Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Weighted average unvested shares outstanding	300,000	300,000	300,000	300,000
Federal Realty OP LP
Weighted average unvested units outstanding	300,000	300,000	300,000	300,000
5.417% Series 1 Cumulative Convertible Preferred Shares, (stated at liquidation preference $25 per share), 392,878 and 399,896 shares issued and outstanding, respectively
Preferred shares, percentage	5.417%	5.417%	5.417%	5.417%	5.417%
Stock Options
Anti-dilutive issuable shares		682		682
Forward Sales Contracts
Anti-dilutive issuable shares	1,500,000	900,000	700,000	1,400,000
Forward Sales Contracts | Federal Realty OP LP
Anti-dilutive issuable units	1,500,000	900,000	700,000	1,400,000
Unvested restricted stock units
Anti-dilutive issuable shares	10,441	10,441	10,441	10,441