v3.25.2
Document and Entity Information
Aug. 08, 2025
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001289490
Document Type 8-K
Document Period End Date Aug. 08, 2025
Entity Registrant Name EXTRA SPACE STORAGE INC.
Entity Incorporation State Country Code MD
Entity File Number 001-32269
Entity Tax Identification Number 20-1076777
Entity Address, Address Line One 2795 East Cottonwood Parkway
Entity Address, Address Line Two Suite 300
Entity Address, City or Town Salt Lake City
Entity Address, State or Province UT
Entity Address, Postal Zip Code 84121
City Area Code (801)
Local Phone Number 365-4600
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.01 par value
Trading Symbol EXR
Security Exchange Name NYSE
Entity Emerging Growth Company false