Discontinued Operations (Details) (USD $) In Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |
|---|---|---|---|---|---|---|
Dec. 31, 2010 | Sep. 30, 2010 | Sep. 30, 2011 | Dec. 31, 2010
Discontinued Operations Sale Of Ensco 60 [Member] | Sep. 30, 2010
Discontinued Operations Sale Of Jackup Rigs [Member] | Sep. 30, 2010
Discontinued Operations Sale Of Jackup Rigs [Member] | |
| Income Statement, Balance Sheet And Additional Disclosures By Disposal Groups, Including Discontinued Operations [Line Items] | ||||||
| Agreement to sell segment | $ 26.0 | |||||
| Gain on sale of Jackup Rigs | 9.4 | 141.8 | ||||
| Aggregate pre-tax gain | 51.8 | 5.7 | ||||
| Income from discontinued operations, net, included operating losses | $ (2.2) | $ (3.7) | ||||
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- Definition Memorandum of agreement to sell segment
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- Definition Proceeds On Sale Of Property Plant Equipment
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- Definition Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The gains (losses) included in earnings resulting from the sale or disposal of tangible assets. This item does not include any gain (loss) recognized on the sale of oil and gas property or timber property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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