Real Estate and Other Activities - Investments in Unconsolidated Operating Entities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Unfavorable fair market value adjustment on investment			$ 167.0	$ 720.0
Other [Member] | COVID-19 Pandemic [Member]
Business Combination [Line Items]
Favorable non-cash fair value adjustment on investment	$ 0.7	$ 144.0	$ 156.0	$ 739.0