v3.26.3
Document and Entity Information
Nov. 02, 2026
Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Nov. 02, 2026
Entity Registrant Name Federal Realty Investment Trust
Entity Incorporation State Country Code MD
Entity File Number 1-07533
Entity Tax Identification Number 87-3916363
Entity Address Address Line 1 909 Rose Avenue, Suite 200
Entity Address City Or Town North Bethesda
Entity Address State Or Province MD
Entity Address Postal Zip Code 20852
City Area Code 301
Local Phone Number 998-8100
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 0000034903
Amendment Flag false
Depositary Shares, each representing 1/1000 of a 5.00% Series C Cumulative Redeemable Preferred Share of Beneficial Interest, $.01 par value per share [Member]  
Entity Information [Line Items]  
Security 12b Title Depositary Shares, each representing 1/1000 of a 5.00% Series C Cumulative Redeemable Preferred Share of Beneficial Interest, $.01 par value per share
Trading Symbol FRT-C
Security Exchange Name NYSE
Depository Shares [Member]  
Entity Information [Line Items]  
Security 12b Title Common Shares of Beneficial Interest $.01 par value per share, with associated Common Share Purchase Rights
Trading Symbol FRT
Security Exchange Name NYSE