v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 25, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-42506    
Entity Registrant Name CALLAN JMB INC.    
Entity Central Index Key 0002032545    
Entity Tax Identification Number 99-0931141    
Entity Incorporation, State or Country Code NV    
Entity Address, Address Line One 244 Flightline Drive    
Entity Address, City or Town Spring Branch    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 78070-6241    
City Area Code (830)    
Local Phone Number 438-0395    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol CJMB    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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 Public Float     $ 7,398,291
Entity Common Stock, Shares Outstanding   5,627,368  
Documents Incorporated by Reference [Text Block] None    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Listing, Par Value Per Share $ 0.001    
Auditor Firm ID 89    
Auditor Opinion [Text Block] We have audited the accompanying consolidated balance sheets of Callan JMB Inc. (formerly Coldchain Technology Services, LLC) (the “Company”) as of December 31, 2025 and 2024, and the related consolidated statements of operations, statements of stockholders’ equity/members’ capital, and cash flows for each of the years then ended, and the related notes to the consolidated financial statements (collectively referred to as the financial statements). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the years then ended, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Name Rosenberg Rich Baker Berman, P.A.    
Auditor Location Somerset, New Jersey