Cover Page - shares	3 Months Ended
	Mar. 31, 2025	May 02, 2025
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2025
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		339,454,864
Entity Central Index Key	0001465128
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Amendment Flag	false