Real Estate and Other Activities - Other Investment Activities - Additional Information (Detail) - 3 months ended Mar. 31, 2024 - Syndicated Term Loan [Member] £ in Millions, $ in Millions	GBP (£)	USD ($)
Business Acquisition [Line Items]
Gain (loss) on sale of interest in syndicated term loan	£ (6)	$ (7.8)
Proceed from sale of interest in syndicated term loan	£ 90	$ 115.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-5

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Balance Type:	na
Period Type:	duration