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Cover Page - USD ($)
 12 Months Ended
Mar. 31, 2026
May 01, 2026
Sep. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --03-31    
Document Period End Date Mar. 31, 2026    
Document Transition Report false    
Entity File Number 001-36436    
Entity Registrant Name DECKERS OUTDOOR CORP    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 95-3015862    
Entity Address, Address Line One 250 Coromar Drive    
Entity Address, City or Town Goleta    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 93117    
City Area Code 805    
Local Phone Number 967-7611    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol DECK    
Security Exchange Name NYSE    
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     $ 14,764,483,936
Entity Common Stock, Shares Outstanding (in shares)   138,880,957  
Documents Incorporated by Reference Portions of the registrant’s definitive Proxy Statement on Schedule 14A relating to the registrant’s 2026 annual
meeting of stockholders, to be filed with the Securities and Exchange Commission within 120 days after the end of
the fiscal year covered by this Annual Report on Form 10-K, are incorporated by reference in Part III within this
Annual Report on Form 10-K. 		   
Entity Central Index Key 0000910521    
Amendment Flag false    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY