v3.26.1
Cover Page - shares
3 Months Ended
Mar. 31, 2026
May 01, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-34436  
Entity Registrant Name Starwood Property Trust, Inc.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 27-0247747  
Entity Address, Address Line One 2340 Collins Avenue  
Entity Address, Address Line Two Suite 700  
Entity Address, City or Town Miami Beach  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33139  
City Area Code 305  
Local Phone Number 695-5500  
Title of 12(b) Security Common stock, $0.01 par value per share  
Trading Symbol STWD  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   370,748,570
Entity Central Index Key 0001465128  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false