Debt - Additional Information (Detail) - Term Loan Facility [Member] - USD ($)						3 Months Ended	12 Months Ended
	Nov. 20, 2024	Jul. 31, 2023	Feb. 02, 2023	May 05, 2020	Jul. 31, 2018	Mar. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Principal payment on loan			$ 230,000,000				$ 120,000,000	$ 440,000,000
Principal amount outstanding			$ 800,000,000			$ 240,000,000
Line of credit, maturity date						Jul. 31, 2025
Line of credit, extended maturity date			Jul. 31, 2025			Jul. 31, 2026
Repayments of principal balance						$ 1,360,000,000
Debt instrument extended maturity term			2 years
Berkshire Hathaway [Member]
Debt Instrument [Line Items]
Date of senior secured term loan agreement					Jul. 31, 2018
Principal amount outstanding					$ 2,000,000,000
Line of credit, maturity date						Jul. 31, 2023
Line of credit, extended maturity date	Jul. 31, 2026					Jul. 31, 2025
Minimum rental income to achieve from tenants on annual basis to access incremental funding facility						$ 200,000,000
Minimum rental income to achieve from tenants for succeeding four consecutive fiscal quarters to access incremental funding facility						200,000,000
Minimum net worth required for loan documentation on book basis						$ 1,200,000,000
Default interest rate on overdue amounts excess of base interest rate				2.00%		2.00%
Deferred interest				$ 400,000,000
Debt instrument extended maturity term	1 year					2 years
Principal reduced by maturity date		$ 800,000,000
Percentage of operating partnership payment on extension fee	2.00%
Berkshire Hathaway [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio for each fiscal quarter after December 31, 2023						1.20%
Unencumbered fixed charge coverage ratio to each fiscal quarter after December 31, 2023						1.30%
Berkshire Hathaway [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unencumbered fixed charge coverage ratio						60.00%
Maximum leverage ratio						65.00%
Berkshire Hathaway [Member] | Maximum [Member] | Unrestricted Cash [Member]
Debt Instrument [Line Items]
Available cash				$ 30,000,000
Berkshire Hathaway [Member] | Initial Funding [Member]
Debt Instrument [Line Items]
Principal amount outstanding					1,600,000,000
Debt instrument, base annual interest rate						7.00%
Berkshire Hathaway [Member] | Incremental Funding Facility [Member]
Debt Instrument [Line Items]
Principal amount outstanding					$ 400,000,000
Debt instrument, base annual interest rate						1.00%