v3.26.3
Cover - $ / shares
6 Months Ended
Sep. 30, 2026
Oct. 31, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2027  
Current Fiscal Year End Date --03-31  
Entity File Number 333-288068  
Entity Registrant Name YELLOWSTONE GROUP LTD  
Entity Central Index Key 0002071489  
Entity Tax Identification Number 99-3878528  
Entity Incorporation, State or Country Code NV  
Entity Address, Address Line One 48 Janice Street  
Entity Address, Address Line Two Seven Hills  
Entity Address, City or Town Sydney  
Entity Address, Country AU  
Entity Address, Postal Zip Code 2147  
City Area Code (+61)  
Local Phone Number 450315883  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   22,400,000
Entity Listing, Par Value Per Share $ 0.0001