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Unaudited Condensed Consolidated Financial Statements Unaudited Condensed Consolidated Financial Statements (Narrative) (Details) - Sales Revenue, Net [Member] $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)
Revenue from External Customer [Line Items]
Gain (Loss) on Contract Termination	$ 205.0
ENSCO DS-9 [Member]
Revenue from External Customer [Line Items]
Gain (Loss) on Contract Termination	185.0
ENSCO 8503 [Member]
Revenue from External Customer [Line Items]
Gain (Loss) on Contract Termination	$ 20.0

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+ References

No definition available.

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- Definition

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
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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