v3.25.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2025
Apr. 30, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Securities Act File Number 001-32319  
Entity Registrant Name Sunstone Hotel Investors, Inc.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 20-1296886  
Entity Address, Address Line One 15 Enterprise, Suite 200  
Entity Address, City or Town Aliso Viejo  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92656  
City Area Code 949  
Local Phone Number 330-4000  
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   198,858,961
Entity Central Index Key 0001295810  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Common Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, $0.01 par value  
Trading Symbol SHO  
Security Exchange Name NYSE  
Series H Preferred Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Series H Cumulative Redeemable Preferred Stock, $0.01 par value  
Trading Symbol SHO.PRH  
Security Exchange Name NYSE  
Series I Cumulative Redeemable Preferred Stock    
Document Information [Line Items]    
Title of 12(b) Security Series I Cumulative Redeemable Preferred Stock, $0.01 par value  
Trading Symbol SHO.PRI  
Security Exchange Name NYSE