v2.3.0.15

Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2011
Earnings Per Share [Abstract] |
Reconciliation Of Net Income Attributable To Ensco Shares |
| Three Months Ended September 30, | Nine Months Ended September 30,
| 2011 | 2010 | 2011 | 2010
Net income attributable to Ensco |  | $204.5 |  | $130.5 |  | $371.0 |  | $446.6 |
Net income allocated to non-vested share awards |  | (2.3 | ) | (1.8 | ) | (4.3 | ) | (5.7 | )
Net income attributable to Ensco shares |  | $202.2 |  | $128.7 |  | $366.7 |  | $440.9 |
Reconciliation Of Weighted-Average Shares Used In Earnings Per Share Computations |
| Three Months Ended September 30, | Nine Months Ended September 30,
| 2011 | 2010 | 2011 | 2010
Weighted-average shares - basic |  | 228.1 |  | 141.1 |  | 180.0 |  | 140.9 |
Potentially dilutive share options |  | .5 |  | .1 |  | .4 |  | .1 |
Weighted-average shares - diluted |  | 228.6 |  | 141.2 |  | 180.4 |  | 141.0 |

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- Definition Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 260 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -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 -Topic 260 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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