Real Estate and Other Activities - Investments in Unconsolidated Operating Entities - Additional Information (Detail) £ in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2024 GBP (£)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Syndicated Term Loan [Member]
Business Combination [Line Items]
Proceed from sale of interest in syndicated term loan	$ 115.0	£ 90
Gain (loss) on sale of interest in syndicated term loan	(7.8)	£ (6)
Other [Member]
Business Combination [Line Items]
Unfavorable fair market value adjustment on investment	$ 225.0		$ 154.0	$ 794.0
Other [Member] | PHP Holdings Equity Investment [Member]
Business Combination [Line Items]
Unfavorable fair market value adjustment on investment				$ 550.0