$MCHP
Microchip Technology Inc Stock $mchp

$mchp Overview Financials Valuation SEC Filings Company Website

2021 Form 10-K Financial Statement

#000082705421000106 Filed on May 18, 2021

Income Statement

Concept	2021	2020 Q1	2020
Revenue	$5.438B	$1.326B	$5.274B
YoY Change	3.11%	-0.26%	-1.41%
Cost Of Revenue	$2.060B	$512.5M	$2.032B
YoY Change	1.35%	0.61%	-15.97%
Gross Profit	$3.379B	$813.9M	$3.242B
YoY Change	4.22%	-0.8%	10.6%
Gross Profit Margin	62.13%	61.36%	61.47%
Selling, General & Admin	$610.3M	$165.7M	$676.6M
YoY Change	-9.8%	-1.02%	-0.92%
% of Gross Profit	18.06%	20.36%	20.87%
Research & Development	$836.4M	$221.8M	$877.8M
YoY Change	-4.72%	3.31%	6.23%
% of Gross Profit	24.75%	27.25%	27.08%
Depreciation & Amortization	$1.153B	$310.9M	$1.216B
YoY Change	-5.13%	30.25%	38.7%
% of Gross Profit	34.13%	38.2%	37.49%
Operating Expenses	$2.381B	$636.0M	$2.595B
YoY Change	-8.26%	13.77%	17.05%
Operating Profit	$998.1M	$160.7M	$647.1M
YoY Change	54.24%	-43.53%	-9.41%
Interest Expense	$356.9M	-$114.9M	$497.3M
YoY Change	-28.23%	-15.14%	-1.11%
% of Operating Profit	35.76%	-71.5%	76.85%
Other Income/Expense, Net	-$3.800M	$3.400M	$3.200M
YoY Change	-218.75%	-66.67%	-245.45%
Pretax Income	$339.5M	$45.80M	$150.4M
YoY Change	125.73%	-69.71%	-26.45%
Income Tax	-$9.900M	-$54.10M	-$420.2M
% Of Pretax Income	-2.92%	-118.12%	-279.39%
Net Earnings	$349.4M	$99.90M	$570.6M
YoY Change	-38.77%	-42.82%	60.33%
Net Earnings / Revenue	6.42%	7.53%	10.82%
Basic Earnings Per Share	$0.67		$1.19
Diluted Earnings Per Share	$0.65	$0.39	$1.11
COMMON SHARES
Basic Shares Outstanding	519.2M shares	239.5M shares	477.7M shares
Diluted Shares Outstanding	541.2M shares		512.4M shares

Balance Sheet

Concept	2021	2020 Q1	2020
SHORT-TERM ASSETS
Cash & Short-Term Investments	$282.0M	$403.0M	$403.0M
YoY Change	-30.02%	-6.5%	-6.5%
Cash & Equivalents	$280.0M	$401.0M	$401.0M
Short-Term Investments	$2.000M	$2.000M	$2.000M
Other Short-Term Assets	$201.0M	$194.5M	$195.0M
YoY Change	3.08%	1.51%	1.56%
Inventory	$665.0M	$685.7M	$686.0M
Prepaid Expenses
Receivables	$986.0M	$934.0M	$919.0M
Other Receivables	$12.00M	$15.00M	$15.00M
Total Short-Term Assets	$2.145B	$2.217B	$2.217B
YoY Change	-3.25%	0.11%	0.09%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.009B	$876.1M	$996.0M
YoY Change	1.31%	-12.1%	-0.1%
Goodwill		$6.665B
YoY Change		0.01%
Intangibles		$5.702B
YoY Change		-14.71%
Long-Term Investments
YoY Change
Other Assets	$1.859B	$217.2M	$1.846B
YoY Change	0.7%	94.28%	3.19%
Total Long-Term Assets	$14.33B	$15.21B	$15.21B
YoY Change	-5.75%	-5.74%	-5.74%
TOTAL ASSETS
Total Short-Term Assets	$2.145B	$2.217B	$2.217B
Total Long-Term Assets	$14.33B	$15.21B	$15.21B
Total Assets	$16.48B	$17.43B	$17.43B
YoY Change	-5.43%	-5.03%	-5.04%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$292.0M	$246.8M	$247.0M
YoY Change	18.22%	9.01%	9.29%
Accrued Expenses	$751.0M	$781.8M	$744.0M
YoY Change	0.94%	-0.7%	-5.46%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$1.323B	$608.8M	$609.0M
YoY Change	117.24%	-55.26%	-55.25%
Total Short-Term Liabilities	$2.410B	$1.637B	$1.637B
YoY Change	47.22%	-31.04%	-31.07%
LONG-TERM LIABILITIES
Long-Term Debt	$7.581B	$8.873B	$8.873B
YoY Change	-14.56%	-0.81%	-0.82%
Other Long-Term Liabilities	$1.107B	$342.9M	$1.011B
YoY Change	9.5%	22.68%	-2.41%
Total Long-Term Liabilities	$8.688B	$9.216B	$9.884B
YoY Change	-12.1%	-0.1%	-0.98%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.410B	$1.637B	$1.637B
Total Long-Term Liabilities	$8.688B	$9.216B	$9.884B
Total Liabilities	$11.14B	$10.85B	$11.84B
YoY Change	-5.9%	-6.44%	-9.35%
SHAREHOLDERS EQUITY
Retained Earnings		$3.432B
YoY Change		6.91%
Common Stock		$2.675B
YoY Change		-0.17%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$500.6M
YoY Change		-14.02%
Treasury Stock Shares		13.07M shares
Shareholders Equity	$5.337B	$5.586B	$5.586B
YoY Change
Total Liabilities & Shareholders Equity	$16.48B	$17.43B	$17.43B
YoY Change	-5.43%	-5.03%	-5.04%

Cashflow Statement

Concept	2021	2020 Q1	2020
OPERATING ACTIVITIES
Net Income	$349.4M	$99.90M	$570.6M
YoY Change	-38.77%	-42.82%	60.33%
Depreciation, Depletion And Amortization	$1.153B	$310.9M	$1.216B
YoY Change	-5.13%	30.25%	38.7%
Cash From Operating Activities	$1.917B	$371.7M	$1.544B
YoY Change	24.14%	-7.86%	-7.82%
INVESTING ACTIVITIES
Capital Expenditures	$92.60M	-$11.90M	$67.60M
YoY Change	36.98%	-70.32%	-70.47%
Acquisitions	$0.00		$0.00
YoY Change			-100.0%
Other Investing Activities	-$80.70M	-$23.60M	-$65.60M
YoY Change	23.02%	574.29%	-99.0%
Cash From Investing Activities	-$173.3M	-$35.50M	-$133.2M
YoY Change	30.11%	-18.58%	-98.04%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	-$60.30M		-$58.80M
YoY Change	2.55%		-238.03%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$1.864B	-332.3M	-$1.438B
YoY Change	29.62%	-8.56%	-130.84%
NET CHANGE
Cash From Operating Activities	$1.917B	371.7M	$1.544B
Cash From Investing Activities	-$173.3M	-35.50M	-$133.2M
Cash From Financing Activities	-$1.864B	-332.3M	-$1.438B
Net Change In Cash	-$121.0M	3.900M	-$27.60M
YoY Change	338.41%	-208.33%	-94.16%
FREE CASH FLOW
Cash From Operating Activities	$1.917B	$371.7M	$1.544B
Capital Expenditures	$92.60M	-$11.90M	$67.60M
Free Cash Flow	$1.824B	$383.6M	$1.476B
YoY Change	23.55%	-13.51%	2.1%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021Q1	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssets
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CY2020Q1	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
CY2020Q1	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OperatingLeaseLiabilityNoncurrent
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OperatingLeaseLiabilityNoncurrent
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000827054
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-03-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--03-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	0-21184
CY2021	dei	Entity Registrant Name EntityRegistrantName	MICROCHIP TECHNOLOGY INCORPORATED
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	86-0629024
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	AZ
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	2355 W. Chandler Blvd.
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Chandler
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	85224-6199
CY2021	dei	City Area Code CityAreaCode	480
CY2021	dei	Local Phone Number LocalPhoneNumber	792-7200
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.001 Par Value Per Share
CY2021	dei	Trading Symbol TradingSymbol	MCHP
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
CY2020Q3	dei	Entity Public Float EntityPublicFloat	26200000000	USD
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CY2021Q1	us-gaap	Short Term Investments ShortTermInvestments	2000000.0	USD
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CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	836400000	USD
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CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.457
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.457
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	259600000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	238900000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	236200000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	236200000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	270600000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	256200000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	249900000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	249900000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	349400000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	570600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	355900000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-5600000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-5600000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	9400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	-1400000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	-2900000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	1100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	1000000.0	USD
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	3700000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1800000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-5300000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	400000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1400000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	344800000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	571000000.0	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	354500000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	349400000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	570600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	355900000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1153300000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1215600000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	876400000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-138900000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-490300000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-62200000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	198300000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	170200000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	166400000	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-299600000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5400000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-12600000	USD
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	71100000	USD
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	121700000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	114600000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	17100000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	17100000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	16500000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-200000	USD
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	7100000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2200000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
CY2021	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	900000	USD
CY2020	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	2700000	USD
CY2019	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	800000	USD
CY2021	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	2200000	USD
CY2019	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	3100000	USD
CY2021	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	200000	USD
CY2020	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	2500000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	USD
CY2021	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2020	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2019	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	6000000.0	USD
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	0	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	0	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	200000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	63700000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	53300000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-238800000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-18400000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-28800000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-341600000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	17600000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	11400000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-180700000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	16700000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	13100000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	24200000	USD
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	17400000	USD
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-40500000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-190800000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1916500000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1543800000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1674800000	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2000000.0	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	167700000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	0	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	0	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	78000000.0	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	4700000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1376600000	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	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	7850600000	USD
CY2021	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	89000000.0	USD
CY2020	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	71500000	USD
CY2019	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	18600000	USD
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	8300000	USD
CY2020	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	3200000	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	200000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	92600000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	67600000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	228900000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-173300000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-133200000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6811000000.0	USD
CY2021	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	3577800000	USD
CY2020	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	1989500000	USD
CY2021	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
CY2020	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	611900000	USD
CY2019	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
CY2021	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	615000000.0	USD
CY2020	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
CY2019	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	0	USD
CY2021	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	2611400000	USD
CY2020	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	615000000.0	USD
CY2019	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	0	USD
CY2021	us-gaap	Repayments Of Assumed Debt RepaymentsOfAssumedDebt	0	USD
CY2020	us-gaap	Repayments Of Assumed Debt RepaymentsOfAssumedDebt	0	USD
CY2019	us-gaap	Repayments Of Assumed Debt RepaymentsOfAssumedDebt	2056900000	USD
CY2021	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	21200000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	8900000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	72700000	USD
CY2021	mchp	Payments To Acquire Capped Call Options Related To Convertible Senior Notes PaymentsToAcquireCappedCallOptionsRelatedToConvertibleSeniorNotes	35800000	USD
CY2020	mchp	Payments To Acquire Capped Call Options Related To Convertible Senior Notes PaymentsToAcquireCappedCallOptionsRelatedToConvertibleSeniorNotes	0	USD
CY2019	mchp	Payments To Acquire Capped Call Options Related To Convertible Senior Notes PaymentsToAcquireCappedCallOptionsRelatedToConvertibleSeniorNotes	0	USD
CY2021	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	388300000	USD
CY2020	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	350100000	USD
CY2019	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	344400000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	60300000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	58800000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	42600000	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	64600000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	68100000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	71800000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	600000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	800000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	800000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1864200000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1438200000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	4663500000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-121000000.0	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-27600000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-472700000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	401000000.0	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	428600000	USD
CY2018Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	901300000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	280000000.0	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	401000000.0	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	428600000	USD
CY2021Q1	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2020Q1	us-gaap	Restricted Cash RestrictedCash	25000000.0	USD
CY2019Q1	us-gaap	Restricted Cash RestrictedCash	38400000	USD
CY2021	mchp	Non Cash Right Of Use Assets Obtained In Exchange For Lease Liabilities NonCashRightOfUseAssetsObtainedInExchangeForLeaseLiabilities	65600000	USD
CY2020	mchp	Non Cash Right Of Use Assets Obtained In Exchange For Lease Liabilities NonCashRightOfUseAssetsObtainedInExchangeForLeaseLiabilities	24800000	USD
CY2019	mchp	Non Cash Right Of Use Assets Obtained In Exchange For Lease Liabilities NonCashRightOfUseAssetsObtainedInExchangeForLeaseLiabilities		USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	265400000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	355200000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	347900000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	87300000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	101300000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	77600000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	47400000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	46500000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	3279800000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	355900000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1400000	USD
CY2019	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	53900000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	42600000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	71800000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	172800000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	344400000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	5287500000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	570600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	400000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	58800000	USD
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	68100000	USD
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	351800000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt Subsequent Adjustments AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments	438100000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	172700000	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	350100000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	5585500000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	349400000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4600000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	60300000	USD
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	64600000	USD
CY2021	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	3171100000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt Subsequent Adjustments AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments	3622100000	USD
CY2021	mchp	Adjustment To Additional Paid In Capital Purchase Of Capped Call Options AdjustmentToAdditionalPaidInCapitalPurchaseOfCappedCallOptions	35800000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	87700000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	198500000	USD
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	388300000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	5337100000	USD
CY2021Q1	mchp	Income Tax Benefit Tax Settlement Likely Realization Percent IncomeTaxBenefitTaxSettlementLikelyRealizationPercent	0.50
CY2021	us-gaap	Number Of Reporting Units NumberOfReportingUnits	2	reporting_unit
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentrations of Credit Risk</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:18pt"><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 the Company to concentrations of credit risk consist primarily of trade receivables. Concentrations of credit risk with respect to accounts receivable are generally not significant due to the diversity of the Company's customers and geographic sales areas. The Company sells its products primarily to OEMs and distributors in the Americas, Europe and Asia. The Company performs ongoing credit evaluations of its customers' financial condition and, as deemed necessary, may require collateral, primarily letters of credit.</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Distributor advances in the consolidated balance sheets, totaled $104.8 million and $141.0 million at March 31, 2021 and March 31, 2020, respectively. On sales to distributors, the Company's payment terms generally require the distributor to settle amounts owed to the Company for an amount in excess of their ultimate cost. The Company's sales price to its distributors may be higher than the amount that the distributors will ultimately owe the Company because distributors often negotiate price reductions after purchasing the products from the Company and such reductions are often significant. It is the Company's practice to apply these negotiated price discounts to future purchases, requiring the distributor to settle receivable balances, on a current basis, generally within 30 days, for amounts originally invoiced. This practice has an adverse impact on the working capital of the Company's distributors. As such, the Company has entered into agreements with certain distributors whereby it advances cash to the distributors to reduce the distributors' working capital requirements. These advances are reconciled at least on a quarterly basis and are estimated based on the amount of ending inventory as reported by the distributor multiplied by a negotiated percentage. Such advances have no impact on revenue recognition or the Company's consolidated statements of income. The terms of these advances are set forth in binding legal agreements and are unsecured, bear no interest on unsettled balances and are due upon demand. The agreements governing these advances can be canceled by the Company at any time.</span></div>
CY2021Q1	mchp	Amount Of Distributor Advances Included In Accounts Receivable AmountOfDistributorAdvancesIncludedInAccountsReceivable	104800000	USD
CY2020Q1	mchp	Amount Of Distributor Advances Included In Accounts Receivable AmountOfDistributorAdvancesIncludedInAccountsReceivable	141000000.0	USD
CY2021	mchp	Number Of Days Requiring Distributor To Settle Receivable Balances NumberOfDaysRequiringDistributorToSettleReceivableBalances	P30D
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has made a number of estimates and assumptions relating to the reporting of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities to prepare its consolidated financial statements in conformity with U.S. GAAP. Actual results could differ from those estimates.</span></div>
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2021	us-gaap	Severance Costs1 SeveranceCosts1	-1300000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5274200000	USD
CY2020	us-gaap	Severance Costs1 SeveranceCosts1	6000000.0	USD
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	65300000	USD
CY2021	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	5800000	USD
CY2020	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	1500000	USD
CY2019	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	0	USD
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	700000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	3600000	USD
CY2021	us-gaap	Business Exit Costs1 BusinessExitCosts1	-1600000	USD
CY2020	us-gaap	Business Exit Costs1 BusinessExitCosts1	5200000	USD
CY2019	us-gaap	Business Exit Costs1 BusinessExitCosts1	-4700000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	15000000.0	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	18000000.0	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2021	us-gaap	Other Restructuring Costs OtherRestructuringCosts	100000	USD
CY2020	us-gaap	Other Restructuring Costs OtherRestructuringCosts	2600000	USD
CY2019	us-gaap	Other Restructuring Costs OtherRestructuringCosts	-300000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5438400000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5274200000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5349500000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5438400000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5349500000	USD
CY2021	mchp	Revenue Payment Terms RevenuePaymentTerms	P30D
CY2021	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	-200000	USD
CY2020	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	-15700000	USD
CY2019	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	30200000	USD
CY2021	mchp	Contingent Consideration Revaluation ContingentConsiderationRevaluation	-4900000	USD
CY2020	mchp	Contingent Consideration Revaluation ContingentConsiderationRevaluation	0	USD
CY2019	mchp	Contingent Consideration Revaluation ContingentConsiderationRevaluation	0	USD
CY2021	us-gaap	Other Nonrecurring Income Expense OtherNonrecurringIncomeExpense	1700000	USD
CY2020	us-gaap	Other Nonrecurring Income Expense OtherNonrecurringIncomeExpense	46700000	USD
CY2019	us-gaap	Other Nonrecurring Income Expense OtherNonrecurringIncomeExpense	33700000	USD
CY2021	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	15000000.0	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	18000000.0	USD
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	2500000	USD
CY2020	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	-15700000	USD
CY2021	us-gaap	Business Exit Costs1 BusinessExitCosts1	-1600000	USD
CY2019	us-gaap	Business Exit Costs1 BusinessExitCosts1	-4700000	USD
CY2020	us-gaap	Business Exit Costs1 BusinessExitCosts1	5200000	USD
CY2021Q1	us-gaap	Restructuring Reserve RestructuringReserve	15900000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5438400000	USD
CY2021	us-gaap	Gross Profit GrossProfit	3378800000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5274200000	USD
CY2020	us-gaap	Gross Profit GrossProfit	3242100000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5349500000	USD
CY2019	us-gaap	Gross Profit GrossProfit	2931300000	USD
CY2021Q1	us-gaap	Noncurrent Assets NoncurrentAssets	1009000000.0	USD
CY2020Q1	us-gaap	Noncurrent Assets NoncurrentAssets	995600000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	349400000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	570600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	355900000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	259600000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	238900000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	236200000	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3500000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3400000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3800000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	270600000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	256200000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	249900000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.35
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.39
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.51
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.23
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.42
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2021Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	9209400000	USD
CY2020Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	10593300000	USD
CY2021Q1	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	273000000.0	USD
CY2020Q1	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	1043200000	USD
CY2021Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	32300000	USD
CY2020Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	67900000	USD
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	8904100000	USD
CY2020Q1	us-gaap	Long Term Debt LongTermDebt	9482200000	USD
CY2021Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	1322900000	USD
CY2020Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	608800000	USD
CY2021Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	7581200000	USD
CY2020Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	8873400000	USD
CY2021Q1	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	273000000.0	USD
CY2020Q1	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	1043200000	USD
CY2021Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	32300000	USD
CY2020Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	67900000	USD
CY2021Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1000000000.0	USD
CY2021Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	USD
CY2021Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	5746600000	USD
CY2021Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	806900000	USD
CY2021Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1200000000.0	USD
CY2021Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	455900000	USD
CY2021Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	9209400000	USD
CY2021	us-gaap	Debt Instrument Convertible If Converted Value In Excess Of Principal DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal	1000	USD
CY2021	us-gaap	Interest Expense Other InterestExpenseOther	3700000	USD
CY2020	us-gaap	Interest Expense Other InterestExpenseOther	3700000	USD
CY2019	us-gaap	Interest Expense Other InterestExpenseOther	2900000	USD
CY2021	us-gaap	Interest Expense InterestExpense	356900000	USD
CY2020	us-gaap	Interest Expense InterestExpense	497300000	USD
CY2019	us-gaap	Interest Expense InterestExpense	502900000	USD
CY2021Q1	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	8344400000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	3549600000	USD
CY2021Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4794800000	USD
CY2020Q1	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	8370300000	USD
CY2020Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2668000000.0	USD
CY2020Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	5702300000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	912000000.0	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	707200000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	627700000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	508100000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	445300000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	992700000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1046700000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	695800000	USD
CY2021	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	2200000	USD
CY2019	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	3100000	USD
CY2021	us-gaap	Number Of Reporting Units NumberOfReportingUnits	2	unit
CY2021Q1	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1002900000	USD
CY2020Q1	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	938900000	USD
CY2021Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5200000	USD
CY2020Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4900000	USD
CY2021Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	997700000	USD
CY2020Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	934000000.0	USD
CY2021Q1	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	115700000	USD
CY2020Q1	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	92300000	USD
CY2021Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	412800000	USD
CY2020Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	441700000	USD
CY2021Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	136500000	USD
CY2020Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	151700000	USD
CY2021Q1	us-gaap	Inventory Net InventoryNet	665000000.0	USD
CY2020Q1	us-gaap	Inventory Net InventoryNet	685700000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3096700000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2966100000	USD
CY2021Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2242000000.0	USD
CY2020Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2090000000.0	USD
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	854700000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	876100000	USD
CY2021	us-gaap	Depreciation Depreciation	160600000	USD
CY2020	us-gaap	Depreciation Depreciation	168900000	USD
CY2019	us-gaap	Depreciation Depreciation	180600000	USD
CY2021Q1	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	166700000	USD
CY2020Q1	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	137500000	USD
CY2021Q1	us-gaap	Taxes Payable Current TaxesPayableCurrent	43400000	USD
CY2020Q1	us-gaap	Taxes Payable Current TaxesPayableCurrent	38000000.0	USD
CY2021Q1	mchp	Sales Related Reserves SalesRelatedReserves	350700000	USD
CY2020Q1	mchp	Sales Related Reserves SalesRelatedReserves	353000000.0	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	39800000	USD
CY2020Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	44500000	USD
CY2021Q1	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	193700000	USD
CY2020Q1	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	208800000	USD
CY2021Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	794300000	USD
CY2020Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	781800000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	63100000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	70400000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	154300000	USD
CY2020Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	119500000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	154300000	USD
CY2020Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	119500000	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	39800000	USD
CY2020Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	44500000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	125400000	USD
CY2020Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	94700000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	165200000	USD
CY2020Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	139200000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	48200000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	32400000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	24200000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	17900000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	16400000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	61400000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	200500000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	35300000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	165200000	USD
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y10M17D
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0449
CY2021Q1	us-gaap	Loss Contingency Range Of Possible Loss Portion Not Accrued LossContingencyRangeOfPossibleLossPortionNotAccrued	100000000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-301700000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-485200000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-593400000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	641200000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	635600000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	797900000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	339500000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	150400000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	204500000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	54800000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	21100000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-98000000.0	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2000000.0	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1000000.0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-5300000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	72200000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	48000000.0	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	14100000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	129000000.0	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	70100000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-89200000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-215400000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-127800000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	11900000	USD
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CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-420200000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-151400000	USD
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CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	31500000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	43000000.0	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-3800000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-5400000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-8700000	USD
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-45700000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-78800000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-94000000.0	USD
CY2021	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	0	USD
CY2020	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	0	USD
CY2019	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	13100000	USD
CY2021	mchp	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Amount EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeAmount	101800000	USD
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CY2019	mchp	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Amount EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeAmount	95400000	USD
CY2021	mchp	Effective Income Tax Rate Reconciliation Business Realignment Amount EffectiveIncomeTaxRateReconciliationBusinessRealignmentAmount	-63800000	USD
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CY2021	mchp	Income Tax Reconciliation Increases Related To Current And Prior Year Tax Positions IncomeTaxReconciliationIncreasesRelatedToCurrentAndPriorYearTaxPositions	49800000	USD
CY2020	mchp	Income Tax Reconciliation Increases Related To Current And Prior Year Tax Positions IncomeTaxReconciliationIncreasesRelatedToCurrentAndPriorYearTaxPositions	20100000	USD
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CY2020	mchp	Income Tax Reconciliation Decreases Related To Prior Year Tax Positions IncomeTaxReconciliationDecreasesRelatedToPriorYearTaxPositions	28500000	USD
CY2019	mchp	Income Tax Reconciliation Decreases Related To Prior Year Tax Positions IncomeTaxReconciliationDecreasesRelatedToPriorYearTaxPositions	75100000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-12300000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-11100000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-13300000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	48400000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	40800000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	27500000	USD
CY2021	mchp	Income Tax Reconciliation Decrease Relatedto Intercompany Prepaid Tax Asset Amortization IncomeTaxReconciliationDecreaseRelatedtoIntercompanyPrepaidTaxAssetAmortization	0	USD
CY2020	mchp	Income Tax Reconciliation Decrease Relatedto Intercompany Prepaid Tax Asset Amortization IncomeTaxReconciliationDecreaseRelatedtoIntercompanyPrepaidTaxAssetAmortization	0	USD
CY2019	mchp	Income Tax Reconciliation Decrease Relatedto Intercompany Prepaid Tax Asset Amortization IncomeTaxReconciliationDecreaseRelatedtoIntercompanyPrepaidTaxAssetAmortization	-5200000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Settlements Foreign IncomeTaxReconciliationTaxSettlementsForeign	-6500000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Settlements Foreign IncomeTaxReconciliationTaxSettlementsForeign	-900000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Settlements Foreign IncomeTaxReconciliationTaxSettlementsForeign	4600000	USD
CY2021	mchp	Effective Income Tax Rate Reconciliation Convertible Debt Settlement Amount EffectiveIncomeTaxRateReconciliationConvertibleDebtSettlementAmount	-48100000	USD
CY2020	mchp	Effective Income Tax Rate Reconciliation Convertible Debt Settlement Amount EffectiveIncomeTaxRateReconciliationConvertibleDebtSettlementAmount	0	USD
CY2019	mchp	Effective Income Tax Rate Reconciliation Convertible Debt Settlement Amount EffectiveIncomeTaxRateReconciliationConvertibleDebtSettlementAmount	0	USD
CY2021	mchp	Effective Income Tax Rate Reconciliation Subpart F Income Amount EffectiveIncomeTaxRateReconciliationSubpartFIncomeAmount	-6400000	USD
CY2020	mchp	Effective Income Tax Rate Reconciliation Subpart F Income Amount EffectiveIncomeTaxRateReconciliationSubpartFIncomeAmount	-4100000	USD
CY2019	mchp	Effective Income Tax Rate Reconciliation Subpart F Income Amount EffectiveIncomeTaxRateReconciliationSubpartFIncomeAmount	-10700000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	7100000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1700000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-13300000	USD
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-13300000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-28600000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-9900000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-9900000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-420200000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-151400000	USD
CY2021	mchp	Income Tax Reconciliation Increases Related To Prior Year Tax Positions Earnings Per Share Diluted IncomeTaxReconciliationIncreasesRelatedToPriorYearTaxPositionsEarningsPerShareDiluted	0.02
CY2021	mchp	Income Tax Reconciliation Increases Related To Prior Year Tax Positions Earnings Per Share Basic IncomeTaxReconciliationIncreasesRelatedToPriorYearTaxPositionsEarningsPerShareBasic	0.02
CY2020	mchp	Income Tax Reconciliation Increases Related To Prior Year Tax Positions Earnings Per Share Basic IncomeTaxReconciliationIncreasesRelatedToPriorYearTaxPositionsEarningsPerShareBasic	0.12
CY2020	mchp	Income Tax Reconciliation Increases Related To Prior Year Tax Positions Earnings Per Share Diluted IncomeTaxReconciliationIncreasesRelatedToPriorYearTaxPositionsEarningsPerShareDiluted	0.11
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CY2019	mchp	Income Tax Reconciliation Increases Related To Prior Year Tax Positions Earnings Per Share Diluted IncomeTaxReconciliationIncreasesRelatedToPriorYearTaxPositionsEarningsPerShareDiluted	0.30
CY2021	us-gaap	Income Tax Holiday Aggregate Dollar Amount IncomeTaxHolidayAggregateDollarAmount	11100000	USD
CY2020	us-gaap	Income Tax Holiday Aggregate Dollar Amount IncomeTaxHolidayAggregateDollarAmount	11400000	USD
CY2021	mchp	Income Tax Holiday Income Tax Benefits Per Share Basic IncomeTaxHolidayIncomeTaxBenefitsPerShareBasic	0.04
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CY2020	mchp	Income Tax Holiday Income Tax Benefits Per Share Diluted IncomeTaxHolidayIncomeTaxBenefitsPerShareDiluted	0.04
CY2021	mchp	Effective Income Tax Rate Reconciliation Business Realignment Amount EffectiveIncomeTaxRateReconciliationBusinessRealignmentAmount	-63800000	USD
CY2021	mchp	Effective Income Tax Rate Reconciliation Business Realignment Percent EffectiveIncomeTaxRateReconciliationBusinessRealignmentPercent	-0.188
CY2021Q1	us-gaap	Deferred Tax Asset Intra Entity Transfer Asset Other Than Inventory DeferredTaxAssetIntraEntityTransferAssetOtherThanInventory	155500000	USD
CY2021Q1	us-gaap	Deferred Tax Liability Intra Entity Transfer Asset Other Than Inventory DeferredTaxLiabilityIntraEntityTransferAssetOtherThanInventory	90300000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	46000000.0	USD
CY2020Q1	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	48500000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	68000000.0	USD
CY2020Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	74800000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	6300000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	9400000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	46500000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	39800000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	331100000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	351100000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	32700000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	31700000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	83600000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	80400000	USD
CY2021Q1	mchp	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Intangible Assets DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsIntangibleAssets	1581500000	USD
CY2020Q1	mchp	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Intangible Assets DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsIntangibleAssets	1694800000	USD
CY2021Q1	mchp	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	37100000	USD
CY2020Q1	mchp	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	20200000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	17400000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	14000000.0	USD
CY2021Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2250200000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2364700000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	290300000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	303500000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1959900000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2061200000	USD
CY2021Q1	mchp	Deferred Tax Liability Seniorand Junior Convertible Debentures DeferredTaxLiabilitySeniorandJuniorConvertibleDebentures	53900000	USD
CY2020Q1	mchp	Deferred Tax Liability Seniorand Junior Convertible Debentures DeferredTaxLiabilitySeniorandJuniorConvertibleDebentures	228700000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Other Finite Lived Assets DeferredTaxLiabilitiesOtherFiniteLivedAssets	158100000	USD
CY2020Q1	us-gaap	Deferred Tax Liabilities Other Finite Lived Assets DeferredTaxLiabilitiesOtherFiniteLivedAssets	365100000	USD
CY2021Q1	mchp	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	34500000	USD
CY2020Q1	mchp	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	24300000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	8100000	USD
CY2020Q1	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	13100000	USD
CY2021Q1	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	254600000	USD
CY2020Q1	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	631200000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1705300000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1430000000.0	USD
CY2021Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1749200000	USD
CY2020Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1748500000	USD
CY2021Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	43900000	USD
CY2020Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	318500000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1705300000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1430000000.0	USD
CY2021Q1	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	6300000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	1900000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	85000000.0	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	4700000	USD
CY2021Q1	mchp	Deferred Tax Assets Tax Credit Carryforwards Foreign Refundable DeferredTaxAssetsTaxCreditCarryforwardsForeignRefundable	56600000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	757300000	USD
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	763400000	USD
CY2018Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	436000000.0	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	329700000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	6000000.0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1200000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	8300000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	10900000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	30900000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	16200000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	35400000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	30200000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	27800000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	50500000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4200000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	5600000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	826300000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	757300000	USD
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	763400000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	83900000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	74600000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	9300000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	13500000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	37500000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	826300000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	757300000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	720500000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	654000000.0	USD
CY2021Q1	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	10000000.0	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Contingencies Domestic IncomeTaxReconciliationTaxContingenciesDomestic	23300000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	70000000.0	USD
CY2019Q1	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	72700000	USD
CY2021	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	1600000	USD
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	1700000	USD
CY2021	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1000000.0	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	900000	USD
CY2021	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-8200000	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	2600000	USD
CY2021	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1500000	USD
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1500000	USD
CY2021	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-3700000	USD
CY2020	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	1200000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	83000000.0	USD
CY2020Q1	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	70000000.0	USD
CY2021Q1	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	76300000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	65100000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0093
CY2020Q1	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0148
CY2021	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0301
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0277
CY2021	mchp	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate Quarterly Average Yield Duration Years DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateQuarterlyAverageYieldDurationYears	P30Y
CY2021Q1	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	1600000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	1700000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	2200000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	2400000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	39.62
CY2021Q1	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	2600000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	14600000	USD
CY2021Q1	mchp	Defined Benefit Plan Expected Future Benefit Payments DefinedBenefitPlanExpectedFutureBenefitPayments	25100000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Expected Amortization Next Fiscal Year DefinedBenefitPlanExpectedAmortizationNextFiscalYear	3600000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	198300000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	170200000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	166400000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	42300000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	36900000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	35500000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	156000000.0	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	133300000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	130900000	USD
CY2018Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	121500000	USD
CY2021Q1	us-gaap	Share Price SharePrice	155.22
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	4091	shares
CY2021Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	300100000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y10M2D
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	284340	shares
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	31.21
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Other Increases Decreases In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod	141751	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Other Share Increase Decrease In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOtherShareIncreaseDecreaseInPeriodWeightedAverageExercisePrice	25.86
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	140118	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	27.67
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	281882	shares
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	77884	shares
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	149010	shares
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	31.59
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	30.16
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	130419	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	28.71
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	2453	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	20.02
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	31.48
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	629	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	19.47
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	70497	shares
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	31.81
CY2021Q1	us-gaap	Share Price SharePrice	155.22
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P2Y21D
CY2021Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	11000000.0	shares
CY2021	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-5700000	USD
CY2021Q1	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	15000000.0	shares
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2021	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-1100000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4600000	USD
CY2020	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-400000	USD
CY2020	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-800000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	400000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.494
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.465
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.457
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	388300000	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	350100000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	344400000	USD

Files In Submission

Name	View Source	Status
0000827054-21-000106-index-headers.html	Edgar Link	pending
0000827054-21-000106-index.html	Edgar Link	pending
0000827054-21-000106.txt	Edgar Link	pending
0000827054-21-000106-xbrl.zip	Edgar Link	pending
ex211q4fy21.htm	Edgar Link	pending
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ex312q4fy21.htm	Edgar Link	pending
ex32-amendedandrestatedbyl.htm	Edgar Link	pending
ex32q4fy21.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
mchp-20210331.htm	Edgar Link	pending
mchp-20210331.xsd	Edgar Link	pending
mchp-20210331_cal.xml	Edgar Link	unprocessable
mchp-20210331_def.xml	Edgar Link	unprocessable
mchp-20210331_g1.jpg	Edgar Link	pending
mchp-20210331_g2.jpg	Edgar Link	pending
mchp-20210331_htm.xml	Edgar Link	completed
mchp-20210331_lab.xml	Edgar Link	unprocessable
mchp-20210331_pre.xml	Edgar Link	unprocessable
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$MCHP
Microchip Technology Inc Stock $mchp

2021 Form 10-K Financial Statement

#000082705421000106 Filed on May 18, 2021

Income Statement

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Facts In Submission

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$MCHP Microchip Technology Inc Stock $mchp

2021 Form 10-K Financial Statement

#000082705421000106 Filed on May 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MCHP
Microchip Technology Inc Stock $mchp