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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Reconciliation Between Basic and Diluted Earnings Per Share | A reconciliation between basic and diluted earnings per share is as follows (in thousands, except per share data):
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Net Income attributable to Royal Caribbean Cruises Ltd. for basic and diluted earnings per share | $ | 1,811,042 |  |  | $ | 1,625,133 |  |  | $ | 1,283,388 |
Weighted-average common shares outstanding | 210,570 |  |  | 214,617 |  |  | 215,393 |
Dilutive effect of stock-based awards | 984 |  |  | 1,077 |  |  | 923 |
Diluted weighted-average shares outstanding | 211,554 |  |  | 215,694 |  |  | 216,316 |
Basic earnings per share | $ | 8.60 |  |  | $ | 7.57 |  |  | $ | 5.96 |
Diluted earnings per share | $ | 8.56 |  |  | $ | 7.53 |  |  | $ | 5.93 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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