v3.26.1
Cover
12 Months Ended
Jan. 31, 2026
Entity Addresses [Line Items]  
Document Type S-1
Amendment Flag true
Amendment Description AMENDMENT NO. 1
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2026
Entity Registrant Name GREENLAND ENERGY COMPANY
Entity Central Index Key 0002093507
Entity Incorporation, State or Country Code TX
Entity Address, Address Line One 3400 East Bayaud Avenue
Entity Address, Address Line Two Suite 400
Entity Address, City or Town Denver
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80209
City Area Code 918
Local Phone Number 361-7000
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Business Contact [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 3400 East Bayaud Avenue
Entity Address, Address Line Two Suite 400
Entity Address, City or Town Denver
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80209
City Area Code 918
Local Phone Number 361-7000
Contact Personnel Name Robert Price