Investments in Unconsolidated Entities (Narrative) (Details) - USD ($) $ in Millions	Apr. 01, 2021	Feb. 28, 2021	Nov. 30, 2020
Upward America Venture | Subsequent Event
Schedule of Equity Method Investments [Line Items]
Total equity commitments	$ 1,250.0
Total acquisition funding	$ 4,000.0
Multifamily
Schedule of Equity Method Investments [Line Items]
Non-recourse debt with completion guarantees		$ 660.0	$ 722.9