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Description Of The Business And Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Description Of The Business And Summary Of Significant 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 (loss) income 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, 2015 (in millions):
| 2015 |  | 2014 |  | 2013
(Loss) income from continuing operations attributable to Ensco | $ | (1,466.1 | ) |  | $ | (2,703.1 | ) |  | $ | 1,421.6 |
Income from continuing operations allocated to non-vested share awards | (2.0 | ) |  | (7.9 | ) |  | (15.1 | )
(Loss) income from continuing operations attributable to Ensco shares | $ | (1,468.1 | ) |  | $ | (2,711.0 | ) |  | $ | 1,406.5 |
Reconciliation Of The Weighted-Average Shares Used In Basic And Diluted Earnings Per Share Computations | The following table is a reconciliation of the weighted-average shares used in our basic and diluted earnings per share computations for each of the years in the three-year period ended December 31, 2015 (in millions):
| 2015 |  | 2014 |  | 2013
Weighted-average shares - basic | 232.2 |  |  | 231.6 |  |  | 230.9 |
Potentially dilutive shares | — |  |  | — |  |  | .2 |
Weighted-average shares - diluted | 232.2 |  |  | 231.6 |  |  | 231.1 |
Schedule Of Income From Continuing Operations Attributable To Ensco | from continuing operations attributable to Ensco for each of the years in the three-year period ended December 31, 2015 was as follows (in millions):
| 2015 |  | 2014 |  | 2013
(Loss) income from continuing operations | $ | (1,457.3 | ) |  | $ | (2,689.3 | ) |  | $ | 1,430.1 |
Income from continuing operations attributable to noncontrolling interests | (8.8 | ) |  | (13.8 | ) |  | (8.5 | )
(Loss) income from continuing operations attributable to Ensco | $ | (1,466.1 | ) |  | $ | (2,703.1 | ) |  | $ | 1,421.6 |
Reconciliation of Income (Loss) from Discontinued Operations [Table Text Block] | from discontinued operations attributable to Ensco for each of the years in the three-year period ended December 31, 2015 was as follows (in millions):
| 2015 |  | 2014 |  | 2013
Loss from discontinued operations | $ | (128.6 | ) |  | $ | (1,199.2 | ) |  | $ | (2.2 | )
Income from discontinued operations attributable to noncontrolling interests | (.1 | ) |  | (.3 | ) |  | (1.2 | )
Loss from discontinued operations attributable to Ensco | $ | (128.7 | ) |  | $ | (1,199.5 | ) |  | $ | (3.4 | )

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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://www.xbrl.org/2003/role/presentationRef -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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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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