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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Useful Lives of Property and Equipment Used in Computation of Depreciation | Depreciation of property and equipment is computed utilizing the following useful lives:
| Years
Ships | generally, 30-35
Ship improvements | 3-25
Buildings and improvements | 10-40
Computer hardware and software | 3-10
Transportation equipment and other | 3-30
Leasehold improvements | Shorter of remaining lease term or useful life 3-30

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