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Debt - Additional Information (Detail) - Term Loan Facility [Member] - USD ($) |  |  |  |  |  |  | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 30, 2025 | Nov. 20, 2024 | Jul. 31, 2023 | Feb. 02, 2023 | May 05, 2020 | Jul. 31, 2018 | Sep. 30, 2025
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal payment on loan |  |  |  | $ 230,000,000 |  |  | $ 40,000,000
Principal amount outstanding |  |  |  | $ 800,000,000 |  |  | $ 200,000,000
Line of credit, maturity date |  |  |  |  |  |  | Jul. 31, 2026
Line of credit, extended maturity date | Jul. 31, 2026 |  |  | Jul. 31, 2025 |  |  |
Repayments of principal balance |  |  |  |  |  |  | $ 1,400,000,000
Debt instrument extended maturity term |  |  |  | 2 years |  |  |
Unamortized extension fee |  |  |  |  |  |  | $ 3,300,000
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% | 2.00% |  |  |  |  |
Operating partnership payment on extension fee | $ 4,000,000 | $ 4,000,000 |  |  |  |  |
Incremental facility fee |  | $ 4,000,000 |  |  |  |  |
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%

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