Derivative Instruments (Details)	6 Months Ended
Sep. 30, 2014
Derivative [Line Items]
Percentage Of Company Sales Denominated In Us Dollars	99.00%

The percentage of the Company's transactions that are denominated in U.S. dollars.

No definition available.

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