Business Acquisition, Equity Interest Issued or Issuable, Value Assigned, Per Share

No definition available.

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- Definition

Number of Drillships owned by legacy Rowan

+ References

No definition available.

+ Details

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- Definition

Number of Jackup Rigs Owned by Acquiree

+ References

No definition available.

+ Details

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- Definition

Number of Newbuild Jackup Rigs

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Number of Rigs Owned by ARO

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of jackups leased by ARO

+ References

No definition available.

+ Details

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Namespace Prefix:	esv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Years for Jackup Rig Orders

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

+ Details

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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.

+ References

No definition available.

+ Details

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- Definition

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
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Balance Type:	credit
Period Type:	duration

- Definition

Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)(1)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

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Period Type:	instant

- Details

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Rowan Transaction (Details) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
	Apr. 11, 2019 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) jackup	Oct. 05, 2018 $ / shares
Business Acquisition [Line Items]
Number of Rigs Owned by ARO \| jackup		7
Number of jackups leased by ARO \| jackup		9
Number of Newbuild Jackup Rigs \| jackup		20
Years for Jackup Rig Orders		10 years
Number of Drillships owned by legacy Rowan \| jackup		4
Number of Jackup Rigs Owned \| jackup		19
Rowan Companies [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount		$ 201.1
Business Combination, Acquisition Related Costs		$ 5.9
Rowan Companies [Member] \| Common Class A [Member]
Business Acquisition [Line Items]
Share Price \| $ / shares			$ 33.92
Subsequent Event [Member] \| Rowan Companies [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned, Per Share \| $ / shares	$ 43.67
Business Combination, Consideration Transferred	$ 1,400.0
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	$ 0.0
Subsequent Event [Member] \| Rowan Companies [Member] \| Common Class A [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned, Per Share \| $ / shares	$ 2.750
Share Price \| $ / shares	$ 15.88
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares \| shares	88.3
Scenario, Forecast [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs	$ 14.2
Scenario, Forecast [Member] \| Rowan Companies [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 1,404.6