0000034903 2021-05-05 2021-05-05 0000034903 frt:CommonSharesOfBeneficialInterestMember 2021-05-05 2021-05-05 0000034903 frt:DepositorySharesMember 2021-05-05 2021-05-05 0000034903 false 8-K 2021-05-05 Federal Realty Investment Trust MD 1-07533 52-0782497 909 Rose Avenue, Suite 200 North Bethesda, MD 20852 301 998-8100 Common Shares of Beneficial Interest FRT NYSE Depositary Shares, each representing 1/1000 of a share FRT-C NYSE false false false false false