Name:	mchp_ConvertibleDebtInstrumentInitialConversionPricePerShare
Namespace Prefix:	mchp_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

The amount of debt discount from estimated fair value of the liability component of the debentures at the issuance date.

No definition available.

Name:	mchp_DebtDiscountOfEstimatedFairValueOfLiabilityComponentOfDebenturesAtIssuanceDate
Namespace Prefix:	mchp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The principal amount of convertible debt instrument that is used as the conversion unit to determine the number of shares the holder of the debt instrument can convert the debt into.

No definition available.

Name:	mchp_DebtInstrumentConvertibleConversionRatioAmountOfPrincipal
Namespace Prefix:	mchp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The initial ratio applied to the debt for purposes of determining the number of shares of the equity security into which the debt will be converted.

No definition available.

Name:	mchp_DebtInstrumentConvertibleInitialConversionRatio
Namespace Prefix:	mchp_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Debt Instrument, Convertible, Trading Price

No definition available.

Name:	mchp_DebtInstrumentConvertibleTradingPrice
Namespace Prefix:	mchp_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Equity portion of payment made to retire $575 million aggregate principal amount of junior convertible debentures

No definition available.

Name:	mchp_Equityportionofpaymentmadetoretire575millionaggregateprincipalamountofjuniorconvertibledebentures
Namespace Prefix:	mchp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Fair value of junior subordinated convertible debenture at the balance sheet date.

No definition available.

Name:	mchp_EstimatedFairValueOfLiabilityComponentOfDebenturesOnIssuanceDate
Namespace Prefix:	mchp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Liability portion of payment made to retire $575 million aggregate principal amount of junior convertible debentures

No definition available.

Name:	mchp_Liabilityportionofpaymentmadetoretire575millionaggregateprincipalamountofjuniorconvertibledebentures
Namespace Prefix:	mchp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Long-term Debt, Contingent Payment of Interest, Percentage

No definition available.

Name:	mchp_LongtermDebtContingentPaymentofInterestPercentage
Namespace Prefix:	mchp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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-Subparagraph (SX 210.5-03.8)

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Name:	us-gaap_AmortizationOfDebtDiscountPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The portion of the carrying value of convertible subordinated debt as of the balance sheet date that is scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_ConvertibleSubordinatedDebtNoncurrent
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Topic 470

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Name:	us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The price per share of the conversion feature embedded in the debt instrument.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Topic 470

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Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Conversion Rate

-URI http://asc.fasb.org/extlink&oid=6509012

Name:	us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

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Name:	us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Face (par) amount of debt instrument at time of issuance.

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Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The average effective interest rate during the reporting period.

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-Name Accounting Standards Codification

-Topic 835

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Name:	us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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-Topic 225

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Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Financing Activities

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