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Description Of The Business And Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Reconciliation Of Net Income Attributable To Ensco Shares Used In Basic And Diluted EPS Computations | The following table is a reconciliation of income (loss) from continuing operations attributable to Ensco shares used in our basic and diluted EPS computations for each of the years in the three-year period ended December 31, 2018 (in millions):
| 2018 |  | 2017 |  | 2016
Income (loss) from continuing operations attributable to Ensco | $ | (631.6 | ) |  | $ | (304.7 | ) |  | $ | 882.1 |
Income from continuing operations allocated to non-vested share awards | (.5 | ) |  | (.4 | ) |  | (16.6 | )
Income (loss) from continuing operations attributable to Ensco shares | $ | (632.1 | ) |  | $ | (305.1 | ) |  | $ | 865.5 |

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