v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Aug. 14, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Transition Report false  
Amendment Flag false  
Document Quarterly Report true  
Entity Interactive Data Current Yes  
Document Period End Date Jun. 30, 2025  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q2  
Entity Registrant Name AB COMMERCIAL REAL ESTATE PRIVATE DEBT FUND, LLC  
Entity Central Index Key 0001876255  
Entity File Number 000-56320  
Entity Tax Identification Number 87-1137341  
Entity Incorporation, State or Country Code DE  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Address, Address Line One 66 Hudson Boulevard East  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
City Area Code 212  
Local Phone Number 486-5800  
Entity Address, Postal Zip Code 10001  
Entity Common Stock, Shares Outstanding   42,510,344