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Unaudited Condensed Consolidated Financial Statements Unaudited Condensed Consolidated Financial Statements (Narrative) (Details) - Sales Revenue, Net [Member] $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Ensco DS-4 [Member]
Revenue from External Customer [Line Items]
Gain (Loss) on Contract Termination	$ 110.6
Ensco DS-9 [Member]
Revenue from External Customer [Line Items]
Gain (Loss) on Contract Termination	58.6
Other Nonrecurring Income	$ 18.4

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Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 420



-SubTopic 10



-Section 50



-Paragraph 1



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-Publisher FASB



-Name Accounting Standards Codification



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-Section 45



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Amount of other income that is infrequent in occurrence or unusual in nature.

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 20



-Section 50



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