Assets Held for Sale (Details) - Land and Building [Member] - USD ($) $ in Millions		3 Months Ended
Jul. 22, 2015	Jun. 30, 2015
Long Lived Assets Held-for-sale [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure		$ 14.3
Asset Held-for-Sale Estimated Selling Cost		$ 0.6
Subsequent Event [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of asset held for sale	$ 14.3

The estimated selling cost to sell property, plant and equipment classified as assets held-for-sale

No definition available.

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

- Definition

Fair value portion of assets classified as held for sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

+ Details

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- Details

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- Details

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