XML 70 R51.htm IDEA: XBRL DOCUMENT v3.2.0.727

Supplemental Financial Information Supplemental Financial Information (Narrative) (Details) - Sales Revenue, Services, Net [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Customer Concentration Risk [Member] | Floaters [Member]
Concentration Risk, Percentage	100.00%	100.00%	100.00%	100.00%
Customer Concentration Risk [Member] | Total S.A. [Member] | Floaters [Member]
Concentration Risk, Percentage	10.00%	8.00%	9.00%	10.00%
Customer Concentration Risk [Member] | BP [Member]
Concentration Risk, Percentage	16.00%	17.00%	14.00%	17.00%
Customer Concentration Risk [Member] | BP [Member] | Floaters [Member]
Concentration Risk, Percentage	79.00%	81.00%	82.00%	80.00%
Geographic Concentration Risk [Member]
Revenues	$ 1,059,000,000.00	$ 1,136,600,000.00	$ 2,222,900,000.00	$ 2,203,300,000.00
Geographic Concentration Risk [Member] | US Gulf Of Mexico [Member]
Revenues	271,000,000.00	464,700,000.00	609,800,000.00	873,500,000.00
Geographic Concentration Risk [Member] | Angola [Member]
Revenues	$ 182,400,000	$ 157,800,000	$ 351,700,000	$ 308,400,000
Geographic Concentration Risk [Member] | Floaters [Member] | US Gulf Of Mexico [Member]
Concentration Risk, Percentage	83.00%	77.00%	84.00%	77.00%
Geographic Concentration Risk [Member] | Floaters [Member] | Angola [Member]
Concentration Risk, Percentage	91.00%	100.00%	90.00%	100.00%
Geographic Concentration Risk [Member] | Floaters [Member] | Brazil [Member]
Revenues	$ 115,700,000	$ 111,200,000	$ 238,400,000	$ 245,700,000

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 18



-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 825



-SubTopic 10



-Section 50



-Paragraph 20



-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 20



-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 825



-SubTopic 10



-Section 50



-Paragraph 21



-Subparagraph (a)



-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.1)



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueServicesNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=esv_FloatersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=esv_TotalS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=esv_BPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_GeographicConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=esv_UsGulfOfMexicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_AO
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_BR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: