equity awards	(21.6)	(47.5)
Repurchase of common stock - stock repurchase program	(511.3)	(524.5)
Dividends paid	(198.8)	(175.2)
Net proceeds from exercise of stock options	14.6	34.8
Proceeds from Issuance of Common Stock	11.3	9.9
Net cash used in financing activities	(705.8)	(702.5)
Net increase in cash and cash equivalents	9.5	(458.7)
Cash and cash equivalents at beginning of period	733.3	1,616.8
Cash and cash equivalents at end of period	742.8	1,158.1
Supplemental cash flow disclosures:
Income taxes paid	$ 116.5	$ 117.1

Statement of Stockholders Equit

Statement of Stockholders Equity Statement - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Deferred Tax Asset [Domain]
Common stock, shares outstanding		183.1
Stockholders' Equity Attributable to Parent	$ 4,065.7	$ 45.8	$ (1,925)	$ 2,893.8	$ 3,059.6	$ (8.5)
Treasury Stock, Shares			42.9
Net income	70.4				70.4
StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxes(inshares)		0.9	0.4
StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes	(29.8)	$ 0.2	$ (44.7)	14.7
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	25.5			27.4
Treasury Stock, Shares, Acquired		(1.6)
Treasury Stock, Value, Acquired, Par Value Method	(172.5)	$ (0.4)	$ (172.5)	0.4
Stock Repurchased During Period, Shares			1.6
Dividends	(58.8)				(58.8)
Other Comprehensive Income (Loss), Net of Tax	0					0
Net income	632.9
Common stock, shares outstanding		182.4
Stockholders' Equity Attributable to Parent	3,900.5	$ 45.6	$ (2,142.2)	2,936.3	3,069.3	(8.5)
Treasury Stock, Shares			44.9
Cumulative Effect of New Accounting Principle in Period of Adoption	18.5
Net income	276				276
StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxes(inshares)		0.7	0
StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes	26.2	$ 0.2	$ (1.7)	27.7
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	38.1			38.1
Treasury Stock, Shares, Acquired		(1)
Treasury Stock, Value, Acquired, Par Value Method	(111.8)	$ (0.3)	$ (111.8)	0.3
Stock Repurchased During Period, Shares			1
Dividends	(58.5)				(58.5)
Other Comprehensive Income (Loss), Net of Tax	(0.3)					(0.3)
Common stock, shares outstanding		182.1
Stockholders' Equity Attributable to Parent	4,070.2	$ 45.5	$ (2,255.7)	3,002.4	3,286.8	(8.8)
Treasury Stock, Shares			45.9
Net income	286.5				286.5
StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxes(inshares)		0.1	0
StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes	2.6	$ 0	$ (1)	3.6
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	21.7			21.7
Treasury Stock, Shares, Acquired		(2.5)
Treasury Stock, Value, Acquired, Par Value Method	(240.2)	$ (0.6)	$ (240.2)	0.6
Stock Repurchased During Period, Shares			2.5
Dividends	(57.8)				(57.8)
Other Comprehensive Income (Loss), Net of Tax	0					0
Common stock, shares outstanding		179.7
Stockholders' Equity Attributable to Parent	$ 4,082.9	$ 44.9	$ (2,496.9)	3,028.3	3,515.4	(8.8)
Treasury Stock, Shares			48.4
Common stock, shares outstanding	177.4	177.4
Stockholders' Equity Attributable to Parent	$ 4,097	$ 44.4	$ (2,732.5)	3,061	3,732.9	(8.8)
Treasury Stock, Shares			51
Cumulative Effect of New Accounting Principle in Period of Adoption							$ (1.9)
Net income	284.9				284.9
StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxes(inshares)		0.7	0.2
StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes	(14.4)	$ 0.1	$ (19.6)	5.1
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	21.3			21.3
Treasury Stock, Shares, Acquired		(4)
Treasury Stock, Value, Acquired, Par Value Method	(284)	$ (1)	$ (284)	1
Stock Repurchased During Period, Shares			4
Dividends	(67.1)				(67.1)
Other Comprehensive Income (Loss), Net of Tax	0.6					0.6
Net income	$ 643
Treasury Stock, Shares, Acquired	(6.9)
Treasury Stock, Value, Acquired, Par Value Method	$ (511.3)
Common stock, shares outstanding		174.1
Stockholders' Equity Attributable to Parent	4,038.3	$ 43.5	$ (3,036.1)	3,088.4	3,950.7	(8.2)
Treasury Stock, Shares			55.2
Net income	214				214
StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxes(inshares)		0.3	0.1
StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes	14.2	$ 0.1	$ (1.5)	15.5
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	21.8			21.8
Treasury Stock, Shares, Acquired		(1.7)
Treasury Stock, Value, Acquired, Par Value Method	(141.5)	$ (0.4)	$ (141.5)	0.5
Stock Repurchased During Period, Shares			1.7
Dividends	(66)				(66)
Other Comprehensive Income (Loss), Net of Tax	0.1					0.1
Common stock, shares outstanding		172.7
Stockholders' Equity Attributable to Parent	4,080.9	$ 43.2	$ (3,179.1)	3,126.2	4,098.7	(8.1)
Treasury Stock, Shares			57
Net income	144.1				144.1
StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxes(inshares)		0.2	0
StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes	7.1	$ 0	$ (0.7)	7.8
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	$ 19			19
Treasury Stock, Shares, Acquired	(1.2)	(1.2)
Treasury Stock, Value, Acquired, Par Value Method	$ (85.8)	$ (0.3)	$ (85.8)	0.2
Stock Repurchased During Period, Shares			1.2
Dividends	(65.7)				(65.7)
Other Comprehensive Income (Loss), Net of Tax	$ 0.3					0.3
Common stock, shares outstanding	171.6	171.6
Stockholders' Equity Attributable to Parent	$ 4,099.9	$ 42.9	$ (3,265.6)	$ 3,153.3	$ 4,177.1	$ (7.8)
Treasury Stock, Shares			58.2

Description Of Business and Bas

Description Of Business and Basis Of Presentation	9 Months Ended
	Jun. 28, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Skyworks Solutions, Inc., together with its consolidated subsidiaries (“Skyworks” or the “Company”), is empowering the wireless networking revolution. The Company’s analog semiconductors are connecting people, places, and things, spanning a number of new applications within the aerospace, automotive, broadband, cellular infrastructure, connected home, industrial, medical, military, 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 28, 2018 , filed with the SEC on November 15, 2018, as amended by Amendment No. 1 to such Annual Report on Form 10-K, filed with the SEC on January 25, 2019 (the “2018 10-K”). 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 in these unaudited consolidated financial statements and accompanying disclosures. The Company evaluates its estimates on an ongoing basis using historical experience and other factors, including the current economic environment. Significant 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, loss contingencies, and income taxes. In addition, significant 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. Fiscal 2019 consists of 52 weeks and ends on September 27, 2019 . Fiscal 2018 consisted of 52 weeks and ended on September 28, 2018 . The third quarters of fiscal 2019 and 2018 each consisted of 13 weeks and ended on June 28, 2019 , and June 29, 2018 , respectively. Recently Adopted Accounting Pronouncements In August 2015, the Financial Accounting Standards Board (“FASB”) deferred the effective date of Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606), (“ASU 2014-09”), which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The Company adopted ASU 2014-09 at the beginning of the first quarter of fiscal 2019 using the modified retrospective approach, with the cumulative effect of applying the new guidance recognized as an adjustment to the opening retained earnings balance. The Company has determined the impact of the new revenue standard on its business processes, systems, controls and consolidated financial statements is not material. Refer to Note 2 , Revenue Recognition, for additional information. In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740), Intra-entity Transfers of an Asset Other than Inventory (“ASU 2016-16”). This ASU provides guidance that changes the accounting for income tax effects of intra-entity transfers of assets other than inventory. Under the new guidance, the selling (transferring) entity is required to recognize a current tax expense or benefit upon transfer of the asset. Similarly, the purchasing (receiving) entity is required to recognize a deferred tax asset or deferred tax liability, as well as the related deferred tax benefit or expense, upon receipt of the asset. The Company adopted ASU 2016-16 during the first quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments (Topic 320), (“ASU 2016-13”). This ASU requires a financial asset (or a group of financial assets) measured on the basis of amortized cost to be presented at the net amount expected to be collected. This ASU requires that the income statement reflect the measurement of credit losses for newly recognized financial assets as well as the expected increases or decreases of expected credit losses that have taken place during the period. This ASU requires that credit losses of debt securities designated as available-for-sale be recorded through an allowance for credit losses. The ASU also limits the credit loss to the amount by which fair value is below amortized cost. The Company adopted ASU 2016-13 during the first quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (Topic 320), (“ASU 2016-01”). This ASU provides guidance for the recognition, measurement, presentation, and disclosure of financial assets and liabilities. The Company adopted ASU 2016-01 during the first quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In June 2018, the FASB issued ASU 2018-07, Compensation-Stock Compensation (Topic 718), Improvements to Nonemployee Share-based Payments (“ASU 2018-07”). This ASU expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The Company adopted ASU 2018-07 during the second quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Topic 350), Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (“ASU 2018-15”). The new guidance clarifies the accounting for implementation costs in cloud computing arrangements. The Company adopted ASU 2018-15, on a prospective basis, during the second quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”). This ASU requires lessees to reflect leases with a term greater than one year on their balance sheet as assets and obligations. The Company plans to adopt the new guidance in the first quarter of fiscal 2020. The Company will utilize the modified retrospective method and will recognize any cumulative effect adjustment in retained earnings at the beginning of the period of adoption. The Company plans to elect the package of three practical expedients that permits the Company to maintain its historical conclusions about lease identification, lease classification and initial direct costs for leases that exist at the date of adoption. Further, upon implementation of the new guidance, the Company intends to elect the practical expedient to not separate lease and non-lease components. The Company has performed an assessment of the impact that the adoption of ASU 2016-02 will have on the consolidated financial statements and related disclosures. Based on that assessment, the Company has estimated that the adoption of ASU 2016-02 will result in the recognition of approximately $150 million to $170 million of right-of-use assets and lease liabilities based on the present value of future minimum lease payments for currently executed leases. The Company does not expect the adoption of this new guidance to have a significant impact on its Consolidated Statements of Operations or its Consolidated Statements of Cash Flows. Supplemental Cash Flow Information At June 28, 2019 , the Company had $13.9 million accrued to other long-term liabilities for capital equipment, and $80.6 million accrued to accounts payable for capital equipment. At September 28, 2018, the Company had $13.9 million accrued to other long-term liabilities for capital equipment, and $94.1 million accrued to accounts payable for capital equipment. These amounts accrued at June 28, 2019 , for capital equipment purchases have been excluded from the consolidated statements of cash flows for the nine months ended June 28, 2019 , and are expected to be paid in subsequent periods.

Marketable Securities

Marketable Securities	9 Months Ended
	Jun. 28, 2019
Investments, Debt and Equity Securities [Abstract]
MARKETABLE SECURITIES	. MARKETABLE SECURITIES The Company's portfolio of available-for-sale marketable securities consists of the following (in millions): Current Noncurrent Available for sale: June 28, 2019 September 28, June 28, 2019 September 28, U.S. Treasury and government $ 44.4 $ 65.0 $ 10.0 $ — Corporate bonds and notes 83.9 204.1 10.5 12.0 Municipal bonds 62.6 2.0 14.6 0.8 Other government 1.3 23.0 — 10.0 Total $ 192.2 $ 294.1 $ 35.1 $ 22.8 The contractual maturities of noncurrent available-for-sale marketable securities were due within two years or less. There were unrealized gains of $0.1 million on U.S. Treasury securities, $0.1 million on corporate bonds and notes, and $0.1 million on municipal bonds at June 28, 2019 , and $0.1 million in unrealized losses on municipal bonds at September 28, 2018

Fair Value

Fair Value	9 Months Ended
	Jun. 28, 2019
Fair Value Disclosures [Abstract]
FAIR VALUE	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 June 28, 2019 As of September 28, 2018 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* $ 742.8 $ 696.4 $ 46.4 $ — $ 733.3 $ 683.7 $ 49.6 $ — U.S. Treasury and government securities 54.4 20.3 34.1 — 65.0 15.0 50.0 — Corporate bonds and notes 94.4 — 94.4 — 216.0 — 216.0 — Municipal bonds 77.2 — 77.2 — 2.8 — 2.8 — Other government securities 1.3 — 1.3 — 33.1 — 33.1 — Total $ 970.1 $ 716.7 $ 253.4 $ — $ 1,050.2 $ 698.7 $ 351.5 $ — Liabilities Contingent consideration $ — $ — $ — $ — $ 3.1 $ — $ — $ 3.1 Total $ — $ — $ — $ — $ 3.1 $ — $ — $ 3.1 * Cash equivalents included in level 1 and 2 consist of money market funds and corporate bonds and notes, foreign government bonds, commercial paper, and agency securities purchased with less than ninety days until maturity. The following table summarizes changes to the fair value of the Level 3 liabilities during the three and nine months ended June 28, 2019 (in millions): Contingent consideration Balance as of September 28, 2018 $ 3.1 Decreases to contingent consideration included in earnings (3.1 ) Balance as of June 28, 2019 $ — 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. There were no indicators of impairment identified during the three and nine months ended June 28, 2019

Inventory

Inventory	9 Months Ended
	Jun. 28, 2019
Inventory, Net [Abstract]
INVENTORY	INVENTORY Inventory consists of the following (in millions): As of June 28, September 28, Raw materials $ 20.3 $ 20.2 Work-in-process 349.2 340.7 Finished goods 208.3 124.8 Finished goods held on consignment by customers 3.0 4.5 Total inventory $ 580.8 $ 490.2

Property, Plant And Equipment

Property, Plant And Equipment	9 Months Ended
	Jun. 28, 2019
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 June 28, September 28, Land and improvements $ 11.7 $ 11.6 Buildings and improvements 349.6 238.0 Furniture and fixtures 32.4 31.5 Machinery and equipment 2,282.9 2,089.6 Construction in progress 185.9 179.0 Total property, plant and equipment, gross 2,862.5 2,549.7 Accumulated depreciation (1,632.4 ) (1,408.8 ) Total property, plant and equipment, net $ 1,230.1 $ 1,140.9

Goodwill And Intangible Assets

Goodwill And Intangible Assets	9 Months Ended
	Jun. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	GOODWILL AND INTANGIBLE ASSETS There were no changes to the carrying amount of goodwill during the three and nine months ended June 28, 2019 . 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 and nine months ended June 28, 2019 . Intangible assets consist of the following (in millions): As of As of Weighted June 28, 2019 September 28, 2018 Gross Accumulated Net Gross Accumulated Net Customer relationships 3.4 $ 31.7 $ (23.8 ) $ 7.9 $ 31.7 $ (13.2 ) $ 18.5 Developed technology and other 4.1 100.0 (46.4 ) 53.6 89.9 (23.5 ) 66.4 Trademarks 3.0 1.6 (1.2 ) 0.4 1.6 (0.8 ) 0.8 Capitalized software 2.7 29.3 (13.0 ) 16.3 18.0 (6.0 ) 12.0 IPR&D 35.9 — 35.9 46.0 — 46.0 Total intangible assets $ 198.5 $ (84.4 ) $ 114.1 $ 187.2 $ (43.5 ) $ 143.7 Fully amortized intangible assets have been eliminated from both the gross and accumulated amortization amounts. Annual amortization expense for the next five fiscal years related to definite-lived intangible assets is expected to be as follows (in millions): Remaining 2019 2020 2021 2022 2023 Thereafter Amortization expense, cost of goods sold $ 7.3 $ 27.0 $ 4.9 $ 1.0 $ 0.9 $ 2.8 Amortization expense, operating expense $ 5.4 $ 16.6 $ 9.3 $ 0.9 $ 0.1 $ 2.0 Total amortization expense $ 12.7 $ 43.6 $ 14.2 $ 1.9 $ 1.0 $ 4.8

Income Taxes

Income Taxes	9 Months Ended
	Jun. 28, 2019
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The provision for income taxes consists of the following components (in millions): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, United States income taxes $ 1.8 $ 16.0 $ 52.7 $ 328.7 Foreign income taxes 16.0 8.3 31.3 27.1 Provision for income taxes $ 17.8 $ 24.3 $ 84.0 $ 355.8 Effective tax rate 11.0 % 7.8 % 11.6 % 36.0 % The difference between the Company’s effective tax rate and the 21.0% United States federal statutory rate for the three and nine months ended June 28, 2019 , 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 an increase in tax expense related to a change in the reserve for uncertain tax positions. The difference between the Company’s effective tax rate and the 24.6% United States federal statutory rate for the three and nine months ended June 29, 2018 , resulted primarily from a decrease to tax expense related to an adjustment to the mandatory deemed repatriation tax on foreign earnings, foreign earnings taxed at rates lower than the federal statutory rate, the domestic production activities deduction, research and experimentation tax credits earned, and a benefit related to windfall stock deductions, partially offset by an increase in tax expense related to a change in the reserve for uncertain tax positions. During the nine months ended June 29, 2018 , these amounts in the table above included a one-time charge of $238.0 million related to the mandatory deemed repatriation tax on foreign earnings and a one-time charge of $18.5 million related to the revaluation of the deferred tax assets and liabilities related to tax reform. On December 22, 2017, the President of the United States signed into law new tax legislation (the “Tax Reform Act”). In addition to the introduction of a modified territorial tax system, the Tax Reform Act includes two new sets of provisions aimed at preventing or decreasing U.S. tax base erosion—the GILTI provisions and the base erosion and anti-abuse tax (“BEAT”) provisions. The GILTI provisions impose taxes on foreign income in excess of a deemed return on tangible assets of foreign corporations. The Company is making an accounting policy election to account for GILTI as a component of tax expense in the period in which the Company is subject to the rules and therefore will not provide any deferred tax impacts of GILTI in its consolidated financial statements for the three and nine months ended June 28, 2019 . The BEAT provisions eliminate the deduction of certain base-erosion payments made to related foreign corporations, and impose a minimum tax if greater than regular tax. These BEAT provisions are effective for the Company beginning in fiscal 2019. The Company has analyzed the BEAT provisions for the three and nine months ended June 28, 2019 , and is not subject to the minimum tax imposed by the BEAT provisions. Other significant provisions of the Tax Reform Act that are effective in fiscal 2019 and that have an impact on the Company’s income taxes include the inclusion of performance-based compensation in determining the excessive compensation limitation and the benefit related to FDII. The Company operates under a tax holiday in Singapore, which is effective through September 30, 2020. The Company has completed negotiations for an extension of this tax holiday through September 30, 2030. The current tax holiday and extension are both conditioned upon the Company's compliance with certain employment and investment thresholds in Singapore. Accrued taxes of $26.2 million and $43.8 million have been included in other current liabilities within the consolidated balance sheets as of June 28, 2019 , and September 28, 2018 , respectively. The deemed repatriation tax is payable over the next seven years, $18.0 million per year for each of the next four years, followed by payments of $33.6 million , $44.9 million , and $56.1 million in years five through seven, respectively. The Company has accrued $188.6 million and $206.6 million of the deemed repatriation tax in long-term liabilities within the consolidated balance sheet as of June 28, 2019 , and September 28, 2018 , respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Jun. 28, 2019
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/or 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 Indemnifications 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.

Stockholder's Equity

Stockholder's Equity	9 Months Ended
	Jun. 28, 2019
Stockholders' Equity Note [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY Stock Repurchase Program On January 30, 2019 , the Board of Directors approved a 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 prior to January 30, 2021 , on the open market or in privately negotiated transactions, as permitted by securities laws and other legal requirements. This newly authorized stock repurchase plan replaced in its entirety the January 31, 2018, stock repurchase program. The timing and amount of any shares of the Company’s common stock that are repurchased under the new repurchase program will be determined by the Company’s management based on its evaluation of market conditions and other factors. During the three months ended June 28, 2019 , the Company paid $85.8 million (including commissions) in connection with the repurchase of 1.2 million shares of its common stock (paying an average price of $72.20 per share). During the nine months ended June 28, 2019 , the Company paid $511.3 million (including commissions) in connection with the repurchase of 6.9 million shares of its common stock (paying an average price of $73.85 per share). As of June 28, 2019 , $1.8 billion remained available under the existing stock repurchase authorization. Dividends On August 7, 2019 , the Company announced that the Board of Directors had declared a cash dividend on its common stock of $0.44 per share, payable on September 17, 2019 , to the Company’s stockholders of record as of the close of business on August 27, 2019 . During the three and nine months ended June 28, 2019 , dividends charged to retained earnings were as follows (in millions, except per share data): 2019 Per share Total Amount First quarter $ 0.38 $ 67.1 Second quarter 0.38 66.0 Third quarter 0.38 65.7 Total $ 1.14 $ 198.8 Share-based Compensation The following table summarizes the share-based compensation expense by line item in the Statements of Operations (in millions): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Cost of goods sold $ 1.3 $ 3.3 $ 8.2 $ 11.6 Research and development 9.5 6.5 31.9 32.2 Selling, general and administrative 5.2 9.7 18.5 42.5 Total share-based compensation $ 16.0 $ 19.5 $ 58.6 $ 86.3

Earnings Per Share

Earnings Per Share	9 Months Ended
	Jun. 28, 2019
Earnings Per Share [Abstract]
EARNINGS PER SHARE	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 Nine Months Ended June 28, June 29, June 28, June 29, Net income $ 144.1 $ 286.5 $ 643.0 $ 632.9 Weighted average shares outstanding – basic 172.6 181.2 174.3 182.3 Dilutive effect of equity based awards 0.8 1.6 0.9 1.9 Weighted average shares outstanding – diluted 173.4 182.8 175.2 184.2 Net income per share – basic $ 0.83 $ 1.58 $ 3.69 $ 3.47 Net income per share – diluted $ 0.83 $ 1.57 $ 3.67 $ 3.44 Anti-dilutive common stock equivalents 1.0 0.2 1.5 0.2 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 and nine months ended June 28, 2019 , and June 29, 2018 , using the treasury stock method. 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)	9 Months Ended
	Jun. 28, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	2. REVENUE RECOGNITION Change in Accounting Policy The Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606), in the first quarter of fiscal 2019 for open contracts not completed as of the adoption date using the modified retrospective approach. The impact from the cumulative effect adjustment was not material and comparative information for prior periods has not been adjusted. The impact of applying the new standard on the Company’s consolidated financial statements for the nine months ended June 28, 2019 , was not material, except for an increase in accounts receivable and other current liabilities in the amount of $29.4 million to reflect customer credits as a liability. Revenue Recognition Policy The Company derives its revenue primarily from the sale of semiconductor products under individual customer purchase orders, some of which have underlying master sales agreements that specify terms governing the product sales. In the absence of a sales agreement, the Company’s standard terms and conditions apply. Revenue is recognized when control of the promised goods or services is transferred to the Company’s customers, in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company applies a five-step approach as defined in the new standard in determining the amount and timing of revenue to be recognized: (1) identifying the contract with a customer; (2) identifying the performance obligations in the contract; (3) determining the transaction price; (4) allocating the transaction price to the performance obligations in the contract; and (5) recognizing revenue when the corresponding performance obligation is satisfied. Performance Obligations Each distinct promise to transfer products is considered to be an identified performance obligation for which revenue is recognized at a point in time upon transfer of control of the products to the customer. Transfer of control occurs upon shipment to the distributor or direct customer or when products are pulled from consignment inventory by the customer. Point in time recognition is determined as products manufactured under non-cancellable orders create an asset with an alternative use to the Company. Returns under the Company’s general assurance warranty of products have not been material and warranty-related services are not considered a separate performance obligation. As of June 28, 2019 , the amount of remaining performance obligation that has not been recognized as revenue is not material. Transaction Price Pricing adjustments and estimates of returns are treated as variable consideration for purposes of determining the transaction price. Sales returns are generally accepted at the Company’s discretion or from distributors with stock rotation rights. Stock rotation allows distributors limited levels of returns and is based on the distributor’s prior purchases. Price protection represents price discounts granted to certain distributors and is based on negotiations on sales to end customers. Variable consideration is estimated using the expected value method considering all reasonably available information, including the Company’s historical experience and its current expectations, and is reflected in the transaction price when sales are recorded. The Company records net revenue excluding taxes collected on its sales to trade customers. Contract Balances Accounts receivable represents the Company’s unconditional right to receive consideration from its customer. Payments are due within one year of invoicing and do not include a significant financing component. To date, there have been no material impairment losses on accounts receivable. There were no material contract assets or contract liabilities recorded on the consolidated balance sheet in any of the periods presented. All incremental customer contract acquisition costs are expensed as they are incurred as the amortization period of the asset that the Company otherwise would have recognized is one year or less in duration. Disaggregate Revenue The Company has a single reportable operating segment which designs, develops, manufactures and markets similar proprietary semiconductor products, including intellectual property. In reaching this conclusion, management considers the definition of the chief operating decision maker (“CODM”), how the business is defined by the CODM, the nature of the information provided to the CODM and how that information is used to make operating decisions, allocate resources and assess performance. The Company’s CODM is the president and chief executive officer. The results of operations provided to and analyzed by the CODM are at the consolidated level, and accordingly, key resource decisions and assessment of performance are performed at the consolidated level. The Company assesses its determination of operating segments at least annually. The Company disaggregates revenue from contracts with customers by geography 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. Net revenue by geographic area is presented based upon the location of the original equipment manufacturers’ (“OEMs”) headquarters and is as follows (in millions): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, United States $ 355.7 $ 390.2 $ 1,358.9 $ 1,436.9 China 212.9 272.6 606.8 714.3 South Korea 76.9 94.2 282.0 331.0 Taiwan 78.0 90.9 182.8 252.5 Europe, Middle East and Africa 36.4 40.7 100.2 108.0 Other Asia-Pacific 7.0 5.7 18.7 16.9 Total $ 767.0 $ 894.3 $ 2,549.4 $ 2,859.6 The Company’s revenue from external customers is generated principally from the sale of semiconductor products that facilitate various wireless communication applications. Accordingly, the Company considers its product offerings to be similar in nature and therefore not segregated for reporting purposes.

Description Of Business and B_2

Description Of Business and Basis Of Presentation (Policies)	9 Months Ended
	Jun. 28, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition Policy The Company derives its revenue primarily from the sale of semiconductor products under individual customer purchase orders, some of which have underlying master sales agreements that specify terms governing the product sales. In the absence of a sales agreement, the Company’s standard terms and conditions apply. Revenue is recognized when control of the promised goods or services is transferred to the Company’s customers, in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company applies a five-step approach as defined in the new standard in determining the amount and timing of revenue to be recognized: (1) identifying the contract with a customer; (2) identifying the performance obligations in the contract; (3) determining the transaction price; (4) allocating the transaction price to the performance obligations in the contract; and (5) recognizing revenue when the corresponding performance obligation is satisfied.
Fiscal Period	The Company’s fiscal year ends on the Friday closest to September 30. Fiscal 2019 consists of 52 weeks and ends on September 27, 2019 . Fiscal 2018 consisted of 52 weeks and ended on September 28, 2018 . The third quarters of fiscal 2019 and 2018 each consisted of 13 weeks and ended on June 28, 2019 , and June 29, 2018 , respectively.
Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements In August 2015, the Financial Accounting Standards Board (“FASB”) deferred the effective date of Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606), (“ASU 2014-09”), which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The Company adopted ASU 2014-09 at the beginning of the first quarter of fiscal 2019 using the modified retrospective approach, with the cumulative effect of applying the new guidance recognized as an adjustment to the opening retained earnings balance. The Company has determined the impact of the new revenue standard on its business processes, systems, controls and consolidated financial statements is not material. Refer to Note 2 , Revenue Recognition, for additional information. In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740), Intra-entity Transfers of an Asset Other than Inventory (“ASU 2016-16”). This ASU provides guidance that changes the accounting for income tax effects of intra-entity transfers of assets other than inventory. Under the new guidance, the selling (transferring) entity is required to recognize a current tax expense or benefit upon transfer of the asset. Similarly, the purchasing (receiving) entity is required to recognize a deferred tax asset or deferred tax liability, as well as the related deferred tax benefit or expense, upon receipt of the asset. The Company adopted ASU 2016-16 during the first quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments (Topic 320), (“ASU 2016-13”). This ASU requires a financial asset (or a group of financial assets) measured on the basis of amortized cost to be presented at the net amount expected to be collected. This ASU requires that the income statement reflect the measurement of credit losses for newly recognized financial assets as well as the expected increases or decreases of expected credit losses that have taken place during the period. This ASU requires that credit losses of debt securities designated as available-for-sale be recorded through an allowance for credit losses. The ASU also limits the credit loss to the amount by which fair value is below amortized cost. The Company adopted ASU 2016-13 during the first quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (Topic 320), (“ASU 2016-01”). This ASU provides guidance for the recognition, measurement, presentation, and disclosure of financial assets and liabilities. The Company adopted ASU 2016-01 during the first quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In June 2018, the FASB issued ASU 2018-07, Compensation-Stock Compensation (Topic 718), Improvements to Nonemployee Share-based Payments (“ASU 2018-07”). This ASU expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The Company adopted ASU 2018-07 during the second quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Topic 350), Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (“ASU 2018-15”). The new guidance clarifies the accounting for implementation costs in cloud computing arrangements. The Company adopted ASU 2018-15, on a prospective basis, during the second quarter of fiscal 2019. The adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”). This ASU requires lessees to reflect leases with a term greater than one year on their balance sheet as assets and obligations. The Company plans to adopt the new guidance in the first quarter of fiscal 2020. The Company will utilize the modified retrospective method and will recognize any cumulative effect adjustment in retained earnings at the beginning of the period of adoption. The Company plans to elect the package of three practical expedients that permits the Company to maintain its historical conclusions about lease identification, lease classification and initial direct costs for leases that exist at the date of adoption. Further, upon implementation of the new guidance, the Company intends to elect the practical expedient to not separate lease and non-lease components. The Company has performed an assessment of the impact that the adoption of ASU 2016-02 will have on the consolidated financial statements and related disclosures. Based on that assessment, the Company has estimated that the adoption of ASU 2016-02 will result in the recognition of approximately $150 million to $170 million of right-of-use assets and lease liabilities based on the present value of future minimum lease payments for currently executed leases. The Company does not expect the adoption of this new guidance to have a significant impact on its Consolidated Statements of Operations or its Consolidated Statements of Cash Flows.

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Jun. 28, 2019
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 Available for sale: June 28, 2019 September 28, June 28, 2019 September 28, U.S. Treasury and government $ 44.4 $ 65.0 $ 10.0 $ — Corporate bonds and notes 83.9 204.1 10.5 12.0 Municipal bonds 62.6 2.0 14.6 0.8 Other government 1.3 23.0 — 10.0 Total $ 192.2 $ 294.1 $ 35.1 $ 22.8
Available-for-sale Securities

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Jun. 28, 2019
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 June 28, 2019 As of September 28, 2018 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* $ 742.8 $ 696.4 $ 46.4 $ — $ 733.3 $ 683.7 $ 49.6 $ — U.S. Treasury and government securities 54.4 20.3 34.1 — 65.0 15.0 50.0 — Corporate bonds and notes 94.4 — 94.4 — 216.0 — 216.0 — Municipal bonds 77.2 — 77.2 — 2.8 — 2.8 — Other government securities 1.3 — 1.3 — 33.1 — 33.1 — Total $ 970.1 $ 716.7 $ 253.4 $ — $ 1,050.2 $ 698.7 $ 351.5 $ — Liabilities Contingent consideration $ — $ — $ — $ — $ 3.1 $ — $ — $ 3.1 Total $ — $ — $ — $ — $ 3.1 $ — $ — $ 3.1
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following table summarizes changes to the fair value of the Level 3 liabilities during the three and nine months ended June 28, 2019 (in millions): Contingent consideration Balance as of September 28, 2018 $ 3.1 Decreases to contingent consideration included in earnings (3.1 ) Balance as of June 28, 2019 $ —

Inventory (Tables)

Inventory (Tables)	9 Months Ended
	Jun. 28, 2019
Inventory, Net [Abstract]
Schedule Of Inventories	Inventory consists of the following (in millions): As of June 28, September 28, Raw materials $ 20.3 $ 20.2 Work-in-process 349.2 340.7 Finished goods 208.3 124.8 Finished goods held on consignment by customers 3.0 4.5 Total inventory $ 580.8 $ 490.2

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Jun. 28, 2019
Property, Plant and Equipment [Abstract]
Schedule Of Property, Plant And Equipment	Property, plant and equipment, net consists of the following (in millions): As of June 28, September 28, Land and improvements $ 11.7 $ 11.6 Buildings and improvements 349.6 238.0 Furniture and fixtures 32.4 31.5 Machinery and equipment 2,282.9 2,089.6 Construction in progress 185.9 179.0 Total property, plant and equipment, gross 2,862.5 2,549.7 Accumulated depreciation (1,632.4 ) (1,408.8 ) Total property, plant and equipment, net $ 1,230.1 $ 1,140.9

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Jun. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets Excluding Goodwill	Intangible assets consist of the following (in millions): As of As of Weighted June 28, 2019 September 28, 2018 Gross Accumulated Net Gross Accumulated Net Customer relationships 3.4 $ 31.7 $ (23.8 ) $ 7.9 $ 31.7 $ (13.2 ) $ 18.5 Developed technology and other 4.1 100.0 (46.4 ) 53.6 89.9 (23.5 ) 66.4 Trademarks 3.0 1.6 (1.2 ) 0.4 1.6 (0.8 ) 0.8 Capitalized software 2.7 29.3 (13.0 ) 16.3 18.0 (6.0 ) 12.0 IPR&D 35.9 — 35.9 46.0 — 46.0 Total intangible assets $ 198.5 $ (84.4 ) $ 114.1 $ 187.2 $ (43.5 ) $ 143.7
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 is expected to be as follows (in millions): Remaining 2019 2020 2021 2022 2023 Thereafter Amortization expense, cost of goods sold $ 7.3 $ 27.0 $ 4.9 $ 1.0 $ 0.9 $ 2.8 Amortization expense, operating expense $ 5.4 $ 16.6 $ 9.3 $ 0.9 $ 0.1 $ 2.0 Total amortization expense $ 12.7 $ 43.6 $ 14.2 $ 1.9 $ 1.0 $ 4.8

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Jun. 28, 2019
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 Nine Months Ended June 28, June 29, June 28, June 29, United States income taxes $ 1.8 $ 16.0 $ 52.7 $ 328.7 Foreign income taxes 16.0 8.3 31.3 27.1 Provision for income taxes $ 17.8 $ 24.3 $ 84.0 $ 355.8 Effective tax rate 11.0 % 7.8 % 11.6 % 36.0 %

Stockholder's Equity (Tables)

Stockholder's Equity (Tables)	9 Months Ended
	Jun. 28, 2019
Stockholders' Equity Note [Abstract]
Dividends Declared
Schedule of share-based compensation expense	The following table summarizes the share-based compensation expense by line item in the Statements of Operations (in millions): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Cost of goods sold $ 1.3 $ 3.3 $ 8.2 $ 11.6 Research and development 9.5 6.5 31.9 32.2 Selling, general and administrative 5.2 9.7 18.5 42.5 Total share-based compensation $ 16.0 $ 19.5 $ 58.6 $ 86.3

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Jun. 28, 2019
Earnings Per Share [Abstract]
Schedule Of Earnings Per Share	he following table sets forth the computation of basic and diluted earnings per share (in millions, except per share amounts): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Net income $ 144.1 $ 286.5 $ 643.0 $ 632.9 Weighted average shares outstanding – basic 172.6 181.2 174.3 182.3 Dilutive effect of equity based awards 0.8 1.6 0.9 1.9 Weighted average shares outstanding – diluted 173.4 182.8 175.2 184.2 Net income per share – basic $ 0.83 $ 1.58 $ 3.69 $ 3.47 Net income per share – diluted $ 0.83 $ 1.57 $ 3.67 $ 3.44 Anti-dilutive common stock equivalents 1.0 0.2 1.5 0.2

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Jun. 28, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The Company disaggregates revenue from contracts with customers by geography 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. Net revenue by geographic area is presented based upon the location of the original equipment manufacturers’ (“OEMs”) headquarters and is as follows (in millions): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, United States $ 355.7 $ 390.2 $ 1,358.9 $ 1,436.9 China 212.9 272.6 606.8 714.3 South Korea 76.9 94.2 282.0 331.0 Taiwan 78.0 90.9 182.8 252.5 Europe, Middle East and Africa 36.4 40.7 100.2 108.0 Other Asia-Pacific 7.0 5.7 18.7 16.9 Total $ 767.0 $ 894.3 $ 2,549.4 $ 2,859.6

Description Of Business and B_3

Description Of Business and Basis Of Presentation (Details)	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of weeks in fiscal year			1 year	1 year
Number of weeks in fiscal quarter	3 months	3 months

Description Of Business and B_4

Description Of Business and Basis Of Presentation (New Accounting Pronouncements) (Details) $ in Millions	9 Months Ended
	Jun. 28, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Document Period End Date	Jun. 28, 2019
Minimum [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 150
Maximum [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 170

Description Of Business and B_5

Description Of Business and Basis Of Presentation (Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jun. 28, 2019	Sep. 28, 2018
Supplemental Cash Flow Elements [Abstract]
Asset retirement obligations, noncurrent	$ 13.9	$ 13.9
Capital expenditures incurred but not yet paid	$ 80.6	$ 94.1

Marketable Securities (Details)

Marketable Securities (Details) - USD ($) $ in Millions	Jun. 28, 2019	Sep. 28, 2018
Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	$ 192.2	$ 294.1
Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	35.1	22.8
US Treasury and Government [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	54.4
US Treasury and Government [Member] | Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	44.4	65
US Treasury and Government [Member] | Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	10	0
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	94.4
Corporate Debt Securities [Member] | Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	83.9	204.1
Corporate Debt Securities [Member] | Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	10.5	12
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	77.2
US States and Political Subdivisions Debt Securities [Member] | Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	62.6	2
US States and Political Subdivisions Debt Securities [Member] | Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	14.6	0.8
Debt Security, Government, Non-US [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	1.3
Debt Security, Government, Non-US [Member] | Other Current Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	1.3	23
Debt Security, Government, Non-US [Member] | Other Noncurrent Assets [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	$ 0	$ 10

Marketable Securities Schedule

Marketable Securities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Millions	Jun. 28, 2019	Sep. 28, 2018
US Treasury and Government [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	$ 0.1
Available-for-sale Securities	54.4
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0.1
Available-for-sale Securities	94.4
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0.1
Available-for-sale Securities	77.2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax		$ 0.1
Debt Security, Government, Non-US [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	$ 1.3

Marketable Securities Contractu

Marketable Securities Contractual Maturity (Details)	9 Months Ended
	Jun. 28, 2019
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Debt Maturities, Date	2 years

Fair Value (Fair value transfer

Fair Value (Fair value transfers) (Details)	9 Months Ended
	Jun. 28, 2019USD ($)
Fair Value Disclosures [Abstract]
Transfer of assets from L1 to L2	$ 0
Transfers of assets from L2 to L1	0
Transfers of assets into L3	0
Transfer of liabilities from L1 to L2	0
Transfers of liabilities from L2 to L1	$ 0

Fair Value (Schedule Of Financi

Fair Value (Schedule Of Financial Instruments Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 28, 2019	Sep. 28, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ 0	$ 3.1
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	742.8	733.3
Assets, Fair Value Disclosure, Recurring (Deprecated 2018-01-31)	970.1	1,050.2
Contingent consideration	0	3.1
Total	0	3.1
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	696.4	683.7
Assets, Fair Value Disclosure, Recurring (Deprecated 2018-01-31)	716.7	698.7
Contingent consideration	0	0
Total	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	46.4	49.6
Assets, Fair Value Disclosure, Recurring (Deprecated 2018-01-31)	253.4	351.5
Contingent consideration	0	0
Total	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Assets, Fair Value Disclosure, Recurring (Deprecated 2018-01-31)	0	0
Contingent consideration	0	3.1
Total	0	3.1
US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	54.4
US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		65
US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	20.3	15
US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	34.1	50
US Treasury and Government [Member] | Fair Value, Measurements, Recurring [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	94.4
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		216
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [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, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	94.4	216
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [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	77.2
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		2.8
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [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, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	77.2	2.8
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [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
Debt Security, Government, Non-US [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1.3
Debt Security, Government, Non-US [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		33.1
Debt Security, Government, Non-US [Member] | Fair Value, Measurements, Recurring [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
Debt Security, Government, Non-US [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	1.3	33.1
Debt Security, Government, Non-US [Member] | Fair Value, Measurements, Recurring [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 (Fair Value Liabilit

Fair Value (Fair Value Liabilities Measured on Recurring Basis Unobservable Input Reconciliation) (Details) $ in Millions	9 Months Ended
	Jun. 28, 2019USD ($)
Fair Value, Liabilities [Roll Forward]
Balance as of September 29, 2017	$ 3.1
Decreases to contingent consideration included in earnings	(3.1)
Balance as of June 29, 2018	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Liabilities [Roll Forward]
Balance as of September 29, 2017	3.1
Balance as of June 29, 2018	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Liabilities [Roll Forward]
Balance as of September 29, 2017	3.1
Balance as of June 29, 2018	$ 0

Inventory (Schedule Of Inventor

Inventory (Schedule Of Inventories) (Details) - USD ($) $ in Millions	Jun. 28, 2019	Sep. 28, 2018
Inventory, Net [Abstract]
Raw materials	$ 20.3	$ 20.2
Work-in-process	349.2	340.7
Finished goods	208.3	124.8
Finished goods held on consignment by customers	3	4.5
Total inventory	$ 580.8	$ 490.2

Property, Plant and Equipment_2

Property, Plant and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Jun. 28, 2019	Sep. 28, 2018
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 2,862.5	$ 2,549.7
Accumulated depreciation	(1,632.4)	(1,408.8)
Total property, plant and equipment, net	1,230.1	1,140.9
Land and improvements [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	11.7	11.6
Building and improvements [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	349.6	238
Furniture and fixtures [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	32.4	31.5
Machinery and equipment [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	2,282.9	2,089.6
Construction in progress [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 185.9	$ 179

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 28, 2019	Sep. 28, 2018
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (84.4)	$ (43.5)
Total intangible assets, Gross Carrying Amount	198.5	187.2
Total intangible assets, Net Carrying Amount	$ 114.1	143.7
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	3 years 4 months 24 days
Finite-Lived Intangible Assets, Gross	$ 31.7	31.7
Accumulated Amortization	(23.8)	(13.2)
Net Carrying Amount	$ 7.9	18.5
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	4 years 1 month 6 days
Finite-Lived Intangible Assets, Gross	$ 100	89.9
Accumulated Amortization	(46.4)	(23.5)
Net Carrying Amount	$ 53.6	66.4
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	3 years
Finite-Lived Intangible Assets, Gross	$ 1.6	1.6
Accumulated Amortization	(1.2)	(0.8)
Net Carrying Amount	$ 0.4	0.8
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	2 years 8 months 12 days
Finite-Lived Intangible Assets, Gross	$ 29.3	18
Accumulated Amortization	(13)	(6)
Net Carrying Amount	$ 16.3	12
In Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	0 years
Finite-Lived Intangible Assets, Gross	$ 35.9	46
Accumulated Amortization	0	0
Net Carrying Amount	$ 35.9	$ 46

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	Jun. 28, 2019USD ($)
Expected Annual Amortization Expense related to intangible assets for the next five years [Line Items]
Remaining 2019	$ 12.7
2020	43.6
2021	14.2
2022	1.9
2023	1
Thereafter	4.8
Cost of sales [Member]
Expected Annual Amortization Expense related to intangible assets for the next five years [Line Items]
Remaining 2019	7.3
2020	27
2021	4.9
2022	1
2023	0.9
Thereafter	2.8
Operating Expense [Member]
Expected Annual Amortization Expense related to intangible assets for the next five years [Line Items]
Remaining 2019	5.4
2020	16.6
2021	9.3
2022	0.9
2023	0.1
Thereafter	$ 2

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Income Tax Disclosure [Abstract]
United States income taxes	$ 1.8	$ 16	$ 52.7	$ 328.7
Foreign income taxes	16	8.3	31.3	27.1
Provision for income taxes	$ 17.8	$ 24.3	$ 84	$ 355.8
Effective tax rate	11.00%	7.80%	11.60%	36.00%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Dec. 29, 2017	Jun. 28, 2019	Jun. 29, 2018
Federal statutory income tax rate		21.00%	24.60%
Repatriation of foreign earnings, amount	$ 238
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 18.5
Accrued income taxes, current		$ 26.2	$ 43.8
Accrued Income Taxes, Noncurrent		188.6	$ 206.6
Years One through Four [Member] [Domain]
taxes payable, repatriation tax		18
Year Five [Member] [Domain]
taxes payable, repatriation tax		33.6
Year Six [Member]
taxes payable, repatriation tax		44.9
Years One through Five [Member]
taxes payable, repatriation tax		$ 56.1

Stockholder's Equity (Share Rep

Stockholder's Equity (Share Repurchase) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Jan. 30, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 29, 2017	Jun. 28, 2019
Equity, Class of Treasury Stock [Line Items]
Share repurchase authorized date	Jan. 30, 2019
Authorized amount of stock for repurchase	$ 2,000
Stock repurchase program expiration date	Jan. 30, 2021
Stock repurchased		$ 85.8	$ 141.5	$ 284	$ 240.2	$ 111.8	$ 172.5	$ 511.3
Treasury Stock, Shares, Acquired		1.2						6.9
Average price of stock repurchased (in dollars per share)		$ 72.20						$ 73.85
Remaining amount authorized fro stock repurchase		$ 1,800						$ 1,800

Stockholder's Equity (Dividend)

Stockholder's Equity (Dividend) (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 17, 2019	Aug. 27, 2019	Aug. 07, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 28, 2018	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Dividends Payable [Line Items]
Cash dividends declared and paid per share (usd per share)				$ 0.38	$ 0.38	$ 0.38	$ 0.32	$ 1.14	$ 0.96
Payments of ordinary dividends				$ 65.7	$ 66	$ 67.1		$ 198.8
Subsequent Event [Member] | Dividend Declared [Member]
Dividends Payable [Line Items]
Dividend declaration date			Aug. 7, 2019
Dividends declared (usd per share)	$ 0.44
dividends date to be paid	Sep. 17, 2019
Dividends date of record		Aug. 27, 2019

Stockholder's Equity (Share Bas

Stockholder's Equity (Share Based Compensation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 16	$ 19.5	$ 58.6	$ 86.3
Cost of sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	1.3	3.3	8.2	11.6
Research and development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	9.5	6.5	31.9	32.2
Selling, general and administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 5.2	$ 9.7	$ 18.5	$ 42.5

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						9 Months Ended
	Jun. 28, 2019	Mar. 29, 2019	Dec. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 29, 2017	Jun. 28, 2019	Jun. 29, 2018
Earnings Per Share [Abstract]
Net income	$ 144.1	$ 214	$ 284.9	$ 286.5	$ 276	$ 70.4	$ 643	$ 632.9
Weighted average shares outstanding - basic (shares)	172.6			181.2			174.3	182.3
Dilutive effect of equity based awards (shares)	0.8			1.6			0.9	1.9
Weighted average shares outstanding - diluted (shares)	173.4			182.8			175.2	184.2
Net income per share - basic (usd per share)	$ 0.83			$ 1.58			$ 3.69	$ 3.47
Net income per share - diluted (usd per share)	$ 0.83			$ 1.57			$ 3.67	$ 3.44
Anti-dilutive common stock equivalents (shares)	1			0.2			1.5	0.2

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 767	$ 894.3	$ 2,549.4	$ 2,859.6
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues	355.7	390.2	1,358.9	1,436.9
CHINA
Disaggregation of Revenue [Line Items]
Revenues	212.9	272.6	606.8	714.3
KOREA, REPUBLIC OF
Disaggregation of Revenue [Line Items]
Revenues	76.9	94.2	282	331
TAIWAN, PROVINCE OF CHINA
Disaggregation of Revenue [Line Items]
Revenues	78	90.9	182.8	252.5
EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenues	36.4	40.7	100.2	108
Asia, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 7	$ 5.7	$ 18.7	$ 16.9

Revenue Recognition Text (Detai

Revenue Recognition Text (Details) $ in Millions	9 Months Ended
	Jun. 28, 2019USD ($)
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 29.4