v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 11, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 000-56705  
Registrant Name FRANKLIN BSP REAL ESTATE DEBT, INC.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 99-3480205  
Entity Address, Address Line One One Madison Avenue  
Entity Address, Address Line Two Suite 1600  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10010  
City Area Code 212  
Local Phone Number 588-6770  
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  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Central Index Key 0002035428  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Common Shares Class G    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   5,046,223
Common Shares Class G-D    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   2,266,192
Common Shares Class G-S    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   2,339,784
Common Shares Class E    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   9,471
Class I Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   5,584