v3.26.1
Cover Page
Apr. 16, 2026
Jan. 28, 2026
Document Information [Line Items]    
Document Type 8-K  
Document Period End Date Apr. 15, 2026  
Entity Registrant Name SL GREEN REALTY CORP  
Entity Incorporation, State or Country Code MD  
Entity File Number 1-13199  
Entity Tax Identification Number 13-3956775  
Entity Address, Address Line One One Vanderbilt Avenue  
Entity Address, City or Town New York,  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10017  
City Area Code 212  
Local Phone Number 594-2700  
Written Communications   false
Soliciting Material   false
Pre-commencement Tender Offer   false
Pre-commencement Issuer Tender Offer   false
Entity Emerging Growth Company false  
Entity Central Index Key 0001040971  
Amendment Flag false  
Common Stock    
Document Information [Line Items]    
Trading Symbol SLG  
Title of 12(b) Security Common Stock, $0.01 par value  
Security Exchange Name NYSE  
Preferred Stock    
Document Information [Line Items]    
Trading Symbol SLG.PRI  
Title of 12(b) Security 6.500% Series I Cumulative Redeemable Preferred Stock, $0.01 par value  
Security Exchange Name NYSE