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Description Of The Business And Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Reconciliation Of Net Income Attributable To Valaris Shares Used In Basic And Diluted EPS Computations | The following table is a reconciliation of loss from continuing operations attributable to Valaris shares used in our basic and diluted EPS computations for each of the years in the three-year period ended December 31, 2020 (in millions):
| 2020 |  | 2019 |  | 2018
Loss from continuing operations attributable to Valaris | $ | (4,855.5) |  |  | $ | (198.0) |  |  | $ | (631.6) |
Income from continuing operations allocated to non-vested share awards (1) | — |  |  | (.1) |  |  | (.5) |
Loss from continuing operations attributable to Valaris shares | $ | (4,855.5) |  |  | $ | (198.1) |  |  | $ | (632.1) |
(1) Losses are not allocated to non-vested share awards. Due to the net loss position, potentially dilutive share awards are excluded from the computation of diluted EPS.

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