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COVER PAGE 10-K - USD ($)
$ in Billions
 12 Months Ended
Mar. 31, 2025
May 15, 2025
Sep. 30, 2024
Document Information [Line Items]      
Document Type 10-K    
Document annual report true    
Document period end date Mar. 31, 2025    
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    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 42.2
Entity Common Stock, Shares Outstanding   539,399,446  
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, 2024
II
Proxy Statement for the 2025 Annual Meeting of Stockholders
(will be filed within 120 days after the end of the fiscal year to which this report relates)
III
    
Entity Central Index Key 0000827054    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false    
Common Stock      
Document Information [Line Items]      
Title of 12(b) Security Common Stock, $0.001 par value per share    
Trading Symbol MCHP    
Security Exchange Name NASDAQ    
Depository shares      
Document Information [Line Items]      
Title of 12(b) Security Depositary Shares, each representing a 1/20th interest in a share of 7.50% Series A Mandatory Convertible Preferred Stock, $0.001 par value per share    
Trading Symbol MCHPP    
Security Exchange Name NASDAQ