Recently Issued Accounting Pronouncements (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
unrecognized tax benefit presented as a reduction to deferred tax assets for net operating loss carryforward and other tax credit carryforwards	$ 51.9

Amount of unrecognized tax benefit presented as a reduction to deferred tax assets for net operating loss carryforward and other tax credit carryforwards.

No definition available.

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