Debt Instrument Additional Basis On Variable Rate Base

No definition available.

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- Definition

Debt Instrument Interest Rate Spread On Overdue Amounts In Event Of Default

+ References

No definition available.

+ Details

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- Definition

Debt Instrument Interest Rate Spread On Overdue Principal In Event Of Default

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility Increase Option - An increase option in the credit agreement which provides, subject to certain requirements, the Company to arrange with existing lenders and/or new lenders to provide up to an aggregate of $250 million in additional commitments, whether for revolving loans or term loans.

+ References

No definition available.

+ Details

Name:	mchp_LineOfCreditFacilityIncreaseOption
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period For Leverage Ratio To Determine Interest Rate Spread

+ References

No definition available.

+ Details

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- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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- Definition

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

+ References

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

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number APB14-1

-Paragraph 31

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cost of borrowed funds accounted for as interest that was charged against earnings during the period.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 34

-Paragraph 21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.9)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 9

-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 9

-Chapter V

-Subsection II

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

+ Details

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- Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Credit facility (Details) (USD $)	3 Months Ended				3 Months Ended		3 Months Ended				3 Months Ended											3 Months Ended
Credit facility (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Credit Agreement Maturity June 27, 2018 [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member]	Jun. 30, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member]	Jun. 30, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member] Debt Instrument Interest Rate Option1 [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member] Debt Instrument Interest Rate Option1 [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member] Debt Instrument Interest Rate Option1 [Member] Minimum [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member] Debt Instrument Interest Rate Option1 [Member] Maximum [Member]	Jun. 30, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member] Debt Instrument Interest Rate Option 2 [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member] Debt Instrument Interest Rate Option 2 [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member] Debt Instrument Interest Rate Option 2 [Member] Minimum [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit [Member] Debt Instrument Interest Rate Option 2 [Member] Maximum [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit Facility Foreign Currency Sublimit [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit Facility Letter of Credit Sublimit [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Line of Credit Facility Swingline Loan Sublimit [Member]	Jun. 30, 2013 Credit Agreement Maturity June 27, 2018 [Member] Term loan [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Term loan [Member]	Jun. 30, 2013 Credit Agreement Maturity June 27, 2018 [Member] Revolving credit facility [Member]	Jun. 27, 2013 Credit Agreement Maturity June 27, 2018 [Member] Revolving credit facility [Member]	Jun. 30, 2012 Credit agreement Maturity August 12, 2016 [Member]
Line of Credit Facility [Line Items]
Initiation date			Jun. 27, 2013
Credit agreement				$ 2,000,000,000.0											$ 125,000,000	$ 35,000,000	$ 25,000,000		$ 350,000,000		$ 1,650,000,000.00
Borrowings outstanding under the Credit Agreement			610,000,000															350,000,000		260,000,000
Maturity Date			Jun. 27, 2018
Increase option amount				300,000,000
Debt discount			1,300,000
Spread on variable rate (percentage)									0.25%	1.25%			1.25%	2.25%
Description of variable rate basis							the highest of JPMorgan Chase Bank, N.A.'s prime rate, the federal funds rate plus a margin equal to 0.50% and the adjusted LIBOR rate for a 1-month interest period plus a margin equal to 1.00%				adjusted LIBOR rate (based on one, two, three, or six-month interest periods)
Additional basis on variable rate base (percentage)								0.50%				1.00%
Period for leverage ratio to determine interest rate spread					preceding four fiscal quarter period
Interest expense	$ 11,856,000	$ 9,148,000	$ 3,400,000																			$ 700,000
Interest rate spread on overdue principal in event of default (percentage)						2.00%
Interest rate spread on overdue amounts in event of default (percentage)						2.00%