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Noncontrolling Interests (Reconciliation Of Income From Discontinued Operations) (Details) (USD $) In Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2010 | Sep. 30, 2010
Noncontrolling Interests [Abstract] |  |
(Loss) income from discontinued operations | $ (1.9) | $ 33.7
Income from discontinued operations attributable to noncontrolling interests |  | (0.2)
Income from discontinued operations attributable to Ensco | $ (1.9) | $ 33.5

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