Investments in and Advances to Real Estate Joint Ventures - Joint Venture Investments Accounted for Under the Equity Method, Debt Details (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
		Jun. 30, 2026	Dec. 31, 2025
Subsidiary or Equity Method Investee [Line Items]
Mortgage and notes payable		$ 1,328.2	$ 1,419.2
Prudential Investment Program [Member]
Subsidiary or Equity Method Investee [Line Items]
Mortgage and notes payable		$ 227.3	$ 233.9
Weighted average interest rate		4.98%	5.25%
Weighted average remaining term (Month)	[1]	16 months 12 days	22 months 6 days
KIR [Member]
Subsidiary or Equity Method Investee [Line Items]
Mortgage and notes payable		$ 273.2	$ 274.4
Weighted average interest rate		4.58%	4.58%
Weighted average remaining term (Month)	[1]	56 months 24 days	15 months 6 days
R2G Venture LLC [Member]
Subsidiary or Equity Method Investee [Line Items]
Mortgage and notes payable		$ 71.7	$ 70.7
Weighted average interest rate		2.90%	2.90%
Weighted average remaining term (Month)	[1]	56 months 21 days	62 months 18 days
CPP [Member]
Subsidiary or Equity Method Investee [Line Items]
Mortgage and notes payable	[2]	$ 0.0	$ 79.3
Weighted average interest rate	[2]	0.00%	5.25%
Weighted average remaining term (Month)	[1],[2]		7 months
Other Institutional Joint Ventures [Member]
Subsidiary or Equity Method Investee [Line Items]
Mortgage and notes payable		$ 222.9	$ 222.7
Weighted average interest rate		5.41%	5.41%
Weighted average remaining term (Month)	[1]	41 months 24 days	47 months 21 days
Other Joint Venture Programs [Member]
Subsidiary or Equity Method Investee [Line Items]
Mortgage and notes payable		$ 533.1	$ 538.2
Weighted average interest rate		4.81%	5.04%
Weighted average remaining term (Month)	[1]	34 months 21 days	33 months

[1] Includes extension options

[2] During the three months ended June 30, 2026, the CPP joint venture repaid $78.6 million of mortgage debt that encumbered an operating property.