XML 16 R1.htm IDEA: XBRL DOCUMENT v3.21.1
COVER PAGE - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2021
May 07, 2021
Sep. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Period End Date Mar. 31, 2021    
Current fiscal year end date --03-31    
Document Transition Report false    
Entity File Number 0-21184    
Entity Registrant Name MICROCHIP TECHNOLOGY INCORPORATED    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 86-0629024    
Entity Address, Address Line One 2355 W. Chandler Blvd.    
Entity Address, City or Town Chandler    
Entity Address, State or Province AZ    
Entity Address, Postal Zip Code 85224-6199    
City Area Code 480    
Local Phone Number 792-7200    
Title of 12(b) Security Common Stock, $0.001 Par Value Per Share    
Trading Symbol MCHP    
Security Exchange Name NASDAQ    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   273,531,409  
Entity Central Index Key 0000827054    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Annual Report true    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Public Float     $ 26,200,000
Documents Incorporated by Reference
Documents Incorporated by Reference
DocumentPart of Form 10-K
Annual Report on Form 10-K for the fiscal year ended March 31, 2020II
Proxy Statement for the 2021 Annual Meeting of StockholdersIII