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Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) brand segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Exchange gains (losses) recorded in other income (expense) | $ 24,300 | $ (1,500) | $ 400
Derivative instrument, credit risk exposure | $ 1,900 | 26,900 |
Number of cruise brands | brand | 3 |  |
Number of operating segments | segment | 1 |  |
Accounting Standards Update [Extensible Enumeration] | Accounting Standards Update 2020-06 [Member] |  |
Decrease to retained earnings | $ (302,276) | (5,562,775) |
Cumulative Effect, Period of Adoption, Adjustment | Pro Forma |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Decrease to retained earnings | 146,000 |  |
Decrease to additional paid in capital | 308,000 |  |
Increase to long-term debt | $ 162,000 |  |
Lower Limit |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Investment in a joint venture, percentage of interest | 20.00% |  |
Upper Limit |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Investment in a joint venture, percentage of interest | 50.00% |  |
Ships | Lower Limit |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Property, plant and equipment, useful life | 30 years |  |
Residual value, percentage | 10.00% |  |
Drydock services period | 30 months |  |
Ships | Upper Limit |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Property, plant and equipment, useful life | 35 years |  |
Residual value, percentage | 15.00% |  |
Drydock services period | 60 months |  |
Media advertising |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Advertising costs | $ 303,200 | 138,100 | 309,400
Brochure, production and direct mail costs |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Advertising costs | $ 88,900 | $ 69,100 | $ 156,000
TUI Cruises | Not Primary Beneficiary |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Investment in a joint venture, percentage of interest | 50.00% |  |

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