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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Nov. 30, 2017
Accounting Policies [Abstract] |
Depreciation and Amortization Expense Computation | Property and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over our estimates of useful lives and residual values, as a percentage of original cost, as follows:
| Years |  | Residual Values
Ships | 30 |  | 15%
Ship improvements | 3-30 |  | 0%
Buildings and improvements | 10-40 |  | 0% or 10%
Computer hardware and software | 3-12 |  | 0% or 10%
Transportation equipment and other | 3-20 |  | 0% or 10%
Leasehold improvements, including port facilities | Shorter of the remaining lease term or related asset life (3-30) |  | 0%

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