$KLAC
KLA CORP Stock $klac

$klac Overview Financials Valuation SEC Filings Company Website

2021 Q2 Form 10-K Financial Statement

#000031920121000029 Filed on August 06, 2021

Income Statement

Concept	2021 Q2	2021 Q1	2020 Q4
Revenue	$1.925B	$1.804B	$1.651B
YoY Change	31.92%	26.67%	9.37%
Cost Of Revenue	$772.3M	$709.6M	$669.7M
YoY Change	24.26%	20.24%	5.7%
Gross Profit	$1.153B	$1.094B	$981.1M
YoY Change	37.61%	31.22%	12.02%
Gross Profit Margin	59.89%	60.66%	59.43%
Selling, General & Admin	$180.3M	$183.0M	$181.9M
YoY Change	17.45%	-1.46%	-5.38%
% of Gross Profit	15.63%	16.73%	18.54%
Research & Development	$241.4M	$239.0M	$229.1M
YoY Change	11.19%	10.92%	3.77%
% of Gross Profit	20.93%	21.84%	23.35%
Depreciation & Amortization	$84.63M	$84.40M	$84.20M
YoY Change	7.27%	2.93%	-4.86%
% of Gross Profit	7.34%	7.71%	8.58%
Operating Expenses	$433.5M	$422.0M	$411.0M
YoY Change	12.61%	5.19%	-0.49%
Operating Profit	$719.8M	$672.1M	$570.2M
YoY Change	58.84%	55.37%	23.19%
Interest Expense	-$39.91M	$39.09M	$38.88M
YoY Change	-0.72%	-0.35%	-3.93%
% of Operating Profit	-5.54%	5.82%	6.82%
Other Income/Expense, Net	$29.03M	$7.348M	-$3.882M
YoY Change	-467.51%	631.87%	-251.17%
Pretax Income	$708.8M	$640.4M	$527.4M
YoY Change	74.98%	455.91%	24.12%
Income Tax	$75.79M	$73.23M	$70.42M
% Of Pretax Income	10.69%	11.44%	13.35%
Net Earnings	$633.0M	$567.5M	$457.3M
YoY Change	53.91%	623.37%	20.15%
Net Earnings / Revenue	32.87%	31.46%	27.7%
Basic Earnings Per Share	$4.14	$3.69	$2.96
Diluted Earnings Per Share	$4.10	$3.66	$2.94
COMMON SHARES
Basic Shares Outstanding	153.3M shares	153.8M shares	154.3M shares
Diluted Shares Outstanding		155.2M shares	155.6M shares

Balance Sheet

Concept	2021 Q2	2021 Q1	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.495B	$2.443B	$2.297B
YoY Change	25.96%	49.45%	36.9%
Cash & Equivalents	$1.435B	$1.452B	$1.431B
Short-Term Investments	$1.060B	$990.6M	$865.1M
Other Short-Term Assets	$320.9M	$309.9M	$286.6M
YoY Change	-1.17%	3.1%	11.31%
Inventory	$1.575B	$1.451B	$1.421B
Prepaid Expenses	$76.65M	$59.69M	$71.33M
Receivables	$1.305B	$1.202B	$1.219B
Other Receivables	$68.85M	$53.80M	$37.70M
Total Short-Term Assets	$5.696B	$5.405B	$5.223B
YoY Change	20.59%	25.16%	19.32%
LONG-TERM ASSETS
Property, Plant & Equipment	$663.0M	$628.4M	$594.2M
YoY Change	27.55%	26.26%	21.27%
Goodwill	$2.011B	$2.011B	$2.045B
YoY Change	-1.67%	-1.56%	-11.06%
Intangibles	$1.185B	$1.238B	$1.290B
YoY Change	-14.81%	-13.93%	-13.58%
Long-Term Investments
YoY Change
Other Assets	$444.9M	$416.0M	$403.5M
YoY Change	22.57%	22.07%	6.79%
Total Long-Term Assets	$4.575B	$4.534B	$4.592B
YoY Change	0.41%	0.15%	-5.78%
TOTAL ASSETS
Total Short-Term Assets	$5.696B	$5.405B	$5.223B
Total Long-Term Assets	$4.575B	$4.534B	$4.592B
Total Assets	$10.27B	$9.939B	$9.815B
YoY Change	10.68%	12.36%	6.1%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$342.1M	$295.1M	$262.5M
YoY Change	29.44%	21.33%	2.28%
Accrued Expenses	$822.9M	$830.1M	$855.3M
YoY Change	15.06%	17.96%	11.76%
Deferred Revenue
YoY Change
Short-Term Debt	$20.00M	$20.00M	$20.00M
YoY Change
Long-Term Debt Due	$20.00M	$20.00M	$20.00M
YoY Change
Total Short-Term Liabilities	$2.103B	$2.029B	$2.020B
YoY Change	23.73%	22.75%	17.57%
LONG-TERM LIABILITIES
Long-Term Debt	$3.423B	$3.422B	$3.441B
YoY Change	-1.35%	-0.63%	1.22%
Other Long-Term Liabilities	$631.3M	$658.0M	$668.0M
YoY Change	-6.1%	-2.65%	0.64%
Total Long-Term Liabilities	$631.3M	$4.080B	$4.109B
YoY Change	-84.76%	-0.97%	1.13%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.103B	$2.029B	$2.020B
Total Long-Term Liabilities	$631.3M	$4.080B	$4.109B
Total Liabilities	$6.895B	$6.826B	$6.864B
YoY Change	4.49%	4.69%	4.6%
SHAREHOLDERS EQUITY
Retained Earnings	$1.277B	$1.070B	$903.7M
YoY Change	95.0%	184.11%	25.69%
Common Stock	$2.176B
YoY Change	4.1%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.378B	$3.115B	$2.935B
YoY Change
Total Liabilities & Shareholders Equity	$10.27B	$9.939B	$9.815B
YoY Change	10.68%	12.36%	6.1%

Cashflow Statement

Concept	2021 Q2	2021 Q1	2020 Q4
OPERATING ACTIVITIES
Net Income	$633.0M	$567.5M	$457.3M
YoY Change	53.91%	623.37%	20.15%
Depreciation, Depletion And Amortization	$84.63M	$84.40M	$84.20M
YoY Change	7.27%	2.93%	-4.86%
Cash From Operating Activities	$465.6M	$646.1M	$561.1M
YoY Change	2.81%	46.18%	44.69%
INVESTING ACTIVITIES
Capital Expenditures	-$55.33M	-$61.20M	-$59.20M
YoY Change	32.36%	40.69%	70.11%
Acquisitions
YoY Change
Other Investing Activities	-$38.28M	-$115.4M	-$36.70M
YoY Change	-40.19%	-355.31%	-237.45%
Cash From Investing Activities	-$93.60M	-$176.6M	-$95.90M
YoY Change	-11.53%	-10488.24%	1083.95%
FINANCING ACTIVITIES
Cash Dividend Paid		$139.3M	$139.6M
YoY Change		4.5%	3.64%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-392.9M	-439.4M	-261.4M
YoY Change	540.92%	1.55%	-39.49%
NET CHANGE
Cash From Operating Activities	465.6M	646.1M	561.1M
Cash From Investing Activities	-93.60M	-176.6M	-95.90M
Cash From Financing Activities	-392.9M	-439.4M	-261.4M
Net Change In Cash	-20.86M	30.10M	203.8M
YoY Change	-107.3%	173.64%	-489.67%
FREE CASH FLOW
Cash From Operating Activities	$465.6M	$646.1M	$561.1M
Capital Expenditures	-$55.33M	-$61.20M	-$59.20M
Free Cash Flow	$521.0M	$707.3M	$620.3M
YoY Change	5.31%	45.68%	46.78%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000319201
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--06-30
CY2018	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountingStandardsUpdate201409Member
CY2020	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountingStandardsUpdate201409Member
CY2021Q2	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesCurrent
CY2020Q2	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesCurrent
CY2021Q2	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesNoncurrent
CY2020Q2	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesNoncurrent
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-06-30
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	000-09992
CY2021	dei	Entity Registrant Name EntityRegistrantName	KLA CORP
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	04-2564110
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	One Technology Drive,
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Milpitas,
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95035
CY2021	dei	City Area Code CityAreaCode	408
CY2021	dei	Local Phone Number LocalPhoneNumber	875-3000
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value per share
CY2021	dei	Trading Symbol TradingSymbol	KLAC
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2020Q4	dei	Entity Public Float EntityPublicFloat	39860000000	USD
CY2021Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	152737157	shares
CY2021	us-gaap	Restructuring Charges RestructuringCharges	12400000	USD
CY2021	us-gaap	Restructuring Reserve Accelerated Depreciation RestructuringReserveAcceleratedDepreciation	3900000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	7700000	USD
CY2021Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1434610000	USD
CY2020Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1234409000	USD
CY2021Q2	klac	Debt Securities Available For Sale And Equity Securities Fair Value DebtSecuritiesAvailableForSaleAndEquitySecuritiesFairValue	1059912000	USD
CY2020Q2	klac	Debt Securities Available For Sale And Equity Securities Fair Value DebtSecuritiesAvailableForSaleAndEquitySecuritiesFairValue	746063000	USD
CY2021Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1305479000	USD
CY2020Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1107413000	USD
CY2021Q2	us-gaap	Inventory Net InventoryNet	1575380000	USD
CY2020Q2	us-gaap	Inventory Net InventoryNet	1310985000	USD
CY2021Q2	us-gaap	Other Assets Current OtherAssetsCurrent	320867000	USD
CY2020Q2	us-gaap	Other Assets Current OtherAssetsCurrent	324675000	USD
CY2021Q2	us-gaap	Assets Current AssetsCurrent	5696248000	USD
CY2020Q2	us-gaap	Assets Current AssetsCurrent	4723545000	USD
CY2021Q2	klac	Contract With Customer Liability Current Service Revenue ContractWithCustomerLiabilityCurrentServiceRevenue	284936000	USD
CY2020Q2	klac	Contract With Customer Liability Current Service Revenue ContractWithCustomerLiabilityCurrentServiceRevenue	233493000	USD
CY2021Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	663027000	USD
CY2020Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	519824000	USD
CY2021Q2	us-gaap	Goodwill Goodwill	2011172000	USD
CY2020Q2	us-gaap	Goodwill Goodwill	2045402000	USD
CY2021Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	270461000	USD
CY2020Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	236797000	USD
CY2021Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1185311000	USD
CY2020Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1391413000	USD
CY2021Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	444905000	USD
CY2020Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	362979000	USD
CY2021Q2	us-gaap	Assets Assets	10271124000	USD
CY2020Q2	us-gaap	Assets Assets	9279960000	USD
CY2021Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	342083000	USD
CY2020Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	264280000	USD
CY2021Q2	klac	Contract With Customer Liability Current System Revenue ContractWithCustomerLiabilityCurrentSystemRevenue	295192000	USD
CY2020Q2	klac	Contract With Customer Liability Current System Revenue ContractWithCustomerLiabilityCurrentSystemRevenue	336237000	USD
CY2021Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	20000000	USD
CY2020Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	865776000	USD
CY2021Q2	us-gaap	Liabilities Current LiabilitiesCurrent	2103227000	USD
CY2020Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2021Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1161016000	USD
CY2020Q2	us-gaap	Liabilities Current LiabilitiesCurrent	1699786000	USD
CY2021Q2	us-gaap	Long Term Debt LongTermDebt	3422767000	USD
CY2020Q2	us-gaap	Long Term Debt LongTermDebt	3469670000	USD
CY2021Q2	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	650623000	USD
CY2020Q2	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	660885000	USD
CY2021Q2	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	87575000	USD
CY2020Q2	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	96325000	USD
CY2021Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	631290000	USD
CY2020Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	672284000	USD
CY2021Q2	us-gaap	Liabilities Liabilities	6895482000	USD
CY2020Q2	us-gaap	Liabilities Liabilities	6598950000	USD
CY2021Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2021Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2021Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2020Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2021Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2021Q2	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q2	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2021Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2021Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2021Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	278435000	shares
CY2020Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	277526000	shares
CY2021Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	152776000	shares
CY2020Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	155461000	shares
CY2021Q2	us-gaap	Common Stock Value CommonStockValue	153000	USD
CY2020Q2	us-gaap	Common Stock Value CommonStockValue	155000	USD
CY2021Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2175835000	USD
CY2020Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2090113000	USD
CY2021Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1277123000	USD
CY2020Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	654930000	USD
CY2021Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-75557000	USD
CY2020Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-79774000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	3377554000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	2665424000	USD
CY2021Q2	us-gaap	Minority Interest MinorityInterest	-1912000	USD
CY2020Q2	us-gaap	Minority Interest MinorityInterest	15586000	USD
CY2021Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3375642000	USD
CY2020Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2681010000	USD
CY2021Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	10271124000	USD
CY2020Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	9279960000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	6918734000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5806424000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4568904000	USD
CY2021	us-gaap	Cost Of Revenue CostOfRevenue	2772165000	USD
CY2020	us-gaap	Cost Of Revenue CostOfRevenue	2449561000	USD
CY2019	us-gaap	Cost Of Revenue CostOfRevenue	1869377000	USD
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	928487000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	863864000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	711030000	USD
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	729602000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	734149000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	599124000	USD
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	256649000	USD
CY2019	us-gaap	Interest Expense InterestExpense	124604000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2021	us-gaap	Interest Expense InterestExpense	157328000	USD
CY2020	us-gaap	Interest Expense InterestExpense	160274000	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22538000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	29302000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2678000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	31462000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2360454000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1316711000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1296231000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	283101000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	101686000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	121214000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	2077353000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1215025000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1175017000	USD
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-939000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1760000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-600000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2078292000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1216785000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1175617000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	13.49
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.76
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.53
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.37
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.70
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.49
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154086000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	156797000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	156053000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	155437000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	158005000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	156949000	shares
CY2021	us-gaap	Profit Loss ProfitLoss	2077353000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1215025000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1175017000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	12236000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-26000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-5190000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	842000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-110000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-117000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	11394000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	84000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-5073000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	3782000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-16739000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-9119000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-181000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	2072000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	4018000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	805000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-4286000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-2033000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	3158000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-14525000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-11104000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	7247000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-2397000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1824000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-3678000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	6029000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	11664000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	253000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	297000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-1294000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-843000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	433000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	3208000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-3088000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	5299000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	9750000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4217000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6745000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-8251000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-939000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-1760000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-600000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2082509000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1210040000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1167366000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1620511000	USD
CY2019	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1175617000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-600000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-8251000	USD
CY2019	klac	Stock Assumed During Period Value Acquisitions Share Based Payment Arrangement StockAssumedDuringPeriodValueAcquisitionsShareBasedPaymentArrangement	13281000	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	1330786000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	27321000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1103202000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.00
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	470009000	USD
CY2019	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	19185000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	94194000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2677693000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1216785000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1760000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6745000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	29374000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	821083000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.30
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	523396000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1239000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	111381000	USD
CY2020Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2681010000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2078292000	USD
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-939000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4217000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	29736000	USD
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	944607000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.60
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	561376000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	111836000	USD
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	127000	USD
CY2021	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	17124000	USD
CY2021Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3375642000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	2077353000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1215025000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1175017000	USD
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	256649000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	333335000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	348049000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	233224000	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22538000	USD
CY2021	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	26719000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	19441000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-13860000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-3830000	USD
CY2021	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	842000	USD
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	13341000	USD
CY2019	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	221000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	111836000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	111381000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	94194000	USD
CY2021	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-44445000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-93110000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-27511000	USD
CY2021	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	4422000	USD
CY2020	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2020	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
CY2021	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	0	USD
CY2020	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	21518000	USD
CY2019	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	0	USD
CY2021	klac	Increase Decrease In Accounts Receivable Excluding Acquisition Related IncreaseDecreaseInAccountsReceivableExcludingAcquisitionRelated	203155000	USD
CY2020	klac	Increase Decrease In Accounts Receivable Excluding Acquisition Related IncreaseDecreaseInAccountsReceivableExcludingAcquisitionRelated	118362000	USD
CY2019	klac	Increase Decrease In Accounts Receivable Excluding Acquisition Related IncreaseDecreaseInAccountsReceivableExcludingAcquisitionRelated	146151000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	270100000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	74817000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	59561000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	96218000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	11147000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	47123000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	79366000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	61144000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-21627000	USD
CY2021	klac	Increase Decrease In Contract With Customer Liability System Revenue IncreaseDecreaseInContractWithCustomerLiabilitySystemRevenue	-44674000	USD
CY2020	klac	Increase Decrease In Contract With Customer Liability System Revenue IncreaseDecreaseInContractWithCustomerLiabilitySystemRevenue	57687000	USD
CY2019	klac	Increase Decrease In Contract With Customer Liability System Revenue IncreaseDecreaseInContractWithCustomerLiabilitySystemRevenue	-15674000	USD
CY2021	klac	Increase Decrease In Contract With Customer Liability Service Revenue IncreaseDecreaseInContractWithCustomerLiabilityServiceRevenue	45845000	USD
CY2020	klac	Increase Decrease In Contract With Customer Liability Service Revenue IncreaseDecreaseInContractWithCustomerLiabilityServiceRevenue	22779000	USD
CY2019	klac	Increase Decrease In Contract With Customer Liability Service Revenue IncreaseDecreaseInContractWithCustomerLiabilityServiceRevenue	15064000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	245623000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-24649000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-51271000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2185026000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1778850000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1152632000	USD
CY2021	klac	Acquisition Of Non Marketable Securities AcquisitionOfNonMarketableSecurities	0	USD
CY2020	klac	Acquisition Of Non Marketable Securities AcquisitionOfNonMarketableSecurities	0	USD
CY2019	klac	Acquisition Of Non Marketable Securities AcquisitionOfNonMarketableSecurities	630000	USD
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	1855000	USD
CY2020	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2021	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	16833000	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	90143000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1818283000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	231628000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	152675000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	130498000	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1018744000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	798493000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	81533000	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	145533000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	148969000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	256395000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	581679000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	626943000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	589324000	USD
CY2021	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	107867000	USD
CY2020	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	110241000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	81022000	USD
CY2021	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	111321000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	115680000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	85265000	USD
CY2021	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	614000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	1086000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-500404000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-258874000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1180982000	USD
CY2021	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	40343000	USD
CY2020	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	741832000	USD
CY2019	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	1183785000	USD
CY2021	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2020	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	450000000	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	900000000	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	70000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1171033000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	902474000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	938607000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	829084000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1095202000	USD
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	559353000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	522421000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	472263000	USD
CY2021	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	0	USD
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	1239000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	0	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	86098000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	75634000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	64828000	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	56362000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	46260000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	37517000	USD
CY2021	klac	Contingent Consideration Payable And Other Net ContingentConsiderationPayableAndOtherNet	0	USD
CY2020	klac	Contingent Consideration Payable And Other Net ContingentConsiderationPayableAndOtherNet	2936000	USD
CY2019	klac	Contingent Consideration Payable And Other Net ContingentConsiderationPayableAndOtherNet	-1162000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1497881000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1299635000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-360005000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13460000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	15843000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1926000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-33000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	200201000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	218415000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-388388000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1234409000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1015994000	USD
CY2018Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1404382000	USD
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1434610000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1234409000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1015994000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	326002000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	204685000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	180470000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	154196000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	152651000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	107073000	USD
CY2021	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	1330786000	USD
CY2021	klac	Noncash Or Part Noncash Acquisition Contingent Consideration Payable Receivable NoncashOrPartNoncashAcquisitionContingentConsiderationPayableReceivable	-7448000	USD
CY2020	klac	Noncash Or Part Noncash Acquisition Contingent Consideration Payable Receivable NoncashOrPartNoncashAcquisitionContingentConsiderationPayableReceivable	5326000	USD
CY2019	klac	Noncash Or Part Noncash Acquisition Contingent Consideration Payable Receivable NoncashOrPartNoncashAcquisitionContingentConsiderationPayableReceivable	6905000	USD
CY2021	klac	Noncash Transaction Increase Decrease In Dividends Payable NoncashTransactionIncreaseDecreaseInDividendsPayable	6285000	USD
CY2020	klac	Noncash Transaction Increase Decrease In Dividends Payable NoncashTransactionIncreaseDecreaseInDividendsPayable	5978000	USD
CY2019	klac	Noncash Transaction Increase Decrease In Dividends Payable NoncashTransactionIncreaseDecreaseInDividendsPayable	7340000	USD
CY2021	klac	Noncash Or Part Noncash Acquisition Holdback Consideration Payable NoncashOrPartNoncashAcquisitionHoldbackConsiderationPayable	0	USD
CY2020	klac	Noncash Or Part Noncash Acquisition Holdback Consideration Payable NoncashOrPartNoncashAcquisitionHoldbackConsiderationPayable	0	USD
CY2019	klac	Noncash Or Part Noncash Acquisition Holdback Consideration Payable NoncashOrPartNoncashAcquisitionHoldbackConsiderationPayable	440000	USD
CY2021	klac	Stock Repurchase Program Unsettled Common Stock Repurchase StockRepurchaseProgramUnsettledCommonStockRepurchase	6000000	USD
CY2020	klac	Stock Repurchase Program Unsettled Common Stock Repurchase StockRepurchaseProgramUnsettledCommonStockRepurchase	0	USD
CY2019	klac	Stock Repurchase Program Unsettled Common Stock Repurchase StockRepurchaseProgramUnsettledCommonStockRepurchase	8000000	USD
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	30615000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	6353000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Management Estimates.</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions in applying our accounting policies that affect the reported amounts of assets and liabilities (and related disclosure of contingent assets and liabilities) at the date of the Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.</span>
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	0	USD
CY2021	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	0	USD
CY2021	us-gaap	Depreciation Depreciation	111100000	USD
CY2020	us-gaap	Depreciation Depreciation	101400000	USD
CY2019	us-gaap	Depreciation Depreciation	72600000	USD
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-top:9pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentration of Credit Risk.</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> Financial instruments that potentially subject us to significant concentrations of credit risk consist primarily of cash equivalents, short-term marketable securities, trade accounts receivable and derivative financial instruments used in hedging activities. We invest in a variety of financial instruments, such as, but not limited to, certificates of deposit, corporate debt and municipal securities, United States Treasury and Government agency securities, and equity securities and, by policy, we limit the amount of credit exposure with any one financial institution or commercial issuer. We have not experienced any material credit losses on our investments.</span></div><div style="margin-top:9pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A majority of our accounts receivable are derived from sales to large multinational semiconductor and electronics manufacturers located throughout the world, with a majority located in Asia. In recent years, our customer base has become increasingly concentrated due to corporate consolidations, acquisitions and business closures, and to the extent that these customers experience liquidity issues in the future, we may be required to reserve for potential credit losses with respect to trade receivables. We perform ongoing credit evaluations of our customers’ financial condition and generally require little to no collateral to secure accounts receivable. We maintain an allowance for potential credit losses based upon expected collectability risk of all accounts receivable. In addition, we may utilize letters of credit (“LC”), credit insurance or non-recourse factoring to mitigate credit risk when considered appropriate.</span></div><div style="margin-top:9pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are exposed to credit loss in the event of non-performance by counterparties on the foreign exchange contracts that we use in hedging activities and in certain factoring transactions. These counterparties are large international financial institutions, and to date no such counterparty has failed to meet its financial obligations to us under such contracts.</span></div>
CY2021	klac	Standard Warranty Coverage StandardWarrantyCoverage	P12M
CY2021	klac	Deferred Compensation Arrangement With Individual Optional Payout Period DeferredCompensationArrangementWithIndividualOptionalPayoutPeriod	P15Y
CY2021Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1305479000	USD
CY2020Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1107413000	USD
CY2019Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	990113000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	198066000	USD
CY2021	klac	Increase Decrease In Accounts Receivable Percentage IncreaseDecreaseInAccountsReceivablePercentage	0.18
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	117300000	USD
CY2020	klac	Increase Decrease In Accounts Receivable Percentage IncreaseDecreaseInAccountsReceivablePercentage	0.12
CY2021Q2	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	91052000	USD
CY2020Q2	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	99876000	USD
CY2019Q2	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	94015000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-8824000	USD
CY2021	klac	Increase Decrease In Contract With Customer Asset Percentage IncreaseDecreaseInContractWithCustomerAssetPercentage	-0.09
CY2020	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	5861000	USD
CY2020	klac	Increase Decrease In Contract With Customer Asset Percentage IncreaseDecreaseInContractWithCustomerAssetPercentage	0.06
CY2021Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	667703000	USD
CY2020Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	666055000	USD
CY2019Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	587789000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	1648000	USD
CY2021	klac	Increase Decrease In Contract With Customer Liability Percentage IncreaseDecreaseInContractWithCustomerLiabilityPercentage	0
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	78266000	USD
CY2020	klac	Increase Decrease In Contract With Customer Liability Percentage IncreaseDecreaseInContractWithCustomerLiabilityPercentage	0.13
CY2021	klac	Revenue Remainder Payable Acceptance Period RevenueRemainderPayableAcceptancePeriod	P30D
CY2021	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	77100000	USD
CY2021	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Modification Of Contract ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueModificationOfContract	68000000.0	USD
CY2021	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	526100000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	456000000.0	USD
CY2021Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	4690000000	USD
CY2021Q2	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2021Q2	us-gaap	Cash Cash	641600000	USD
CY2021Q2	klac	Time Deposit Fair Value TimeDepositFairValue	210600000	USD
CY2021Q2	klac	Time Deposits Cash Equivalents Fair Value TimeDepositsCashEquivalentsFairValue	101700000	USD
CY2020Q2	us-gaap	Cash Cash	460800000	USD
CY2020Q2	klac	Time Deposit Fair Value TimeDepositFairValue	124200000	USD
CY2020Q2	klac	Time Deposits Cash Equivalents Fair Value TimeDepositsCashEquivalentsFairValue	78700000	USD
CY2021Q2	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1323515000	USD
CY2020Q2	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1119235000	USD
CY2021Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	18036000	USD
CY2020Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	11822000	USD
CY2021Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1305479000	USD
CY2020Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1107413000	USD
CY2021Q2	us-gaap	Other Inventories Spare Parts OtherInventoriesSpareParts	349743000	USD
CY2020Q2	us-gaap	Other Inventories Spare Parts OtherInventoriesSpareParts	338608000	USD
CY2021Q2	us-gaap	Inventory Raw Materials InventoryRawMaterials	595151000	USD
CY2020Q2	us-gaap	Inventory Raw Materials InventoryRawMaterials	478594000	USD
CY2021Q2	us-gaap	Inventory Work In Process InventoryWorkInProcess	453432000	USD
CY2020Q2	us-gaap	Inventory Work In Process InventoryWorkInProcess	334965000	USD
CY2021Q2	us-gaap	Inventory Finished Goods InventoryFinishedGoods	177054000	USD
CY2020Q2	us-gaap	Inventory Finished Goods InventoryFinishedGoods	158818000	USD
CY2021Q2	us-gaap	Inventory Net InventoryNet	1575380000	USD
CY2020Q2	us-gaap	Inventory Net InventoryNet	1310985000	USD
CY2021Q2	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	91052000	USD
CY2020Q2	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	99876000	USD
CY2021Q2	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	59953000	USD
CY2020Q2	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	77219000	USD
CY2021Q2	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	76649000	USD
CY2020Q2	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	74955000	USD
CY2021Q2	us-gaap	Prepaid Taxes PrepaidTaxes	68847000	USD
CY2020Q2	us-gaap	Prepaid Taxes PrepaidTaxes	56809000	USD
CY2021Q2	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	24366000	USD
CY2020Q2	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	15816000	USD
CY2021Q2	us-gaap	Other Assets Current OtherAssetsCurrent	320867000	USD
CY2020Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	519824000	USD
CY2020Q2	us-gaap	Other Assets Current OtherAssetsCurrent	324675000	USD
CY2021Q2	us-gaap	Land Land	67862000	USD
CY2020Q2	us-gaap	Land Land	67858000	USD
CY2021Q2	klac	Buildings And Leasehold Improvements Gross BuildingsAndLeaseholdImprovementsGross	458605000	USD
CY2020Q2	klac	Buildings And Leasehold Improvements Gross BuildingsAndLeaseholdImprovementsGross	405238000	USD
CY2021Q2	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	743710000	USD
CY2020Q2	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	677627000	USD
CY2021Q2	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	32856000	USD
CY2020Q2	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	29964000	USD
CY2021Q2	us-gaap	Construction In Progress Gross ConstructionInProgressGross	182320000	USD
CY2020Q2	us-gaap	Construction In Progress Gross ConstructionInProgressGross	93736000	USD
CY2021Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1485353000	USD
CY2020Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1274423000	USD
CY2021Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	822326000	USD
CY2021Q2	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	266199000	USD
CY2020Q2	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	213487000	USD
CY2020Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	754599000	USD
CY2021Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	663027000	USD
CY2021Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	102883000	USD
CY2020Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	100790000	USD
CY2021Q2	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	75823000	USD
CY2020Q2	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	48702000	USD
CY2021Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	444905000	USD
CY2020Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	362979000	USD
CY2021Q2	us-gaap	Defined Benefit Pension Plan Liabilities Current DefinedBenefitPensionPlanLiabilitiesCurrent	268028000	USD
CY2020Q2	us-gaap	Defined Benefit Pension Plan Liabilities Current DefinedBenefitPensionPlanLiabilitiesCurrent	215167000	USD
CY2021Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	305445000	USD
CY2020Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	251379000	USD
CY2021Q2	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	180982000	USD
CY2020Q2	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	183435000	USD
CY2021Q2	us-gaap	Accrued Marketing Costs Current AccruedMarketingCostsCurrent	250784000	USD
CY2020Q2	us-gaap	Accrued Marketing Costs Current AccruedMarketingCostsCurrent	114896000	USD
CY2021Q2	us-gaap	Taxes Payable Current TaxesPayableCurrent	87320000	USD
CY2020Q2	us-gaap	Taxes Payable Current TaxesPayableCurrent	35640000	USD
CY2021Q2	us-gaap	Interest And Dividends Payable Current InterestAndDividendsPayableCurrent	36135000	USD
CY2020Q2	us-gaap	Interest And Dividends Payable Current InterestAndDividendsPayableCurrent	36265000	USD
CY2021Q2	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	32322000	USD
CY2020Q2	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	28994000	USD
CY2021Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1161016000	USD
CY2020Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	865776000	USD
CY2021Q2	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	87602000	USD
CY2020Q2	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	78911000	USD
CY2021Q2	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	333866000	USD
CY2020Q2	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	383447000	USD
CY2021Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	70739000	USD
CY2020Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	70885000	USD
CY2021Q2	klac	Other Liabilities Miscellaneous Noncurrent OtherLiabilitiesMiscellaneousNoncurrent	139083000	USD
CY2020Q2	klac	Other Liabilities Miscellaneous Noncurrent OtherLiabilitiesMiscellaneousNoncurrent	139041000	USD
CY2021Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	631290000	USD
CY2020Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	672284000	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	8929000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	21646000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	40367000	USD
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5005000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-4236000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	322000	USD
CY2021	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	253000	USD
CY2020	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	297000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-1294000	USD
CY2021	klac	Other Nonoperating Income Expense Miscellaneous OtherNonoperatingIncomeExpenseMiscellaneous	25125000	USD
CY2020	klac	Other Nonoperating Income Expense Miscellaneous OtherNonoperatingIncomeExpenseMiscellaneous	-20385000	USD
CY2019	klac	Other Nonoperating Income Expense Miscellaneous OtherNonoperatingIncomeExpenseMiscellaneous	-7933000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	29302000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2678000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	31462000	USD
CY2021Q2	klac	Money Market Funds And Other MoneyMarketFundsAndOther	691375000	USD
CY2021Q2	klac	Money Market Funds And Other MoneyMarketFundsAndOther	691375000	USD
CY2021Q2	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	3211000	USD
CY2021Q2	klac	Equity Securities Fvni Accumulated Gross Unrealized Gain EquitySecuritiesFVNIAccumulatedGrossUnrealizedGain	26719000	USD
CY2021Q2	klac	Equity Securities Fvni Accumulated Gross Unrealized Loss EquitySecuritiesFVNIAccumulatedGrossUnrealizedLoss	0	USD
CY2021Q2	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	29930000	USD
CY2021Q2	klac	Marketable Securities Excluding Time Deposits Amortized Cost MarketableSecuritiesExcludingTimeDepositsAmortizedCost	1614840000	USD
CY2021Q2	klac	Debt Securities Available For Sale And Equity Securities Accumulated Gross Unrealized Gain DebtSecuritiesAvailableForSaleAndEquitySecuritiesAccumulatedGrossUnrealizedGain	27810000	USD
CY2021Q2	klac	Debt Securities Available For Sale And Equity Securities Accumulated Gross Unrealized Loss DebtSecuritiesAvailableForSaleAndEquitySecuritiesAccumulatedGrossUnrealizedLoss	334000	USD
CY2021Q2	klac	Marketable Securities Excluding Time Deposits Fair Value MarketableSecuritiesExcludingTimeDepositsFairValue	1642316000	USD
CY2021Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	210636000	USD
CY2021Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	210636000	USD
CY2021Q2	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	793040000	USD
CY2021Q2	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	793040000	USD
CY2021Q2	klac	Debt Securities Available For Sale And Equity Securities Amortized Cost DebtSecuritiesAvailableForSaleAndEquitySecuritiesAmortizedCost	1032436000	USD
CY2021Q2	klac	Debt Securities Available For Sale And Equity Securities Accumulated Gross Unrealized Gain DebtSecuritiesAvailableForSaleAndEquitySecuritiesAccumulatedGrossUnrealizedGain	27810000	USD
CY2021Q2	klac	Debt Securities Available For Sale And Equity Securities Accumulated Gross Unrealized Loss DebtSecuritiesAvailableForSaleAndEquitySecuritiesAccumulatedGrossUnrealizedLoss	334000	USD
CY2021Q2	klac	Debt Securities Available For Sale And Equity Securities Fair Value DebtSecuritiesAvailableForSaleAndEquitySecuritiesFairValue	1059912000	USD
CY2020Q2	klac	Money Market Funds And Other MoneyMarketFundsAndOther	694950000	USD
CY2020Q2	klac	Money Market Funds And Other MoneyMarketFundsAndOther	694950000	USD
CY2020Q2	klac	Marketable Securities Excluding Time Deposits Amortized Cost MarketableSecuritiesExcludingTimeDepositsAmortizedCost	1390874000	USD
CY2020Q2	klac	Debt Securities Available For Sale And Equity Securities Accumulated Gross Unrealized Gain DebtSecuritiesAvailableForSaleAndEquitySecuritiesAccumulatedGrossUnrealizedGain	4748000	USD
CY2020Q2	klac	Debt Securities Available For Sale And Equity Securities Accumulated Gross Unrealized Loss DebtSecuritiesAvailableForSaleAndEquitySecuritiesAccumulatedGrossUnrealizedLoss	59000	USD
CY2020Q2	klac	Marketable Securities Excluding Time Deposits Fair Value MarketableSecuritiesExcludingTimeDepositsFairValue	1395563000	USD
CY2020Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	124153000	USD
CY2020Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	124153000	USD
CY2020Q2	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	773653000	USD
CY2020Q2	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	773653000	USD
CY2020Q2	klac	Debt Securities Available For Sale And Equity Securities Amortized Cost DebtSecuritiesAvailableForSaleAndEquitySecuritiesAmortizedCost	741374000	USD
CY2020Q2	klac	Debt Securities Available For Sale And Equity Securities Accumulated Gross Unrealized Gain DebtSecuritiesAvailableForSaleAndEquitySecuritiesAccumulatedGrossUnrealizedGain	4748000	USD
CY2020Q2	klac	Debt Securities Available For Sale And Equity Securities Accumulated Gross Unrealized Loss DebtSecuritiesAvailableForSaleAndEquitySecuritiesAccumulatedGrossUnrealizedLoss	59000	USD
CY2020Q2	klac	Debt Securities Available For Sale And Equity Securities Fair Value DebtSecuritiesAvailableForSaleAndEquitySecuritiesFairValue	746063000	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	208	investment
CY2021Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	339282000	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	334000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	519815000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	547291000	USD
CY2021Q2	klac	Debt Securities Availableforsale Maturity Allocatedand Single Maturity Dateafter One Through Three Years Amortized Cost DebtSecuritiesAvailableforsaleMaturityAllocatedandSingleMaturityDateafterOneThroughThreeYearsAmortizedCost	512621000	USD
CY2021Q2	klac	Debt Securities Availableforsale Maturity Allocatedand Single Maturity Dateafter One Through Three Years Fair Value DebtSecuritiesAvailableforsaleMaturityAllocatedandSingleMaturityDateafterOneThroughThreeYearsFairValue	512621000	USD
CY2021Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1032436000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1059912000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	1400000	USD
CY2019	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	5	numberOfCompany
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	40200000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	reporting_Unit
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	6	segment
CY2019Q2	us-gaap	Goodwill Goodwill	2211858000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	56180000	USD
CY2020	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	34134000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	256649000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-121000	USD
CY2020Q2	us-gaap	Goodwill Goodwill	2045402000	USD
CY2021	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	34250000	USD
CY2021	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	20000	USD
CY2021Q2	us-gaap	Goodwill Goodwill	2011172000	USD
CY2021Q2	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	534200000	USD
CY2020Q2	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	534200000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1856215000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	734060000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1122155000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1743487000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	527808000	USD
CY2020Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1215679000	USD
CY2021Q2	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	1919471000	USD
CY2021Q2	klac	Finite Lived Intangible Assets Accumulated Amortization And Other Accumulated Adjustment FiniteLivedIntangibleAssetsAccumulatedAmortizationAndOtherAccumulatedAdjustment	734160000	USD
CY2021Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1185311000	USD
CY2020Q2	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	1919321000	USD
CY2020Q2	klac	Finite Lived Intangible Assets Accumulated Amortization And Other Accumulated Adjustment FiniteLivedIntangibleAssetsAccumulatedAmortizationAndOtherAccumulatedAdjustment	527908000	USD
CY2020Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1391413000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	206252000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	220579000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	87392000	USD
CY2020Q2	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	22163000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	209349000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	208257000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	205740000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	193521000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	178346000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	126942000	USD
CY2021Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1122155000	USD
CY2021Q2	klac	Debt Long Term And Short Term Combined Amount Gross DebtLongTermAndShortTermCombinedAmountGross	3470000000	USD
CY2020Q2	klac	Debt Long Term And Short Term Combined Amount Gross DebtLongTermAndShortTermCombinedAmountGross	3500000000	USD
CY2021Q2	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	7168000	USD
CY2020Q2	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	8167000	USD
CY2021Q2	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	20065000	USD
CY2021Q2	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	3442767000	USD
CY2020Q2	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	3469670000	USD
CY2021Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	20000000	USD
CY2020Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2021Q2	us-gaap	Long Term Debt LongTermDebt	3422767000	USD
CY2020Q2	us-gaap	Long Term Debt LongTermDebt	3469670000	USD
CY2021Q2	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	3442767000	USD
CY2020Q2	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	3469670000	USD
CY2021Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	20000000.0	USD
CY2021Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1250000000	USD
CY2021Q2	klac	Long Term Debt Maturities Repayments Of Principal After Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour	2200000000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22500000	USD
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	38900000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	35100000	USD
CY2021Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y7M6D
CY2020Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y1M6D
CY2021Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0164
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	107557000	USD
CY2020Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0199
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	38118000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	34702000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	39292000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	24549000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	33759000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	24326000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	15501000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	12104000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	9168000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	12699000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	4496000	USD
CY2021Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	103061000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	13500000	USD
CY2018Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	3680000	shares
CY2019	klac	Sharebased Compensation Arrangementby Sharebased Payment Award Increase Decreasein Numberof Shares Availablefor Grant SharebasedCompensationArrangementbySharebasedPaymentAwardIncreaseDecreaseinNumberofSharesAvailableforGrant	12000000	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	2463000	shares
CY2019	klac	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Adjustment ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAdjustment	5000	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	51000	shares
CY2019	klac	Sharebased Compensation Arrangementby Sharebased Payment Award Options Grants Forfeituresand Expirationsin Period SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsGrantsForfeituresandExpirationsinPeriod	1660000	shares
CY2019Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	11613000	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1174000	shares
CY2020	klac	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Adjustment ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAdjustment	103000	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	218000	shares
CY2020Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	10760000	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	761000	shares
CY2021	klac	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Adjustment ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAdjustment	102000	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	152000	shares
CY2021Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	10253000	shares
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	111836000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	111381000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	94194000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Accelerated Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost	10900000	USD
CY2021Q2	klac	Stock Based Compensation Capitalized As Inventory StockBasedCompensationCapitalizedAsInventory	8000000.0	USD
CY2020Q2	klac	Stock Based Compensation Capitalized As Inventory StockBasedCompensationCapitalizedAsInventory	6800000	USD
CY2021Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Outstanding SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding	554400000	USD
CY2021	klac	Employee Stock Purchase Plan Offering Period EmployeeStockPurchasePlanOfferingPeriod	P6M
CY2021	klac	Employee Stock Purchase Plan Offering Period EmployeeStockPurchasePlanOfferingPeriod	P6M
CY2021Q2	klac	Espp Maximum Annual Share Replenishment ESPPMaximumAnnualShareReplenishment	2000000.0	shares
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.90
CY2019Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	3000000000.00	USD
CY2019Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1000000000.00	USD
CY2021Q2	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	93000000	USD
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	944607000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	821083000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1103202000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2078292000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1216785000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1175617000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	154086000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	156797000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	156053000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1351000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1208000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	896000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	155437000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	158005000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	156949000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	13.49
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.76
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.53
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.37
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.70
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.49
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	22000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	227000	shares
	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.50
	klac	Defined Contribution Plan Employer Matching Contribution Employees Contribution Matched DefinedContributionPlanEmployerMatchingContributionEmployeesContributionMatched	8000	USD
	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Amount DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount	4000	USD
CY2021	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	27000000.0	USD
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	24600000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	18600000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	119870000	USD
CY2019Q2	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	115490000	USD
CY2021	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	4649000	USD
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	4823000	USD
CY2021	klac	Defined Benefit Plan Benefit Obligation Interest Cost DefinedBenefitPlanBenefitObligationInterestCost	1187000	USD
CY2020	klac	Defined Benefit Plan Benefit Obligation Interest Cost DefinedBenefitPlanBenefitObligationInterestCost	1084000	USD
CY2021	us-gaap	Defined Benefit Plan Benefit Obligation Contributions By Plan Participant DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant	72000	USD
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Contributions By Plan Participant DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant	78000	USD
CY2021	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-7912000	USD
CY2020	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	953000	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	496000	USD
CY2021	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	2629000	USD
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	3119000	USD
CY2021	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-3244000	USD
CY2020	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-2010000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	134305000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	119870000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	37928000	USD
CY2019Q2	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	33555000	USD
CY2021	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	1074000	USD
CY2020	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	1264000	USD
CY2021	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	6103000	USD
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	5271000	USD
CY2021	klac	Defined Benefit Plan Benefits And Expenses Paid DefinedBenefitPlanBenefitsAndExpensesPaid	2626000	USD
CY2020	klac	Defined Benefit Plan Benefits And Expenses Paid DefinedBenefitPlanBenefitsAndExpensesPaid	3115000	USD
CY2021	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	2247000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	44726000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	37928000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-89579000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-81942000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	81924000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	75550000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	134305000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	119870000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	44726000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	37928000	USD
CY2021	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateMinimum	0.005
CY2021	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateMaximum	0.017
CY2020	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateMinimum	0.006
CY2020	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateMaximum	0.017
CY2019	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateMinimum	0.003
CY2019	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateMaximum	0.017
CY2021	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsMinimum	0.006
CY2021	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsMaximum	0.029
CY2020	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsMinimum	0.008
CY2020	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsMaximum	0.029
CY2019	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsMinimum	0.010
CY2019	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsMaximum	0.029
CY2021	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum	0.023
CY2021	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum	0.050
CY2020	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum	0.018
CY2020	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum	0.045
CY2019	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum	0.018
CY2019	klac	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum	0.045
CY2021Q2	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsBeforeTax	0	USD
CY2020Q2	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsBeforeTax	-310000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	-30375000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	-23157000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	30375000	USD
CY2020Q2	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	23467000	USD
CY2021	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	4649000	USD
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	4823000	USD
CY2019	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	4220000	USD
CY2021	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1187000	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1086000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1132000	USD
CY2021	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	549000	USD
CY2020	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	475000	USD
CY2019	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	476000	USD
CY2021	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	0	USD
CY2020	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	3000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	21000	USD
CY2021	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-1071000	USD
CY2020	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-1214000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-1047000	USD
CY2021	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	-130000	USD
CY2020	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	0	USD
CY2019	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	0	USD
CY2021	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	6488000	USD
CY2020	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	6651000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	5944000	USD
CY2021Q2	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1
CY2020Q2	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1
CY2021Q2	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	4700000	USD
CY2021Q2	klac	Defined Benefit Plan Maximum Yearly Expected Future Benefit Payments DefinedBenefitPlanMaximumYearlyExpectedFutureBenefitPayments	6400000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1251820000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	752844000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	545401000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1108634000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	563867000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	750830000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2360454000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1316711000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1296231000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	201413000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	108136000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	82460000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6164000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	518000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5665000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	121146000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	86374000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	59274000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	328723000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	195028000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	147399000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-31989000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-26743000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	473168000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1636000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1155000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1174000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2118000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-12478000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-65425000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-29939000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-45622000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-93342000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-26185000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	283101000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	101686000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	121214000	USD
CY2021Q2	klac	Deferred Tax Assets Tax Credits And Net Operating Losses DeferredTaxAssetsTaxCreditsAndNetOperatingLosses	237480000	USD
CY2020Q2	klac	Deferred Tax Assets Tax Credits And Net Operating Losses DeferredTaxAssetsTaxCreditsAndNetOperatingLosses	214305000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	82055000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	67729000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	7284000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	8871000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	81224000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	73939000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	36267000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	20526000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	15712000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	15786000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	5384000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	5345000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	54615000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	66667000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	520021000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	204433000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	181846000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	315588000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	291322000	USD
CY2021Q2	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	278014000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	257757000	USD
CY2021Q2	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	10044000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	18111000	USD
CY2021Q2	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	407692000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	439685000	USD
CY2021Q2	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	695750000	USD
CY2020Q2	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	715553000	USD
CY2021Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	380162000	USD
CY2020Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	424231000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	271100000	USD
CY2021Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	204400000	USD
CY2021Q2	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries	108000000	USD
CY2020Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	181800000	USD
CY2021Q2	klac	Undistributed Earnings For Certain Foreign Subsidiaries UndistributedEarningsForCertainForeignSubsidiaries	3250000000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.002
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.002
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.005
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.066
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.121
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.105
CY2021	klac	Effective Income Tax Rate Reconciliation Tax Rate Change On Deferred Tax Liability On Purchased Intangibles Percent EffectiveIncomeTaxRateReconciliationTaxRateChangeOnDeferredTaxLiabilityOnPurchasedIntangiblesPercent	0.017
CY2020	klac	Effective Income Tax Rate Reconciliation Tax Rate Change On Deferred Tax Liability On Purchased Intangibles Percent EffectiveIncomeTaxRateReconciliationTaxRateChangeOnDeferredTaxLiabilityOnPurchasedIntangiblesPercent	0
CY2019	klac	Effective Income Tax Rate Reconciliation Tax Rate Change On Deferred Tax Liability On Purchased Intangibles Percent EffectiveIncomeTaxRateReconciliationTaxRateChangeOnDeferredTaxLiabilityOnPurchasedIntangiblesPercent	0
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	-0.015
CY2021	klac	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent	0.026
CY2020	klac	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent	0.030
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2019	klac	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent	0.035
CY2021	klac	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent	-0.043
CY2020	klac	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent	-0.050
CY2019	klac	Effective Income Tax Rate Reconciliation Foreign Derived Intangible Income Percent EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent	-0.040
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.011
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.018
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.018
CY2021	klac	Effective Income Tax Rate Reconciliation Net Change In Tax Reserves Percent EffectiveIncomeTaxRateReconciliationNetChangeInTaxReservesPercent	-0.011
CY2020	klac	Effective Income Tax Rate Reconciliation Net Change In Tax Reserves Percent EffectiveIncomeTaxRateReconciliationNetChangeInTaxReservesPercent	0.015
CY2019	klac	Effective Income Tax Rate Reconciliation Net Change In Tax Reserves Percent EffectiveIncomeTaxRateReconciliationNetChangeInTaxReservesPercent	0.014
CY2021	klac	Effective Income Tax Rate Reconciliation Nondeductible Impairment Of Goodwill Percent EffectiveIncomeTaxRateReconciliationNondeductibleImpairmentOfGoodwillPercent	0
CY2020	klac	Effective Income Tax Rate Reconciliation Nondeductible Impairment Of Goodwill Percent EffectiveIncomeTaxRateReconciliationNondeductibleImpairmentOfGoodwillPercent	0.041
CY2019	klac	Effective Income Tax Rate Reconciliation Nondeductible Impairment Of Goodwill Percent EffectiveIncomeTaxRateReconciliationNondeductibleImpairmentOfGoodwillPercent	0
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.003
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.003
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.004
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.120
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.077
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	-0.026
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.094
CY2020Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	172443000	USD
CY2019Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	146426000	USD
CY2018Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	63994000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	60753000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	6557000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	6826000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	13001000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	19360000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	518000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1304000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	2900000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	31113000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	34278000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	26178000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	28651000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	12460000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	14569000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	16196000	USD
CY2021Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	149642000	USD
CY2020Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	172443000	USD
CY2019Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	146426000	USD
CY2021Q2	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	137800000	USD
CY2020Q2	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	161500000	USD
CY2019Q2	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	136100000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	2800000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	4600000	USD
CY2021Q2	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	42000000	USD
CY2020Q2	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	38000000	USD
CY2021Q2	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	2200000	USD
CY2021	klac	Receivables Sold Under Factoring Agreements ReceivablesSoldUnderFactoringAgreements	305565000	USD
CY2020	klac	Receivables Sold Under Factoring Agreements ReceivablesSoldUnderFactoringAgreements	293006000	USD
CY2019	klac	Receivables Sold Under Factoring Agreements ReceivablesSoldUnderFactoringAgreements	193089000	USD
CY2021	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	133679000	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	59036000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	95436000	USD
CY2021Q2	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	2000000000	USD
CY2021	klac	Outstanding Inventory Purchase Commitment OutstandingInventoryPurchaseCommitment	P12M
CY2021Q2	klac	Long Term Incentive Plan Committed Amount LongTermIncentivePlanCommittedAmount	248000000.0	USD
CY2021	klac	Guarantee Arrangements To Fund Customs Guarantees For Vat And Lc1 GuaranteeArrangementsToFundCustomsGuaranteesForVatAndLc1	75200000	USD
CY2021	klac	Outstanding Guarantee Arrangements To Fund Customs Guarantees For Vat And Lc OutstandingGuaranteeArrangementsToFundCustomsGuaranteesForVatAndLc	59700000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Investment Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax	-191000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Investment Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Investment Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax	0	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4568904000	USD
CY2019	klac	Cost Of Revenue And Operating Expense CostOfRevenueAndOperatingExpense	3179531000	USD
CY2019	us-gaap	Interest Expense InterestExpense	124604000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	31462000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5806424000	USD
CY2020	klac	Cost Of Revenue And Operating Expense CostOfRevenueAndOperatingExpense	4304223000	USD
CY2020	us-gaap	Interest Expense InterestExpense	160274000	USD
CY2019	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	2402000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2678000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	6918734000	USD
CY2021	klac	Cost Of Revenue And Operating Expense CostOfRevenueAndOperatingExpense	4430254000	USD
CY2021	us-gaap	Interest Expense InterestExpense	157328000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	29302000	USD
CY2021	us-gaap	Derivative Remaining Maturity1 DerivativeRemainingMaturity1	P10M
CY2020	us-gaap	Derivative Remaining Maturity1 DerivativeRemainingMaturity1	P7M
CY2021Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	8252000	USD
CY2021Q2	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2021Q2	us-gaap	Derivative Assets DerivativeAssets	8252000	USD
CY2021Q2	us-gaap	Derivative Asset Not Offset Policy Election Deduction DerivativeAssetNotOffsetPolicyElectionDeduction	2492000	USD
CY2021Q2	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	USD
CY2021Q2	us-gaap	Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	5760000	USD
CY2021Q2	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	2807000	USD
CY2021Q2	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	0	USD
CY2021Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	2807000	USD
CY2021Q2	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	2492000	USD
CY2021Q2	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2021Q2	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	315000	USD
CY2020Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	2077000	USD
CY2020Q2	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2020Q2	us-gaap	Derivative Assets DerivativeAssets	2077000	USD
CY2020Q2	us-gaap	Derivative Asset Not Offset Policy Election Deduction DerivativeAssetNotOffsetPolicyElectionDeduction	1020000	USD
CY2020Q2	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	USD
CY2020Q2	us-gaap	Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	1057000	USD
CY2020Q2	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	1410000	USD
CY2020Q2	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	0	USD
CY2020Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	1410000	USD
CY2020Q2	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	1020000	USD
CY2020Q2	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2020Q2	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	390000	USD
CY2021	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1276000	USD
CY2020	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	4237000	USD
CY2021	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	1347000	USD
CY2020	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	2414000	USD
CY2019	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	2881000	USD
CY2021Q2	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	1100000	USD
CY2020Q2	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	2400000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	6918734000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5806424000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4568904000	USD
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	928487000	USD
CY2020Q2	us-gaap	Noncurrent Assets NoncurrentAssets	519824000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	863864000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	711030000	USD
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	729602000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	734149000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	599124000	USD
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	256649000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2021	us-gaap	Interest Expense InterestExpense	157328000	USD
CY2020	us-gaap	Interest Expense InterestExpense	160274000	USD
CY2019	us-gaap	Interest Expense InterestExpense	124604000	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22538000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	29302000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2678000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	31462000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2360454000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1316711000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1296231000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	6918734000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5806424000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4568904000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	6918734000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5806424000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4568904000	USD
CY2021Q2	us-gaap	Noncurrent Assets NoncurrentAssets	663027000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	12400000	USD
CY2021	us-gaap	Restructuring Reserve Accelerated Depreciation RestructuringReserveAcceleratedDepreciation	3900000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	7700000	USD
CY2021Q2	us-gaap	Restructuring Reserve RestructuringReserve	3300000	USD
CY2020Q2	us-gaap	Restructuring Reserve RestructuringReserve	5700000	USD
CY2021Q2	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	93000000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1538620000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1650870000	USD
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1803773000	USD
CY2021Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1925471000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	918058000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	981137000	USD
CY2021Q1	us-gaap	Gross Profit GrossProfit	1094144000	USD
CY2021Q2	us-gaap	Gross Profit GrossProfit	1153230000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	420567000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	457251000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	567496000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	632978000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.71
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.96
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.69
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.14
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.69
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.94
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.66
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.10
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1413414000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1509453000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1423964000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1459593000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	809173000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	875835000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	833806000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	838049000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	346525000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	380555000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	78452000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	411253000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.18
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.42
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.50
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.65
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.16
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.40
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.50
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.63

Files In Submission

Name	View Source	Status
0000319201-21-000029-index-headers.html	Edgar Link	pending
0000319201-21-000029-index.html	Edgar Link	pending
0000319201-21-000029.txt	Edgar Link	pending
0000319201-21-000029-xbrl.zip	Edgar Link	pending
exhibit10206302021.htm	Edgar Link	pending
exhibit10306302021.htm	Edgar Link	pending
exhibit21106302021.htm	Edgar Link	pending
exhibit23106302021.htm	Edgar Link	pending
exhibit31106302021.htm	Edgar Link	pending
exhibit31206302021.htm	Edgar Link	pending
exhibit3206302021.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
klac-20210630.htm	Edgar Link	pending
klac-20210630.xsd	Edgar Link	pending
klac-20210630_cal.xml	Edgar Link	unprocessable
klac-20210630_def.xml	Edgar Link	unprocessable
klac-20210630_g1.jpg	Edgar Link	pending
klac-20210630_htm.xml	Edgar Link	completed
klac-20210630_lab.xml	Edgar Link	unprocessable
klac-20210630_pre.xml	Edgar Link	unprocessable
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R104.htm	Edgar Link	pending
R105.htm	Edgar Link	pending
R106.htm	Edgar Link	pending
R107.htm	Edgar Link	pending
R108.htm	Edgar Link	pending
R109.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R110.htm	Edgar Link	pending
R111.htm	Edgar Link	pending
R112.htm	Edgar Link	pending
R113.htm	Edgar Link	pending
R114.htm	Edgar Link	pending
R115.htm	Edgar Link	pending
R116.htm	Edgar Link	pending
R117.htm	Edgar Link	pending
R118.htm	Edgar Link	pending
R119.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R120.htm	Edgar Link	pending
R121.htm	Edgar Link	pending
R122.htm	Edgar Link	pending
R123.htm	Edgar Link	pending
R124.htm	Edgar Link	pending
R125.htm	Edgar Link	pending
R126.htm	Edgar Link	pending
R127.htm	Edgar Link	pending
R128.htm	Edgar Link	pending
R129.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R130.htm	Edgar Link	pending
R131.htm	Edgar Link	pending
R132.htm	Edgar Link	pending
R133.htm	Edgar Link	pending
R134.htm	Edgar Link	pending
R135.htm	Edgar Link	pending
R136.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
R9999.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$KLAC
KLA CORP Stock $klac

2021 Q2 Form 10-K Financial Statement

#000031920121000029 Filed on August 06, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KLAC KLA CORP Stock $klac

2021 Q2 Form 10-K Financial Statement

#000031920121000029 Filed on August 06, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KLAC
KLA CORP Stock $klac