Business And Organization	6 Months Ended
Jun. 30, 2026
Nature Of Operations [Abstract]
BUSINESS AND ORGANIZATION	BUSINESS AND ORGANIZATION Federal Realty Investment Trust is a leader in the ownership, operation, and redevelopment of high-quality retail-based properties located primarily in major coastal markets and select underserved regions that we believe have strong economic and demographic fundamentals. Founded in 1962, our mission is to deliver long-term, sustainable growth through investing in communities where we believe retail demand exceeds supply. This includes a portfolio of open-air shopping centers and mixed-use destinations, which we believe reflect our ability to create distinctive, high-performing environments that serve as vibrant destinations for their communities. The Parent Company, which is a REIT, conducts substantially all of its operations and owns substantially all of its assets through the Operating Partnership. The Parent Company owns 100% of the limited liability company interests of, is the sole member of and exercises exclusive control over Federal Realty GP LLC, which is the sole general partner of the Operating Partnership. The Parent Company does not expect to have substantial assets or liabilities other than through its investment in the Operating Partnership. As of June 30, 2026, we owned or had a majority interest in community and neighborhood shopping centers and mixed-use properties which are operated as 103 predominantly retail real estate projects. We operate in a manner intended to enable the Trust to qualify as a REIT for federal income tax purposes. A REIT that distributes at least 90% of its taxable income to its shareholders each year and meets certain other conditions is not taxed on that portion of its taxable income which is distributed to its shareholders. Therefore, federal income taxes on our taxable income have been and are generally expected to be immaterial. We are obligated to pay state taxes, generally consisting of franchise or gross receipts taxes in certain states. Such state taxes also have not been material. General Economic Conditions Significant uncertainty continues within the macro-economic and political environment including inflation risk, changes in interest rates, geopolitical instability, changes in tariffs and their impact on trade and prices, increases or decreases in federal and state government spending, and potentially worsening economic conditions, which presents risks for our business and tenants. We continue to monitor and address risks related to the general state of the economy. We believe the actions we have taken to maintain a strong financial position and reinforce our liquidity will continue to mitigate the negative short term impacts of the current environment. The extent of the future effects on our business, results of operations, cash flows, and growth strategies is highly uncertain and will ultimately depend on future developments, none of which can be predicted.

Federal Realty Investment Trust is a leader in the ownership, operation, and redevelopment of high-quality retail-based properties located primarily in major coastal markets and select underserved regions that we believe have strong economic and demographic fundamentals. Founded in 1962, our mission is to deliver long-term, sustainable growth through investing in communities where we believe retail demand exceeds supply. This includes a portfolio of open-air shopping centers and mixed-use destinations, which we believe reflect our ability to create distinctive, high-performing environments that serve as vibrant destinations for their communities.

The Parent Company, which is a REIT, conducts substantially all of its operations and owns substantially all of its assets through the Operating Partnership. The Parent Company owns 100% of the limited liability company interests of, is the sole member of and exercises exclusive control over Federal Realty GP LLC, which is the sole general partner of the Operating Partnership. The Parent Company does not expect to have substantial assets or liabilities other than through its investment in the Operating Partnership.

As of June 30, 2026, we owned or had a majority interest in community and neighborhood shopping centers and mixed-use properties which are operated as 103 predominantly retail real estate projects.

We operate in a manner intended to enable the Trust to qualify as a REIT for federal income tax purposes. A REIT that distributes at least 90% of its taxable income to its shareholders each year and meets certain other conditions is not taxed on that portion of its taxable income which is distributed to its shareholders. Therefore, federal income taxes on our taxable income have been and are generally expected to be immaterial. We are obligated to pay state taxes, generally consisting of franchise or gross receipts taxes in certain states. Such state taxes also have not been material.

Significant uncertainty continues within the macro-economic and political environment including inflation risk, changes in interest rates, geopolitical instability, changes in tariffs and their impact on trade and prices, increases or decreases in federal and state government spending, and potentially worsening economic conditions, which presents risks for our business and tenants. We continue to monitor and address risks related to the general state of the economy. We believe the actions we have taken to maintain a strong financial position and reinforce our liquidity will continue to mitigate the negative short term impacts of the current environment. The extent of the future effects on our business, results of operations, cash flows, and growth strategies is highly uncertain and will ultimately depend on future developments, none of which can be predicted.