10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

     Washington, D.C. 20549     

FORM 10-Q

(Mark One)
x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2012

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from  to

Commission File Number 1-8097

Ensco plc

(Exact name of registrant as specified in its charter)

England and Wales (State or other jurisdiction of incorporation or organization) 6 Chesterfield Gardens London, England (Address of principal executive offices) 98-0635229 (I.R.S. Employer Identification No.) W1J 5BQ (Zip Code)

 Registrant's telephone number, including area code:  44 (0) 20 7659 4660

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes x  No  o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes x        No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	o
Non-Accelerated filer	o  (Do not check if a smaller reporting company)	Smaller reporting company	o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  o      No  x

As of July 19, 2012, there were 231,990,811 Class A ordinary shares of the registrant issued and outstanding.

ENSCO PLC

INDEX TO FORM 10-Q

FOR THE QUARTER ENDED JUNE 30, 2012

PART I      FINANCIAL INFORMATION
ITEM 1.   FINANCIAL STATEMENTS	3
Report of Independent Registered Public Accounting Firm	3
Condensed Consolidated Statements of Income Three Months Ended June 30, 2012 and 2011	4
Condensed Consolidated Statements of Income Six Months Ended June 30, 2012 and 2011	4
Condensed Consolidated Statements of Comprehensive Income Three Months Ended June 30, 2012 and 2011	6
Condensed Consolidated Statements of Comprehensive Income Six Months Ended June 30, 2012 and 2011	6
Condensed Consolidated Balance Sheets June 30, 2012 and December 31, 2011	8
Condensed Consolidated Statements of Cash Flows Six Months Ended June 30, 2012 and 2011	9
Notes to Condensed Consolidated Financial Statements	10
ITEM 2.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	36
ITEM 3.   QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	53
ITEM 4.   CONTROLS AND PROCEDURES	53
PART II     OTHER INFORMATION
ITEM 1.   LEGAL PROCEEDINGS	54
ITEM 1A. RISK FACTORS	56
ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	60
ITEM 6.  EXHIBITS	61
SIGNATURES	63

EXPLANATORY NOTE

On May 31, 2011 (the "Merger Date"), Ensco plc completed the acquisition of Pride International, Inc., a Delaware corporation ("Pride") through a merger transaction (the "Merger") with an indirect, wholly-owned subsidiary of Ensco plc.

In connection with the integration of Pride’s operations, we are in the process of changing the names of most of Pride’s fleet in accordance with our naming convention. For purposes of this quarterly report, we used the new names whether or not the name change had been legally completed. For a list of the new and old rig names, see our most recent Fleet Status Report posted in the Investor Relations section of our website at www.enscoplc.com. Information contained on our website is not included as part of, or incorporated by reference into, this report.

FORWARD-LOOKING STATEMENTS

Statements contained in this report that are not historical facts are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934.  Forward-looking statements include words or phrases such as "anticipate," "believe," "estimate," "expect," "intend," "plan," "project," "could," "may," "might," "should," "will" and similar words and specifically include statements regarding expected financial performance; expected utilization, day rates, revenues, operating expenses, contract term, contract backlog, capital expenditures, insurance, financing and funding; the timing of availability, delivery, mobilization, contract commencement or relocation or other movement of rigs; future rig construction (including construction in progress and completion thereof), enhancement, upgrade or repair and timing thereof; the suitability of rigs for future contracts; general market, business and industry conditions, trends and outlook; future operations; the impact of increasing regulatory complexity; expected contributions from our rig fleet expansion program and our program to high-grade the rig fleet by investing in new equipment and divesting selected assets and underutilized rigs; expense management; and the likely outcome of litigation, legal proceedings, investigations or insurance or other claims and the timing thereof.

Such statements are subject to numerous risks, uncertainties and assumptions that may cause actual results to vary materially from those indicated, including:

• downtime and other risks associated with offshore rig operations or rig relocations, including rig or equipment failure, damage and other unplanned repairs, the limited availability of transport vessels, hazards, self-imposed drilling limitations and other delays due to severe storms and hurricanes and the limited availability or high cost of insurance coverage for certain offshore perils, such as hurricanes in the Gulf of Mexico or associated removal of wreckage or debris;

• changes in worldwide rig supply and demand, competition or technology, including changes as a result of delivery of newbuild drilling rigs;

• changes in future levels of drilling activity and expenditures, whether as a result of global capital markets and liquidity, prices of oil and natural gas or otherwise, which may cause us to idle or stack additional rigs;

• governmental action, terrorism, piracy, military action and political and economic uncertainties, including uncertainty or instability resulting from civil unrest, political demonstrations, mass strikes, or an escalation or additional outbreak of armed hostilities or other crises in oil or natural gas producing areas of the Middle East, North Africa, West Africa or other geographic regions, which may result in expropriation, nationalization, confiscation or deprivation of our assets or result in claims of a force majeure situation;

• potential long-lived asset or goodwill impairments;

1

• risks inherent to shipyard rig construction, repair or enhancement, including risks associated with concentration of our construction contracts with two shipyards, unexpected delays in equipment delivery and engineering or design issues following delivery, or changes in the commencement, completion or service dates;

• the outcome of litigation, legal proceedings, investigations or other claims or contract disputes, including any inability to collect receivables or resolve significant contractual or day rate disputes, any purported renegotiation, nullification, cancellation or breach of contracts with customers or other parties and any failure to negotiate or complete definitive contracts following announcements of receipt of letters of intent;

• governmental regulatory, legislative and permitting requirements or other events affecting drilling operations, including limitations on drilling locations, such as the Gulf of Mexico during hurricane season;

• new and future regulatory, legislative or permitting requirements, future lease sales, changes in laws, rules and regulations that have or may impose increased financial responsibility, additional oil spill abatement contingency plan capability requirements and other governmental actions that may result in claims of force majeure or otherwise adversely affect our existing drilling contracts;

• possible cancellation or suspension of drilling contracts as a result of mechanical difficulties, performance or other reasons or delays in actual contract commencement dates;

• our ability to attract and retain skilled personnel on commercially reasonable terms, whether due to labor regulations, unionization or otherwise;

• environmental or other liabilities, risks or losses, whether related to storm or hurricane damage, losses or liabilities (including wreckage or debris removal), collisions, groundings, blowouts, fires, explosions and other accidents or terrorism or otherwise, for which insurance coverage and contractual indemnities may be insufficient, unenforceable or otherwise unavailable;

• our debt levels and debt agreement restrictions may limit our liquidity and flexibility in obtaining additional financing and in pursuing other business opportunities;

• adverse changes in foreign currency exchange rates, including their effect on the fair value measurement of our derivative instruments;

• our ability to realize expected benefits from the December 2009 redomestication as a U.K. public limited company and the related reorganization of Ensco's corporate structure (the "redomestication"), including the effect of any changes in laws, rules and regulations, or the interpretation thereof, or in the applicable facts, that could adversely affect our status as a non-U.S. corporation for U.S. tax purposes or otherwise adversely affect our anticipated consolidated effective income tax rate; and

• risks associated with the issuance and trading of our Class A ordinary shares that were not associated with our American depositary shares.

In addition to the numerous risks, uncertainties and assumptions described above, you should also carefully read and consider "Item 1A. Risk Factors" in Part I and "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" in Part II of our annual report on Form 10-K for the year ended December 31, 2011, as updated in our quarterly report on Form 10-Q, which are available on the SEC's website at www.sec.gov. Each forward-looking statement speaks only as of the date of the particular statement, and we undertake no obligation to publicly update or revise any forward-looking statements, except as required by law.

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PART I - FINANCIAL INFORMATION

Item 1.Financial Statements

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Shareholders

Ensco plc:

We have reviewed the condensed consolidated balance sheet of Ensco plc and subsidiaries (the Company) as of June 30, 2012, the related condensed consolidated statements of income for the three-month and six-month periods ended June 30, 2012 and 2011, the related condensed consolidated statements of comprehensive income for the three-month and six-month periods ended June 30, 2012 and 2011, and the related condensed consolidated statements of cash flows for the six-month periods ended June 30, 2012 and 2011. These condensed consolidated financial statements are the responsibility of the Company’s management.

We conducted our review in accordance with the standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the Public Company Accounting Oversight Board (United States), the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion. Based on our review, we are not aware of any material modifications that should be made to the condensed consolidated financial statements referred to above for them to be in conformity with U.S. generally accepted accounting principles.

We have previously audited, in accordance with standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet of Ensco plc and subsidiaries as of December 31, 2011, and the related consolidated statements of income and cash flows for the year then ended (not presented herein); and in our report dated February 24, 2012, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying condensed consolidated balance sheet as of December 31, 2011 is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ KPMG LLP

Houston, Texas

July 26, 2012

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ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In millions, except per share amounts)

(Unaudited)

	Three Months Ended June 30,
	2012			2011
OPERATING REVENUES	$	1,072.0		$	564.2
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	489.7			286.3
Depreciation	139.5			83.5
General and administrative	35.5			47.4
	664.7			417.2
OPERATING INCOME	407.3			147.0
OTHER INCOME (EXPENSE)
Interest income	5.8			2.3
Interest expense, net	(30.0		)	(19.6		)
Other, net	(.3		)	(.8		)
	(24.5		)	(18.1		)
INCOME BEFORE INCOME TAXES	382.8			128.9
PROVISION FOR INCOME TAXES
Current income tax expense	33.6			27.9
Deferred income tax expense (benefit)	6.5			(2.6		)
	40.1			25.3
NET INCOME	342.7			103.6
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4		)	(1.7		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	341.3		$	101.9
EARNINGS PER SHARE
Basic	$	1.47		$	0.59
Diluted	$	1.47		$	0.59
NET INCOME ATTRIBUTABLE TO ENSCO SHARES
Basic	$	337.8		$	100.9
Diluted	$	337.8		$	100.9
WEIGHTED-AVERAGE SHARES OUTSTANDING
Basic	229.2			169.8
Diluted	229.4			170.2
CASH DIVIDENDS PER SHARE	$	.375		$	.35

The accompanying notes are an integral part of these condensed consolidated financial statements.

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ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In millions, except per share amounts)

(Unaudited)

	Six Months Ended June 30,
	2012			2011
OPERATING REVENUES	$	2,098.4		$	925.7
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	1,009.9			477.9
Depreciation	278.9			143.0
General and administrative	73.7			77.5
	1,362.5			698.4
OPERATING INCOME	735.9			227.3
OTHER INCOME (EXPENSE)
Interest income	11.7			2.5
Interest expense, net	(64.6		)	(23.7		)
Other, net	2.2			5.3
	(50.7		)	(15.9		)
INCOME BEFORE INCOME TAXES	685.2			211.4
PROVISION FOR INCOME TAXES
Current income tax expense	64.0			54.2
Deferred income tax expense (benefit)	11.1			(11.9		)
	75.1			42.3
NET INCOME	610.1			169.1
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(3.4		)	(2.6		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	606.7		$	166.5
EARNINGS PER SHARE
Basic	$	2.62		$	1.06
Diluted	$	2.62		$	1.06
NET INCOME ATTRIBUTABLE TO ENSCO SHARES
Basic	$	600.5		$	164.5
Diluted	$	600.5		$	164.5
WEIGHTED-AVERAGE SHARES OUTSTANDING
Basic	229.0			155.6
Diluted	229.3			155.9
CASH DIVIDENDS PER SHARE	$	.75		$	.70

The accompanying notes are an integral part of these condensed consolidated financial statements.

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ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In millions)

(Unaudited)

	Three Months Ended June 30,
	2012			2011
NET INCOME	$	342.7		$	103.6
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	(.1		)	3.1
Reclassification of gains and losses on derivative instruments from other comprehensive income into net income	(.8		)	(1.5		)
Other	.4			—
NET OTHER COMPREHENSIVE INCOME (LOSS)	(.5		)	1.6
COMPREHENSIVE INCOME	342.2			105.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4		)	(1.7		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	340.8		$	103.5

The accompanying notes are an integral part of these condensed consolidated financial statements.

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ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In millions)

(Unaudited)

	Six Months Ended June 30,
	2012			2011
NET INCOME	$	610.1		$	169.1
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	6.2			6.0
Reclassification of gains and losses on derivative instruments from other comprehensive income into net income	(.9		)	(2.3		)
Other	(1.5		)	—
NET OTHER COMPREHENSIVE INCOME	3.8			3.7
COMPREHENSIVE INCOME	613.9			172.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(3.4		)	(2.6		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	610.5		$	170.2

The accompanying notes are an integral part of these condensed consolidated financial statements.

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ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(In millions, except share and par value amounts)

	June 30, 2012			December 31, 2011
	(Unaudited)
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	226.7		$	430.7
Accounts receivable, net	856.3			851.7
Other	377.5			398.9
Total current assets	1,460.5			1,681.3
PROPERTY AND EQUIPMENT, AT COST	15,311.8			14,483.4
Less accumulated depreciation	2,327.8			2,061.5
Property and equipment, net	12,984.0			12,421.9
GOODWILL	3,274.0			3,274.0
OTHER ASSETS, NET	439.7			521.6
	$	18,158.2		$	17,898.8
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable - trade	$	541.9		$	644.4
Accrued liabilities and other	539.8			515.7
Short-term debt	22.0			125.0
Current maturities of long-term debt	47.5			47.5
Total current liabilities	1,151.2			1,332.6
LONG-TERM DEBT	4,838.0			4,877.6
DEFERRED INCOME TAXES	334.3			339.5
OTHER LIABILITIES	419.3			464.6
COMMITMENTS AND CONTINGENCIES
ENSCO SHAREHOLDERS' EQUITY
Class A ordinary shares, U.S. $.10 par value, 450.0 million shares      authorized and 237.7 million shares issued	23.8			23.6
Class B ordinary shares, £1 par value, 50,000 shares authorized and issued	.1			.1
Additional paid-in capital	5,354.1			5,253.0
Retained earnings	6,045.9			5,613.1
Accumulated other comprehensive income	12.4			8.6
Treasury shares, at cost, 5.6 million shares and 4.9 million shares	(27.8		)	(19.1		)
Total Ensco shareholders' equity	11,408.5			10,879.3
NONCONTROLLING INTERESTS	6.9			5.2
Total equity	11,415.4			10,884.5
	$	18,158.2		$	17,898.8

The accompanying notes are an integral part of these condensed consolidated financial statements.

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ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In millions)

(Unaudited)

	Six Months Ended June 30,
	2012			2011
OPERATING ACTIVITIES
Net income	$	610.1		$	169.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	278.9			143.0
Amortization of intangibles and other, net	(17.5		)	14.9
Share-based compensation expense	23.6			22.2
Deferred income tax expense (benefit)	11.1			(11.9		)
Other	(10.2		)	(12.9		)
Changes in operating assets and liabilities	114.6			(148.6		)
Net cash provided by operating activities	1,010.6			175.8
INVESTING ACTIVITIES
Additions to property and equipment	(1,047.1		)	(265.6		)
Proceeds from disposition of assets	57.1			44.4
Acquisition of Pride International, Inc., net of cash acquired	—			(2,656.0		)
Other	4.5			(4.5		)
Net cash used in investing activities	(985.5		)	(2,881.7		)
FINANCING ACTIVITIES
Cash dividends paid	(173.8		)	(130.7		)
Commercial paper borrowings, net	(102.9		)	89.9
Reduction of long-term borrowings	(23.7		)	(189.6		)
Proceeds from issuance of senior notes	—			2,462.8
Reimbursement of equity issuance cost	66.7			(.6		)
Debt financing costs	—			(31.8		)
Other	3.4			9.1
Net cash provided by (used in) financing activities	(230.3		)	2,209.1
Effect of exchange rate changes on cash and cash equivalents	1.2			.1
DECREASE IN CASH AND CASH EQUIVALENTS	(204.0		)	(496.7		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	430.7			1,050.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	226.7		$	554.0

The accompanying notes are an integral part of these condensed consolidated financial statements.

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ENSCO PLC AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 1 -Unaudited Condensed Consolidated Financial Statements

We prepared the accompanying condensed consolidated financial statements of Ensco plc and subsidiaries (the "Company," "Ensco," "we" or "us") in accordance with accounting principles generally accepted in the United States of America ("GAAP"), pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") included in the instructions to Form 10-Q and Article 10 of Regulation S-X. The financial information included in this report is unaudited but, in our opinion, includes all adjustments (consisting of normal recurring adjustments) that are necessary for a fair presentation of our financial position, results of operations and cash flows for the interim periods presented. The December 31, 2011 condensed consolidated balance sheet data were derived from our 2011 audited consolidated financial statements, but do not include all disclosures required by GAAP. Certain previously reported amounts have been reclassified to conform to the current year presentation, including retrospective adjustments made to our 2011 condensed consolidated balance sheet to properly reflect the final amount of goodwill recognized as a result of the Merger. The preparation of our condensed consolidated financial statements requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, the related revenues and expenses and disclosures of gain and loss contingencies as of the date of the financial statements. Actual results could differ from those estimates.

The financial data for the three-month and six-month periods ended June 30, 2012 and 2011 included herein have been subjected to a limited review by KPMG LLP, our independent registered public accounting firm. The accompanying independent registered public accounting firm's review report is not a report within the meaning of Sections 7 and 11 of the Securities Act of 1933, and the independent registered public accounting firm's liability under Section 11 does not extend to it.

Results of operations for the three-month and six-month periods ended June 30, 2012 are not necessarily indicative of the results of operations that will be realized for the year ending December 31, 2012. We recommend these condensed consolidated financial statements be read in conjunction with our annual report on Form 10-K for the year ended December 31, 2011 and our quarterly report on Form 10-Q filed with the SEC on February 24, 2012 and May 3, 2012, respectively.

Note 2 -Acquisition of Pride International, Inc.

Assets Acquired and Liabilities Assumed

The Merger was accounted for using the acquisition method of accounting, which requires that assets acquired and liabilities assumed be recorded at their estimated fair values as of the Merger Date. The excess of the consideration transferred over the estimated fair values of the net assets acquired was recorded as goodwill. We have finalized the determination of the fair values of the assets acquired and liabilities assumed as set forth below. The acquired assets and assumed liabilities were subject to adjustment during a one-year measurement period subsequent to the Merger Date as permitted under GAAP.  The estimated fair values of certain assets and liabilities, primarily inventory, taxes and contingencies, required judgments and assumptions that resulted in adjustments made to these estimates during the measurement period.  

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The provisional amounts recognized at the Merger Date, respective measurement period adjustments and final estimated fair values recorded for assets acquired and liabilities assumed were as follows:

	Amounts Recognized as of Merger Date		Measurement Period Adjustments(1)			Estimated Fair Value
Assets:
Cash and cash equivalents	$	147.0	$	—		$	147.0
Accounts receivable(2)	371.3		38.1			409.4
Other current assets	150.9		32.7			183.6
Property and equipment	6,758.8		(9.4		)	6,749.4
Other assets	343.7		27.8			371.5
Liabilities:
Accounts payable and accrued liabilities and other	539.8		60.6			600.4
Debt	2,436.0		—			2,436.0
Deferred income tax liabilities	19.0		(.1		)	18.9
Other liabilities	319.8		7.7			327.5
Net assets acquired	4,457.1		21.0			4,478.1
Less merger consideration	7,415.9		—			7,415.9
Goodwill	$	2,958.8	$	(21.0	)	$	2,937.8

(1) The measurement period adjustments reflect changes in the estimated fair values of certain assets and liabilities, primarily related to inventory, contingencies and income taxes.  The measurement period adjustments were recorded to reflect new information obtained about facts and circumstances existing as of the Merger Date and did not result from subsequent intervening events.  These adjustments did not have a material impact on our previously reported financial position or results of operations subsequent to the Merger Date; however, we have retrospectively revised our 2011 consolidated financial statements to reflect these adjustments as if they were recorded on the Merger Date. 

(2) Gross contractual amounts receivable totaled $466.7 million as of the Merger Date.

Goodwill

Goodwill recognized as a result of the Merger was calculated as the excess of the consideration transferred over the net assets acquired and represents the estimated fair value of future economic benefits arising from other intangible assets acquired that could not be individually identified and separately recognized.  Goodwill specifically includes the expected synergies and other benefits from combining the operations of Pride with the operations of Ensco and other intangible assets that do not qualify for separate recognition, such as assembled workforce in place at the Merger Date.  Goodwill is not expected to be tax deductible.

Goodwill recognized as a result of the Merger was allocated to our reportable segments as follows (in millions):

Deepwater	$	2,467.5
Midwater	470.3
Jackup	—
Total	$	2,937.8

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Contingencies

In connection with the Merger, we recognized contingent liabilities resulting from certain lawsuits, claims or proceedings existing as of the Merger Date. These matters existed as of the Merger Date as Pride was involved from time to time as party to governmental or other investigations or proceedings, including matters related to taxation, arising in the ordinary course of business. Although the outcome of such lawsuits or other proceedings cannot be predicted with certainty and the amount of any liability that could arise with respect to such lawsuits or other proceedings cannot be predicted accurately, we do not expect these matters to have a material adverse effect on our financial position, operating results or cash flows.

Deferred Taxes

The Merger was executed through the acquisition of Pride's outstanding common stock and, therefore, the historical tax bases of the acquired assets and assumed liabilities, net operating losses and other tax attributes of Pride were assumed as of the Merger Date. However, adjustments were recorded to recognize deferred tax assets and liabilities for the tax effects of differences between acquisition date fair values and tax bases of assets acquired and liabilities assumed. As of the Merger Date, a decrease to Pride’s net deferred tax liability of $31.6 million was recognized.

Note 3 -Fair Value Measurements

The following fair value hierarchy table categorizes information regarding our financial assets and liabilities measured at fair value on a recurring basis (in millions):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of June 30, 2012
Supplemental executive retirement plan assets	$	28.2	$	—	$	—	$	28.2
Derivatives, net	—		.8		—		.8
Total financial assets	$	28.2	$	.8	$	—	$	29.0
As of December 31, 2011
Hercules Offshore, Inc. common stock	$	32.2	$	—	$	—	$	32.2
Supplemental executive retirement plan assets	25.6		—		—		25.6
Total financial assets	$	57.8	$	—	$	—	$	57.8
Derivatives, net	$	—	$	7.1	$	—	$	7.1
Total financial liabilities	$	—	$	7.1	$	—	$	7.1

Hercules Offshore, Inc. Common Stock

In December 2011, we received 10.3 million shares of Hercules Offshore, Inc. ("HERO") common stock in connection with the resolution of certain litigation in respect of the previously reported Seahawk Drilling, Inc. ("Seahawk") bankruptcy claims. We subsequently sold 3.0 million shares for $13.4 million of net proceeds in December 2011 and sold the remaining 7.3 million shares for $31.6 million of net proceeds in January 2012. 

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During the three-month and six-month periods ended June 30, 2012, in connection with the bankruptcy, we received an additional 280,000 and 1.4 million shares of HERO common stock, which we sold for $1.1 million and $6.1 million during the same periods, respectively. The aforementioned events revealed new information about facts and circumstances in existence as of the Merger Date that, if known at the Merger Date, would have led to a different estimate of the acquired receivable from Seahawk.  Therefore, the impact of the applicable portion of the aforementioned recovery from the Seahawk bankruptcy estate during the second quarter of 2012 was recorded as a retrospective decrease to goodwill and an increase in the acquired receivable from Seahawk as of the Merger Date. As of June 30, 2012, we did not hold any HERO common stock. We designated our investments in HERO common stock as trading securities as it was our intent to sell them in the near-term.  

Supplemental Executive Retirement Plan Assets

Our Ensco supplemental executive retirement plans (the "SERP") are non-qualified plans that accord eligible employees an opportunity to defer a portion of their compensation for use after retirement. Assets held in the SERP were marketable securities measured at fair value on a recurring basis using Level 1 inputs and were included in other assets, net, on our condensed consolidated balance sheets. The fair value measurement of assets held in the SERP was based on quoted market prices.

Derivatives

Our derivatives were measured at fair value on a recurring basis using Level 2 inputs as of June 30, 2012 and December 31, 2011. See "Note 4 - Derivative Instruments" for additional information on our derivatives, including a description of our foreign currency hedging activities and related methodologies used to manage foreign currency exchange rate risk. The fair value measurement of our derivatives was based on market prices generally that are observable for similar assets or liabilities at commonly-quoted intervals.

Other Financial Instruments

The carrying values and estimated fair values of our long-term debt instruments were as follows (in millions):

	June 30, 2012				December 31, 2011
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
4.7% Senior notes due 2021	$	1,473.4	$	1,637.3	$	1,472.2	$	1,565.8
6.875% Senior notes due 2020	1,048.3		1,106.6		1,055.8		1,042.7
3.25% Senior notes due 2016	994.2		1,049.8		993.5		1,016.5
8.5% Senior notes due 2019	624.1		651.7		631.7		615.3
7.875% Senior notes due 2040	384.4		432.1		385.0		381.9
7.2% Debentures due 2027	149.0		188.3		149.0		167.2
4.33% MARAD bonds, including current maturities, due 2016	129.4		130.2		146.7		156.4
6.36% MARAD bonds, including current maturities, due 2015	44.4		49.2		50.7		64.0
4.65% MARAD bonds, including current maturities, due 2020	38.3		44.2		40.5		49.6
Total	$	4,885.5	$	5,289.4	$	4,925.1	$	5,059.4

The estimated fair values of our senior notes and debentures were determined using quoted market prices. The estimated fair values of our Maritime Administration ("MARAD") bonds were determined using an income approach valuation model. The estimated fair values of our cash and cash equivalents, receivables, trade payables and other liabilities approximated their carrying values as of June 30, 2012 and December 31, 2011 generally due to their short-term nature.

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Note 4 -Derivative Instruments

Our functional currency is the U.S. dollar. As is customary in the oil and gas industry, a majority of our revenues are denominated in U.S. dollars; however, a portion of the revenues earned and expenses incurred by some of our subsidiaries are denominated in currencies other than the U.S. dollar ("foreign currencies"). These transactions are remeasured in U.S. dollars based on a combination of both current and historical exchange rates. We use foreign currency forward contracts ("derivatives") to reduce our exposure to various market risks, primarily foreign currency exchange rate risk.

All derivatives were recorded on our condensed consolidated balance sheets at fair value. Accounting for the gains and losses resulting from changes in the fair value of derivatives depends on the use of the derivative and whether it qualifies for hedge accounting.  Net assets of $800,000 and net liabilities of $7.1 million associated with our foreign currency derivatives were included in our condensed consolidated balance sheets as of June 30, 2012 and December 31, 2011, respectively.  All of our derivatives mature during the next 18 months.  See "Note 3 - Fair Value Measurements" for additional information on the fair value measurement of our derivatives.

Derivatives recorded at fair value in our condensed consolidated balance sheets consisted of the following (in millions):

	Derivative Assets				Derivative Liabilities
	June 30, 2012		December 31, 2011		June 30, 2012		December 31, 2011
Derivatives Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	$	2.2	$	.2	$	3.0	$	7.1
Foreign currency forward contracts - non-current(2)	.1		.1		.1		.1
	2.3		.3		3.1		7.2
Derivatives Not Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	1.9		—		.3		.2
	1.9		—		.3		.2
Total	$	4.2	$	.3	$	3.4	$	7.4

(1) Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets.

(2) Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets, net, and other liabilities, respectively, on our condensed consolidated balance sheets.

We utilize cash flow hedges to hedge forecasted foreign currency denominated transactions, primarily to reduce our exposure to foreign currency exchange rate risk associated with contract drilling expenses and capital expenditures denominated in various currencies. As of June 30, 2012, we had cash flow hedges outstanding to exchange an aggregate $305.0 million for various foreign currencies, including $126.3 million for British pounds, $83.9 million for Singapore dollars, $35.8 million for Brazilian reals, $27.6 million for Australian dollars, $25.8 million for euros and $5.6 million for other currencies.

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Gains and losses, net of tax, on derivatives designated as cash flow hedges included in our condensed consolidated statements of income were as follows (in millions):

Three Months Ended June 30, 2012 and 2011

Derivatives Designated as Cash Flow Hedges	Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)					Gain (Loss) Reclassified  from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)					Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(1)
	2012			2011		2012		2011			2012		2011
Interest rate lock contracts(2)	$	—		$	—	$	.1	$	(.2	)	$	—	$	—
Foreign currency forward contracts(3)	(0.1		)	3.1		.7		1.7			1.0		1.1
Total	$	(0.1	)	$	3.1	$	.8	$	1.5		$	1.0	$	1.1

Six Months Ended June 30, 2012 and 2011

Derivatives Designated as Cash Flow Hedges	Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)				Gain (Loss) Reclassified  from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)					Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(1)
	2012		2011		2012		2011			2012		2011
Interest rate lock contracts(2)	$	—	$	—	$	.2	$	(.3	)	$	—	$	—
Foreign currency forward contracts(3)	6.2		6.0		.7		2.6			.2		.7
Total	$	6.2	$	6.0	$	.9	$	2.3		$	.2	$	.7

(1) Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our condensed consolidated statements of income.

(2) Losses on derivatives reclassified from AOCI into income (effective portion) were included in interest expense in our condensed consolidated statements of income.

(3) Gains and losses on derivatives reclassified from AOCI into income (effective portion) were included in contract drilling expense in our condensed consolidated statements of income.

We have net assets and liabilities denominated in numerous foreign currencies and use various methods to manage our exposure to foreign currency exchange rate risk. We predominantly structure our drilling contracts in U.S. dollars, which significantly reduces the portion of our cash flows and assets denominated in foreign currencies. We occasionally enter into derivatives that hedge the fair value of recognized foreign currency denominated assets or liabilities but do not designate such derivatives as hedging instruments.  In these situations, a natural hedging relationship generally exists whereby changes in the fair value of the derivatives offset changes in the fair value of the underlying hedged items. As of June 30, 2012, we held derivatives not designated as hedging instruments to exchange an aggregate $75.5 million for various foreign currencies, including $16.7 million for Swiss francs, $16.3 million for euros, $12.5 million for Australian dollars, $11.2 million for British pounds and $18.8 million for other currencies.

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Net gains of $800,000 and $300,000 associated with our derivatives not designated as hedging instruments were included in other, net, in our condensed consolidated statements of income for the three-month periods ended June 30, 2012 and 2011, respectively. Net gains of $1.7 million and $500,000 associated with our derivatives not designated as hedging instruments were included in other income, net, in our condensed consolidated statements of income for the six-month periods ended June 30, 2012 and 2011, respectively.

As of June 30, 2012, the estimated amount of net losses associated with derivative instruments, net of tax, that would be reclassified to earnings during the next twelve months totaled $700,000.

Note 5 - Share-Based Compensation

During the three-month and six-month periods ended June 30, 2012, we granted 843,000 and 1.0 million restricted share awards and share unit awards to our employees, officers and non-employee directors for annual equity awards and for equity awards granted to new or recently promoted employees, pursuant to our 2012 Long-Term Incentive Plan ("LTIP"). Grants of non-vested share awards and share unit awards generally vest at a rate of 20% per year, as determined by a committee of the Board of Directors. Non-vested share awards and share unit awards granted to certain officers and non-employee directors vest at a rate of 33% per year. Non-vested share awards and share unit awards have dividend rights effective on the date of grant and are measured at fair value using the market value of our shares on the date of grant. The weighted-average grant-date fair value of non-vested share awards and share unit awards granted during the three-month and six-month periods ended June 30, 2012 was $44.63 and $46.75 per share, respectively. Non-vested share award grants primarily were issued out of treasury.

Note 6 - Earnings Per Share

We compute basic and diluted earnings per share ("EPS") in accordance with the two-class method. Net income attributable to Ensco used in our computations of basic and diluted EPS is adjusted to exclude net income allocated to restricted shares and restricted share units granted to our employees and non-employee directors. Weighted-average shares outstanding used in our computation of diluted EPS includes the dilutive effect of share options using the treasury stock method and excludes restricted shares.

The following table is a reconciliation of net income attributable to Ensco shares used in our basic and diluted EPS computations for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Net income attributable to Ensco	$	341.3		$	101.9		$	606.7		$	166.5
Net income allocated to restricted shares	(3.5		)	(1.0		)	(6.2		)	(2.0		)
Net income attributable to Ensco shares	$	337.8		$	100.9		$	600.5		$	164.5

The following table is a reconciliation of the weighted-average shares used in our basic and diluted EPS computations for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions):

	Three Months Ended June 30,		Six Months Ended June 30,
	2012	2011	2012	2011
Weighted-average shares - basic	229.2	169.8	229.0	155.6
Potentially dilutive share options	.2	.4	.3	.3
Weighted-average shares - diluted	229.4	170.2	229.3	155.9

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Antidilutive share options totaling 704,000 and 431,000 were excluded from the computation of diluted EPS for the three-month periods ended June 30, 2012 and 2011, respectively. Antidilutive share options totaling 426,000 and 397,000 were excluded from the computation of diluted EPS for the six-month periods ended June 30, 2012 and 2011, respectively.

Note 7 - Income Taxes

Our consolidated effective income tax rate for the three-month and six-month periods ended June 30, 2012 of 10.5% and 11.0%, respectively, includes the impact of various discrete tax items, the majority of which are attributable to the derecognition of liabilities upon the lapse of the statute of limitations applicable to uncertain tax positions, partially offset by the resolutions of prior period tax matters. Excluding the impact of the aforementioned discrete items, our consolidated effective income tax rate for the three-month and six-month periods ended June 30, 2012 was 11.3% and 11.7%, respectively, compared to a consolidated effective income tax rate, excluding discrete tax items, of 14.6% and 14.7%, respectively, for the three-month and six-month periods ended June 30, 2011. The decrease in the effective tax rate for both periods primarily was attributable to the impact of the Merger and other changes in taxing jurisdictions in which our drilling rigs are operated and/or owned that resulted in an increase in the relative components of our earnings generated in tax jurisdictions with lower tax rates. This was partially offset by the impact of the expiration of the Look-thru Rule for Related Controlled Foreign Corporations under Internal Revenue Code Section 954(c)(6) on December 31, 2011. The Look-thru rule generally excludes from U.S. federal income tax certain dividends, interest, rents and royalties received or accrued by a controlled foreign corporation from a related controlled foreign corporation that would otherwise be taxable pursuant to the Subpart F regime.

Note 8 -Contingencies

ENSCO 74 Loss

In September 2008, ENSCO 74 was lost as a result of Hurricane Ike in the U.S. Gulf of Mexico.  Portions of its legs remained underwater adjacent to the customer's platform, and the sunken rig hull of ENSCO 74 was located approximately 95 miles from the original drilling location when it was struck by an oil tanker in March 2009.  In 2010, wreck removal operations on the sunken rig hull of ENSCO 74 were completed.

In April 2012, we entered into an agreement with the customer pursuant to which, among other matters, the customer agreed to remove the legs, and we agreed to pay $19.0 million in nine installments upon the completion of certain milestones during the removal. The actual removal costs may be less than or greater than the aggregate amount paid to the customer, which will not result in any reduction in the $19.0 million amount paid or additional payments due to the customer from Ensco. We have insurance coverage for the actual removal costs incurred by the customer. A $19.0 million liability and a corresponding receivable for recovery of those costs under our insurance policy was recorded as of June 30, 2012 and included in accrued liabilities and other and other assets, net, on our condensed consolidated balance sheet.

In September 2009, civil litigation was filed alleging that ENSCO 74 caused a pipeline to rupture during Hurricane Ike and seeking damages for the cost of repairs and business interruption in an amount in excess of $26.0 million. In March 2009, the owner of the oil tanker that struck the hull of ENSCO 74 commenced civil litigation against us seeking monetary damages of $10.0 million for losses incurred when the tanker struck the sunken hull of ENSCO 74. Based on information currently available, primarily the adequacy of available defenses, we have not concluded that it is probable liabilities exist with respect to these matters.

We filed a petition for exoneration or limitation of liability under U.S. admiralty and maritime law in September 2009. The petition seeks exoneration from or limitation of liability for any and all injury, loss or damage caused, occasioned or occurred in relation to the ENSCO 74 loss in September 2008. The owner of the tanker that struck the hull of ENSCO 74 and the owners of two subsea pipelines have presented claims in the exoneration/limitation proceedings.  The matter is scheduled for trial in November 2012.

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We have liability insurance policies that provide coverage for claims such as the tanker and pipeline claims as well as removal of wreckage and debris in excess of the property insurance policy sublimit, subject to a $10.0 million per occurrence self-insured retention for third-party claims and an annual aggregate limit of $500.0 million. We believe all liabilities associated with the ENSCO 74 loss during Hurricane Ike resulted from a single occurrence under the terms of the applicable insurance policies. However, legal counsel for certain liability underwriters have asserted that the liability claims arise from separate occurrences. In the event of multiple occurrences, the self-insured retention is $15.0 million for two occurrences and $1.0 million for each occurrence thereafter.

Although we do not expect final disposition of the claims associated with the ENSCO 74 loss to have a material adverse effect upon our financial position, operating results or cash flows, there can be no assurances as to the ultimate outcome.

Asbestos Litigation

We and certain subsidiaries have been named as defendants, along with numerous third-party companies as co-defendants, in multi-party lawsuits filed in Mississippi and Louisiana by approximately 100 plaintiffs. The lawsuits seek an unspecified amount of monetary damages on behalf of individuals alleging personal injury or death, primarily under the Jones Act, purportedly resulting from exposure to asbestos on drilling rigs and associated facilities during the 1960s through the 1980s.

We intend to vigorously defend against these claims and have filed responsive pleadings preserving all defenses and challenges to jurisdiction and venue. However, discovery is still ongoing and, therefore, available information regarding the nature of all pending claims is limited. At present, we cannot reasonably determine how many of the claimants may have valid claims under the Jones Act or estimate a range of potential liability exposure, if any.

In addition to the pending cases in Mississippi and Louisiana, we have other asbestos or lung injury claims pending against us in litigation in other jurisdictions. Although we do not expect the final disposition of these asbestos or lung injury lawsuits to have a material adverse effect upon our financial position, operating results or cash flows, there can be no assurances as to the ultimate outcome of the lawsuits.

Environmental Matters

We currently are subject to pending notices of assessment issued from 2008 to 2012 pursuant to which governmental authorities in Brazil are seeking fines in an aggregate amount of approximately $2.5 million for the release of drilling fluid from drilling rigs operating offshore Brazil.  We are contesting these notices and intend to defend ourselves vigorously.  Although we do not expect the outcome of these assessments to have a material adverse effect on our financial position, operating results or cash flows, there can be no assurance as to the ultimate outcome of these assessments.  A $2.5 million liability related to these matters was recorded as of June 30, 2012.

We currently are subject to a pending administrative proceeding initiated in July 2009 by a governmental authority of Spain pursuant to which such governmental authority is seeking payment in an aggregate amount of approximately $4 million for an alleged environmental spill originating from the ENSCO 5006 while it was operating offshore Spain. Our customer has posted guarantees with the Spanish government to cover potential penalties. Additionally, we expect to be indemnified for any payments resulting from this incident by our customer under the terms of the drilling contract. A criminal investigation of the incident was initiated in July 2010 by a prosecutor in Tarragona, Spain, and the administrative proceedings have been suspended pending the outcome of this investigation.  We do not know at this time what, if any, involvement we may have in this investigation.

We intend to defend ourselves vigorously in the administrative proceeding and any criminal investigation. At this time, we are unable to predict the outcome of these matters or estimate the extent to which we may be exposed to any resulting liability. Although we do not expect the outcome of the proceedings to have a material adverse effect on our financial position, operating results or cash flows, there can be no assurance as to the ultimate outcome of the proceedings.

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Other Matters

In addition to the foregoing, we are named defendants or parties in certain other lawsuits, claims or proceedings incidental to our business and are involved from time to time as parties to governmental investigations or proceedings, including matters related to taxation, arising in the ordinary course of business. Although the outcome of such lawsuits or other proceedings cannot be predicted with certainty and the amount of any liability that could arise with respect to such lawsuits or other proceedings cannot be predicted accurately, we do not expect these matters to have a material adverse effect on our financial position, operating results or cash flows.

Note 9 -Segment Information

Our business consists of three reportable segments: (1) Deepwater, which includes our drillships and semisubmersible rigs capable of drilling in water depths of 4,500 feet or greater, (2) Midwater, which includes our semisubmersible rigs capable of drilling in water depths of 4,499 feet or less and (3) Jackup, which includes all of our independent leg jackup rigs. Each of our three reportable segments provides one service, contract drilling.  We also manage the drilling operations for three deepwater rigs and own one barge rig, which are included in "Other."

Segment information is presented below (in millions). General and administrative expense and depreciation expense incurred by our corporate office are not allocated to our operating segments for purposes of measuring segment operating income and were included in "Reconciling Items."  

Three Months Ended June 30, 2012

	Deepwater		Midwater		Jackup		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	571.8	$	101.4	$	377.6	$	21.2	$	1,072.0	$	—		$	1,072.0
Operating expenses
Contract drilling (exclusive of depreciation)	232.6		64.5		176.5		16.1		489.7		—			489.7
Depreciation	77.8		16.6		42.7		.5		137.6		1.9			139.5
General and administrative	—		—		—		—		—		35.5			35.5
Operating income (loss)	$	261.4	$	20.3	$	158.4	$	4.6	$	444.7	$	(37.4	)	$	407.3
Property and equipment, net	$	9,576.4	$	914.2	$	2,423.7	$	40.2	$	12,954.5	$	29.5		$	12,984.0

Three Months Ended June 30, 2011

	Deepwater		Midwater		Jackup		Other			Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	232.3	$	36.1	$	289.3	$	6.5		$	564.2	$	—		$	564.2
Operating expenses
Contract drilling (exclusive of depreciation)	111.1		22.9		145.4		6.9			286.3		—			286.3
Depreciation	33.9		5.2		43.2		.5			82.8		.7			83.5
General and administrative	—		—		—		—			—		47.4			47.4
Operating income (loss)	$	87.3	$	8.0	$	100.7	$	(.9	)	$	195.1	$	(48.1	)	$	147.0
Property and equipment, net	$	8,774.8	$	910.8	$	2,386.1	$	13.9		$	12,085.6	$	23.2		$	12,108.8

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Six Months Ended June 30, 2012

	Deepwater		Midwater		Jackup		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	1,120.3	$	192.6	$	742.7	$	42.8	$	2,098.4	$	—		$	2,098.4
Operating expenses
Contract drilling (exclusive of depreciation)	492.6		126.5		358.0		32.8		1,009.9		—			1,009.9
Depreciation	154.4		32.4		85.5		1.0		273.3		5.6			278.9
General and administrative	—		—		—		—		—		73.7			73.7
Operating income (loss)	$	473.3	$	33.7	$	299.2	$	9.0	$	815.2	$	(79.3	)	$	735.9
Property and equipment, net	$	9,576.4	$	914.2	$	2,423.7	$	40.2	$	12,954.5	$	29.5		$	12,984.0

Six Months Ended June 30, 2011

	Deepwater		Midwater		Jackup		Other			Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	330.4	$	36.1	$	552.7	$	6.5		$	925.7	$	—		$	925.7
Operating expenses
Contract drilling (exclusive of depreciation)	152.0		22.9		295.7		7.3			477.9		—			477.9
Depreciation	50.1		5.2		85.7		.9			141.9		1.1			143.0
General and administrative	—		—		—		—			—		77.5			77.5
Operating income (loss)	$	128.3	$	8.0	$	171.3	$	(1.7	)	$	305.9	$	(78.6	)	$	227.3
Property and equipment, net	$	8,774.8	$	910.8	$	2,386.1	$	13.9		$	12,085.6	$	23.2		$	12,108.8

Information about Geographic Areas

As of June 30, 2012, the geographic distribution of our drilling rigs by operating segment was as follows:

	Deepwater	Midwater	Jackup	Other	Total(1)
North & South America (excl. Brazil)	6	—	14	—	20
Brazil	6	5	—	—	11
Europe & Mediterranean	1	—	8	—	9
Middle East & Africa	4	1	11	—	16
Asia & Pacific Rim	2	—	11	1	14
Asia & Pacific Rim (under construction)	4	—	3	—	7
Total	23	6	47	1	77

(1) We have three deepwater drilling management contracts not included in the table above.

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Note 10 -Supplemental Financial Information

Consolidated Balance Sheet Information

Accounts receivable, net, consisted of the following (in millions):

	June 30, 2012			December 31, 2011
Trade	$	838.4		$	816.7
Other	30.4			48.6
	868.8			865.3
Allowance for doubtful accounts	(12.5		)	(13.6		)
	$	856.3		$	851.7

Other current assets consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Inventory	$	203.4	$	201.4
Prepaid taxes	85.2		64.9
Deferred mobilization costs	35.4		43.8
Prepaid expenses	24.0		22.3
Deferred tax assets	10.3		9.8
Marketable securities	—		32.2
Other	19.2		24.5
	$	377.5	$	398.9

Other assets, net, consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Intangible assets	$	170.5	$	197.3
Unbilled reimbursable receivables	98.5		119.4
Prepaid taxes on intercompany transfers of property	62.5		68.8
Supplemental executive retirement plan assets	28.2		25.6
Wreckage and debris removal receivables	19.0		19.8
Deferred mobilization costs	17.9		38.4
Deferred tax assets	16.1		25.9
Other	27.0		26.4
	$	439.7	$	521.6

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Accrued liabilities and other consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Personnel costs	$	170.5	$	159.9
Deferred revenue	129.5		111.3
Taxes	99.3		74.0
Accrued interest	68.2		69.4
Wreckage and debris removal	19.0		16.0
Intangible liabilities	—		43.4
Other	53.3		41.7
	$	539.8	$	515.7

Other liabilities consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Intangible liabilities	$	149.0	$	177.8
Deferred revenue	115.4		124.4
Unrecognized tax benefits (inclusive of interest and penalties)	64.1		75.5
Supplemental executive retirement plan liabilities	30.9		30.1
Other	59.9		56.8
	$	419.3	$	464.6

Concentration of Credit Risk

We are exposed to credit risk relating to our receivables from customers, our cash and cash equivalents and investments and our use of derivatives in connection with the management of foreign currency exchange rate risk. We mitigate our credit risk relating to receivables from customers, which consists primarily of major international, government-owned and independent oil and gas companies, by performing ongoing credit evaluations. We also maintain reserves for potential credit losses, which to date have been within management's expectations. We mitigate our credit risk relating to cash and investments by focusing on diversification and quality of instruments. Cash balances are maintained in major, well-capitalized commercial banks. Cash equivalents consist of a portfolio of high-grade instruments. Custody of cash and cash equivalents is maintained at several major financial institutions, and we monitor the financial condition of those financial institutions. We mitigate our credit risk relating to the counterparties of our derivatives by transacting with multiple, high-quality counterparties, thereby limiting exposure to individual counterparties, and by monitoring the financial condition of our counterparties.

During the quarter ended June 30, 2012, Petrobras provided an aggregate $273.0 million, or 25%, of our consolidated revenues, which was attributable to our Deepwater and Midwater segments. During the same period, TOTAL provided an aggregate $94.4 million, or 9%, of our consolidated revenues, which was attributable to our Deepwater segment.

During the six-month period ended June 30, 2012, Petrobras provided an aggregate $531.0 million, or 25%, of our consolidated revenues, which was attributable to our Deepwater and Midwater segments. During the same period, TOTAL provided an aggregate $211.1 million, or 10%, of our consolidated revenues, which was attributable to our Deepwater segment.

22

During the quarter ended June 30, 2012, revenues provided by our drilling operations in Brazil, Angola and the U.S. Gulf of Mexico totaled $270.3 million, or 25%, $141.7 million, or 13%, and $286.5 million, or 27%, respectively, of our consolidated revenues. Of these amounts, 62%, 95% and 70% were provided by our deepwater drilling operations, respectively. 

During the six-month period ended June 30, 2012, revenues provided by our drilling operations in Brazil, Angola and the U.S. Gulf of Mexico totaled $541.7 million, or 26%, $272.9 million, or 13%, and $539.9 million, or 26%, respectively, of our consolidated revenues. Of these amounts, 65%, 95% and 70% were provided by our deepwater drilling operations, respectively. 

Note 11 -Guarantee of Registered Securities

In connection with the Merger, Ensco plc and Pride entered into a supplemental indenture to the indenture dated as of July 1, 2004 between Pride and the Bank of New York Mellon, as indenture trustee, providing for, among other matters, the full and unconditional guarantee by Ensco plc of Pride’s 8.5% unsecured senior notes due 2019, 6.875% unsecured senior notes due 2020 and 7.875% unsecured senior notes due 2040, which had an aggregate outstanding principal balance of $1.7 billion as of June 30, 2012. The Ensco plc guarantee provides for the unconditional and irrevocable guarantee of the prompt payment, when due, of any amount owed to the holders of the notes.

Ensco plc also is a full and unconditional guarantor of the 7.2% debentures due 2027 issued by Ensco Delaware in November 1997, which had an aggregate outstanding principal balance of $150.0 million as of June 30, 2012.

All guarantees are unsecured obligations of Ensco plc ranking equal in right of payment with all of its existing and future unsecured and unsubordinated indebtedness.

The following tables present the condensed consolidating statements of income for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions); the condensed consolidating statements of comprehensive income for the three-month and six-month periods ended June 30, 2012 and 2011; the condensed consolidating balance sheets as of June 30, 2012 and December 31, 2011; and the condensed consolidating statements of cash flows for the six-months ended June 30, 2012 and 2011, in accordance with Rule 3-10 of Regulation S-X.

23

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Three Months Ended June 30, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	5.7		$	64.7		$	—		$	1,110.3		$	(108.7	)	$	1,072.0
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	13.2			64.7			—			520.5			(108.7		)	489.7
Depreciation	.1			.9			—			138.5			—			139.5
General and administrative	13.9			.1			—			21.5			—			35.5
OPERATING INCOME (LOSS)	(21.5		)	(1.0		)	—			429.8			—			407.3
OTHER INCOME (EXPENSE), NET	(8.9		)	(5.6		)	(14.9		)	4.9			—			(24.5		)
INCOME BEFORE INCOME TAXES	(30.4		)	(6.6		)	(14.9		)	434.7			—			382.8
INCOME TAX PROVISION	—			21.7			7.0			11.4						40.1
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	371.7			81.4			97.1			—			(550.2		)	—
NET INCOME	341.3			53.1			75.2			423.3			(550.2		)	342.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.4		)	—			(1.4		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	341.3		$	53.1		$	75.2		$	421.9		$	(550.2	)	$	341.3

24

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Three Months Ended June 30, 2011 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	—		$	—		$	—		$	564.7		$	(.5	)	$	564.2
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	.9			—			—			285.9			(.5		)	286.3
Depreciation	.1			.2			—			83.2			—			83.5
General and administrative	11.5			—			—			35.9			—			47.4
OPERATING INCOME (LOSS)	(12.5		)	(.2		)	—			159.7			—			147.0
OTHER INCOME (EXPENSE), NET	(3.0		)	(.6		)	(3.6		)	(10.9		)	—			(18.1		)
INCOME BEFORE INCOME TAXES	(15.5		)	(.8		)	(3.6		)	148.8			—			128.9
INCOME TAX PROVISION	—			13.7			(1.3		)	12.9			—			25.3
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	117.4			54.7			18.4			—			(190.5		)	—
NET INCOME	101.9			40.2			16.1			135.9			(190.5		)	103.6
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.7		)	—			(1.7		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	101.9		$	40.2		$	16.1		$	134.2		$	(190.5	)	$	101.9

25

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Six Months Ended June 30, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	33.3		$	75.3		$	—		$	2,159.1		$	(169.3	)	$	2,098.4
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	26.1			75.3			—			1,077.8			(169.3		)	1,009.9
Depreciation	.2			1.7			—			277.0			—			278.9
General and administrative	28.5			.1			—			45.1			—			73.7
OPERATING INCOME (LOSS)	(21.5		)	(1.8		)	—			759.2			—			735.9
OTHER INCOME (EXPENSE), NET	(20.1		)	(5.9		)	(26.6		)	1.9			—			(50.7		)
INCOME BEFORE INCOME TAXES	(41.6		)	(7.7		)	(26.6		)	761.1			—			685.2
INCOME TAX PROVISION	—			32.9			7.0			35.2			—			75.1
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	648.3			125.6			176.8			—			(950.7		)	—
NET INCOME	606.7			85.0			143.2			725.9			(950.7		)	610.1
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(3.4		)	—			(3.4		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	606.7		$	85.0		$	143.2		$	722.5		$	(950.7	)	$	606.7

26

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Six Months Ended June 30, 2011 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	—		$	—		$	—		$	926.5		$	(.8	)	$	925.7
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	1.6			—			—			477.1			(.8		)	477.9
Depreciation	.2			.5			—			142.3			—			143.0
General and administrative	24.8			—			—			52.7			—			77.5
OPERATING INCOME (LOSS)	(26.6		)	(.5		)	—			254.4			—			227.3
OTHER INCOME (EXPENSE), NET	.6			(.8		)	(3.6		)	(12.1		)	—			(15.9		)
INCOME BEFORE INCOME TAXES	(26.0		)	(1.3		)	(3.6		)	242.3			—			211.4
INCOME TAX PROVISION	—			19.3			(1.3		)	24.3			—			42.3
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	192.5			120.9			18.4			—			(331.8		)	—
NET INCOME	166.5			100.3			16.1			218.0			(331.8		)	169.1
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(2.6		)	—			(2.6		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	166.5		$	100.3		$	16.1		$	215.4		$	(331.8	)	$	166.5

27

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

Three Months Ended June 30, 2012

(in millions)

	Ensco plc		ENSCO International Incorporated			Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	341.3	$	53.1		$	75.2	$	423.3		$	(550.2	)	$	342.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		(1.0		)	—		.9			—			(.1		)
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		—			—		(.8		)	—			(.8		)
Other	—		—			—		.4			—			.4
NET OTHER COMPREHENSIVE INCOME	—		(1.0		)	—		.5			—			(.5		)
COMPREHENSIVE INCOME	341.3		52.1			75.2		423.8			(550.2		)	342.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—			—		(1.4		)	—			(1.4		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	341.3	$	52.1		$	75.2	$	422.4		$	(550.2	)	$	340.8

28

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

Three Months Ended June 30, 2011

(in millions)

	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	101.9	$	40.2	$	16.1	$	135.9		$	(190.5	)	$	103.6
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		1.2		—		1.9			—			3.1
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		—		—		(1.5		)	—			(1.5		)
Other	—		—		—		—			—			—
NET OTHER COMPREHENSIVE INCOME	—		1.2		—		.4			—			1.6
COMPREHENSIVE INCOME	101.9		41.4		16.1		136.3			(190.5		)	105.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—		—		(1.7		)	—			(1.7		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	101.9	$	41.4	$	16.1	$	134.6		$	(190.5	)	$	103.5

29

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

Six Months Ended June 30, 2012

(in millions)

	Ensco plc		ENSCO International Incorporated			Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	606.7	$	85.0		$	143.2	$	725.9		$	(950.7	)	$	610.1
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		(4.4		)	—		10.6			—			6.2
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		.1			—		(1.0		)	—			(.9		)
Other	—		—			—		(1.5		)	—			(1.5		)
NET OTHER COMPREHENSIVE INCOME	—		(4.3		)	—		8.1			—			3.8
COMPREHENSIVE INCOME	606.7		80.7			143.2		734.0			(950.7		)	613.9
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—			—		(3.4		)	—			(3.4		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	606.7	$	80.7		$	143.2	$	730.6		$	(950.7	)	$	610.5

30

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

Six Months Ended June 30, 2011

(in millions)

	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	166.5	$	100.3	$	16.1	$	218.0		$	(331.8	)	$	169.1
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		3.2		—		2.8			—			6.0
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		.1		—		(2.4		)	—			(2.3		)
Other	—		—		—		—			—			—
NET OTHER COMPREHENSIVE INCOME	—		3.3		—		.4			—			3.7
COMPREHENSIVE INCOME	166.5		103.6		16.1		218.4			(331.8		)	172.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—		—		(2.6		)	—			(2.6		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	166.5	$	103.6	$	16.1	$	215.8		$	(331.8	)	$	170.2

31

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2012 (in millions)
	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco		Consolidating Adjustments			Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	21.7	$	17.7	$	10.4	$	176.9	$	—		$	226.7
Accounts receivable, net	—		7.7		.7		847.9		—			856.3
Accounts receivable from affiliates	1,279.7		166.6		—		1,583.3		(3,029.6		)	—
Other	3.2		32.2		—		342.1		—			377.5
Total current assets	1,304.6		224.2		11.1		2,950.2		(3,029.6		)	1,460.5
PROPERTY AND EQUIPMENT, AT COST	1.8		29.2		—		15,280.8		—			15,311.8
Less accumulated depreciation	.9		21.8		—		2,305.1		—			2,327.8
Property and equipment, net	.9		7.4		—		12,975.7		—			12,984.0
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	2,793.4		3,413.3		751.0		5,245.7		(12,203.4		)	—
INVESTMENTS IN AFFILIATES	12,952.3		3,137.8		4,998.9		—		(21,089.0		)	—
OTHER ASSETS, NET	12.6		79.5		—		347.6		—			439.7
	$	17,063.8	$	6,862.2	$	5,761.0	$	24,793.2	$	(36,322.0	)	$	18,158.2
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	30.7	$	35.7	$	34.2	$	981.1	$	—		$	1,081.7
Accounts payable to affiliates	1,581.1		64.8		.1		1,383.6		(3,029.6		)	—
Short-term debt	22.0		—		—		—		—			22.0
Current maturities of long-term debt	—		—		—		47.5		—			47.5
Total current liabilities	1,633.8		100.5		34.3		2,412.2		(3,029.6		)	1,151.2
DUE TO AFFILIATES	2,022.7		2,623.9		614.5		6,942.3		(12,203.4		)	—
LONG-TERM DEBT	2,467.7		149.0		2,056.8		164.5		—			4,838.0
DEFERRED INCOME TAXES	—		318.2		—		16.1		—			334.3
OTHER LIABILITIES	6.4		7.5		11.6		393.8		—			419.3
ENSCO SHAREHOLDERS' EQUITY	10,933.2		3,663.1		3,043.8		14,857.4		(21,089.0		)	11,408.5
NONCONTROLLING INTERESTS	—		—		—		6.9		—			6.9
Total equity	10,933.2		3,663.1		3,043.8		14,864.3		(21,089.0		)	11,415.4
	$	17,063.8	$	6,862.2	$	5,761.0	$	24,793.2	$	(36,322.0	)	$	18,158.2

32

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2011 (in millions)
	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco		Consolidating Adjustments			Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	236.6	$	—	$	22.6	$	171.5	$	—		$	430.7
Accounts receivable, net	—		.3		5.2		846.2		—			851.7
Accounts receivable from affiliates	1,268.4		89.8		278.2		1,194.5		(2,830.9		)	—
Other	2.8		35.2		46.2		314.7		—			398.9
Total current assets	1,507.8		125.3		352.2		2,526.9		(2,830.9		)	1,681.3
PROPERTY AND EQUIPMENT, AT COST	1.8		30.6		—		14,451.0		—			14,483.4
Less accumulated depreciation	.7		23.8		—		2,037.0		—			2,061.5
Property and equipment, net	1.1		6.8		—		12,414.0		—			12,421.9
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	2,002.3		2,486.9		313.5		3,638.7		(8,441.4		)	—
INVESTMENTS IN AFFILIATES	12,041.9		2,966.0		4,802.6		—		(19,810.5		)	—
OTHER ASSETS, NET	13.9		83.4		9.8		414.5		—			521.6
	$	15,567.0	$	5,668.4	$	5,478.1	$	22,268.1	$	(31,082.8	)	$	17,898.8
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	30.4	$	20.0	$	27.4	$	1,082.3	$	—		$	1,160.1
Accounts payable to affiliates	575.1		606.6		85.2		1,564.0		(2,830.9		)	—
Short-term debt	125.0		—		—		—		—			125.0
Current maturities of long-term debt	—		—		—		47.5		—			47.5
Total current liabilities	730.5		626.6		112.6		2,693.8		(2,830.9		)	1,332.6
DUE TO AFFILIATES	2,191.7		1,058.2		401.3		4,790.2		(8,441.4		)	—
LONG-TERM DEBT	2,465.7		149.0		2,072.5		190.4		—			4,877.6
DEFERRED INCOME TAXES	—		326.8		—		12.7		—			339.5
OTHER LIABILITIES	—		5.2		18.7		440.7		—			464.6
ENSCO SHAREHOLDERS' EQUITY	10,179.1		3,502.6		2,873.0		14,135.1		(19,810.5		)	10,879.3
NONCONTROLLING INTERESTS	—		—		—		5.2		—			5.2
Total equity	10,179.1		3,502.6		2,873.0		14,140.3		(19,810.5		)	10,884.5
	$	15,567.0	$	5,668.4	$	5,478.1	$	22,268.1	$	(31,082.8	)	$	17,898.8

33

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(17.7	)	$	(38.0	)	$	10.9		$	1,055.4		$	—	$	1,010.6
INVESTING ACTIVITIES
Additions to property and equipment	—			1.4			—			(1,048.5		)	—		(1,047.1		)
Proceeds from disposition of assets	—			—			—			57.1			—		57.1
Other	—			—			—			4.5			—		4.5
Net cash (used in) provided by investing activities	—			1.4			—			(986.9		)	—		(985.5		)
FINANCING ACTIVITIES
Cash dividends paid	(173.8		)	—			—			—			—		(173.8		)
Commercial paper borrowings, net	(102.9		)	—			—			—			—		(102.9		)
Reimbursement of equity issuance cost	66.7			—			—			—			—		66.7
Reduction of long-term borrowings	—			—			—			(23.7		)	—		(23.7		)
Advances (to) from affiliates	10.3			42.4			(23.1		)	(29.6		)	—		—
Other	2.5			11.9			—			(11.0		)	—		3.4
Net cash provided by (used in) financing activities	(197.2		)	54.3			(23.1		)	(64.3		)	—		(230.3		)
Effect of exchange rate changes on cash and cash equivalents	—			—			—			1.2			—		1.2
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(214.9		)	17.7			(12.2		)	5.4			—		(204.0		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	236.6			—			22.6			171.5			—		430.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	21.7		$	17.7		$	10.4		$	176.9		$	—	$	226.7

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ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2011 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(47.6	)	$	9.7		$	9.4		$	204.3		$	—	$	175.8
INVESTING ACTIVITIES
Acquisition of Pride International, Inc., net of cash acquired	—			—			92.9			(2,748.9		)	—		(2,656.0		)
Additions to property and equipment	—			(.1		)	(2.5		)	(263.0		)	—		(265.6		)
Proceeds from disposition of assets	—			—			—			44.4			—		44.4
Other	—			—			—			(4.5		)	—		(4.5		)
Net cash (used in) provided by investing activities	—			(.1		)	90.4			(2,972.0		)	—		(2,881.7		)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	2,462.8			—			—			—			—		2,462.8
Reduction of long-term borrowings	—			—			(181.0		)	(8.6		)	—		(189.6		)
Cash dividends paid	(130.7		)	—			—			—			—		(130.7		)
Commercial paper borrowings, net	89.9			—			—			—			—		89.9
Debt financing costs	(23.1		)	(4.7		)	—			(4.0		)	—		(31.8		)
Advances (to) from affiliates	(2,131.5		)	80.2			118.9			1,932.4			—		—
Other	(.7		)	—			—			9.2			—		8.5
Net cash provided by (used in) financing activities	266.7			75.5			(62.1		)	1,929.0			—		2,209.1
Effect of exchange rate changes on cash and cash equivalents	—			—			—			.1			—		.1
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	219.1			85.1			37.7			(838.6		)	—		(496.7		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3.4			19.1			—			1,028.2			—		1,050.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	222.5		$	104.2		$	37.7		$	189.6		$	—	$	554.0

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Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations

Management's Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with the accompanying unaudited consolidated financial statements as of June 30, 2012 and for the three and six months ended June 30, 2012 and 2011 included elsewhere herein, and with our annual report on Form 10-K for the year ended December 31, 2011. The following discussion and analysis contains forward-looking statements that involve risks and uncertainties. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of certain factors, including those set forth under “Risk Factors” in Item 1A of our annual report and elsewhere in this quarterly report. See “Forward-Looking Statements.”

EXECUTIVE SUMMARY

As an industry leader in customer satisfaction, we place significant focus on achieving a safe, zero-incident workplace. Our fleet is the world's second largest amongst competitive rigs, our ultra-deepwater fleet is the newest in the industry and our active premium jackup fleet is the largest of any offshore drilling company. We own and operate an offshore drilling rig fleet of 76 rigs, including rigs under construction. Our rig fleet includes nine deepwater drillships, 20 semisubmersible rigs and 47 independent leg jackups. We currently have three ultra-deepwater drillships, an ultra-deepwater semisubmersible rig and three ultra-premium harsh environment jackup rigs under construction as part of our ongoing strategy to continually expand and high-grade our fleet.

Recent events in the global economy have created uncertainty in regards to global economic growth and commodity prices; however, we remain confident in the long-term prospects for offshore drilling given the expected growth in oil consumption from developing nations, limited growth in crude oil supplies and high depletion rates of mature oil fields, together with geologic successes, improving access to promising offshore areas and new, more efficient technologies, such as enhanced reservoir recovery techniques.

Oil prices generally remained between $90 and $100 per barrel during the second quarter of 2012. If pricing remains stable, we may see increased investment by operators in general, and in the deepwater segment in particular. In response to our long-term view of the strong underlying fundamentals of our industry, we entered into agreements with Samsung Heavy Industries (“SHI”) during the second quarter of 2012 to construct two ultra-deepwater drillships (ENSCO DS-8 and ENSCO DS-9). The rigs are scheduled for delivery during the second half of 2014. A substantial portion of our cash flow has been and will continue to be invested in the expansion and enhancement of our fleet of drilling rigs in general and our newbuild construction in particular. We believe our strong balance sheet, approximately $10.0 billion of contract backlog, $1.9 billion of available revolving credit facilities and our $1.0 billion commercial paper program will enable us to meet the capital expenditure obligations associated with our newbuild rig construction contracts and sustain an adequate level of liquidity during 2012 and beyond.

Our business consists of three reportable segments: (1) Deepwater, which consists of our rigs capable of drilling in water depths of 4,500 feet or greater, (2) Midwater, which consists of our semisubmersible rigs capable of drilling in water depths of 4,499 feet or less and (3) Jackup, which consists of all our independent leg jackup rigs. Each of our three reportable segments provides one service, contract drilling.  We also manage the drilling operations for three deepwater rigs and own one barge rig, which are included in "Other."

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BUSINESS ENVIRONMENT

Deepwater

Deepwater activity remained strong during the second quarter of 2012, with indications of further growth in day rates as fewer rigs remain available. Marketed utilization for deepwater rigs in general remained high at 96% and at 100% for ultra-deepwater rigs in particular.

In South America, Petrobras continued to pursue its program of local newbuild construction in Brazil; however, we may see independent operators becoming more active, which would be a positive development for the ultra-deepwater market in 2013 and 2014. Marketed utilization in Brazil was 100% and the total ultra-deepwater rig count is now at 35, compared to 29 in early 2012. Demand for deepwater drilling also is expected to increase in French Guiana as operators move to assess this new geologic trend.

In the U.S. Gulf of Mexico, where marketed utilization was approximately 95% for deepwater rigs generally and 100% for ultra-deepwater rigs, a number of operators appear to be developing growth plans for the region that would require additional rigs; and, although there were relatively fewer bids on deepwater blocks during a recent lease auction than in prior auctions, the average high bid per acre was significantly higher. Expectations are that a meaningful number of ultra-deepwater rigs may mobilize to the region in the near to intermediate term.

The ultra-deepwater market in West Africa remains fully utilized, with recent day rates exceeding $600,000. Limited near-term rig availability continues to support demand in the area, where deepwater tender activity increased for the fourth straight month in June 2012. Angola, Gabon and Equatorial Guinea continue to generate new drilling opportunities as do new discoveries offshore East Africa. Deepwater activity continued to increase in Asia with demand driven by requirements in Indonesia and Australia, coupled with expectations of future demand growth for deepwater drilling in Brunei.

Worldwide rig supply in the deepwater segment continues to increase as a result of newbuild construction programs.  It has been reported that over 95 newbuild drillships and semisubmersible rigs capable of drilling in water depths of 4,500 feet or greater currently are under construction, 18 of which are scheduled for delivery during the remainder of 2012. The majority of all deepwater newbuild rigs scheduled for delivery are contracted.  Accordingly, we expect newbuild deepwater rigs will be absorbed into the market without a significant effect on utilization and day rates.

If a further increase in contracting of deepwater rigs occurs in the near-term, a slight undersupply may result during 2012 providing upward pressure on utilization and day rates across certain regions, in addition to correlated movements in operating costs.

Midwater

During the second quarter of 2012, the midwater segment remained challenging for long-term work, but short-term contracting was steady, with global marketed utilization at 92%. In the North Sea, marketed utilization was 100%, while utilization in other regions declined during the quarter. Increased strength in the deepwater segment may provide support for declining midwater utilization in certain regions, and the midwater segment may see nominal day rate growth relative to deepwater in the near to intermediate term.

Worldwide rig supply in the midwater segment is not expected to increase significantly in the near-term.  It has been reported that eight newbuild semisubmersible rigs capable of drilling in water depths of 4,499 feet or less are under construction, two of which are scheduled for delivery during the remainder of 2012.  All of the newbuild midwater rigs scheduled for delivery are contracted.  Due to competition with higher specification drilling rigs and the potential oversupply of midwater rigs in certain regions, we expect utilization and day rates to remain under pressure in the near to intermediate term.

Jackup

Jackup activity and day rates during the second quarter of 2012 illustrated slight improvements, with marketed utilization at 93% and evidence of longer-term contracting. In the U.S. Gulf of Mexico, marketed utilization was at 95% and in the North Sea it was at 100%. In the Asia Pacific region, marketed utilization for heavy duty jackups was at 100%, while standard duty jackup marketed utilization was 85%. Additional contracting opportunities exist in Gabon, Nigeria, Cameroon, Cote D'Ivoire and Congo. Day rates could improve if coupled with reduced supply and reduced volatility in oil prices.

Demand recently increased in the Middle East and is expected to continue throughout the remainder of the year, as a result of requirements from Saudi Aramco and a number of other operators in the region. Recent contracting activity, and the expectation of further activity in the near-term, indicates additional support for utilization and day rates.

Demand remained robust for both standard duty and heavy duty jackup rigs in the North Sea. Inquiries have been received for work in the region for 2013 and 2014 as availability remains tight due, in part, to relatively high barriers to entry. Although more drilling rigs may enter the North Sea, we expect upward pressure on utilization and day rates in the near-term.

Demand remained consistent for jackup rigs in the U.S. Gulf of Mexico, and upward pressure on utilization and day rates is expected as new contracts are awarded with longer terms and more rigs depart the region, specifically to Mexico. In Mexico, PEMEX recently reaffirmed its intention to increase its jackup fleet size before the end of the year, although the pace of tendering and contract extensions has slowed. Tender activity in Mexico may increase later in 2012 with some upward pressure expected thereafter on utilization and day rates.

Worldwide rig supply in the jackup segment continues to increase as a result of newbuild construction programs.  It has been reported that over 90 newbuild jackup rigs are under construction, over 25 of which are scheduled for delivery during the remainder of 2012.  More than half of the newbuild jackup rigs scheduled for delivery are contracted.  It is uncertain whether the market in general or any geographic region in particular will be able to fully absorb newbuild jackup rig deliveries in the near-term.

CONVERSION TO CLASS A ORDINARY SHARES

In connection with our redomestication to the U.K. in December 2009, each issued and outstanding share of common stock of Ensco was converted into the right to receive one American depositary share ("ADS"), each representing one Class A ordinary share of Ensco, par value U.S. $0.10 per share. Our ADSs were governed by a deposit agreement with Citibank, N.A. (“Citibank”) as depositary and traded on the New York Stock Exchange (the "NYSE") under the symbol "ESV." Eligibility rules for the S&P 500 Index exclude companies listed in ADS form; therefore, we were removed from the index subsequent to the redomestication.

On May 22, 2012, we terminated our ADS facility and converted our outstanding ADSs into Class A ordinary shares on a one-for-one basis. Our Class A ordinary shares trade on the NYSE under the same symbol “ESV.” 

The conversion was executed in response to favorable regulatory developments involving shares of certain companies domiciled in the U.K. and allows shareholders to directly own and trade our Class A ordinary shares on the NYSE, which is a requirement to be eligible for the S&P 500 Index. However, there is no assurance that we will be added to the index in the future. The conversion did not significantly impact our shareholder rights or our share capital.

In connection with the termination of the ADS facility and the conversion to Class A ordinary shares, our previously executed share repurchase agreements with two investment banks became of no effect by their own terms. Accordingly, our share repurchase program, which provided for the repurchase from time to time, of Ensco’s ADSs in an aggregate amount of up to $562.4 million, ended. The establishment of a new share repurchase program would require approval from our shareholders by special resolution.

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RESULTS OF OPERATIONS

The following table summarizes our condensed consolidated results of operations for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Revenues	$	1,072.0		$	564.2		$	2,098.4		$	925.7
Operating expenses
Contract drilling (exclusive of depreciation)	489.7			286.3			1,009.9			477.9
Depreciation	139.5			83.5			278.9			143.0
General and administrative	35.5			47.4			73.7			77.5
Operating income	407.3			147.0			735.9			227.3
Other expense, net	(24.5		)	(18.1		)	(50.7		)	(15.9		)
Provision for income taxes	40.1			25.3			75.1			42.3
Net income	342.7			103.6			610.1			169.1
Net income attributable to noncontrolling interests	(1.4		)	(1.7		)	(3.4		)	(2.6		)
Net income attributable to Ensco	$	341.3		$	101.9		$	606.7		$	166.5

Excluding an increase of $326.1 million in revenues and $143.2 million in operating income attributable to the impact of the Merger, revenues and operating income increased$181.7 million, or 44%, and $117.1 million, or 105%, respectively, for the quarter ended June 30, 2012 as compared to the prior year quarter. The increase in operating income primarily was due to an increase in utilization and average day rates of our Deepwater segment (inclusive of newbuild additions to the fleet), an increase in utilization of our Jackup segment and general and administrative expense incurred during the prior year quarter to effect the Merger. See below for additional information on our operating results by segment.

Excluding an increase of $787.5 million in revenues and $263.9 million in operating income attributable to the impact of the Merger, revenues and operating income increased$385.2 million, or 50%, and $244.7 million, or 127%, respectively, for the six-month period ended June 30, 2012 as compared to the prior year period. The increase in operating income primarily was due to an increase in utilization and average day rates of our Jackup and Deepwater segments (inclusive of newbuild additions to the fleet). See below for additional information on our operating results by segment.

A significant number of our drilling contracts are of a long-term nature. Accordingly, an increase or decline in demand for contract drilling services generally affects our operating results and cash flows gradually over future quarters as long-term contracts expire and new contracts and/or options are priced at current market rates.

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Rig Counts, Utilization and Average Day Rates

The following table summarizes our offshore drilling rigs by reportable segment and rigs under construction as of June 30, 2012 and 2011:

	2012	2011
Deepwater(1)	19	16
Midwater	6	6
Jackup(2)	44	46
Under construction(1)(3)	7	7
Total	76	75

(1) ENSCO 8505 was delivered in the first quarter of 2012 and commenced drilling operations in the U.S. Gulf of Mexico under a long-term contract in late June 2012. ENSCO DS-6 was delivered in January 2012 and currently is in the shipyard undergoing customer specified upgrades in preparation of its five-year drilling contract, which is expected to commence drilling operations during the fourth quarter of 2012.

ENSCO 8504 was delivered and commenced drilling operations in Brunei during the third quarter of 2011.

(2) We sold ENSCO 59 and ENSCO 61 during the second quarter of 2012.

(3) During the second quarter of 2012, we entered into agreements with SHI to construct our sixth and seventh ultra-deepwater drillships (ENSCO DS-8 and DS-9). The rigs are scheduled for delivery during the second half of 2014.

In October 2011, we entered into an agreement with Keppel FELS Limited ("KFELS") to construct an ultra-high specification harsh environment jackup rig (ENSCO 122). This rig is scheduled for delivery during the second half of 2014.

The following table summarizes our rig utilization and average day rates by reportable segment for the three-month and six-month periods ended June 30, 2012 and 2011:

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Rig Utilization(1)
Deepwater	91		%	86		%	89		%	83		%
Midwater	79		%	79		%	73		%	79		%
Jackup	83		%	75		%	83		%	73		%
Total	85		%	77		%	84		%	75		%
Average Day Rates(2)
Deepwater	$	389,761		$	347,024		$	386,279		$	333,232
Midwater	227,378			237,139			227,350			237,139
Jackup	105,356			99,024			102,363			97,959
Total	$	191,663		$	147,305		$	186,508		$	134,605

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(1) Rig utilization is derived by dividing the number of days under contract by the number of days in the period. Days under contract equals the total number of days that rigs have earned a day rate, including days associated with compensated downtime and mobilizations. For newly constructed or acquired rigs, the number of days in the period begins upon commencement of drilling operations for rigs with a contract or when the rig becomes available for drilling operations for rigs without a contract.

(2) Average day rates are derived by dividing contract drilling revenues, adjusted to exclude certain types of non-recurring reimbursable revenues, lump sum revenues and revenues attributable to amortization of drilling contract intangibles as discussed in Note 2 to our audited consolidated financial statements for the year ended December 31, 2011 included in our annual report on Form 10-K, by the aggregate number of contract days, adjusted to exclude contract days associated with certain mobilizations, demobilizations, shipyard contracts and standby contracts.

Operating Income

Detailed explanations of our operating results, including discussions of revenues, contract drilling expense and depreciation expense by segment, are provided below. General and administrative expense and depreciation expense incurred by our corporate office are not allocated to our operating segments for purposes of measuring segment operating income and were included in "Reconciling Items."

Three Months Ended June 30, 2012

	Deepwater		Midwater		Jackup		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	571.8	$	101.4	$	377.6	$	21.2	$	1,072.0	$	—		$	1,072.0
Operating expenses
Contract drilling (exclusive      of depreciation)	232.6		64.5		176.5		16.1		489.7		—			489.7
Depreciation	77.8		16.6		42.7		.5		137.6		1.9			139.5
General and administrative	—		—		—		—		—		35.5			35.5
Operating income (loss)	$	261.4	$	20.3	$	158.4	$	4.6	$	444.7	$	(37.4	)	$	407.3

Three Months Ended June 30, 2011

	Deepwater		Midwater		Jackup		Other			Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	232.3	$	36.1	$	289.3	$	6.5		$	564.2	$	—		$	564.2
Operating expenses
Contract drilling (exclusive      of depreciation)	111.1		22.9		145.4		6.9			286.3		—			286.3
Depreciation	33.9		5.2		43.2		.5			82.8		.7			83.5
General and administrative	—		—		—		—			—		47.4			47.4
Operating income (loss)	$	87.3	$	8.0	$	100.7	$	(.9	)	$	195.1	$	(48.1	)	$	147.0

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Six Months Ended June 30, 2012

	Deepwater		Midwater		Jackup		Other		Operating Segments Total		Reconciling Items				Consolidated Total
Revenues	$	1,120.3	$	192.6	$	742.7	$	42.8	$	2,098.4	$	—		—	$	2,098.4
Operating expenses
Contract drilling (exclusive of depreciation)	492.6		126.5		358.0		32.8		1,009.9		—			—	1,009.9
Depreciation	154.4		32.4		85.5		1.0		273.3		5.6			—	278.9
General and administrative	—		—		—		—		—		73.7			—	73.7
Operating income (loss)	$	473.3	$	33.7	$	299.2	$	9.0	$	815.2	$	(79.3	)	—	$	735.9

Six Months Ended June 30, 2011

	Deepwater		Midwater		Jackup		Other			Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	330.4	$	36.1	$	552.7	$	6.5		$	925.7	$	—		$	925.7
Operating expenses
Contract drilling (exclusive of depreciation)	152.0		22.9		295.7		7.3			477.9		—			477.9
Depreciation	50.1		5.2		85.7		.9			141.9		1.1			143.0
General and administrative	—		—		—		—			—		77.5			77.5
Operating income (loss)	$	128.3	$	8.0	$	171.3	$	(1.7	)	$	305.9	$	(78.6	)	$	227.3

Deepwater

Excluding an increase of $246.7 million attributable to the impact of the Merger, Deepwater revenues for the quarter ended June 30, 2012 increased by $92.8 million, or 71%, as compared to the prior year quarter, primarily due to ENSCO 8504, which was added to our Deepwater fleet and commenced drilling operations during the third quarter of 2011. Increased utilization, primarily attributable to ENSCO 7500, which commenced drilling operations in Brazil in December 2011 after an enhancement project in the shipyard, and increased average day rates, primarily attributable to ENSCO 8502, which earned a lower special/sublet day rate during the prior year quarter, also led to the increase in revenues for the current quarter. Excluding an increase of $89.8 million attributable to the impact of the Merger, contract drilling expense for the quarter increased by $31.7 million, or 62%, as compared to the prior year quarter, primarily due to the addition of ENSCO 8504 to our Deepwater fleet and idle time incurred by ENSCO 7500 during the prior year quarter as previously noted. The increase in contract drilling expense attributable to the impact of the Merger is net of $22.2 million in warranty claims received during the current quarter. Depreciation expense increased by $6.1 million, or 34%, excluding a $37.8 million increase attributable to the impact of the Merger, primarily due to the addition of ENSCO 8504 to our Deepwater fleet and depreciation on ENSCO 7500 enhancements completed during late 2011.

Excluding an increase of $579.5 million attributable to the impact of the Merger, Deepwater revenues for the six-month period ended June 30, 2012 increased by $210.4 million, or 92%, as compared to the prior year period, primarily due to ENSCO 8504 and ENSCO 8503, which were added to our Deepwater fleet and commenced drilling operations during the third and first quarters of 2011, respectively. Increased utilization, primarily attributable to ENSCO 7500, which commenced drilling operations in Brazil in December 2011 after an enhancement project in the

41

shipyard, and increased average day rates, primarily attributable to ENSCO 8502, which earned a lower special/sublet day rate during the prior year quarter, also led to the increase in revenues. Excluding an increase of $267.5 million attributable to the impact of the Merger, contract drilling expense for the six-month period increased by $73.1 million, or 79%, as compared to the prior year period, primarily due to the commencement of ENSCO 8503 and ENSCO 8504 drilling operations and an increase in utilization associated with ENSCO 7500 as previously noted. The increase in contract drilling expense attributable to the impact of the Merger is net of $22.2 million in warranty claims received during the current period. Depreciation expense increased by $14.0 million, or 41%, excluding a $90.3 millionincrease in expense attributable to the impact of the Merger, primarily due to the addition of ENSCO 8503 and 8504 to our Deepwater fleet and depreciation on ENSCO 7500 enhancements completed during late 2011.

Midwater

Midwater revenues for the three-month and six-month periods ended June 30, 2012 were $101.4 million and $192.6 million, respectively. These revenues were attributable to our Midwater fleet acquired in connection with the Merger, which is comprised of five semisubmersible rigs currently located in Brazil and one semisubmersible rig located in West Africa. For the three-month and six-month periods ended June 30, 2012, utilization of our Midwater fleet was 79% and 73%, respectively, and average day rates were $227,378 and $227,350, respectively. Utilization primarily was impacted by ENSCO 5003, which currently is warm stacked.

Jackup

Excluding a decrease of $600,000 attributable to the impact of the Merger, Jackup revenues for the quarter ended June 30, 2012 increased by $88.9 million, or 32%, as compared to the prior year quarter, primarily due to an increase in utilization to 94% from 77% in the prior year quarter. Increased utilization primarily was attributable to increased drilling activity in the Middle East and Asia Pacific markets. Excluding a decrease of $8.8 million attributable to the impact of the Merger, contract drilling expense for the quarter increased by $39.9 million, or 28%, as compared to the prior year quarter, primarily due to increased utilization, personnel costs and gains associated with the disposal of assets during the prior year quarter. The decline in contract drilling expense attributable to the impact of the Merger includes $13.0 million of gains related to the sale of two jackup rigs. Depreciation expense was comparable to the prior year quarter, excluding an increase of $1.7 million of expense attributable to the impact of the Merger.

Excluding an increase of $15.2 million attributable to the impact of the Merger, Jackup revenues for the six-month period ended June 30, 2012 increased by $174.8 million, or 32%, as compared to the prior year period, primarily due to an increase in utilization to 94% from 74% in the prior year period. Increased utilization primarily was attributable to increased drilling activity in the Middle East, Europe and Asia Pacific markets. Excluding an increase of $5.2 million attributable to the impact of the Merger, contract drilling expense for the six-month period ended June 30, 2012 increased by $57.1 million, or 20%, as compared to the prior year period, primarily due to increased utilization, personnel costs and gains associated with the disposal of assets during the prior year period. The increase in contract drilling expense attributable to the impact of the Merger includes $13.0 million of gains related to the sale of two jackup rigs. Depreciation expense was comparable to the prior year period, excluding an increase of $4.6 million of expense attributable to the impact of the Merger.

Other

Other revenues and contract drilling expense for the three-month and six-month periods ended June 30, 2012 and 2011 were attributable to the managed drilling rig operations we acquired in connection with the Merger.

Reconciling Items

 General and administrative expense for the quarter ended June 30, 2012 decreased by $11.9 million, or 25%, as compared to the prior year quarter, primarily due to professional fees, severance payments and other transaction-related costs associated with the Merger, which totaled $23.0 million in the prior year quarter. Adjusted for these items, general and administrative expense increased approximately $11.1 million, primarily due to a general increase in costs as a result of the Merger.

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General and administrative expense for the six-month period ended June 30, 2012 decreased by $3.8 million, or 5%, as compared to the prior year period, primarily due to professional fees incurred during the prior year period in connection with the Merger, partially offset by a general increase in costs as a result of the Merger and lease termination costs associated with our former U.S. administrative office in Dallas, TX.

Other Income (Expense)

The following table summarizes other income (expense) for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Interest income	$	5.8		$	2.3		$	11.7		$	2.5
Interest expense, net:
Interest expense	(57.6		)	(41.6		)	(115.2		)	(60.1		)
Capitalized interest	27.6			22.0			50.6			36.4
	(30.0		)	(19.6		)	(64.6		)	(23.7		)
Other, net	(.3		)	(.8		)	2.2			5.3
	$	(24.5	)	$	(18.1	)	$	(50.7	)	$	(15.9	)

Interest income for the three-month and six-month periods ended June 30, 2012 increased as compared to the respective prior year periods due to interest earned on certain long-term drilling contracts for reimbursement of mobilization and upgrade costs.  Interest expense increased over the same periods, primarily due to an increase in outstanding debt resulting from $1.9 billion aggregate principal amount of debt assumed in connection with the Merger and, to a lesser extent, our public offering in March 2011 of $2.5 billion aggregate principal amount of senior notes. Interest expense capitalized during the three-month and six-month periods ended June 30, 2012 increased $5.6 million, or 25%, and $14.2 million, or 39%, respectively, as compared to the prior year periods due to the aforementioned factors and increased investments in our newbuild rig construction.

Our functional currency is the U.S. dollar, and a portion of the revenues earned and expenses incurred by certain of our subsidiaries are denominated in currencies other than the U.S. dollar ("foreign currencies"). These transactions are remeasured in U.S. dollars based on a combination of both current and historical exchange rates. Net foreign currency exchange losses of $200,000 and $900,000 were included in other, net, for the three-month and six-month periods ended June 30, 2012, respectively. Net foreign currency exchange losses of $800,000 and $500,000 were included in other, net, for the three-month and six-month periods ended June 30, 2011, respectively.  A net gain of $4.8 million associated with the repurchase of auction rate securities was included in other, net, for the six-month period ended June 30, 2011.

Provision for Income Taxes

Income tax rates imposed in the tax jurisdictions in which our subsidiaries conduct operations vary, as does the tax base to which the rates are applied. In some cases, tax rates may be applicable to gross revenues, statutory or negotiated deemed profits or other bases utilized under local tax laws, rather than to net income. Our drilling rigs frequently move from one taxing jurisdiction to another to perform contract drilling services. In some instances, the movement of drilling rigs among taxing jurisdictions will involve the transfer of ownership of the drilling rigs among our subsidiaries. As a result of the frequent changes in tax law and the taxing jurisdictions in which our drilling rigs are operated and/or owned, our consolidated effective income tax rate may vary substantially from one reporting period to another, depending on the relative components of our earnings generated in tax jurisdictions with higher tax rates or lower tax rates.

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Subsequent to the Merger, we transferred ownership of several acquired drilling rigs among our subsidiaries in June 2011.  Following our redomestication to the U.K. in December 2009, we reorganized our worldwide operations which included the transfer of ownership of several of our drilling rigs among our subsidiaries during 2010 and 2009.

Income tax expense was $40.1 million and $25.3 million for the three-month periods ended June 30, 2012 and 2011, respectively. The $14.8 million increase in income tax expense as compared to the prior year quarter primarily was due to increased profitability, partially offset by a decrease in our consolidated effective income tax rate to 10.5% from 19.6% in the prior year quarter. Our consolidated effective income tax rate for the three-month period ended June 30, 2012 includes the impact of various discrete tax items, the majority of which are attributable to the derecognition of liabilities upon the lapse of the statute of limitations applicable to uncertain tax positions, partially offset by the resolutions of prior period tax matters. Excluding the impact of the aforementioned discrete items, our consolidated effective income tax rate for the three-month period ended June 30, 2012 was 11.3% compared to a consolidated effective income tax rate, excluding discrete tax items, of 14.6% for the three-month period ended June 30, 2011. The decrease primarily was attributable to the impact of the Merger and other changes in taxing jurisdictions in which our drilling rigs are operated and/or owned that resulted in an increase in the relative components of our earnings generated in tax jurisdictions with lower tax rates. This was partially offset by the impact of the expiration of the Look-thru Rule for Related Controlled Foreign Corporations under Internal Revenue Code Section 954(c)(6) on December 31, 2011. The Look-thru rule generally excludes from U.S. federal income tax certain dividends, interest, rents and royalties received or accrued by a controlled foreign corporation from a related controlled foreign corporation that would otherwise be taxable pursuant to the Subpart F regime.

Income tax expense was $75.1 million and $42.3 million for the six-month periods ended June 30, 2012 and 2011, respectively. The $32.8 millionincrease in income tax expense as compared to the prior year quarter primarily was due to increased profitability, partially offset by a decrease in our consolidated effective income tax rate to 11.0% from 20.0% in the prior six-month period. Our consolidated effective income tax rate for the six-month period ended June 30, 2012 includes the impact of various discrete tax items, the majority of which are attributable to the derecognition of liabilities upon the lapse of the statute of limitations applicable to uncertain tax positions, partially offset by the resolutions of prior period tax matters. Excluding the impact of the aforementioned discrete items, our consolidated effective income tax rate for the six-month period ended June 30, 2012 was 11.7% compared to a consolidated effective income tax rate, excluding discrete tax items, of 14.7% for the prior six-month period. The decrease primarily was attributable to the impact of the Merger and other changes in taxing jurisdictions in which our drilling rigs are operated and/or owned that resulted in an increase in the relative components of our earnings generated in tax jurisdictions with lower tax rates, partially offset by the impact of the expiration of the Look-thru Rule for Related Controlled Foreign Corporations under Internal Revenue Code Section 954(c)(6) on December 31, 2011.

LIQUIDITY AND CAPITAL RESOURCES

Although our business is cyclical, we historically have relied on our cash flow from operations to meet liquidity needs and fund the majority of our cash requirements. We have maintained a strong financial position through the disciplined and conservative use of debt, which has provided us the ability to achieve future growth potential through acquisitions and newbuild rig construction. A substantial portion of our cash flow has been invested in the expansion and enhancement of our fleet of drilling rigs in general and our newbuild construction in particular. Given the remaining commitments for our rigs currently under construction and amount of long-term debt outstanding, it is contemplated that our cash flows primarily will be dedicated to finance newbuild construction through 2014 and to service our long-term debt.

During the six-month period ended June 30, 2012, our primary source of cash was $1.0 billion generated from operating activities; $66.7 million from reimbursement of equity issuance costs; and $57.1 million of proceeds from the sale of two jackup rigs and other assets. Our primary use of cash for the same period was $1.0 billion for the construction, enhancement and other improvement of our drilling rigs, including $793.2 million invested in our newbuild construction; $173.8 million for the payment of dividends; $102.9 million for the pay down of our commercial paper program; and $23.7 million for reduction of long-term borrowings.

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During the six-month period ended June 30, 2011, our primary source of cash was $2.5 billion in proceeds from the issuance of our senior notes and $175.8 million generated from operating activities.  Our primary use of cash for the same period was $2.8 billion paid for the cash consideration of the Merger; $265.6 million for the construction, enhancement and other improvement of our drilling rigs, including $136.4 million invested in our newbuild construction; $189.6 million for reduction of long-term borrowings; and $130.7 million for the payment of dividends.

Cash Flow and Capital Expenditures

Our cash flow from operating activities and capital expenditures for the six-month periods ended June 30, 2012 and 2011 were as follows (in millions):

	2012		2011
Cash flow from operating activities	$	1,010.6	$	175.8
Capital expenditures
New rig construction	$	793.2	$	136.4
Rig enhancements	153.5		86.3
Minor upgrades and improvements	100.4		42.9
	$	1,047.1	$	265.6

Cash flow from operating activities increased$834.8 million, or 475%, for the six-month periods ended June 30, 2012 as compared to the prior year period. The increase primarily resulted from a $1.2 billion increase in cash receipts from contract drilling services, a $37.5 million decrease in cash payments related to general and administrative expense, which was primarily attributable to the Merger, and a $8.8 million decline in tax payments. The aforementioned items were partially offset by a $395.8 million increase in cash payments related to contract drilling expenses and a $85.4 million increase in cash payments for net interest. The above fluctuations primarily were attributable to the Merger.

We continue to maintain our long-established strategy of high-grading our jackup rig fleet by investing in newer equipment while expanding the size and quality of our deepwater drilling rig fleet. ENSCO DS-6 was delivered in January 2012 and currently is in a shipyard undergoing customer specified upgrades in preparation of its five-year drilling contract, which is expected to commence drilling operations during the fourth quarter of 2012. ENSCO 8505 was delivered in January 2012 and commenced drilling operations under a long-term contract in the U.S. Gulf of Mexico in late June 2012.

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We have significant contractual commitments related to our newbuild construction agreements. We expect to fund these commitments from our existing cash and cash equivalents, future operating cash flows, funds borrowed under our commercial paper program and, if necessary, funds borrowed under our credit facilities or other future financing arrangements.  The actual timing of our newbuild construction payments may vary based on the completion of various construction milestones, which, to a large extent, are beyond our control.  The following table summarizes the estimated timing of our newbuild construction payments as of June 30, 2012 (in millions):

	Paid		Remainder of 2012		Thereafter		Total(1)
ENSCO DS-7(2)	$	99.6	$	49.8	$	349.3	$	498.7
ENSCO DS-8(3)	53.8		—		484.2		538.0
ENSCO DS-9(3)	52.5		—		472.2		524.7
ENSCO 8506(4)	207.6		332.8		—		540.4
ENSCO 120(5)	43.8		—		175.1		218.9
ENSCO 121(5)	43.8		—		175.1		218.9
ENSCO 122(5)	49.0		—		196.0		245.0
Total	$	550.1	$	382.6	$	1,851.9	$	2,784.6

(1) Total commitments are based on a fixed-price shipyard construction contract, exclusive of costs associated with commissioning, systems integration testing, project management, inventory and other spares.

(2) ENSCO DS-7 currently is uncontracted and under construction and scheduled for delivery during the second half of 2013.

(3) During the second quarter of 2012, we entered into agreements with SHI to construct two ultra-deepwater drillships (ENSCO DS-8 and ENSCO DS-9). The rigs are scheduled for delivery during the second half of 2014.

(4) We have remaining one ENSCO 8500 Series® ultra-deepwater semisubmersible rig under construction with KFELS (ENSCO 8506), which is committed under a long-term contract in the U.S. Gulf of Mexico and scheduled for delivery during the third quarter of 2012.

(5) We have three ultra-high specification harsh environment jackup rigs under construction with KFELS. These rigs are scheduled for delivery during the first and second half of 2013 and the second half of 2014, respectively.  The first jackup rig to be delivered is committed under a long-term drilling contract in the North Sea, while the other two jackup rigs under construction are uncontracted. 

Based on our current projections, we expect capital expenditures during 2012 to include approximately $1.3 billion for newbuild construction, approximately $380 million for rig enhancement projects and approximately $250 million for minor upgrades and improvements. Depending on market conditions and future opportunities, we may make additional capital expenditures to upgrade rigs for customer requirements and construct or acquire additional rigs.

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Financing and Capital Resources

Our total debt, total capital and total debt to total capital ratios are summarized below (in millions, except percentages):

	June 30, 2012			December 31, 2011
Total debt	$	4,907.5		$	5,050.1
Total capital*	$	16,316.0		$	15,929.4
Total debt to total capital	30.1		%	31.7		%

  *Total capital consists of total debt and Ensco shareholders' equity.

Senior Notes

As of June 30, 2012, we had outstanding, and make semiannual interest payments on, $1.0 billion aggregate principal amount of unsecured 3.25% senior notes due 2016, $500.0 million aggregate principal amount of unsecured 8.5% senior notes due 2019, $900.0 million aggregate principal amount of unsecured 6.875% senior notes due 2020, $1.5 billion aggregate principal amount of unsecured 4.7% senior notes due 2021 and $300.0 million aggregate principal amount of unsecured 7.875% senior notes due 2040.

Revolving Credit

We have a $1.45 billion revolving unsecured credit facility with a five-year term, expiring in May 2016, to be used for general corporate purposes and as a backstop to our commercial paper program ("the Five-Year Credit Facility"). Advances under the Five-Year Credit Facility bear interest at LIBOR plus an applicable margin rate (currently 1.5% per annum), depending on our credit rating. We are required to pay a quarterly undrawn facility fee (currently 0.2% per annum) on the total $1.45 billion commitment, which also is based on our credit rating. We also are required to maintain a total debt to total capitalization ratio less than or equal to 50% under the Five-Year Credit Facility. We have the right, subject to lender consent, to increase the commitments under the Five-Year Credit Facility to an aggregate amount of up to $1.7 billion. We had no amounts outstanding under the Five-Year Credit Facility as of June 30, 2012 and December 31, 2011.

We have a $450.0 million revolving unsecured credit facility with a 364-day term, expiring in May 2013, to be used for general corporate purposes and as a backstop to our commercial paper program ("the 364-Day Credit Facility"). Upon our election prior to maturity, amounts outstanding under the 364-Day Credit Facility may be converted into a term loan with a maturity date of May 9, 2013 after payment of a fee equal to 1% of the amounts converted. Advances under the 364-Day Credit Facility bear interest at LIBOR plus an applicable margin rate (currently 1.125% per annum) depending on our credit rating. We are required to pay a quarterly undrawn facility fee (currently 0.09% per annum) on the total $450.0 million commitment. We also are required to maintain a total debt to total capitalization ratio less than or equal to 50% under the 364-Day Credit Facility. We have the right, subject to lender consent, to increase the commitments under the 364-Day Credit Facility to an aggregate amount of up to $550.0 million. We had no amounts outstanding under the 364-Day Credit Facility as of June 30, 2012 and December 31, 2011.

Commercial Paper

We participate in a commercial paper program with four commercial paper dealers pursuant to which we may issue, on a private placement basis, unsecured commercial paper notes up to a maximum aggregate amount outstanding at any time of $1.0 billion. The proceeds of such financings will be used for capital expenditures and other general corporate purposes. The commercial paper will bear interest at rates that will vary based on market conditions and the ratings assigned by credit rating agencies at the time of issuance. The maturities of the commercial paper will vary, but may not exceed 364 days from the date of issuance. The commercial paper is not redeemable or subject to voluntary prepayment by us prior to maturity. We had $22.0 million and $125.0 million outstanding under our commercial paper program as of June 30, 2012 and December 31, 2011, respectively.

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Other Financing

We filed an immediately effective Form S-3 Registration Statement with the Securities and Exchange Commission ("SEC") on January 13, 2012, which provides us the ability to issue debt securities, equity securities, guarantees and/or units of securities in one or more offerings from time to time. The registration statement, as amended, expires in January 2015.

As of June 30, 2012, we had an aggregate $212.1 million outstanding under three separate Maritime Administration bond issues that require semiannual principal and interest payments and are due in 2015, 2016 and 2020, respectively. We also make semiannual interest payments on $150.0 million of 7.2% debentures due in 2027.

In connection with the termination of the ADS facility and the conversion to Class A ordinary shares, our previously executed share repurchase agreements with two investment banks became of no effect by their own terms. Accordingly, our share repurchase program, which provided for the repurchase from time to time, of Ensco’s ADSs in an aggregate amount of up to $562.4 million, ended. The establishment of a new share repurchase program would require approval from our shareholders by special resolution.

Liquidity

Our liquidity position is summarized in the table below (in millions, except ratios):

	June 30, 2012		December 31, 2011
Cash and cash equivalents	$	226.7	$	430.7
Working capital	$	309.3	$	348.7
Current ratio	1.3		1.3

We expect to fund our short-term liquidity needs, including contractual obligations and anticipated capital expenditures, as well as any dividends, share repurchases or working capital requirements, from our operating cash flow and funds borrowed under our commercial paper program and/or 364-Day Credit Facility.

We expect to fund our long-term liquidity needs, including contractual obligations, anticipated capital expenditures and dividends, from our operating cash flow and, if necessary, funds borrowed under our Five-Year Credit Facility or other future financing arrangements. We may decide to access debt and/or equity markets to raise additional capital or increase liquidity as necessary.

Effects of Climate Change and Climate Change Regulation

Greenhouse gas emissions have increasingly become the subject of international, national, regional, state and local attention. Cap and trade initiatives to limit greenhouse gas emissions have been introduced in the European Union. Similarly, various regional, state and local initiatives to limit greenhouse gas emissions have been introduced within the United States, and the United States Environmental Protection Agency has begun to implement regulations related to greenhouse gas emissions. In addition, future regulation of greenhouse gas could occur pursuant to future treaty obligations, statutory or regulatory changes or new climate change legislation in the jurisdictions in which we operate. It is uncertain whether any of these initiatives will be implemented, and, if so, what the scope of the initiatives would be. If such initiatives are implemented, we do not believe that such initiatives would have a direct, material adverse effect on our operating results.

Restrictions on greenhouse gas emissions or other related legislative or regulatory enactments could have an indirect effect in those industries that use significant amounts of petroleum products, which could potentially result in a reduction in demand for petroleum products and, consequently, our offshore contract drilling services. We are currently unable to predict the manner or extent of any such effect. Furthermore, one of the long-term physical effects of climate

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change may be an increase in the severity and frequency of adverse weather conditions, such as hurricanes, which may increase our insurance costs or risk retention, limit insurance availability or reduce the areas in which, or the number of days during which, our customers would contract for our drilling rigs in general and in the U.S. Gulf of Mexico in particular. We are currently unable to predict the manner or extent of any such effect.

MARKET RISK

We use derivatives to reduce our exposure to foreign currency exchange rate risk. Our functional currency is the U.S. dollar. As is customary in the oil and gas industry, a majority of our revenues and expenses are denominated in U.S. dollars; however, a portion of the revenues earned and expenses incurred by certain of our subsidiaries are denominated in currencies other than the U.S. dollar.  We maintain a foreign currency exchange rate risk management strategy that utilizes derivatives to reduce our exposure to unanticipated fluctuations in earnings and cash flows caused by changes in foreign currency exchange rates.  We may employ an interest rate risk management strategy that utilizes derivative instruments to mitigate or eliminate unanticipated fluctuations in earnings and cash flows arising from changes in, and volatility of, interest rates.

We utilize derivatives to hedge forecasted foreign currency denominated transactions, primarily to reduce our exposure to foreign currency exchange rate risk on future expected contract drilling expenses denominated in various foreign currencies.  We have net assets and liabilities denominated in numerous foreign currencies and use various methods to manage our exposure to changes in foreign currency exchange rates. We predominantly structure our drilling contracts in U.S. dollars, which significantly reduces the portion of our cash flows and assets denominated in foreign currencies. We also employ various strategies, including the use of derivatives, to match foreign currency denominated assets with equal or near equal amounts of foreign currency denominated liabilities, thereby minimizing exposure to earnings fluctuations caused by changes in foreign currency exchange rates.

We utilize derivatives and undertake foreign currency exchange rate hedging activities in accordance with our established policies for the management of market risk. We mitigate our credit risk relating to the counterparties of our derivatives by transacting with multiple, high-quality financial institutions, thereby limiting exposure to individual counterparties and by monitoring the financial condition of our counterparties. We do not enter into derivatives for trading or other speculative purposes. We believe that our use of derivatives and related hedging activities reduces our exposure to foreign currency exchange rate risk and interest rate risk and does not expose us to material credit risk or any other material market risk.

As of June 30, 2012, we had derivatives outstanding related to cash flow hedges and derivatives not designated as hedging instruments to exchange an aggregate $380.5 million for various foreign currencies.  If we were to incur a hypothetical 10% adverse change in foreign currency exchange rates, net unrealized losses associated with our foreign currency denominated assets and liabilities and related derivatives as of June 30, 2012 would approximate $17.8 million.  A portion of these unrealized losses generally would be offset by corresponding gains on certain underlying expected future transactions being hedged.  All of our derivatives mature during the next 18 months.  See Note 4 to our condensed consolidated financial statements for additional information on our derivative instruments.

CRITICAL ACCOUNTING POLICIES

The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States of America requires our management to make estimates, judgments and assumptions that affect the amounts reported in our consolidated financial statements and accompanying notes. Our significant accounting policies are included in Note 1 to our audited consolidated financial statements for the year ended December 31, 2011 included in our annual report on Form 10-K filed with the SEC on February 24, 2012. These policies, along with our underlying judgments and assumptions made in their application, have a significant impact on our consolidated financial statements. We identify our critical accounting policies as those that are the most pervasive and important to the portrayal of our financial position and operating results, and that require the most difficult, subjective and/or complex judgments by management regarding estimates in matters that are inherently uncertain. Our critical accounting policies are those related to property and equipment, impairment of long-lived assets and goodwill and income taxes.

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Property and Equipment

As of June 30, 2012, the carrying value of our property and equipment totaled $13.0 billion, which represented 72% of total assets.  This carrying value reflects the application of our property and equipment accounting policies, which incorporate management's estimates, judgments and assumptions relative to the capitalized costs, useful lives and salvage values of our rigs.

We develop and apply property and equipment accounting policies that are designed to appropriately and consistently capitalize those costs incurred to enhance, improve and extend the useful lives of our assets and expense those costs incurred to repair or maintain the existing condition or useful lives of our assets. The development and application of such policies requires estimates, judgments and assumptions by management relative to the nature of, and benefits from, expenditures on our assets. We establish property and equipment accounting policies that are designed to depreciate our assets over their estimated useful lives. The judgments and assumptions used by management in determining the useful lives of our property and equipment reflect both historical experience and expectations regarding future operations, utilization and performance of our assets. The use of different estimates, judgments and assumptions in the establishment of our property and equipment accounting policies, especially those involving the useful lives of our rigs, would likely result in materially different asset carrying values and operating results.

For additional information on the useful lives of our drilling rigs, including an analysis of the impact of various changes in useful life assumptions, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Critical Accounting Policies and Estimates" in Part II of our annual report on Form 10-K for the year ended December 31, 2011.

Impairment of Long-Lived Assets and Goodwill

We evaluate the carrying value of our property and equipment, primarily our drilling rigs, when events or changes in circumstances indicate that the carrying value of such rigs may not be recoverable. Generally, extended periods of idle time and/or inability to contract rigs at economical rates are an indication that a rig may be impaired. However, the offshore drilling industry historically has been highly cyclical, and it is not unusual for rigs to be unutilized or underutilized for significant periods of time and subsequently resume full or near full utilization when business cycles change. Likewise, during periods of supply and demand imbalance, rigs frequently are contracted at or near cash break-even rates for extended periods of time until day rates increase when demand comes back into balance with supply. Impairment situations may arise with respect to specific individual rigs, groups of rigs, such as a specific type of drilling rig, or rigs in a certain geographic location. Our rigs are mobile and generally may be moved from markets with excess supply, if economically feasible. Our drilling rigs are suited for, and accessible to, broad and numerous markets throughout the world.

For property and equipment used in our operations, recoverability generally is determined by comparing the carrying value of an asset to the expected undiscounted future cash flows of the asset. If the carrying value of an asset is not recoverable, the amount of impairment loss is measured as the difference between the carrying value of the asset and its estimated fair value. The determination of expected undiscounted cash flow amounts requires significant estimates, judgments and assumptions, including utilization, day rates, expense levels and capital requirements, as well as cash flows generated upon disposition, for each of our drilling rigs. Due to the inherent uncertainties associated with these estimates, we perform sensitivity analysis on key assumptions as part of our recoverability test.

If the global economy deteriorates and/or other events or changes in circumstances indicate that the carrying value of one or more drilling rigs may not be recoverable, we may conclude that a triggering event has occurred and perform a recoverability test. If, at the time of the recoverability test, management's judgments and assumptions regarding future industry conditions and operations have diminished, it is reasonably possible that we could conclude that one or more of our drilling rigs are impaired.

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We test goodwill for impairment on an annual basis or when events or changes in circumstances indicate that a potential impairment exists. When testing goodwill for impairment, we perform a qualitative assessment to determine whether it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount. Our three reportable segments represent our reporting units. If we determine it is more-likely-than-not that the fair value of a reporting unit exceeds its carrying value after qualitatively assessing the totality of facts and circumstances, its goodwill is considered not impaired.

If the global economy deteriorates and/or our expectations relative to future offshore drilling industry conditions decline, we may conclude that the fair value of one or more of our reporting units has more-likely-than-not declined below its carrying amount and perform a quantitative assessment whereby we estimate the fair value of each reporting unit. In most instances, our calculation of the fair values of our reporting units are based on estimates of future discounted cash flows to be generated by our drilling rigs, which reflect management's judgments and assumptions regarding the appropriate risk-adjusted discount rate, as well as future industry conditions and operations, including expected utilization, day rates, expense levels, capital requirements and terminal values for each of our rigs. Due to the inherent uncertainties associated with these estimates, we perform sensitivity analysis on key assumptions as part of our goodwill impairment test.

If the aggregate fair value of our reporting units exceeds our market capitalization, we evaluate the reasonableness of the implied control premium which includes a comparison to implied control premiums from recent market transactions within our industry or other relevant benchmark data. To the extent that the implied control premium based on the aggregate fair value of our reporting units is not reasonable, we adjust the discount rate used in our discounted cash flow model and reduce the estimated fair values of our reporting units.

If the estimated fair value of a reporting unit exceeds its carrying value, its goodwill is considered not impaired. If the estimated fair value of a reporting unit is less than its carrying value, we estimate the implied fair value of the reporting unit's goodwill. If the carrying amount of the reporting unit's goodwill exceeds the implied fair value of the goodwill, an impairment loss is recognized in an amount equal to such excess. In the event we dispose of drilling rig operations that constitute a business, goodwill would be allocated in the determination of gain or loss on disposal.

Based on our annual goodwill impairment test performed as of December 31, 2011, there was no impairment of goodwill, and none of our reporting units were determined to be at risk of a goodwill impairment in the near-term under the current circumstances.

If the global economy deteriorates and/or our expectations relative to future offshore drilling industry conditions decline, we may conclude that the fair value of one or more of our reporting units has more-likely-than-not declined below its carrying amount and perform an interim period goodwill impairment test. If, at the time of the goodwill impairment test, management's judgments and assumptions regarding future industry conditions and operations have diminished, or if the market value of our shares has declined, we could conclude that the goodwill of one or more of our reporting units has been impaired. It is reasonably possible that the judgments and assumptions inherent in our goodwill impairment test may change in response to future market conditions.

Asset impairment evaluations are, by nature, highly subjective. In most instances, they involve expectations of future cash flows to be generated by our drilling rigs, which reflect management's judgments and assumptions regarding future industry conditions and operations, as well as management's estimates of expected utilization, day rates, expense levels and capital requirements. The estimates, judgments and assumptions used by management in the application of our asset impairment policies reflect both historical experience and an assessment of current operational, industry, market, economic and political environments. The use of different estimates, judgments, assumptions and expectations regarding future industry conditions and operations would likely result in materially different asset carrying values and operating results.

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Income Taxes

We conduct operations and earn income in numerous countries and are subject to the laws of numerous tax jurisdictions. As of June 30, 2012, our condensed consolidated balance sheet included a $315.2 million net deferred income tax liability, a $69.8 million liability for income taxes currently payable and a $64.1 million liability for unrecognized tax benefits, inclusive of interest and penalties.

The carrying values of deferred income tax assets and liabilities reflect the application of our income tax accounting policies and are based on management's estimates, judgments and assumptions regarding future operating results and levels of taxable income. Carryforwards and tax credits are assessed for realization as a reduction of future taxable income by using a more-likely-than-not determination.

We do not provide deferred taxes on the undistributed earnings of our direct or indirect wholly-owned subsidiary of Ensco and immediate parent company of Pride, because our policy and intention is to reinvest such earnings indefinitely or until such time that they can be distributed in a tax-free manner. We do not provide deferred taxes on the undistributed earnings of Ensco Delaware's or Ensco United Incorporated's non-U.S. subsidiaries because our policy and intention is to reinvest such earnings indefinitely.

The carrying values of liabilities for income taxes currently payable and unrecognized tax benefits are based on management's interpretation of applicable tax laws and incorporate management's estimates, judgments and assumptions regarding the use of tax planning strategies in various taxing jurisdictions. The use of different estimates, judgments and assumptions in connection with accounting for income taxes, especially those involving the deployment of tax planning strategies, may result in materially different carrying values of income tax assets and liabilities and operating results.

We operate in many jurisdictions where tax laws relating to the offshore drilling industry are not well developed. In jurisdictions where available statutory law and regulations are incomplete or underdeveloped, we obtain professional guidance and consider existing industry practices before utilizing tax planning strategies and meeting our tax obligations.

Tax returns are routinely subject to audit in most jurisdictions and tax liabilities occasionally are finalized through a negotiation process. While we historically have not experienced significant adjustments to previously recognized tax assets and liabilities as a result of finalizing tax returns, there can be no assurance that significant adjustments will not arise in the future. In addition, there are several factors that could cause the future level of uncertainty relating to our tax liabilities to increase, including the following:

• The Internal Revenue Service and/or Her Majesty's Revenue and Customs may disagree with our interpretation of tax laws, treaties, or regulations with respect to our redomestication to the U.K. in December 2009.

• During recent years, the number of tax jurisdictions in which we conduct operations has increased, and we currently anticipate that this trend may continue. 

• In order to utilize tax planning strategies and conduct operations efficiently, our subsidiaries frequently enter into transactions with affiliates that are generally subject to complex tax regulations and are frequently reviewed by tax authorities. 

• We may conduct future operations in certain tax jurisdictions where tax laws are not well developed, and it may be difficult to secure adequate professional guidance. 

• Tax laws, regulations, agreements and treaties change frequently, requiring us to modify existing tax strategies to conform to such changes. 

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Item 3.   Quantitative and Qualitative Disclosures About Market Risk

Information required under Item 3. has been incorporated into "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations - Market Risk."

Item 4.   Controls and Procedures

Based on their evaluation as of the end of the period covered by this quarterly report on Form 10-Q, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures, as defined in Rule 13a-15 under the Securities and Exchange Act of 1934 (the "Exchange Act"), are effective.

During the fiscal quarter ended June 30, 2012, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II - OTHER INFORMATION

Item 1.   Legal Proceedings

Derivative Cases and Shareholder Class Actions

In April 2010, two purported shareholders of Pride filed separate derivative actions against all of Pride's then-current directors and against Pride, as nominal defendant. The lawsuits, filed in state court in Texas, were consolidated and alleged that the individual defendants breached their fiduciary duties in regards to certain matters involving Pride's previously disclosed investigation under the Foreign Corrupt Practices Act ("FCPA"). Among other remedies, the lawsuit sought damages in an unspecified amount and equitable relief against the individual defendants, along with an award of attorney fees and other costs and expenses to the plaintiff. After the conclusion of Pride's investigation, the plaintiffs filed a consolidated amended petition in January 2011, raising allegations substantially similar to those made in the prior lawsuits.

Following the announcement of the Merger, a number of putative shareholder class action complaints or petitions were filed against various combinations of Pride, Pride's directors, Ensco and certain of our subsidiaries. These lawsuits, filed in the Delaware Chancery Court and in the United States District Court for the Southern District of Texas, challenged the proposed Merger and generally alleged, among other matters, that the individual members of the Pride board of directors breached their fiduciary duties by approving the proposed Merger, failing to take steps to maximize value to Pride's shareholders and failing to disclose material information concerning the proposed Merger in the registration statement on Form S-4; that Pride, Ensco and certain of our subsidiaries aided and abetted such breaches of fiduciary duties; and that the Merger improperly favored Ensco and unduly restricted Pride's ability to negotiate with other bidders. These lawsuits generally sought, among other remedies, compensatory damages, declaratory and injunctive relief concerning the alleged fiduciary breaches, and injunctive relief prohibiting the defendants from consummating the Merger. In addition, the plaintiffs in the derivative class action lawsuits related to Pride's previously disclosed FCPA investigation amended their petition to add claims related to the Merger.

In 2011, we entered into a stipulation of settlement with the plaintiffs in the Delaware cases, under which Pride or its successor agreed not to oppose any application by attorneys for the class for fees and expenses not exceeding $1.1 million. In 2012, the remaining cases were dismissed.

Pride FCPA Investigation

In 2010, Pride and its subsidiaries resolved with the Department of Justice ("DOJ") and the Securities and Exchange Commission ("SEC") its previously disclosed investigations into potential violations of the FCPA.  In connection with the settlements, Pride paid a total of $56.2 million in penalties, disgorgement and interest.

The settlement with the DOJ included a deferred prosecution agreement ("DPA") between Pride and the DOJ and a guilty plea by Pride Forasol, S.A.S., one of Pride's subsidiaries, to FCPA-related charges. Under the DPA, the DOJ agreed to defer the prosecution of certain FCPA-related charges and agreed not to bring any further criminal or civil charges against Pride or any of its subsidiaries related to either any of the conduct set forth in the statement of facts attached to the DPA or any other information disclosed to the DOJ prior to the execution of the DPA. Pride agreed, among other matters, to continue to cooperate with the DOJ, to continue to review and maintain its anti-bribery compliance program and to submit to the DOJ three annual written reports regarding its progress and experience in maintaining and, as appropriate, enhancing its compliance policies and procedures.  In connection with our acquisition of Pride, we agreed to assume the obligations set forth in the DPA. If we comply with the terms of the DPA, the deferred charges against Pride will be dismissed with prejudice. If, during the term of the DPA, the DOJ determines that we have committed a felony under federal law, provided deliberately false information or otherwise breached the DPA, we could be subject to prosecution and penalties for any criminal violation of which the DOJ has knowledge, including the deferred charges.

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In connection with the plea agreement, Pride Forasol S.A.S. was sentenced to pay a criminal fine of $32.6 million and to serve a three-year term of organizational probation. The SEC investigation was resolved in November 2010. Without admitting or denying the allegations in a civil complaint filed by the SEC, Pride consented to the entry of a final judgment ordering disgorgement plus pre-judgment interest totaling $23.6 million and a permanent injunction against future violations of the FCPA.

     In early 2011, Pride received preliminary inquiries from governmental authorities of certain countries referenced in its settlements with the DOJ and SEC. We could face additional fines, sanctions and other penalties from authorities in these and other relevant jurisdictions, including prohibition of our participating in or curtailment of business operations in those jurisdictions and the seizure of our drilling rigs or other assets. At this stage of such inquiries, we are unable to determine what, if any, legal liability may result. Our customers in those jurisdictions could seek to impose penalties or take other actions adverse to our interests. We could also face other third-party claims by directors, officers, employees, affiliates, advisors, attorneys, agents, shareholders, debt holders, or other interest holders or constituents of our company. In addition, disclosure of the subject matter of the investigations and settlements could adversely affect our reputation and our ability to obtain new business or retain existing business from our current customers and potential customers, to attract and retain employees and to access the capital markets.

We cannot currently predict what, if any, actions may be taken by any other applicable government or other authorities or our customers or other third parties or the effect any such actions may have on our financial condition, operating results or cash flows.

Asbestos Litigation

We and certain subsidiaries have been named as defendants, along with numerous third-party companies as co-defendants, in multi-party lawsuits filed in Mississippi and Louisiana by approximately 100 plaintiffs. The lawsuits seek an unspecified amount of monetary damages on behalf of individuals alleging personal injury or death, primarily under the Jones Act, purportedly resulting from exposure to asbestos on drilling rigs and associated facilities during the 1960s through the 1980s.

We intend to vigorously defend against these claims and have filed responsive pleadings preserving all defenses and challenges to jurisdiction and venue. However, discovery is still ongoing and, therefore, available information regarding the nature of all pending claims is limited. At present, we cannot reasonably determine how many of the claimants may have valid claims under the Jones Act or estimate a range of potential liability exposure, if any.

In addition to the pending cases in Mississippi and Louisiana, we have other asbestos or lung injury claims pending against us in litigation in other jurisdictions. Although we do not expect the final disposition of these asbestos or lung injury lawsuits to have a material adverse effect upon our financial position, operating results or cash flows, there can be no assurances as to the ultimate outcome of the lawsuits.

Environmental Matters

We currently are subject to pending notices of assessment issued from 2008 to 2012 pursuant to which governmental authorities in Brazil are seeking fines in an aggregate amount of approximately $2.5 million for the release of drilling fluid from drilling rigs operating offshore Brazil.  We are contesting these notices and intend to defend ourselves vigorously.  Although we do not expect the outcome of these assessments to have a material adverse effect on our financial position, operating results or cash flows, there can be no assurance as to the ultimate outcome of these assessments.  A $2.5 million liability related to these matters was recorded as of June 30, 2012.

We currently are subject to a pending administrative proceeding initiated in July 2009 by a governmental authority of Spain pursuant to which such governmental authority is seeking payment in an aggregate amount of approximately $4 million for an alleged environmental spill originating from the ENSCO 5006 while it was operating offshore Spain. Our customer has posted guarantees with the Spanish government to cover potential penalties.

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Additionally, we expect to be indemnified for any payments resulting from this incident by our customer under the terms of the drilling contract. A criminal investigation of the incident was initiated in July 2010 by a prosecutor in Tarragona, Spain, and the administrative proceedings have been suspended pending the outcome of this investigation.  We do not know at this time what, if any, involvement we may have in this investigation.

We intend to defend ourselves vigorously in the administrative proceeding and any criminal investigation. At this time, we are unable to predict the outcome of these matters or estimate the extent to which we may be exposed to any resulting liability. Although we do not expect the outcome of the proceedings to have a material adverse effect on our financial position, operating results or cash flows, there can be no assurance as to the ultimate outcome of the proceedings.

Other Matters

In addition to the foregoing, we are named defendants or parties in certain other lawsuits, claims or proceedings incidental to our business and are involved from time to time as parties to governmental investigations or proceedings, including matters related to taxation, arising in the ordinary course of business. Although the outcome of such lawsuits or other proceedings cannot be predicted with certainty and the amount of any liability that could arise with respect to such lawsuits or other proceedings cannot be predicted accurately, we do not expect these matters to have a material adverse effect on our financial position, operating results or cash flows.

Item 1A.   Risk Factors 

There are numerous factors that affect our business and results of operations, many of which are beyond our control. In addition to information set forth in this quarterly report, you should carefully read and consider "Item 1A. Risk Factors" in Part I and "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" in Part II of our annual report on Form 10-K for the year ended December 31, 2011, which contains descriptions of significant risks that might cause our actual results of operations in future periods to differ materially from those currently anticipated or expected. Except as set forth below, there have been no material changes from the risks previously disclosed in our annual report on Form 10-K for the year ended December 31, 2011.

We are subject to a number of operating hazards, including those specific tooffshore operations. We may not have insurance to cover all these hazards.

Our operations are subject to hazards inherent in the offshore drilling industry, such as blowouts, reservoir damage, loss of production, loss of well control, uncontained formation pressures, lost or stuck drill strings, equipment failures and mechanical breakdowns, punch throughs, craterings, industrial accidents, fires, explosions, oil spills and pollution. These hazards can cause personal injury or loss of life, severe damage to or destruction of property and equipment, pollution or environmental damage, which could lead to claims by third parties or customers, suspension of operations and contract terminations. Our fleet is also subject to hazards inherent in marine operations, either while on-site or during mobilization, such as capsizing, sinking, grounding, collision, damage from severe weather and marine life infestations.  Additionally, a security breach of our information systems or other technological failure could lead to a material disruption of our operations, information systems, and/or loss of business information, which could result in an adverse impact to our business.  Our drilling contracts provide for varying levels of indemnification from our customers, including with respect to well control and subsurface risks. We also maintain insurance for personal injuries, damage to or loss of equipment and other insurance coverage for various business risks. Our insurance policies typically consist of 12-month policy periods, and the next renewal date for a substantial portion of our insurance program is scheduled for May 31, 2013.

Our insurance program provides coverage, to the extent not otherwise paid by the customer under the indemnification provisions of the drilling contract, for liability due to control-of-well events, liability arising from named windstorms and liability arising from third-party claims, including wrongful death and other personal injury claims by our personnel as well as claims brought on behalf of individuals who are not our employees. Generally, our program provides liability coverage up to $740.0 million, with a retention of $10.0 million or less.

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Control-of-well events generally include an unintended flow from the well that cannot be contained by using equipment on site (e.g., a blowout preventer), by increasing the weight of drilling fluid or by diverting the fluids safely into production. Our program provides coverage for third-party liability claims relating to pollution from a control-of-well event up to $890.0 million per occurrence, with the first $150.0 million of such coverage also covering re-drilling of the well and control-of-well costs. Our program also provides coverage for liability resulting from pollution originating from our rig up to $740.0 million per occurrence. We retain the risk for liability not indemnified by the customer in excess of our insurance coverage. In addition, our insurance program covers only sudden and accidental pollution.

Our insurance program also provides coverage for physical damage to, including total loss or constructive total loss of, our rigs, generally excluding damage arising from a named windstorm in the U.S. Gulf of Mexico. This coverage is based on an agreed amount for each rig, and has a per occurrence deductible for losses ranging from $15.0 million to $25.0 million.  With respect to hull and machinery losses arising from U.S. Gulf of Mexico windstorm damage, we obtained $800.0 million of aggregate coverage for ultra-deepwater drillship and semisubmersible hull and machinery losses with a $50.0 million per occurrence self-insured retention (deductible). However, due to the significant premium, high self-insured retention and limited coverage, we decided not to purchase windstorm insurance for our jackup rigs remaining in the U.S. Gulf of Mexico. Accordingly, we have retained the risk for loss or damage of our 10 jackup rigs remaining in the U.S. Gulf of Mexico arising out of windstorm damage.

Our drilling contracts provide for varying levels of indemnification and allocation of liabilities between our customers and us with respect to loss or damage to property and injury or death to persons arising out of the drilling operations we perform. Under our drilling contracts, liability with respect to personnel and property customarily is assigned on a basis whereby we and our customers assume liability for our respective personnel and property. However, in certain drilling contracts we assume liability for damage to our customers' property and the property of other contractors on the rig resulting from our negligence, subject to negotiated caps per occurrence.  In other contracts, we are not indemnified by our customers for damage to their property and the property of other contractors and, accordingly, could be liable for any such damage under applicable law. In addition, our customers typically indemnify us for damage to our down-hole equipment, and in some cases for all or a limited amount of our subsea equipment, unless the damage is caused by our negligence, generally based on replacement cost minus some level of depreciation.

Our customers typically assume most of the responsibility for and indemnify us from any loss, damage or other liability resulting from pollution or contamination arising from operations under the contract and originating from the well or reservoir, including clean-up and removal, third-party damages, and fines and penalties, including as a result of blow-outs or cratering of the well. In some drilling contracts, however, we may have liability for third-party damages (including punitive damages) resulting from such pollution or contamination caused by our gross negligence, or, in some cases, ordinary negligence, subject to negotiated caps per occurrence and/or for the term of the contract.  In certain contracts, we may not be indemnified by our customers for losses or damages caused by pollution or contamination, and we could be liable for such losses or damages under applicable law and for fines and penalties imposed by regulatory authorities, each of which could be substantial.  In addition, in substantially all of our contracts, the customer assumes responsibility and indemnifies us for loss or damage to the reservoir, for loss of hydrocarbons escaping from the reservoir and for the costs of bringing the well under control.  Further, most of our contracts provide that the customer assumes responsibility and indemnifies us for loss or damage to the well, except when the loss or damage to the well is due to our negligence, in which case most of our contracts provide that the customer's sole remedy is to require us to redrill the lost or damaged portion of the well at a substantially reduced rate.

We generally indemnify the customer for legal and financial consequences of spills of waste oil, fuels, lubricants, motor oils, pipe dope, paint, solvents, ballast, bilge, garbage, debris, sewage, hazardous waste and other liquids the discharge of which originates from our rigs or equipment above the surface of the water and in some cases from our subsea equipment. Some of our contracts provide that, in the event of any such spill from our rigs, we are responsible for fines and penalties.

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The above description of our insurance program and the indemnification provisions of our drilling contracts is only a summary as of the date hereof and is general in nature.  In addition, our drilling contracts are individually negotiated, and the degree of indemnification we receive from operators against the liabilities discussed above can vary from contract to contract, based on market conditions and customer requirements existing when the contract was negotiated.  Notwithstanding a contractual indemnity from a customer, there can be no assurance that our customers will be financially able to indemnify us or will otherwise honor their contractual indemnity obligations.  Our insurance program and the terms of our drilling contracts may change in the future. In addition, the indemnification provisions of our drilling contracts may be subject to differing interpretations, and such provisions may be unenforceable, void or limited by public policy considerations, primarily in situations where the cause of the underlying loss or damage is due to our gross negligence, where punitive damages are attributable to us or where any fines and/or penalties imposed on us for certain conduct are punitive in nature.  The question may ultimately need to be decided by a court or other proceeding taking into consideration the specific contract language, the facts and applicable laws.  The law with respect to the enforceability of indemnities varies from jurisdiction to jurisdiction and is unsettled under certain laws that are applicable to our contracts.

If any of the aforementioned operating hazards results in substantial liability and our insurance and contractual indemnification provisions are unavailable or insufficient, our financial condition, operating results or cash flows may be materially adversely affected.

The potential for U.S. Gulf of Mexico hurricane related windstorm damage or liabilities could result in uninsured losses and may cause us to alter our operating procedures during hurricane season, which could adversely affect our business.

Certain areas in and near the U.S. Gulf of Mexico experience hurricanes and other extreme weather conditions on a relatively frequent basis. Some of our drilling rigs in the U.S. Gulf of Mexico are located in areas that could cause them to be susceptible to damage and/or total loss by these storms, and we have a larger concentration of jackup rigs in the U.S. Gulf of Mexico than most of our competitors. We currently have 10 jackup rigs and six ultra-deepwater rigs in the U.S. Gulf of Mexico. Damage caused by high winds and turbulent seas could result in rig loss or damage, termination of drilling contracts on lost or severely damaged rigs or curtailment of operations on damaged drilling rigs with reduced or suspended day rates for significant periods of time until the damage can be repaired. Moreover, even if our drilling rigs are not directly damaged by such storms, we may experience disruptions in our operations due to damage to our customers' platforms and other related facilities in the area. Our drilling operations in the U.S. Gulf of Mexico have been impacted by hurricanes, including the total loss of one jackup rig during 2004, one platform rig during 2005 and two jackup rigs during 2008, with associated loss of contract revenues and potential liabilities.

Insurance companies incurred substantial losses in the offshore drilling, exploration and production industries as a consequence of hurricanes that occurred in the U.S. Gulf of Mexico during 2004, 2005 and 2008. Accordingly, insurance companies have substantially reduced the nature and amount of insurance coverage available for losses arising from named tropical storm or hurricane damage in the U.S. Gulf of Mexico ("windstorm damage") and have dramatically increased the cost of available windstorm coverage. The tight insurance market not only applies to coverage related to U.S. Gulf of Mexico windstorm damage or loss of our drilling rigs, but also impacts coverage for potential liabilities to third parties associated with property damage, personal injury or death and environmental liabilities as well as coverage for removal of wreckage and debris associated with hurricane losses. We have no assurance that the tight insurance market for windstorm damage, liabilities and removal of wreckage and debris will not continue into the foreseeable future.

Upon renewal of our annual insurance policies effective May 31, 2012, we obtained $800.0 million of aggregate coverage for ultra-deepwater drillship and semisubmersible hull and machinery losses arising from U.S. Gulf of Mexico windstorm damage with a $50.0 million per occurrence self-insured retention (deductible). However, due to the significant premium, high self-insured retention and limited coverage, we decided not to purchase windstorm insurance for our jackup rigs remaining in the U.S. Gulf of Mexico. Accordingly, we have retained the risk for loss or damage of our 10 jackup rigs remaining in the U.S. Gulf of Mexico arising out of windstorm damage.

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Our current liability insurance policies only provide coverage for U.S. Gulf of Mexico windstorm exposures for removal of wreckage and debris in excess of $50.0 million per occurrence as respects our jackup and ultra-deepwater rig operations and have an annual aggregate limit of $450.0 million. Our limited windstorm insurance coverage exposes us to a significant level of risk due to jackup rig damage or loss related to severe weather conditions caused by U.S. Gulf of Mexico hurricanes.

We have established operational procedures designed to mitigate risk to our jackup rigs in the U.S. Gulf of Mexico during hurricane season. In addition to procedures designed to better secure the drilling package on jackup rigs, improve jackup leg stability and increase the air gap to position the hull above waves, our procedures involve analysis of prospective drilling locations, which may include enhanced bottom surveys. These procedures may result in a decision to decline to operate on a customer designated location during hurricane season notwithstanding that the location, water depth and other standard operating conditions are within a rig's normal operating range. Our procedures and the associated regulatory requirements addressing Mobile Offshore Drilling Unit operations in the U.S. Gulf of Mexico during hurricane season, coupled with our decision to retain (self-insure) certain windstorm related risks, may result in a significant reduction in the utilization of our jackup rigs in the U.S. Gulf of Mexico.

Our retained exposures for property loss or damage and wreckage and debris removal or other liabilities associated with U.S. Gulf of Mexico hurricanes could have a material adverse effect on our financial position, operating results and cash flows if we sustain significant uninsured or underinsured losses or liabilities as a result of U.S. Gulf of Mexico hurricanes.

We terminated our American depositary share ("ADS") facility and converted our outstanding ADSs into Class A ordinary shares.There are risks associated with the issuance and trading of our Class A ordinary shares that were not associated with our ADSs.

Generally, stamp duty and/or stamp duty reserve tax ("SDRT") are imposed in the U.K. on certain transfers of chargeable securities (which include shares in companies incorporated in the U.K.) at a rate of 0.5 percent of the consideration paid for the transfer. Certain transfers of shares to depositaries or into clearance systems are charged at a higher rate of 1.5 percent. In connection with the conversion, we entered into arrangements with The Depository Trust Company ("DTC") whereby DTC has accepted our Class A ordinary shares for deposit, book entry and clearing services. The facilities of DTC are widely-used for rapid electronic transfers of securities between participants within the DTC system, which include numerous major international financial institutions and brokerage firms.

We have obtained a favorable ruling from Her Majesty's Revenue and Customs ("HMRC") in respect of the stamp duty and SDRT with respect to the conversion. We entered into this structure in part so that transfers of our shares held in book entry form through DTC will not attract a charge to stamp duty or SDRT in the U.K. A transfer of our shares from within the DTC system out of DTC and any subsequent transfers that occur entirely outside the DTC system will attract a charge to stamp duty at a rate of 0.5 percent of the consideration, which is payable by the transferee of the shares. Any such duty must be paid (and the relevant transfer document stamped by HMRC) before the transfer can be registered in the books of the Company. If those shares are redeposited into DTC, the redeposit will attract stamp duty or SDRT at a rate of 1.5 percent of the value of the shares. We strongly encourage you to hold our Class A ordinary shares in book entry form through the facilities of DTC to mitigate the cost of trading in our shares.

Eligibility for acceptance of foreign securities for deposit, book entry, clearing or other services is at the discretion of DTC and may be revoked by DTC under the terms of our agreement and in accordance with the rules, procedures and bylaws of DTC. A condition for continued eligibility of our shares is that DTC and its affiliates will not be liable for stamp duty or SDRT. We have indemnified DTC for any liability arising from stamp duty or SDRT. The aforementioned favorable ruling from HMRC applies to our arrangement with DTC. Furthermore, following the decision of the First Tier Tribunal (Tax Chamber) in HSBC Holdings plc, The Bank of New York Mellon Corporation v. HMRC 2012 UKFTT 163 (TC) and the announcement by HMRC that it will not seek to appeal the decision, HMRC is not expected to pursue enforcement of stamp duty or SDRT on the issuance of shares into depository receipt or clearance systems such as DTC. However, it is possible that the U.K. government may change or enact law applicable

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to stamp duty or SDRT in response to this decision, which could have a material effect on the cost of trading in our shares. If DTC determines at any time that our shares are not eligible for continued deposit and clearance within its facilities, our shares may become ineligible for continued listing on a U.S. securities exchange or inclusion in the S&P 500, and trading in our Class A ordinary shares would be disrupted. In this event, DTC has agreed it will provide us advance notice and assist us, to the extent possible, with efforts to mitigate adverse consequences. While we would pursue alternative arrangements to preserve our listing and maintain trading, any such disruption could have a material adverse effect on the trading price of our Class A ordinary shares and a resulting adverse effect on our financial position, operating results and/or cash flows.

Item 2.   Unregistered Sales of Equity Securities and Use of Proceeds

The table below provides a summary of our repurchases of our equity securities during the quarter ended June 30, 2012:

Issuer Purchases of Equity Securities
Period	Total Number of Securities Purchased	Average Price Paid per Security		Total Number of Securities Purchased as Part of Publicly Announced Plans or Programs(1)	Approximate Dollar Value of Securities that May Yet Be Purchased Under Plans or Programs(1)
April 1 - April 30	2,511	$	52.98	—	$	—
May 1 - May 31	2,050	$	48.95	—	$	—
June 1 - June 30	120,502	$	45.44	—	$	—
Total	125,063	$	45.61	—

(1) In connection with the termination of the ADS facility and the conversion to Class A ordinary shares, our previously executed share repurchase agreements with two investment banks became of no effect by their own terms. Accordingly, our share repurchase program, which provided for the repurchase from time to time, of Ensco’s ADSs in an aggregate amount of up to $562.4 million, ended. The establishment of a new share repurchase program would require approval from our shareholders by special resolution.

During the quarter ended June 30, 2012, repurchases of our equity securities primarily were made by an affiliated employee benefit trust from employees and non-employee directors in connection with the settlement of income tax withholding obligations arising from the vesting of share awards.  Such securities remain available for reissuance in connection with employee share awards.

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Item 6.   Exhibits

Exhibit Number	Exhibit
3.1	Form of Articles of Association of Ensco International plc (incorporated by reference to Exhibit 99.1 to the Registrant's Current Report on Form 8-K filed on December 16, 2009, File No. 1-8097).
3.2	Certificate of Incorporation on Change of Name to Ensco plc (incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K filed on April 1, 2010, File No. 1-8097).
4.1	Deposit Agreement, Dated as of September 29, 2009, by and among ENSCO International Limited, Citibank, N.A., as Depositary, and the Holders and Beneficial Owners of American Depositary Shares Issued Hereunder (incorporated by reference to Exhibit 4.1 to the Registration Statement of ENSCO International Limited on Form S-4 filed on November 9, 2009, File No. 333-162975).
4.2	Form of American Depositary Receipt for American Depositary Shares representing Deposited Class A Ordinary Shares of Ensco plc (incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K filed on April 1, 2010, File No. 1-8097).
4.3	Letter Agreement, by and among Ensco plc, Citibank, as Depositary, and Computershare, as Exchange Agent for the Termination of Ensco’s ADR Program, dated as of May 14, 2012 (incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
4.4	Form of American Depositary Receipt (incorporated by reference to Exhibit 4.2 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.1	Third Amendment to the ENSCO International Incorporated 2005 Long-Term Incentive Plan (As Revised and Restated on December 22, 2009 and As Assumed by Ensco plc as of December 23, 2009), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.2	2012 Amendment to the ENSCO International Incorporated 1998 Incentive Plan (As Amended on August 23, 2011, and As Assumed by Ensco plc as of December 23, 2009), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.3	Eighth Amendment to the Pride International, Inc. 1993 Directors’ Stock Option Plan (As Assumed by Ensco plc as of May 31, 2011), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.3 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.4	2012 Amendment to the Pride International, Inc. 1998 Long-Term Incentive Plan (As Amended and Restated Effective February 17, 2005 and As Assumed by Ensco plc as of May 31, 2011), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.4 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.5	2012 Amendment to the Pride International, Inc. 2004 Directors’ Stock Incentive Plan (As Amended and Restated Effective March 26, 2008 and As Assumed by Ensco plc as of May 31, 2011), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.5 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.6	2012 Amendment to the Pride International, Inc. 2007 Long-Term Incentive Plan (As Amended and Restated Effective March 16, 2010 and As Assumed by Ensco plc as of May 31, 2011), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.6 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.7	Amendment No. 4 to the Ensco Non-Employee Director Deferred Compensation Plan, dated as of May 14, 2012 (incorporated by reference to Exhibit 10.7 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.8	Amendment No. 5 to the Ensco Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.8 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.9	Amendment No. 5 to the Ensco 2005 Non-Employee Director Deferred Compensation Plan, dated as of May 14, 2012 (incorporated by reference to Exhibit 10.9 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.10	Amendment No. 4 to the Ensco 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.10 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).

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Exhibit Number	Exhibit
10.11	Ensco plc 2012 Long-Term Incentive Plan (incorporated by reference to Annex A to the Company’s Proxy Statement filed on April 4, 2012, File No. 1-8097).
10.12	First Amendment to Third Amended and Restated Credit Agreement and Guaranty Agreement, dated as of May 2, 2012, by and among Ensco plc, ENSCO International Incorporated, ENSCO Universal Limited, ENSCO Offshore International Company, Pride International, Inc., Pride International, Ltd., Ensco Global IV Ltd. and ENSCO Overseas Limited, as Borrowers, Ensco plc, ENSCO International Incorporated, Pride International, Inc., ENSCO Global Limited, ENSCO United Incorporated and ENSCO Investments LLC, as Guarantors, Citibank, N.A., as Administrative Agent, and Citibank, N.A., Deutsche Bank AG New York Branch, Wells Fargo Bank, National Association, DnB Bank ASA, The Bank of Tokyo-Mitsubishi UFJ, Ltd., HSBC Bank USA, National Association, Compass Bank, Natixis, Bank of America, N.A., Lloyds TSB Bank plc, The Bank of Nova Scotia and BNP Paribas, as Banks (incorporated by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2012, File No. 1-8097).
10.13	First Amendment to 364-Day Credit Agreement and Guaranty Agreement, dated as of May 2, 2012 and effective as of May 10, 2012, by and among Ensco plc, ENSCO International Incorporated, ENSCO Universal Limited, ENSCO Offshore International Company, Pride International, Inc., Pride International, Ltd., Ensco Global IV Ltd. and ENSCO Overseas Limited, as Borrowers, Ensco plc, ENSCO International Incorporated, Pride International, Inc., ENSCO Global Limited, ENSCO United Incorporated and ENSCO Investments LLC, as Guarantors, Citibank, N.A., as Administrative Agent, and Citibank, N.A., Deutsche Bank AG New York Branch, Wells Fargo Bank, National Association, DnB Bank ASA, The Bank of Tokyo-Mitsubishi UFJ, Ltd., HSBC Bank USA, National Association, Compass Bank, Natixis, Bank of America, N.A., Lloyds TSB Bank plc, The Bank of Nova Scotia and BNP Paribas, as Banks (incorporated by reference to Exhibit 10.2 to the Registrant’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2012, File No. 1-8097).
*15.1	Letter regarding unaudited interim financial information.
*31.1	Certification of the Chief Executive Officer of Registrant Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification of the Chief Financial Officer of Registrant Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
**32.1	Certification of the Chief Executive Officer of Registrant Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
**32.2	Certification of the Chief Financial Officer of Registrant Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*101.INS	XBRL Instance Document
*101.SCH	XBRL Taxonomy Extension Schema
*101.CAL	XBRL Taxonomy Extension Calculation Linkbase
*101.DEF	XBRL Taxonomy Extension Definition Linkbase
*101.LAB	XBRL Taxonomy Extension Label Linkbase
*101.PRE	XBRL Taxonomy Extension Presentation Linkbase

*   Filed herewith.

** Furnished herewith.

62

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Ensco plc
	/s/ JAMES W. SWENT III
Date:   July 26, 2012	James W. Swent III Executive Vice President and Chief Financial Officer (principal financial officer)
	/s/ MICHAEL B. HOWE
	Michael B. Howe Vice President - Finance (Corporate)
	/s/ DOUGLAS J. MANKO
	Douglas J. Manko Controller (principal accounting officer)

63

INDEX TO EXHIBITS

Exhibit Number	Exhibit
3.1	Form of Articles of Association of Ensco International plc (incorporated by reference to Exhibit 99.1 to the Registrant's Current Report on Form 8-K filed on December 16, 2009, File No. 1-8097).
3.2	Certificate of Incorporation on Change of Name to Ensco plc (incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K filed on April 1, 2010, File No. 1-8097).
4.1	Deposit Agreement, Dated as of September 29, 2009, by and among ENSCO International Limited, Citibank, N.A., as Depositary, and the Holders and Beneficial Owners of American Depositary Shares Issued Hereunder (incorporated by reference to Exhibit 4.1 to the Registration Statement of ENSCO International Limited on Form S-4 filed on November 9, 2009, File No. 333-162975).
4.2	Form of American Depositary Receipt for American Depositary Shares representing Deposited Class A Ordinary Shares of Ensco plc (incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K filed on April 1, 2010, File No. 1-8097).
4.3	Letter Agreement, by and among Ensco plc, Citibank, as Depositary, and Computershare, as Exchange Agent for the Termination of Ensco’s ADR Program, dated as of May 14, 2012 (incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
4.4	Form of American Depositary Receipt (incorporated by reference to Exhibit 4.2 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.1	Third Amendment to the ENSCO International Incorporated 2005 Long-Term Incentive Plan (As Revised and Restated on December 22, 2009 and As Assumed by Ensco plc as of December 23, 2009), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.2	2012 Amendment to the ENSCO International Incorporated 1998 Incentive Plan (As Amended on August 23, 2011, and As Assumed by Ensco plc as of December 23, 2009), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.3	Eighth Amendment to the Pride International, Inc. 1993 Directors’ Stock Option Plan (As Assumed by Ensco plc as of May 31, 2011), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.3 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.4	2012 Amendment to the Pride International, Inc. 1998 Long-Term Incentive Plan (As Amended and Restated Effective February 17, 2005 and As Assumed by Ensco plc as of May 31, 2011), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.4 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.5	2012 Amendment to the Pride International, Inc. 2004 Directors’ Stock Incentive Plan (As Amended and Restated Effective March 26, 2008 and As Assumed by Ensco plc as of May 31, 2011), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.5 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.6	2012 Amendment to the Pride International, Inc. 2007 Long-Term Incentive Plan (As Amended and Restated Effective March 16, 2010 and As Assumed by Ensco plc as of May 31, 2011), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.6 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.7	Amendment No. 4 to the Ensco Non-Employee Director Deferred Compensation Plan, dated as of May 14, 2012 (incorporated by reference to Exhibit 10.7 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.8	Amendment No. 5 to the Ensco Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.8 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.9	Amendment No. 5 to the Ensco 2005 Non-Employee Director Deferred Compensation Plan, dated as of May 14, 2012 (incorporated by reference to Exhibit 10.9 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).

64

Exhibit Number	Exhibit
10.10	Amendment No. 4 to the Ensco 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated as of May 14, 2012 (incorporated by reference to Exhibit 10.10 to the Registrant’s Current Report on Form 8-K filed on May 15, 2012, File No. 1-8097).
10.11	Ensco plc 2012 Long-Term Incentive Plan (incorporated by reference to Annex A to the Company’s Proxy Statement filed on April 4, 2012, File No. 1-8097).
10.12	First Amendment to Third Amended and Restated Credit Agreement and Guaranty Agreement, dated as of May 2, 2012, by and among Ensco plc, ENSCO International Incorporated, ENSCO Universal Limited, ENSCO Offshore International Company, Pride International, Inc., Pride International, Ltd., Ensco Global IV Ltd. and ENSCO Overseas Limited, as Borrowers, Ensco plc, ENSCO International Incorporated, Pride International, Inc., ENSCO Global Limited, ENSCO United Incorporated and ENSCO Investments LLC, as Guarantors, Citibank, N.A., as Administrative Agent, and Citibank, N.A., Deutsche Bank AG New York Branch, Wells Fargo Bank, National Association, DnB Bank ASA, The Bank of Tokyo-Mitsubishi UFJ, Ltd., HSBC Bank USA, National Association, Compass Bank, Natixis, Bank of America, N.A., Lloyds TSB Bank plc, The Bank of Nova Scotia and BNP Paribas, as Banks (incorporated by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2012, File No. 1-8097).
10.13	First Amendment to 364-Day Credit Agreement and Guaranty Agreement, dated as of May 2, 2012 and effective as of May 10, 2012, by and among Ensco plc, ENSCO International Incorporated, ENSCO Universal Limited, ENSCO Offshore International Company, Pride International, Inc., Pride International, Ltd., Ensco Global IV Ltd. and ENSCO Overseas Limited, as Borrowers, Ensco plc, ENSCO International Incorporated, Pride International, Inc., ENSCO Global Limited, ENSCO United Incorporated and ENSCO Investments LLC, as Guarantors, Citibank, N.A., as Administrative Agent, and Citibank, N.A., Deutsche Bank AG New York Branch, Wells Fargo Bank, National Association, DnB Bank ASA, The Bank of Tokyo-Mitsubishi UFJ, Ltd., HSBC Bank USA, National Association, Compass Bank, Natixis, Bank of America, N.A., Lloyds TSB Bank plc, The Bank of Nova Scotia and BNP Paribas, as Banks (incorporated by reference to Exhibit 10.2 to the Registrant’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2012, File No. 1-8097).
*15.1	Letter regarding unaudited interim financial information.
*31.1	Certification of the Chief Executive Officer of Registrant Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification of the Chief Financial Officer of Registrant Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
**32.1	Certification of the Chief Executive Officer of Registrant Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
**32.2	Certification of the Chief Financial Officer of Registrant Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*101.INS	XBRL Instance Document
*101.SCH	XBRL Taxonomy Extension Schema
*101.CAL	XBRL Taxonomy Extension Calculation Linkbase
*101.DEF	XBRL Taxonomy Extension Definition Linkbase
*101.LAB	XBRL Taxonomy Extension Label Linkbase
*101.PRE	XBRL Taxonomy Extension Presentation Linkbase

 *   Filed herewith.

** Furnished herewith.

65

EX-15.1

July 26, 2012

Ensco plc

London, England

Re: Registration Statements on Form S-8 (Nos. 333-174611, 333-58625, 33-40282, 333-97757, 333-125048, 333-156530, and 333-181593) and on Form S-3 (No. 333-179021)

With respect to the subject registration statements, we acknowledge our awareness of the use therein of our report dated July 26, 2012 related to our review of interim financial statements.

Pursuant to Rule 436 under the Securities Act of 1933 (the Act), such report is not considered part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.

/s/ KPMG LLP

Houston, Texas

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Daniel W. Rabun, certify that:

1. I have reviewed this report on Form 10-Q for the fiscal quarter ending June 30, 2012 of Ensco plc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated:  July 26, 2012

/s/Daniel W. Rabun

Daniel W. Rabun

Chairman, President and

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, James W. Swent III, certify that:

1. I have reviewed this report on Form 10-Q for the fiscal quarter ending June 30, 2012 of Ensco plc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated:  July 26, 2012

/s/ James W. Swent III

James W. Swent III

Executive Vice President and

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Ensco plc (the "Company") on Form 10-Q for the period ending June 30, 2012 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Daniel W. Rabun, Chairman, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002 (the "Act"), that: 

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 (the "Exchange Act"); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/Daniel W. Rabun

Daniel W. Rabun

Chairman, President and

Chief Executive Officer

Dated:  July 26, 2012

The foregoing certification is being furnished solely pursuant to § 906 of the Act and Rule 13a-14(b) promulgated under the Exchange Act and is not being filed as part of the Report or as a separate disclosure document.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Ensco plc (the "Company") on Form 10-Q for the period ending June 30, 2012 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, James W. Swent III, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002 (the "Act"), that: 

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 (the "Exchange Act"); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ James W. Swent III

James W. Swent III

Executive Vice President and

Chief Financial Officer

Dated:  July 26, 2012

The foregoing certification is being furnished solely pursuant to § 906 of the Act and Rule 13a-14(b) promulgated under the Exchange Act and is not being filed as part of the Report or as a separate disclosure document.

XML

Segment Information (Narrative) (Details)	6 Months Ended
	Jun. 30, 2012 rigs
Segment Reporting Information [Line Items]
Number of segments (in segments)	3
Deepwater [Member] | Other [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	3
Barge Rig [Member] | Other [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	1
Minimum [Member] | Deepwater [Member]
Segment Reporting Information [Line Items]
Rigs drilling capacity (in feet)	4,500
Maximum [Member] | Midwater [Member]
Segment Reporting Information [Line Items]
Rigs drilling capacity (in feet)	4,499

XML

Guarantee Of Registered Securities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012
Guarantor Obligations [Line Items]
Senior notes aggregate outstanding principal balance	1,700.0
8.50% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	8.50%
Senior note, maturity year	2019
6.875% Senior Notes due 2020 [Member]
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	6.875%
Senior note, maturity year	2020
7.875% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	7.875%
Senior note, maturity year	2040
7.20% Debentures Due 2027 [Member]
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	7.20%
Senior note, maturity year	2027
Senior notes aggregate outstanding principal balance	150.0

XML

Supplemental Financial Information (Accrued Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Supplemental Financial Information [Abstract]
Personnel costs	$ 170.5	$ 159.9
Deferred revenue	129.5	111.3
Taxes	99.3	74.0
Accrued interest	68.2	69.4
Wreckage and debris removal	19.0	16.0
Intangible liabilities	0	43.4
Other	53.3	41.7
Accrued liabilities and other	$ 539.8	$ 515.7

XML

Derivative Instruments (Gains And Losses On Derivatives Designated As Cash Flow Hedges) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Interest Rate Lock Contracts [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)	$ 0	[1]	$ 0	[1]	$ 0	[2]	$ 0	[2]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	0.1	[1]	(0.2)	[1]	0.2	[1]	(0.3)	[1]
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	[1],[3]	0	[1],[3]	0	[2],[3]	0	[2],[3]
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)	(0.1)	[2]	3.1	[2]	6.2	[2]	6.0	[2]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	0.7	[2]	1.7	[2]	0.7	[2]	2.6	[2]
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	1.0	[2],[3]	1.1	[2],[3]	0.2	[2],[3]	0.7	[2],[3]
Cash Flow Hedges [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)	(0.1)		3.1		6.2		6.0
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	0.8		1.5		0.9		2.3
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ 1.0	[3]	$ 1.1	[3]	$ 0.2	[3]	$ 0.7	[3]

[1] Losses on derivatives reclassified from AOCI into income (effective portion) were included in interest expense in our condensed consolidated statements of income.

[2] Gains and losses on derivatives reclassified from AOCI into income (effective portion) were included in contract drilling expense in our condensed consolidated statements of income.

[3] Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our condensed consolidated statements of income.

XML

Acquisition Of Pride International, Inc. (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Business Combinations [Abstract]
Recognized net deferred tax liability	$ 31.6

XML

Guarantee Of Registered Securities Guarantee Of Registered Securities (Condensed Consolidating Statements of Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
NET INCOME	$ 342.7	$ 103.6	$ 610.1	$ 169.1
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	(0.1)	3.1	6.2	6.0
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income	(0.8)	(1.5)	(0.9)	(2.3)
Other	0.4	0	(1.5)	0
Net other comprehensive income (loss)	(0.5)	1.6	3.8	3.7
COMPREHENSIVE INCOME	342.2	105.2	613.9	172.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4)	(1.7)	(3.4)	(2.6)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	340.8	103.5	610.5	170.2
Ensco Plc [Member]
NET INCOME	341.3	101.9	606.7	166.5
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	341.3	101.9	606.7	166.5
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	341.3	101.9	606.7	166.5
ENSCO International Inc. [Member]
NET INCOME	53.1	40.2	85.0	100.3
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	(1.0)	1.2	(4.4)	3.2
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income			0.1	0.1
Net other comprehensive income (loss)	(1.0)	1.2	(4.3)	3.3
COMPREHENSIVE INCOME	52.1	41.4	80.7	103.6
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	52.1	41.4	80.7	103.6
Pride International, Inc. [Member]
NET INCOME	75.2	16.1	143.2	16.1
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	75.2	16.1	143.2	16.1
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	75.2	16.1	143.2	16.1
Other Non-Guarantor Subsidiaries Of Ensco [Member]
NET INCOME	423.3	135.9	725.9	218.0
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	0.9	1.9	10.6	2.8
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income	(0.8)	(1.5)	(1.0)	(2.4)
Other	0.4	0	(1.5)
Net other comprehensive income (loss)	0.5	0.4	8.1	0.4
COMPREHENSIVE INCOME	423.8	136.3	734.0	218.4
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4)	(1.7)	(3.4)	(2.6)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	422.4	134.6	730.6	215.8
Consolidating Adjustments [Member]
NET INCOME	(550.2)	(190.5)	(950.7)	(331.8)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	(550.2)	(190.5)	(950.7)	(331.8)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$ (550.2)	$ (190.5)	$ (950.7)	$ (331.8)

XML

Supplemental Financial Information Supplemental Financial Information (Narrative) (Details) (Sales Revenue, Services, Net [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
US Gulf Of Mexico [Member] | Geographic Concentration Risk [Member]
Revenues	$ 286.5	$ 539.9
Concentration Risk, Percentage	27.00%	26.00%
US Gulf Of Mexico [Member] | Deepwater [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage	70.00%	70.00%
Brazil [Member] | Geographic Concentration Risk [Member]
Revenues	270.3	541.7
Concentration Risk, Percentage	25.00%	26.00%
Brazil [Member] | Deepwater [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage	95.00%	95.00%
Angola [Member] | Geographic Concentration Risk [Member]
Revenues	141.7	272.9
Concentration Risk, Percentage	13.00%	13.00%
Angola [Member] | Deepwater [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage	62.00%	65.00%
Petrobras [Member] | Deepwater And Midwater [Member] | Product Concentration Risk [Member]
Revenues	273.0	531.0
Concentration Risk, Percentage	25.00%	25.00%
Total [Member] | Deepwater [Member] | Product Concentration Risk [Member]
Revenues	$ 94.4	$ 211.1
Concentration Risk, Percentage	9.00%	10.00%

XML

Income Taxes (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Consolidated effective income tax rate including tax expense attributable to prior periods	10.50%		11.00%
Consolidated effective income tax rate, without tax expense attributable to prior periods	11.30%	14.60%	11.70%	14.70%

XML

Guarantee Of Registered Securities (Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	$ 1,010.6	$ 175.8
INVESTING ACTIVITIES
Acquisition of Pride International, Inc., net of cash acquired	0	(2,656.0)
Additions to property and equipment	(1,047.1)	(265.6)
Proceeds from disposition of assets	57.1	44.4
Other	4.5	(4.5)
Net cash used in investing activities	(985.5)	(2,881.7)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	0	2,462.8
Cash dividends paid	(173.8)	(130.7)
Debt financing costs	0	(31.8)
Commercial paper borrowings, net	(102.9)	89.9
Reimbursement of equity issuance cost	66.7	(0.6)
Reduction of long-term borrowings	(23.7)	(189.6)
Other	3.4	8.5
Net cash (used in) provided by financing activities	(230.3)	2,209.1
Effect of exchange rate changes on cash and cash equivalents	1.2	0.1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(204.0)	(496.7)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	430.7	1,050.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	226.7	554.0
Ensco Plc [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(17.7)	(47.6)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes		2,462.8
Cash dividends paid	(173.8)	(130.7)
Debt financing costs		(23.1)
Commercial paper borrowings, net	(102.9)	89.9
Reimbursement of equity issuance cost	66.7
Advances (to) from affiliates	10.3	(2,131.5)
Other	2.5	(0.7)
Net cash (used in) provided by financing activities	(197.2)	266.7
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(214.9)	219.1
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	236.6	3.4
CASH AND CASH EQUIVALENTS, END OF PERIOD	21.7	222.5
ENSCO International Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(38.0)	9.7
INVESTING ACTIVITIES
Additions to property and equipment	1.4	(0.1)
Net cash used in investing activities	1.4	(0.1)
FINANCING ACTIVITIES
Advances (to) from affiliates	42.4	80.2
Other	11.9
Net cash (used in) provided by financing activities	54.3	75.5
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	17.7	85.1
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		19.1
CASH AND CASH EQUIVALENTS, END OF PERIOD	17.7	104.2
Pride International, Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	10.9	9.4
INVESTING ACTIVITIES
Acquisition of Pride International, Inc., net of cash acquired		92.9
Additions to property and equipment		(2.5)
Net cash used in investing activities		90.4
FINANCING ACTIVITIES
Reduction of long-term borrowings		(181.0)
Advances (to) from affiliates	(23.1)	118.9
Net cash (used in) provided by financing activities	(23.1)	(62.1)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(12.2)	37.7
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	22.6
CASH AND CASH EQUIVALENTS, END OF PERIOD	10.4	37.7
Other Non-Guarantor Subsidiaries Of Ensco [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	1,055.4	204.3
INVESTING ACTIVITIES
Acquisition of Pride International, Inc., net of cash acquired		(2,748.9)
Additions to property and equipment	(1,048.5)	(263.0)
Proceeds from disposition of assets	57.1	44.4
Other	4.5	(4.5)
Net cash used in investing activities	(986.9)	(2,972.0)
FINANCING ACTIVITIES
Reduction of long-term borrowings	(23.7)	(8.6)
Advances (to) from affiliates	(29.6)	1,932.4
Other	(11.0)	9.2
Net cash (used in) provided by financing activities	(64.3)	1,929.0
Effect of exchange rate changes on cash and cash equivalents	1.2	0.1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	5.4	(838.6)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	171.5	1,028.2
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 176.9	$ 189.6

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Supplemental Financial Information (Other Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Supplemental Financial Information [Abstract]
Intangible liabilities	$ 149.0	$ 177.8
Deferred revenue	115.4	124.4
Unrecognized tax benefits (inclusive of interest and penalties)	64.1	75.5
Supplemental executive retirement plan liabilities	30.9	30.1
Other	59.9	56.8
Other liabilities	$ 419.3	$ 464.6

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Fair Value Measurements

6 Months Ended

Jun. 30, 2012

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The following fair value hierarchy table categorizes information regarding our financial assets and liabilities measured at fair value on a recurring basis (in millions):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of June 30, 2012
Supplemental executive retirement plan assets	$	28.2	$	—	$	—	$	28.2
Derivatives, net	—		.8		—		.8
Total financial assets	$	28.2	$	.8	$	—	$	29.0
As of December 31, 2011
Hercules Offshore, Inc. common stock	$	32.2	$	—	$	—	$	32.2
Supplemental executive retirement plan assets	25.6		—		—		25.6
Total financial assets	$	57.8	$	—	$	—	$	57.8
Derivatives, net	$	—	$	7.1	$	—	$	7.1
Total financial liabilities	$	—	$	7.1	$	—	$	7.1

Hercules Offshore, Inc. Common Stock

In December 2011, we received 10.3 million shares of Hercules Offshore, Inc. ("HERO") common stock in connection with the resolution of certain litigation in respect of the previously reported Seahawk Drilling, Inc. ("Seahawk") bankruptcy claims. We subsequently sold 3.0 million shares for $13.4 million of net proceeds in December 2011 and sold the remaining 7.3 million shares for $31.6 million of net proceeds in January 2012. 

During the three-month and six-month periods ended June 30, 2012, in connection with the bankruptcy, we received an additional 280,000 and 1.4 million shares of HERO common stock, which we sold for $1.1 million and $6.1 million during the same periods, respectively. The aforementioned events revealed new information about facts and circumstances in existence as of the Merger Date that, if known at the Merger Date, would have led to a different estimate of the acquired receivable from Seahawk.  Therefore, the impact of the applicable portion of the aforementioned recovery from the Seahawk bankruptcy estate during the second quarter of 2012 was recorded as a retrospective decrease to goodwill and an increase in the acquired receivable from Seahawk as of the Merger Date. As of June 30, 2012, we did not hold any HERO common stock. We designated our investments in HERO common stock as trading securities as it was our intent to sell them in the near-term.  

Supplemental Executive Retirement Plan Assets

Our Ensco supplemental executive retirement plans (the "SERP") are non-qualified plans that accord eligible employees an opportunity to defer a portion of their compensation for use after retirement. Assets held in the SERP were marketable securities measured at fair value on a recurring basis using Level 1 inputs and were included in other assets, net, on our condensed consolidated balance sheets. The fair value measurement of assets held in the SERP was based on quoted market prices.

Derivatives

Our derivatives were measured at fair value on a recurring basis using Level 2 inputs as of June 30, 2012 and December 31, 2011. See "Note 4 - Derivative Instruments" for additional information on our derivatives, including a description of our foreign currency hedging activities and related methodologies used to manage foreign currency exchange rate risk. The fair value measurement of our derivatives was based on market prices generally that are observable for similar assets or liabilities at commonly-quoted intervals.

Other Financial Instruments

The carrying values and estimated fair values of our long-term debt instruments were as follows (in millions):

	June 30, 2012				December 31, 2011
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
4.7% Senior notes due 2021	$	1,473.4	$	1,637.3	$	1,472.2	$	1,565.8
6.875% Senior notes due 2020	1,048.3		1,106.6		1,055.8		1,042.7
3.25% Senior notes due 2016	994.2		1,049.8		993.5		1,016.5
8.5% Senior notes due 2019	624.1		651.7		631.7		615.3
7.875% Senior notes due 2040	384.4		432.1		385.0		381.9
7.2% Debentures due 2027	149.0		188.3		149.0		167.2
4.33% MARAD bonds, including current maturities, due 2016	129.4		130.2		146.7		156.4
6.36% MARAD bonds, including current maturities, due 2015	44.4		49.2		50.7		64.0
4.65% MARAD bonds, including current maturities, due 2020	38.3		44.2		40.5		49.6
Total	$	4,885.5	$	5,289.4	$	4,925.1	$	5,059.4

The estimated fair values of our senior notes and debentures were determined using quoted market prices. The estimated fair values of our Maritime Administration ("MARAD") bonds were determined using an income approach valuation model. The estimated fair values of our cash and cash equivalents, receivables, trade payables and other liabilities approximated their carrying values as of June 30, 2012 and December 31, 2011 generally due to their short-term nature.

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Supplemental Financial Information (Accounts Receivable, Net) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	$ 868.8	$ 865.3
Allowance for doubtful accounts	(12.5)	(13.6)
Accounts receivable, net	856.3	851.7
Trade [Member]
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	838.4	816.7
Other [Member]
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	$ 30.4	$ 48.6

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Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Supplemental executive retirement plan assets	$ 28.2	$ 25.6
Derivatives, net	0.8
Total financial assets	29.0	57.8
Hercules Offshore, Inc. common stock		32.2
Derivatives, net		7.1
Total Financial Liabilities		7.1
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Supplemental executive retirement plan assets	28.2	25.6
Derivatives, net	0
Total financial assets	28.2	57.8
Hercules Offshore, Inc. common stock		32.2
Derivatives, net		0
Total Financial Liabilities		0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Supplemental executive retirement plan assets	0	0
Derivatives, net	0.8
Total financial assets	0.8	0
Hercules Offshore, Inc. common stock		0
Derivatives, net		7.1
Total Financial Liabilities		7.1
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Supplemental executive retirement plan assets	0	0
Derivatives, net	0
Total financial assets	0	0
Hercules Offshore, Inc. common stock		0
Derivatives, net		0
Total Financial Liabilities		$ 0

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Fair Value Measurements (Narrative) (Details) (Hercules Offshore Inc [Member], USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended		3 Months Ended	6 Months Ended
	Jan. 31, 2012	Dec. 31, 2011	Jun. 30, 2012	Jun. 30, 2012
Hercules Offshore Inc [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common stock received in litigation of bankruptcy claims (in shares)		10,300,000	280,000	1,400,000
Common stock, shares sold (in shares)		3,000,000
Proceeds from sales of HERO common stock		$ 13.4	$ 1.1	$ 6.1
Remaining common shares sold (in shares)	7,300,000
Net proceeds received from issuance of remaining common shares	$ 31.6

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Supplemental Financial Information (Other Current Assets) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Supplemental Financial Information [Abstract]
Inventory	$ 203.4	$ 201.4
Prepaid taxes	85.2	64.9
Deferred mobilization costs	35.4	43.8
Prepaid expenses	24.0	22.3
Deferred tax assets	10.3	9.8
Marketable securities	0	32.2
Other	19.2	24.5
Other current assets	$ 377.5	$ 398.9

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Fair Value Measurements (Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	$ 4,885.5	$ 4,925.1
Estimated Fair Value	5,289.4	5,059.4
4.70% Senior Notes [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	1,473.4	1,472.2
Estimated Fair Value	1,637.3	1,565.8
Debt instrument, interest rate, stated percentage	4.70%	4.70%
6.875% Senior Notes due 2020 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	1,048.3	1,055.8
Estimated Fair Value	1,106.6	1,042.7
Debt instrument, interest rate, stated percentage	6.875%	6.875%
3.25% Senior Notes [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	994.2	993.5
Estimated Fair Value	1,049.8	1,016.5
Debt instrument, interest rate, stated percentage	3.25%	3.25%
8.50% Senior Notes [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	624.1	631.7
Estimated Fair Value	651.7	615.3
Debt instrument, interest rate, stated percentage	8.50%	8.50%
7.875% Senior Notes [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	384.4	385.0
Estimated Fair Value	432.1	381.9
Debt instrument, interest rate, stated percentage	7.875%	7.875%
7.20% Debentures [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	149.0	149.0
Estimated Fair Value	188.3	167.2
Debt instrument, interest rate, stated percentage	7.20%	7.20%
4.33% MARAD Bonds, Including Current Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	129.4	146.7
Estimated Fair Value	130.2	156.4
Debt instrument, interest rate, stated percentage	4.33%	4.33%
6.36% MARAD Bonds, Including Current Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	44.4	50.7
Estimated Fair Value	49.2	64.0
Debt instrument, interest rate, stated percentage	6.36%	6.36%
4.65% MARAD Bonds, Including Current Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Carrying Value	38.3	40.5
Estimated Fair Value	$ 44.2	$ 49.6
Debt instrument, interest rate, stated percentage	4.65%	4.65%

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Derivative Instruments (Narrative) (Details) (USD $)	6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012	Dec. 31, 2010	Jun. 30, 2012 Not Designated [Member]	Jun. 30, 2011 Not Designated [Member]	Jun. 30, 2012 Not Designated [Member]	Jun. 30, 2011 Not Designated [Member]	Jun. 30, 2012 Foreign Exchange [Member] Cash Flow Hedges [Member]	Jun. 30, 2012 Foreign Exchange [Member] Not Designated [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net assets associated with foreign currency derivatives	$ 800,000
Net liabilities associated with foreign currency derivatives		7,100,000
Maturity period of derivatives (in months)	18 months
Aggregate cash flow hedges outstanding							305,000,000	75,500,000
Cash flow hedges outstanding for British pounds							126,300,000	11,200,000
Cash flow hedges outstanding for Singapore dollars							83,900,000
Cash flow hedges outstanding for Brazilian reals							35,800,000
Cash flow hedges outstanding for Swiss francs								16,700,000
Cash flow hedges outstanding for Australian dollars							27,600,000	12,500,000
Cash flow hedges outstanding for euros							25,800,000	16,300,000
Cash flow hedges outstanding for other currencies							5,600,000	18,800,000
Net gains on derivatives not designated as hedging instruments			800,000	300,000	1,700,000	500,000
Estimated amount of net gains associated with derivative instruments, net of tax	$ 700,000

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Acquisition Of Pride International, Inc.

6 Months Ended

Jun. 30, 2012

Business Combinations [Abstract]

Acquisition Of Pride International, Inc.

Acquisition of Pride International, Inc.

Assets Acquired and Liabilities Assumed

The Merger was accounted for using the acquisition method of accounting, which requires that assets acquired and liabilities assumed be recorded at their estimated fair values as of the Merger Date. The excess of the consideration transferred over the estimated fair values of the net assets acquired was recorded as goodwill. We have finalized the determination of the fair values of the assets acquired and liabilities assumed as set forth below. The acquired assets and assumed liabilities were subject to adjustment during a one-year measurement period subsequent to the Merger Date as permitted under GAAP.  The estimated fair values of certain assets and liabilities, primarily inventory, taxes and contingencies, required judgments and assumptions that resulted in adjustments made to these estimates during the measurement period.  

The provisional amounts recognized at the Merger Date, respective measurement period adjustments and final estimated fair values recorded for assets acquired and liabilities assumed were as follows:

	Amounts Recognized as of Merger Date		Measurement Period Adjustments(1)			Estimated Fair Value
Assets:
Cash and cash equivalents	$	147.0	$	—		$	147.0
Accounts receivable(2)	371.3		38.1			409.4
Other current assets	150.9		32.7			183.6
Property and equipment	6,758.8		(9.4		)	6,749.4
Other assets	343.7		27.8			371.5
Liabilities:
Accounts payable and accrued liabilities and other	539.8		60.6			600.4
Debt	2,436.0		—			2,436.0
Deferred income tax liabilities	19.0		(.1		)	18.9
Other liabilities	319.8		7.7			327.5
Net assets acquired	4,457.1		21.0			4,478.1
Less merger consideration	7,415.9		—			7,415.9
Goodwill	$	2,958.8	$	(21.0	)	$	2,937.8

(1) The measurement period adjustments reflect changes in the estimated fair values of certain assets and liabilities, primarily related to inventory, contingencies and income taxes.  The measurement period adjustments were recorded to reflect new information obtained about facts and circumstances existing as of the Merger Date and did not result from subsequent intervening events.  These adjustments did not have a material impact on our previously reported financial position or results of operations subsequent to the Merger Date; however, we have retrospectively revised our 2011 consolidated financial statements to reflect these adjustments as if they were recorded on the Merger Date. 

(2) Gross contractual amounts receivable totaled $466.7 million as of the Merger Date.

Goodwill

Goodwill recognized as a result of the Merger was calculated as the excess of the consideration transferred over the net assets acquired and represents the estimated fair value of future economic benefits arising from other intangible assets acquired that could not be individually identified and separately recognized.  Goodwill specifically includes the expected synergies and other benefits from combining the operations of Pride with the operations of Ensco and other intangible assets that do not qualify for separate recognition, such as assembled workforce in place at the Merger Date.  Goodwill is not expected to be tax deductible.

Goodwill recognized as a result of the Merger was allocated to our reportable segments as follows (in millions):

Deepwater	$	2,467.5
Midwater	470.3
Jackup	—
Total	$	2,937.8

Contingencies

In connection with the Merger, we recognized contingent liabilities resulting from certain lawsuits, claims or proceedings existing as of the Merger Date. These matters existed as of the Merger Date as Pride was involved from time to time as party to governmental or other investigations or proceedings, including matters related to taxation, arising in the ordinary course of business. Although the outcome of such lawsuits or other proceedings cannot be predicted with certainty and the amount of any liability that could arise with respect to such lawsuits or other proceedings cannot be predicted accurately, we do not expect these matters to have a material adverse effect on our financial position, operating results or cash flows.

Deferred Taxes

The Merger was executed through the acquisition of Pride's outstanding common stock and, therefore, the historical tax bases of the acquired assets and assumed liabilities, net operating losses and other tax attributes of Pride were assumed as of the Merger Date. However, adjustments were recorded to recognize deferred tax assets and liabilities for the tax effects of differences between acquisition date fair values and tax bases of assets acquired and liabilities assumed. As of the Merger Date, a decrease to Pride’s net deferred tax liability of $31.6 million was recognized.

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Derivative Instruments (Schedule Of Derivatives At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Derivative [Line Items]
Total fair value of derivative assets	$ 4.2		$ 0.3
Total fair value of derivative liabilities	3.4		7.4
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Total fair value of derivative assets	2.3		0.3
Total fair value of derivative liabilities	3.1		7.2
Designated As Hedging Instrument [Member] | Foreign Currency Forward Contracts - Current [Member]
Derivative [Line Items]
Total fair value of derivative assets	2.2	[1]	0.2	[1]
Total fair value of derivative liabilities	3.0	[1]	7.1	[1]
Designated As Hedging Instrument [Member] | Foreign Currency Forward Contracts - Non-Current [Member]
Derivative [Line Items]
Total fair value of derivative assets	0.1	[2]	0.1	[2]
Total fair value of derivative liabilities	0.1	[2]	0.1	[2]
Not Designated [Member]
Derivative [Line Items]
Total fair value of derivative assets	1.9		0
Total fair value of derivative liabilities	0.3		0.2
Not Designated [Member] | Foreign Currency Forward Contracts - Current [Member]
Derivative [Line Items]
Total fair value of derivative assets	1.9	[1]	0	[1]
Total fair value of derivative liabilities	$ 0.3	[1]	$ 0.2	[1]

[1] Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets.

[2] Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets, net, and other liabilities, respectively, on our condensed consolidated balance sheets.

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Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 1,072.0	$ 564.2	$ 2,098.4	$ 925.7
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	489.7	286.3	1,009.9	477.9
Depreciation	139.5	83.5	278.9	143.0
General and administrative	35.5	47.4	73.7	77.5
OPERATING INCOME	407.3	147.0	735.9	227.3
Property and equipment, net	12,984.0	12,108.8	12,984.0	12,108.8	12,421.9
Deepwater [Member]
Segment Reporting Information [Line Items]
Revenues	571.8	232.3	1,120.3	330.4
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	232.6	111.1	492.6	152.0
Depreciation	77.8	33.9	154.4	50.1
General and administrative	0	0	0	0
OPERATING INCOME	261.4	87.3	473.3	128.3
Property and equipment, net	9,576.4	8,774.8	9,576.4	8,774.8
Midwater [Member]
Segment Reporting Information [Line Items]
Revenues	101.4	36.1	192.6	36.1
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	64.5	22.9	126.5	22.9
Depreciation	16.6	5.2	32.4	5.2
General and administrative	0	0	0	0
OPERATING INCOME	20.3	8.0	33.7	8.0
Property and equipment, net	914.2	910.8	914.2	910.8
Jackup [Member]
Segment Reporting Information [Line Items]
Revenues	377.6	289.3	742.7	552.7
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	176.5	145.4	358.0	295.7
Depreciation	42.7	43.2	85.5	85.7
General and administrative	0	0	0	0
OPERATING INCOME	158.4	100.7	299.2	171.3
Property and equipment, net	2,423.7	2,386.1	2,423.7	2,386.1
Other [Member]
Segment Reporting Information [Line Items]
Revenues	21.2	6.5	42.8	6.5
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	16.1	6.9	32.8	7.3
Depreciation	0.5	0.5	1.0	0.9
General and administrative	0	0	0	0
OPERATING INCOME	4.6	(0.9)	9.0	(1.7)
Property and equipment, net	40.2	13.9	40.2	13.9
Operating Segments Total [Member]
Segment Reporting Information [Line Items]
Revenues	1,072.0	564.2	2,098.4	925.7
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	489.7	286.3	1,009.9	477.9
Depreciation	137.6	82.8	273.3	141.9
General and administrative	0	0	0	0
OPERATING INCOME	444.7	195.1	815.2	305.9
Property and equipment, net	12,954.5	12,085.6	12,954.5	12,085.6
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	0	0	0	0
Depreciation	1.9	0.7	5.6	1.1
General and administrative	35.5	47.4	73.7	77.5
OPERATING INCOME	(37.4)	(48.1)	(79.3)	(78.6)
Property and equipment, net	$ 29.5	$ 23.2	$ 29.5	$ 23.2

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Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement [Abstract]
OPERATING REVENUES	$ 1,072.0	$ 564.2	$ 2,098.4	$ 925.7
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	489.7	286.3	1,009.9	477.9
Depreciation	139.5	83.5	278.9	143.0
General and administrative	35.5	47.4	73.7	77.5
Total operating expenses	664.7	417.2	1,362.5	698.4
OPERATING INCOME	407.3	147.0	735.9	227.3
OTHER INCOME (EXPENSE)
Interest income	5.8	2.3	11.7	2.5
Interest expense, net	(30.0)	(19.6)	(64.6)	(23.7)
Other, net	(0.3)	(0.8)	2.2	5.3
Other income (expense), net	(24.5)	(18.1)	(50.7)	(15.9)
INCOME BEFORE INCOME TAXES	382.8	128.9	685.2	211.4
PROVISION FOR INCOME TAXES
Current income tax expense	33.6	27.9	64.0	54.2
Deferred income tax expense (benefit)	6.5	(2.6)	11.1	(11.9)
Total provision for income taxes	40.1	25.3	75.1	42.3
NET INCOME	342.7	103.6	610.1	169.1
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4)	(1.7)	(3.4)	(2.6)
NET INCOME ATTRIBUTABLE TO ENSCO	341.3	101.9	606.7	166.5
TOTAL EARNINGS PER SHARE - BASIC	$ 1.47	$ 0.59	$ 2.62	$ 1.06
TOTAL EARNINGS PER SHARE - DILUTED	$ 1.47	$ 0.59	$ 2.62	$ 1.06
NET INCOME ATTRIBUTABLE TO ENSCO SHARES
Basic	337.8	100.9	600.5	164.5
Diluted	$ 337.8	$ 100.9	$ 600.5	$ 164.5
WEIGHTED-AVERAGE SHARES OUTSTANDING
Basic	229.2	169.8	229.0	155.6
Diluted	229.4	170.2	229.3	155.9
CASH DIVIDENDS PER SHARE	$ 0.375	$ 0.350	$ 0.750	$ 0.700

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Supplemental Financial Information (Other Assets, Net) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Supplemental Financial Information [Abstract]
Intangible assets	$ 170.5	$ 197.3
Unbilled reimbursable receivables	98.5	119.4
Prepaid taxes on intercompany transfers of property	62.5	68.8
Supplemental executive retirement plan assets	28.2	25.6
Wreckage and debris removal receivables	19.0	19.8
Deferred mobilization costs	17.9	38.4
Deferred tax assets	16.1	25.9
Other	27.0	26.4
Other Assets, Net	$ 439.7	$ 521.6

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Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
OPERATING ACTIVITIES
Net income	$ 610.1	$ 169.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	278.9	143.0
Amortization of intangibles and other, net	(17.5)	14.9
Share-based compensation expense	23.6	22.2
Deferred income tax expense (benefit)	11.1	(11.9)
Other	(10.2)	(12.9)
Changes in operating assets and liabilities:	114.6	(148.6)
Net cash provided by operating activities	1,010.6	175.8
INVESTING ACTIVITIES
Additions to property and equipment	(1,047.1)	(265.6)
Proceeds from disposition of assets	57.1	44.4
Acquisition of Pride International, Inc., net of cash acquired	0	(2,656.0)
Other	4.5	(4.5)
Net cash used in investing activities	(985.5)	(2,881.7)
FINANCING ACTIVITIES
Cash dividends paid	(173.8)	(130.7)
Commercial paper borrowings, net	(102.9)	89.9
Reduction of long-term borrowings	(23.7)	(189.6)
Proceeds from issuance of senior notes	0	2,462.8
Reimbursement of equity issuance cost	66.7	(0.6)
Debt financing costs	0	(31.8)
Other	3.4	9.1
Net cash (used in) provided by financing activities	(230.3)	2,209.1
Effect of exchange rate changes on cash and cash equivalents	1.2	0.1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(204.0)	(496.7)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	430.7	1,050.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 226.7	$ 554.0

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Earnings Per Share (Reconciliation Of Net Income Attributable To Ensco Shares) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share [Abstract]
Net income attributable to Ensco	$ 341.3	$ 101.9	$ 606.7	$ 166.5
Net income allocated to restricted shares	(3.5)	(1.0)	(6.2)	(2.0)
Net income attributable to Ensco shares	$ 337.8	$ 100.9	$ 600.5	$ 164.5

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2012

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Schedule Of Segment Reporting Information

	Deepwater		Midwater		Jackup		Other			Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	232.3	$	36.1	$	289.3	$	6.5		$	564.2	$	—		$	564.2
Operating expenses
Contract drilling (exclusive of depreciation)	111.1		22.9		145.4		6.9			286.3		—			286.3
Depreciation	33.9		5.2		43.2		.5			82.8		.7			83.5
General and administrative	—		—		—		—			—		47.4			47.4
Operating income (loss)	$	87.3	$	8.0	$	100.7	$	(.9	)	$	195.1	$	(48.1	)	$	147.0
Property and equipment, net	$	8,774.8	$	910.8	$	2,386.1	$	13.9		$	12,085.6	$	23.2		$	12,108.8

	Deepwater		Midwater		Jackup		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	571.8	$	101.4	$	377.6	$	21.2	$	1,072.0	$	—		$	1,072.0
Operating expenses
Contract drilling (exclusive of depreciation)	232.6		64.5		176.5		16.1		489.7		—			489.7
Depreciation	77.8		16.6		42.7		.5		137.6		1.9			139.5
General and administrative	—		—		—		—		—		35.5			35.5
Operating income (loss)	$	261.4	$	20.3	$	158.4	$	4.6	$	444.7	$	(37.4	)	$	407.3
Property and equipment, net	$	9,576.4	$	914.2	$	2,423.7	$	40.2	$	12,954.5	$	29.5		$	12,984.0

Schedule Of Geographic Distribution Of Rigs By Segment

As of June 30, 2012, the geographic distribution of our drilling rigs by operating segment was as follows:

	Deepwater	Midwater	Jackup	Other	Total(1)
North & South America (excl. Brazil)	6	—	14	—	20
Brazil	6	5	—	—	11
Europe & Mediterranean	1	—	8	—	9
Middle East & Africa	4	1	11	—	16
Asia & Pacific Rim	2	—	11	1	14
Asia & Pacific Rim (under construction)	4	—	3	—	7
Total	23	6	47	1	77

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Earnings Per Share (Reconciliation Of Weighted-Average Shares Used In Earnings Per Share Computations) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share [Abstract]
Weighted-average shares - basic (in shares)	229,200,000	169,800,000	229,000,000	155,600,000
Potentially dilutive share options (in shares)	200,000	400,000	300,000	300,000
Weighted-average shares - diluted (in shares)	229,400,000	170,200,000	229,300,000	155,900,000
Antidilutive share options excluded from computation of diluted earnings per share (in shares)	704,000	431,000	426,000	397,000

XML

Guarantee Of Registered Securities (Tables)

6 Months Ended

Jun. 30, 2012

Guarantees [Abstract]

Condensed Consolidating Statements Of Income

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Three Months Ended June 30, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	5.7		$	64.7		$	—		$	1,110.3		$	(108.7	)	$	1,072.0
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	13.2			64.7			—			520.5			(108.7		)	489.7
Depreciation	.1			.9			—			138.5			—			139.5
General and administrative	13.9			.1			—			21.5			—			35.5
OPERATING INCOME (LOSS)	(21.5		)	(1.0		)	—			429.8			—			407.3
OTHER INCOME (EXPENSE), NET	(8.9		)	(5.6		)	(14.9		)	4.9			—			(24.5		)
INCOME BEFORE INCOME TAXES	(30.4		)	(6.6		)	(14.9		)	434.7			—			382.8
INCOME TAX PROVISION	—			21.7			7.0			11.4						40.1
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	371.7			81.4			97.1			—			(550.2		)	—
NET INCOME	341.3			53.1			75.2			423.3			(550.2		)	342.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.4		)	—			(1.4		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	341.3		$	53.1		$	75.2		$	421.9		$	(550.2	)	$	341.3

Condensed Consolidating Statements Of Comprehensive Income [Table Text Block]

	Ensco plc		ENSCO International Incorporated			Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	341.3	$	53.1		$	75.2	$	423.3		$	(550.2	)	$	342.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		(1.0		)	—		.9			—			(.1		)
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		—			—		(.8		)	—			(.8		)
Other	—		—			—		.4			—			.4
NET OTHER COMPREHENSIVE INCOME	—		(1.0		)	—		.5			—			(.5		)
COMPREHENSIVE INCOME	341.3		52.1			75.2		423.8			(550.2		)	342.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—			—		(1.4		)	—			(1.4		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	341.3	$	52.1		$	75.2	$	422.4		$	(550.2	)	$	340.8

Condensed Consolidating Balance Sheets

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2012 (in millions)
	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco		Consolidating Adjustments			Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	21.7	$	17.7	$	10.4	$	176.9	$	—		$	226.7
Accounts receivable, net	—		7.7		.7		847.9		—			856.3
Accounts receivable from affiliates	1,279.7		166.6		—		1,583.3		(3,029.6		)	—
Other	3.2		32.2		—		342.1		—			377.5
Total current assets	1,304.6		224.2		11.1		2,950.2		(3,029.6		)	1,460.5
PROPERTY AND EQUIPMENT, AT COST	1.8		29.2		—		15,280.8		—			15,311.8
Less accumulated depreciation	.9		21.8		—		2,305.1		—			2,327.8
Property and equipment, net	.9		7.4		—		12,975.7		—			12,984.0
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	2,793.4		3,413.3		751.0		5,245.7		(12,203.4		)	—
INVESTMENTS IN AFFILIATES	12,952.3		3,137.8		4,998.9		—		(21,089.0		)	—
OTHER ASSETS, NET	12.6		79.5		—		347.6		—			439.7
	$	17,063.8	$	6,862.2	$	5,761.0	$	24,793.2	$	(36,322.0	)	$	18,158.2
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	30.7	$	35.7	$	34.2	$	981.1	$	—		$	1,081.7
Accounts payable to affiliates	1,581.1		64.8		.1		1,383.6		(3,029.6		)	—
Short-term debt	22.0		—		—		—		—			22.0
Current maturities of long-term debt	—		—		—		47.5		—			47.5
Total current liabilities	1,633.8		100.5		34.3		2,412.2		(3,029.6		)	1,151.2
DUE TO AFFILIATES	2,022.7		2,623.9		614.5		6,942.3		(12,203.4		)	—
LONG-TERM DEBT	2,467.7		149.0		2,056.8		164.5		—			4,838.0
DEFERRED INCOME TAXES	—		318.2		—		16.1		—			334.3
OTHER LIABILITIES	6.4		7.5		11.6		393.8		—			419.3
ENSCO SHAREHOLDERS' EQUITY	10,933.2		3,663.1		3,043.8		14,857.4		(21,089.0		)	11,408.5
NONCONTROLLING INTERESTS	—		—		—		6.9		—			6.9
Total equity	10,933.2		3,663.1		3,043.8		14,864.3		(21,089.0		)	11,415.4
	$	17,063.8	$	6,862.2	$	5,761.0	$	24,793.2	$	(36,322.0	)	$	18,158.2

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2011 (in millions)
	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco		Consolidating Adjustments			Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	236.6	$	—	$	22.6	$	171.5	$	—		$	430.7
Accounts receivable, net	—		.3		5.2		846.2		—			851.7
Accounts receivable from affiliates	1,268.4		89.8		278.2		1,194.5		(2,830.9		)	—
Other	2.8		35.2		46.2		314.7		—			398.9
Total current assets	1,507.8		125.3		352.2		2,526.9		(2,830.9		)	1,681.3
PROPERTY AND EQUIPMENT, AT COST	1.8		30.6		—		14,451.0		—			14,483.4
Less accumulated depreciation	.7		23.8		—		2,037.0		—			2,061.5
Property and equipment, net	1.1		6.8		—		12,414.0		—			12,421.9
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	2,002.3		2,486.9		313.5		3,638.7		(8,441.4		)	—
INVESTMENTS IN AFFILIATES	12,041.9		2,966.0		4,802.6		—		(19,810.5		)	—
OTHER ASSETS, NET	13.9		83.4		9.8		414.5		—			521.6
	$	15,567.0	$	5,668.4	$	5,478.1	$	22,268.1	$	(31,082.8	)	$	17,898.8
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	30.4	$	20.0	$	27.4	$	1,082.3	$	—		$	1,160.1
Accounts payable to affiliates	575.1		606.6		85.2		1,564.0		(2,830.9		)	—
Short-term debt	125.0		—		—		—		—			125.0
Current maturities of long-term debt	—		—		—		47.5		—			47.5
Total current liabilities	730.5		626.6		112.6		2,693.8		(2,830.9		)	1,332.6
DUE TO AFFILIATES	2,191.7		1,058.2		401.3		4,790.2		(8,441.4		)	—
LONG-TERM DEBT	2,465.7		149.0		2,072.5		190.4		—			4,877.6
DEFERRED INCOME TAXES	—		326.8		—		12.7		—			339.5
OTHER LIABILITIES	—		5.2		18.7		440.7		—			464.6
ENSCO SHAREHOLDERS' EQUITY	10,179.1		3,502.6		2,873.0		14,135.1		(19,810.5		)	10,879.3
NONCONTROLLING INTERESTS	—		—		—		5.2		—			5.2
Total equity	10,179.1		3,502.6		2,873.0		14,140.3		(19,810.5		)	10,884.5
	$	15,567.0	$	5,668.4	$	5,478.1	$	22,268.1	$	(31,082.8	)	$	17,898.8

Condensed Consolidating Statements Of Cash Flows

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(17.7	)	$	(38.0	)	$	10.9		$	1,055.4		$	—	$	1,010.6
INVESTING ACTIVITIES
Additions to property and equipment	—			1.4			—			(1,048.5		)	—		(1,047.1		)
Proceeds from disposition of assets	—			—			—			57.1			—		57.1
Other	—			—			—			4.5			—		4.5
Net cash (used in) provided by investing activities	—			1.4			—			(986.9		)	—		(985.5		)
FINANCING ACTIVITIES
Cash dividends paid	(173.8		)	—			—			—			—		(173.8		)
Commercial paper borrowings, net	(102.9		)	—			—			—			—		(102.9		)
Reimbursement of equity issuance cost	66.7			—			—			—			—		66.7
Reduction of long-term borrowings	—			—			—			(23.7		)	—		(23.7		)
Advances (to) from affiliates	10.3			42.4			(23.1		)	(29.6		)	—		—
Other	2.5			11.9			—			(11.0		)	—		3.4
Net cash provided by (used in) financing activities	(197.2		)	54.3			(23.1		)	(64.3		)	—		(230.3		)
Effect of exchange rate changes on cash and cash equivalents	—			—			—			1.2			—		1.2
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(214.9		)	17.7			(12.2		)	5.4			—		(204.0		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	236.6			—			22.6			171.5			—		430.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	21.7		$	17.7		$	10.4		$	176.9		$	—	$	226.7

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2011 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(47.6	)	$	9.7		$	9.4		$	204.3		$	—	$	175.8
INVESTING ACTIVITIES
Acquisition of Pride International, Inc., net of cash acquired	—			—			92.9			(2,748.9		)	—		(2,656.0		)
Additions to property and equipment	—			(.1		)	(2.5		)	(263.0		)	—		(265.6		)
Proceeds from disposition of assets	—			—			—			44.4			—		44.4
Other	—			—			—			(4.5		)	—		(4.5		)
Net cash (used in) provided by investing activities	—			(.1		)	90.4			(2,972.0		)	—		(2,881.7		)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	2,462.8			—			—			—			—		2,462.8
Reduction of long-term borrowings	—			—			(181.0		)	(8.6		)	—		(189.6		)
Cash dividends paid	(130.7		)	—			—			—			—		(130.7		)
Commercial paper borrowings, net	89.9			—			—			—			—		89.9
Debt financing costs	(23.1		)	(4.7		)	—			(4.0		)	—		(31.8		)
Advances (to) from affiliates	(2,131.5		)	80.2			118.9			1,932.4			—		—
Other	(.7		)	—			—			9.2			—		8.5
Net cash provided by (used in) financing activities	266.7			75.5			(62.1		)	1,929.0			—		2,209.1
Effect of exchange rate changes on cash and cash equivalents	—			—			—			.1			—		.1
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	219.1			85.1			37.7			(838.6		)	—		(496.7		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3.4			19.1			—			1,028.2			—		1,050.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	222.5		$	104.2		$	37.7		$	189.6		$	—	$	554.0

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Unaudited Condensed Consolidated Financial Statements

6 Months Ended

Jun. 30, 2012

Unaudited Condensed Consolidated Financial Statements [Abstract]

Unaudited Condensed Consolidated Financial Statements

Unaudited Condensed Consolidated Financial Statements

We prepared the accompanying condensed consolidated financial statements of Ensco plc and subsidiaries (the "Company," "Ensco," "we" or "us") in accordance with accounting principles generally accepted in the United States of America ("GAAP"), pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") included in the instructions to Form 10-Q and Article 10 of Regulation S-X. The financial information included in this report is unaudited but, in our opinion, includes all adjustments (consisting of normal recurring adjustments) that are necessary for a fair presentation of our financial position, results of operations and cash flows for the interim periods presented. The December 31, 2011 condensed consolidated balance sheet data were derived from our 2011 audited consolidated financial statements, but do not include all disclosures required by GAAP. Certain previously reported amounts have been reclassified to conform to the current year presentation, including retrospective adjustments made to our 2011 condensed consolidated balance sheet to properly reflect the final amount of goodwill recognized as a result of the Merger. The preparation of our condensed consolidated financial statements requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, the related revenues and expenses and disclosures of gain and loss contingencies as of the date of the financial statements. Actual results could differ from those estimates.

The financial data for the three-month and six-month periods ended June 30, 2012 and 2011 included herein have been subjected to a limited review by KPMG LLP, our independent registered public accounting firm. The accompanying independent registered public accounting firm's review report is not a report within the meaning of Sections 7 and 11 of the Securities Act of 1933, and the independent registered public accounting firm's liability under Section 11 does not extend to it.

Results of operations for the three-month and six-month periods ended June 30, 2012 are not necessarily indicative of the results of operations that will be realized for the year ending December 31, 2012. We recommend these condensed consolidated financial statements be read in conjunction with our annual report on Form 10-K for the year ended December 31, 2011 and our quarterly report on Form 10-Q filed with the SEC on February 24, 2012 and May 3, 2012, respectively.

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Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Comprehensive Income [Abstract]
NET INCOME	$ 342.7	$ 103.6	$ 610.1	$ 169.1
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	(0.1)	3.1	6.2	6.0
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income	(0.8)	(1.5)	(0.9)	(2.3)
Other	0.4	0	(1.5)	0
Net other comprehensive income (loss)	(0.5)	1.6	3.8	3.7
COMPREHENSIVE INCOME	342.2	105.2	613.9	172.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4)	(1.7)	(3.4)	(2.6)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$ 340.8	$ 103.5	$ 610.5	$ 170.2

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Guarantee Of Registered Securities

6 Months Ended

Jun. 30, 2012

Guarantees [Abstract]

Guarantee Of Registered Securities

Guarantee of Registered Securities

In connection with the Merger, Ensco plc and Pride entered into a supplemental indenture to the indenture dated as of July 1, 2004 between Pride and the Bank of New York Mellon, as indenture trustee, providing for, among other matters, the full and unconditional guarantee by Ensco plc of Pride’s 8.5% unsecured senior notes due 2019, 6.875% unsecured senior notes due 2020 and 7.875% unsecured senior notes due 2040, which had an aggregate outstanding principal balance of $1.7 billion as of June 30, 2012. The Ensco plc guarantee provides for the unconditional and irrevocable guarantee of the prompt payment, when due, of any amount owed to the holders of the notes.

Ensco plc also is a full and unconditional guarantor of the 7.2% debentures due 2027 issued by Ensco Delaware in November 1997, which had an aggregate outstanding principal balance of $150.0 million as of June 30, 2012.

All guarantees are unsecured obligations of Ensco plc ranking equal in right of payment with all of its existing and future unsecured and unsubordinated indebtedness.

The following tables present the condensed consolidating statements of income for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions); the condensed consolidating statements of comprehensive income for the three-month and six-month periods ended June 30, 2012 and 2011; the condensed consolidating balance sheets as of June 30, 2012 and December 31, 2011; and the condensed consolidating statements of cash flows for the six-months ended June 30, 2012 and 2011, in accordance with Rule 3-10 of Regulation S-X.

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Three Months Ended June 30, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	5.7		$	64.7		$	—		$	1,110.3		$	(108.7	)	$	1,072.0
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	13.2			64.7			—			520.5			(108.7		)	489.7
Depreciation	.1			.9			—			138.5			—			139.5
General and administrative	13.9			.1			—			21.5			—			35.5
OPERATING INCOME (LOSS)	(21.5		)	(1.0		)	—			429.8			—			407.3
OTHER INCOME (EXPENSE), NET	(8.9		)	(5.6		)	(14.9		)	4.9			—			(24.5		)
INCOME BEFORE INCOME TAXES	(30.4		)	(6.6		)	(14.9		)	434.7			—			382.8
INCOME TAX PROVISION	—			21.7			7.0			11.4						40.1
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	371.7			81.4			97.1			—			(550.2		)	—
NET INCOME	341.3			53.1			75.2			423.3			(550.2		)	342.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.4		)	—			(1.4		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	341.3		$	53.1		$	75.2		$	421.9		$	(550.2	)	$	341.3

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Three Months Ended June 30, 2011 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	—		$	—		$	—		$	564.7		$	(.5	)	$	564.2
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	.9			—			—			285.9			(.5		)	286.3
Depreciation	.1			.2			—			83.2			—			83.5
General and administrative	11.5			—			—			35.9			—			47.4
OPERATING INCOME (LOSS)	(12.5		)	(.2		)	—			159.7			—			147.0
OTHER INCOME (EXPENSE), NET	(3.0		)	(.6		)	(3.6		)	(10.9		)	—			(18.1		)
INCOME BEFORE INCOME TAXES	(15.5		)	(.8		)	(3.6		)	148.8			—			128.9
INCOME TAX PROVISION	—			13.7			(1.3		)	12.9			—			25.3
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	117.4			54.7			18.4			—			(190.5		)	—
NET INCOME	101.9			40.2			16.1			135.9			(190.5		)	103.6
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.7		)	—			(1.7		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	101.9		$	40.2		$	16.1		$	134.2		$	(190.5	)	$	101.9

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Six Months Ended June 30, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	33.3		$	75.3		$	—		$	2,159.1		$	(169.3	)	$	2,098.4
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	26.1			75.3			—			1,077.8			(169.3		)	1,009.9
Depreciation	.2			1.7			—			277.0			—			278.9
General and administrative	28.5			.1			—			45.1			—			73.7
OPERATING INCOME (LOSS)	(21.5		)	(1.8		)	—			759.2			—			735.9
OTHER INCOME (EXPENSE), NET	(20.1		)	(5.9		)	(26.6		)	1.9			—			(50.7		)
INCOME BEFORE INCOME TAXES	(41.6		)	(7.7		)	(26.6		)	761.1			—			685.2
INCOME TAX PROVISION	—			32.9			7.0			35.2			—			75.1
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	648.3			125.6			176.8			—			(950.7		)	—
NET INCOME	606.7			85.0			143.2			725.9			(950.7		)	610.1
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(3.4		)	—			(3.4		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	606.7		$	85.0		$	143.2		$	722.5		$	(950.7	)	$	606.7

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME Six Months Ended June 30, 2011 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	—		$	—		$	—		$	926.5		$	(.8	)	$	925.7
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	1.6			—			—			477.1			(.8		)	477.9
Depreciation	.2			.5			—			142.3			—			143.0
General and administrative	24.8			—			—			52.7			—			77.5
OPERATING INCOME (LOSS)	(26.6		)	(.5		)	—			254.4			—			227.3
OTHER INCOME (EXPENSE), NET	.6			(.8		)	(3.6		)	(12.1		)	—			(15.9		)
INCOME BEFORE INCOME TAXES	(26.0		)	(1.3		)	(3.6		)	242.3			—			211.4
INCOME TAX PROVISION	—			19.3			(1.3		)	24.3			—			42.3
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	192.5			120.9			18.4			—			(331.8		)	—
NET INCOME	166.5			100.3			16.1			218.0			(331.8		)	169.1
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(2.6		)	—			(2.6		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	166.5		$	100.3		$	16.1		$	215.4		$	(331.8	)	$	166.5

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

Three Months Ended June 30, 2012

(in millions)

	Ensco plc		ENSCO International Incorporated			Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	341.3	$	53.1		$	75.2	$	423.3		$	(550.2	)	$	342.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		(1.0		)	—		.9			—			(.1		)
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		—			—		(.8		)	—			(.8		)
Other	—		—			—		.4			—			.4
NET OTHER COMPREHENSIVE INCOME	—		(1.0		)	—		.5			—			(.5		)
COMPREHENSIVE INCOME	341.3		52.1			75.2		423.8			(550.2		)	342.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—			—		(1.4		)	—			(1.4		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	341.3	$	52.1		$	75.2	$	422.4		$	(550.2	)	$	340.8

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

Three Months Ended June 30, 2011

(in millions)

	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	101.9	$	40.2	$	16.1	$	135.9		$	(190.5	)	$	103.6
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		1.2		—		1.9			—			3.1
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		—		—		(1.5		)	—			(1.5		)
Other	—		—		—		—			—			—
NET OTHER COMPREHENSIVE INCOME	—		1.2		—		.4			—			1.6
COMPREHENSIVE INCOME	101.9		41.4		16.1		136.3			(190.5		)	105.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—		—		(1.7		)	—			(1.7		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	101.9	$	41.4	$	16.1	$	134.6		$	(190.5	)	$	103.5

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

Six Months Ended June 30, 2012

(in millions)

	Ensco plc		ENSCO International Incorporated			Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	606.7	$	85.0		$	143.2	$	725.9		$	(950.7	)	$	610.1
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		(4.4		)	—		10.6			—			6.2
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		.1			—		(1.0		)	—			(.9		)
Other	—		—			—		(1.5		)	—			(1.5		)
NET OTHER COMPREHENSIVE INCOME	—		(4.3		)	—		8.1			—			3.8
COMPREHENSIVE INCOME	606.7		80.7			143.2		734.0			(950.7		)	613.9
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—			—		(3.4		)	—			(3.4		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	606.7	$	80.7		$	143.2	$	730.6		$	(950.7	)	$	610.5

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME

Six Months Ended June 30, 2011

(in millions)

	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	166.5	$	100.3	$	16.1	$	218.0		$	(331.8	)	$	169.1
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		3.2		—		2.8			—			6.0
Reclassification of gains and losses on derivative instruments from other comprehensive (income) into net income	—		.1		—		(2.4		)	—			(2.3		)
Other	—		—		—		—			—			—
NET OTHER COMPREHENSIVE INCOME	—		3.3		—		.4			—			3.7
COMPREHENSIVE INCOME	166.5		103.6		16.1		218.4			(331.8		)	172.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—		—		(2.6		)	—			(2.6		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	166.5	$	103.6	$	16.1	$	215.8		$	(331.8	)	$	170.2

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2012 (in millions)
	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco		Consolidating Adjustments			Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	21.7	$	17.7	$	10.4	$	176.9	$	—		$	226.7
Accounts receivable, net	—		7.7		.7		847.9		—			856.3
Accounts receivable from affiliates	1,279.7		166.6		—		1,583.3		(3,029.6		)	—
Other	3.2		32.2		—		342.1		—			377.5
Total current assets	1,304.6		224.2		11.1		2,950.2		(3,029.6		)	1,460.5
PROPERTY AND EQUIPMENT, AT COST	1.8		29.2		—		15,280.8		—			15,311.8
Less accumulated depreciation	.9		21.8		—		2,305.1		—			2,327.8
Property and equipment, net	.9		7.4		—		12,975.7		—			12,984.0
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	2,793.4		3,413.3		751.0		5,245.7		(12,203.4		)	—
INVESTMENTS IN AFFILIATES	12,952.3		3,137.8		4,998.9		—		(21,089.0		)	—
OTHER ASSETS, NET	12.6		79.5		—		347.6		—			439.7
	$	17,063.8	$	6,862.2	$	5,761.0	$	24,793.2	$	(36,322.0	)	$	18,158.2
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	30.7	$	35.7	$	34.2	$	981.1	$	—		$	1,081.7
Accounts payable to affiliates	1,581.1		64.8		.1		1,383.6		(3,029.6		)	—
Short-term debt	22.0		—		—		—		—			22.0
Current maturities of long-term debt	—		—		—		47.5		—			47.5
Total current liabilities	1,633.8		100.5		34.3		2,412.2		(3,029.6		)	1,151.2
DUE TO AFFILIATES	2,022.7		2,623.9		614.5		6,942.3		(12,203.4		)	—
LONG-TERM DEBT	2,467.7		149.0		2,056.8		164.5		—			4,838.0
DEFERRED INCOME TAXES	—		318.2		—		16.1		—			334.3
OTHER LIABILITIES	6.4		7.5		11.6		393.8		—			419.3
ENSCO SHAREHOLDERS' EQUITY	10,933.2		3,663.1		3,043.8		14,857.4		(21,089.0		)	11,408.5
NONCONTROLLING INTERESTS	—		—		—		6.9		—			6.9
Total equity	10,933.2		3,663.1		3,043.8		14,864.3		(21,089.0		)	11,415.4
	$	17,063.8	$	6,862.2	$	5,761.0	$	24,793.2	$	(36,322.0	)	$	18,158.2

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2011 (in millions)
	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco		Consolidating Adjustments			Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	236.6	$	—	$	22.6	$	171.5	$	—		$	430.7
Accounts receivable, net	—		.3		5.2		846.2		—			851.7
Accounts receivable from affiliates	1,268.4		89.8		278.2		1,194.5		(2,830.9		)	—
Other	2.8		35.2		46.2		314.7		—			398.9
Total current assets	1,507.8		125.3		352.2		2,526.9		(2,830.9		)	1,681.3
PROPERTY AND EQUIPMENT, AT COST	1.8		30.6		—		14,451.0		—			14,483.4
Less accumulated depreciation	.7		23.8		—		2,037.0		—			2,061.5
Property and equipment, net	1.1		6.8		—		12,414.0		—			12,421.9
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	2,002.3		2,486.9		313.5		3,638.7		(8,441.4		)	—
INVESTMENTS IN AFFILIATES	12,041.9		2,966.0		4,802.6		—		(19,810.5		)	—
OTHER ASSETS, NET	13.9		83.4		9.8		414.5		—			521.6
	$	15,567.0	$	5,668.4	$	5,478.1	$	22,268.1	$	(31,082.8	)	$	17,898.8
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	30.4	$	20.0	$	27.4	$	1,082.3	$	—		$	1,160.1
Accounts payable to affiliates	575.1		606.6		85.2		1,564.0		(2,830.9		)	—
Short-term debt	125.0		—		—		—		—			125.0
Current maturities of long-term debt	—		—		—		47.5		—			47.5
Total current liabilities	730.5		626.6		112.6		2,693.8		(2,830.9		)	1,332.6
DUE TO AFFILIATES	2,191.7		1,058.2		401.3		4,790.2		(8,441.4		)	—
LONG-TERM DEBT	2,465.7		149.0		2,072.5		190.4		—			4,877.6
DEFERRED INCOME TAXES	—		326.8		—		12.7		—			339.5
OTHER LIABILITIES	—		5.2		18.7		440.7		—			464.6
ENSCO SHAREHOLDERS' EQUITY	10,179.1		3,502.6		2,873.0		14,135.1		(19,810.5		)	10,879.3
NONCONTROLLING INTERESTS	—		—		—		5.2		—			5.2
Total equity	10,179.1		3,502.6		2,873.0		14,140.3		(19,810.5		)	10,884.5
	$	15,567.0	$	5,668.4	$	5,478.1	$	22,268.1	$	(31,082.8	)	$	17,898.8

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(17.7	)	$	(38.0	)	$	10.9		$	1,055.4		$	—	$	1,010.6
INVESTING ACTIVITIES
Additions to property and equipment	—			1.4			—			(1,048.5		)	—		(1,047.1		)
Proceeds from disposition of assets	—			—			—			57.1			—		57.1
Other	—			—			—			4.5			—		4.5
Net cash (used in) provided by investing activities	—			1.4			—			(986.9		)	—		(985.5		)
FINANCING ACTIVITIES
Cash dividends paid	(173.8		)	—			—			—			—		(173.8		)
Commercial paper borrowings, net	(102.9		)	—			—			—			—		(102.9		)
Reimbursement of equity issuance cost	66.7			—			—			—			—		66.7
Reduction of long-term borrowings	—			—			—			(23.7		)	—		(23.7		)
Advances (to) from affiliates	10.3			42.4			(23.1		)	(29.6		)	—		—
Other	2.5			11.9			—			(11.0		)	—		3.4
Net cash provided by (used in) financing activities	(197.2		)	54.3			(23.1		)	(64.3		)	—		(230.3		)
Effect of exchange rate changes on cash and cash equivalents	—			—			—			1.2			—		1.2
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(214.9		)	17.7			(12.2		)	5.4			—		(204.0		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	236.6			—			22.6			171.5			—		430.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	21.7		$	17.7		$	10.4		$	176.9		$	—	$	226.7

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Six Months Ended June 30, 2011 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(47.6	)	$	9.7		$	9.4		$	204.3		$	—	$	175.8
INVESTING ACTIVITIES
Acquisition of Pride International, Inc., net of cash acquired	—			—			92.9			(2,748.9		)	—		(2,656.0		)
Additions to property and equipment	—			(.1		)	(2.5		)	(263.0		)	—		(265.6		)
Proceeds from disposition of assets	—			—			—			44.4			—		44.4
Other	—			—			—			(4.5		)	—		(4.5		)
Net cash (used in) provided by investing activities	—			(.1		)	90.4			(2,972.0		)	—		(2,881.7		)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	2,462.8			—			—			—			—		2,462.8
Reduction of long-term borrowings	—			—			(181.0		)	(8.6		)	—		(189.6		)
Cash dividends paid	(130.7		)	—			—			—			—		(130.7		)
Commercial paper borrowings, net	89.9			—			—			—			—		89.9
Debt financing costs	(23.1		)	(4.7		)	—			(4.0		)	—		(31.8		)
Advances (to) from affiliates	(2,131.5		)	80.2			118.9			1,932.4			—		—
Other	(.7		)	—			—			9.2			—		8.5
Net cash provided by (used in) financing activities	266.7			75.5			(62.1		)	1,929.0			—		2,209.1
Effect of exchange rate changes on cash and cash equivalents	—			—			—			.1			—		.1
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	219.1			85.1			37.7			(838.6		)	—		(496.7		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3.4			19.1			—			1,028.2			—		1,050.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	222.5		$	104.2		$	37.7		$	189.6		$	—	$	554.0

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Document And Entity Information	6 Months Ended
	Jun. 30, 2012	Jul. 19, 2012
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Entity Registrant Name	Ensco plc
Entity Central Index Key	0000314808
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Shares, Shares Outstanding		231,990,811

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Acquisition Of Pride International, Inc. (Tables)

6 Months Ended

Jun. 30, 2012

Business Combinations [Abstract]

Schedule Of Business Acquisition, Provisional Amounts Recorded For Assets Acquired And Liabilities Assumed

The provisional amounts recognized at the Merger Date, respective measurement period adjustments and final estimated fair values recorded for assets acquired and liabilities assumed were as follows:

	Amounts Recognized as of Merger Date		Measurement Period Adjustments(1)			Estimated Fair Value
Assets:
Cash and cash equivalents	$	147.0	$	—		$	147.0
Accounts receivable(2)	371.3		38.1			409.4
Other current assets	150.9		32.7			183.6
Property and equipment	6,758.8		(9.4		)	6,749.4
Other assets	343.7		27.8			371.5
Liabilities:
Accounts payable and accrued liabilities and other	539.8		60.6			600.4
Debt	2,436.0		—			2,436.0
Deferred income tax liabilities	19.0		(.1		)	18.9
Other liabilities	319.8		7.7			327.5
Net assets acquired	4,457.1		21.0			4,478.1
Less merger consideration	7,415.9		—			7,415.9
Goodwill	$	2,958.8	$	(21.0	)	$	2,937.8

(1) The measurement period adjustments reflect changes in the estimated fair values of certain assets and liabilities, primarily related to inventory, contingencies and income taxes.  The measurement period adjustments were recorded to reflect new information obtained about facts and circumstances existing as of the Merger Date and did not result from subsequent intervening events.  These adjustments did not have a material impact on our previously reported financial position or results of operations subsequent to the Merger Date; however, we have retrospectively revised our 2011 consolidated financial statements to reflect these adjustments as if they were recorded on the Merger Date. 

(2) Gross contractual amounts receivable totaled $466.7 million as of the Merger Date.

Schedule Of Goodwill Recognized

Goodwill recognized as a result of the Merger was allocated to our reportable segments as follows (in millions):

Deepwater	$	2,467.5
Midwater	470.3
Jackup	—
Total	$	2,937.8

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Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 226.7	$ 430.7
Accounts receivable, net	856.3	851.7
Other	377.5	398.9
Total current assets	1,460.5	1,681.3
PROPERTY AND EQUIPMENT, AT COST	15,311.8	14,483.4
Less accumulated depreciation	2,327.8	2,061.5
Property and equipment, net	12,984.0	12,421.9
GOODWILL	3,274.0	3,274.0
OTHER ASSETS, NET	439.7	521.6
TOTAL ASSETS	18,158.2	17,898.8
CURRENT LIABILITIES
Accounts payable - trade	541.9	644.4
Accrued liabilities and other	539.8	515.7
Short-term debt	22.0	125.0
Current maturities of long-term debt	47.5	47.5
Total current liabilities	1,151.2	1,332.6
LONG-TERM DEBT	4,838.0	4,877.6
DEFERRED INCOME TAXES	334.3	339.5
OTHER LIABILITIES	419.3	464.6
COMMITMENTS AND CONTINGENCIES
ENSCO SHAREHOLDERS' EQUITY
Additional paid-in capital	5,354.1	5,253.0
Retained earnings	6,045.9	5,613.1
Accumulated other comprehensive income	12.4	8.6
Treasury shares, at cost, 5.6 million shares and 4.9 million shares	(27.8)	(19.1)
Total Ensco shareholders' equity	11,408.5	10,879.3
NONCONTROLLING INTERESTS	6.9	5.2
Total equity	11,415.4	10,884.5
Total liabilities and shareholders' equity	18,158.2	17,898.8
Class A ordinary shares, U.S. [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	23.8	23.6
Common Class B, Par Value In GBP [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	$ 0.1	$ 0.1

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Earnings Per Share

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

We compute basic and diluted earnings per share ("EPS") in accordance with the two-class method. Net income attributable to Ensco used in our computations of basic and diluted EPS is adjusted to exclude net income allocated to restricted shares and restricted share units granted to our employees and non-employee directors. Weighted-average shares outstanding used in our computation of diluted EPS includes the dilutive effect of share options using the treasury stock method and excludes restricted shares.

The following table is a reconciliation of net income attributable to Ensco shares used in our basic and diluted EPS computations for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Net income attributable to Ensco	$	341.3		$	101.9		$	606.7		$	166.5
Net income allocated to restricted shares	(3.5		)	(1.0		)	(6.2		)	(2.0		)
Net income attributable to Ensco shares	$	337.8		$	100.9		$	600.5		$	164.5

The following table is a reconciliation of the weighted-average shares used in our basic and diluted EPS computations for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions):

	Three Months Ended June 30,		Six Months Ended June 30,
	2012	2011	2012	2011
Weighted-average shares - basic	229.2	169.8	229.0	155.6
Potentially dilutive share options	.2	.4	.3	.3
Weighted-average shares - diluted	229.4	170.2	229.3	155.9

Antidilutive share options totaling 704,000 and 431,000 were excluded from the computation of diluted EPS for the three-month periods ended June 30, 2012 and 2011, respectively. Antidilutive share options totaling 426,000 and 397,000 were excluded from the computation of diluted EPS for the six-month periods ended June 30, 2012 and 2011, respectively.

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Share-Based Compensation

6 Months Ended

Jun. 30, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

Share-Based Compensation

During the three-month and six-month periods ended June 30, 2012, we granted 843,000 and 1.0 million restricted share awards and share unit awards to our employees, officers and non-employee directors for annual equity awards and for equity awards granted to new or recently promoted employees, pursuant to our 2012 Long-Term Incentive Plan ("LTIP"). Grants of non-vested share awards and share unit awards generally vest at a rate of 20% per year, as determined by a committee of the Board of Directors. Non-vested share awards and share unit awards granted to certain officers and non-employee directors vest at a rate of 33% per year. Non-vested share awards and share unit awards have dividend rights effective on the date of grant and are measured at fair value using the market value of our shares on the date of grant. The weighted-average grant-date fair value of non-vested share awards and share unit awards granted during the three-month and six-month periods ended June 30, 2012 was $44.63 and $46.75 per share, respectively. Non-vested share award grants primarily were issued out of treasury.

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Supplemental Financial Information (Tables)

6 Months Ended

Jun. 30, 2012

Supplemental Financial Information [Abstract]

Accounts Receivable, Net

Accounts receivable, net, consisted of the following (in millions):

	June 30, 2012			December 31, 2011
Trade	$	838.4		$	816.7
Other	30.4			48.6
	868.8			865.3
Allowance for doubtful accounts	(12.5		)	(13.6		)
	$	856.3		$	851.7

Other Current Assets

Other current assets consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Inventory	$	203.4	$	201.4
Prepaid taxes	85.2		64.9
Deferred mobilization costs	35.4		43.8
Prepaid expenses	24.0		22.3
Deferred tax assets	10.3		9.8
Marketable securities	—		32.2
Other	19.2		24.5
	$	377.5	$	398.9

Other Assets, Net

Other assets, net, consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Intangible assets	$	170.5	$	197.3
Unbilled reimbursable receivables	98.5		119.4
Prepaid taxes on intercompany transfers of property	62.5		68.8
Supplemental executive retirement plan assets	28.2		25.6
Wreckage and debris removal receivables	19.0		19.8
Deferred mobilization costs	17.9		38.4
Deferred tax assets	16.1		25.9
Other	27.0		26.4
	$	439.7	$	521.6

Accrued Liabilities And Other

Accrued liabilities and other consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Personnel costs	$	170.5	$	159.9
Deferred revenue	129.5		111.3
Taxes	99.3		74.0
Accrued interest	68.2		69.4
Wreckage and debris removal	19.0		16.0
Intangible liabilities	—		43.4
Other	53.3		41.7
	$	539.8	$	515.7

Other Liabilities

Other liabilities consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Intangible liabilities	$	149.0	$	177.8
Deferred revenue	115.4		124.4
Unrecognized tax benefits (inclusive of interest and penalties)	64.1		75.5
Supplemental executive retirement plan liabilities	30.9		30.1
Other	59.9		56.8
	$	419.3	$	464.6

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value Disclosures [Abstract]

Schedule Of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of June 30, 2012
Supplemental executive retirement plan assets	$	28.2	$	—	$	—	$	28.2
Derivatives, net	—		.8		—		.8
Total financial assets	$	28.2	$	.8	$	—	$	29.0
As of December 31, 2011
Hercules Offshore, Inc. common stock	$	32.2	$	—	$	—	$	32.2
Supplemental executive retirement plan assets	25.6		—		—		25.6
Total financial assets	$	57.8	$	—	$	—	$	57.8
Derivatives, net	$	—	$	7.1	$	—	$	7.1
Total financial liabilities	$	—	$	7.1	$	—	$	7.1

Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments

	June 30, 2012				December 31, 2011
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
4.7% Senior notes due 2021	$	1,473.4	$	1,637.3	$	1,472.2	$	1,565.8
6.875% Senior notes due 2020	1,048.3		1,106.6		1,055.8		1,042.7
3.25% Senior notes due 2016	994.2		1,049.8		993.5		1,016.5
8.5% Senior notes due 2019	624.1		651.7		631.7		615.3
7.875% Senior notes due 2040	384.4		432.1		385.0		381.9
7.2% Debentures due 2027	149.0		188.3		149.0		167.2
4.33% MARAD bonds, including current maturities, due 2016	129.4		130.2		146.7		156.4
6.36% MARAD bonds, including current maturities, due 2015	44.4		49.2		50.7		64.0
4.65% MARAD bonds, including current maturities, due 2020	38.3		44.2		40.5		49.6
Total	$	4,885.5	$	5,289.4	$	4,925.1	$	5,059.4

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Segment Information

6 Months Ended

Jun. 30, 2012

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Segment Information

Segment Information

Our business consists of three reportable segments: (1) Deepwater, which includes our drillships and semisubmersible rigs capable of drilling in water depths of 4,500 feet or greater, (2) Midwater, which includes our semisubmersible rigs capable of drilling in water depths of 4,499 feet or less and (3) Jackup, which includes all of our independent leg jackup rigs. Each of our three reportable segments provides one service, contract drilling.  We also manage the drilling operations for three deepwater rigs and own one barge rig, which are included in "Other."

Segment information is presented below (in millions). General and administrative expense and depreciation expense incurred by our corporate office are not allocated to our operating segments for purposes of measuring segment operating income and were included in "Reconciling Items."  

Three Months Ended June 30, 2012

	Deepwater		Midwater		Jackup		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	571.8	$	101.4	$	377.6	$	21.2	$	1,072.0	$	—		$	1,072.0
Operating expenses
Contract drilling (exclusive of depreciation)	232.6		64.5		176.5		16.1		489.7		—			489.7
Depreciation	77.8		16.6		42.7		.5		137.6		1.9			139.5
General and administrative	—		—		—		—		—		35.5			35.5
Operating income (loss)	$	261.4	$	20.3	$	158.4	$	4.6	$	444.7	$	(37.4	)	$	407.3
Property and equipment, net	$	9,576.4	$	914.2	$	2,423.7	$	40.2	$	12,954.5	$	29.5		$	12,984.0

Three Months Ended June 30, 2011

	Deepwater		Midwater		Jackup		Other			Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	232.3	$	36.1	$	289.3	$	6.5		$	564.2	$	—		$	564.2
Operating expenses
Contract drilling (exclusive of depreciation)	111.1		22.9		145.4		6.9			286.3		—			286.3
Depreciation	33.9		5.2		43.2		.5			82.8		.7			83.5
General and administrative	—		—		—		—			—		47.4			47.4
Operating income (loss)	$	87.3	$	8.0	$	100.7	$	(.9	)	$	195.1	$	(48.1	)	$	147.0
Property and equipment, net	$	8,774.8	$	910.8	$	2,386.1	$	13.9		$	12,085.6	$	23.2		$	12,108.8

Six Months Ended June 30, 2012

	Deepwater		Midwater		Jackup		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	1,120.3	$	192.6	$	742.7	$	42.8	$	2,098.4	$	—		$	2,098.4
Operating expenses
Contract drilling (exclusive of depreciation)	492.6		126.5		358.0		32.8		1,009.9		—			1,009.9
Depreciation	154.4		32.4		85.5		1.0		273.3		5.6			278.9
General and administrative	—		—		—		—		—		73.7			73.7
Operating income (loss)	$	473.3	$	33.7	$	299.2	$	9.0	$	815.2	$	(79.3	)	$	735.9
Property and equipment, net	$	9,576.4	$	914.2	$	2,423.7	$	40.2	$	12,954.5	$	29.5		$	12,984.0

Six Months Ended June 30, 2011

	Deepwater		Midwater		Jackup		Other			Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	330.4	$	36.1	$	552.7	$	6.5		$	925.7	$	—		$	925.7
Operating expenses
Contract drilling (exclusive of depreciation)	152.0		22.9		295.7		7.3			477.9		—			477.9
Depreciation	50.1		5.2		85.7		.9			141.9		1.1			143.0
General and administrative	—		—		—		—			—		77.5			77.5
Operating income (loss)	$	128.3	$	8.0	$	171.3	$	(1.7	)	$	305.9	$	(78.6	)	$	227.3
Property and equipment, net	$	8,774.8	$	910.8	$	2,386.1	$	13.9		$	12,085.6	$	23.2		$	12,108.8

Information about Geographic Areas

As of June 30, 2012, the geographic distribution of our drilling rigs by operating segment was as follows:

	Deepwater	Midwater	Jackup	Other	Total(1)
North & South America (excl. Brazil)	6	—	14	—	20
Brazil	6	5	—	—	11
Europe & Mediterranean	1	—	8	—	9
Middle East & Africa	4	1	11	—	16
Asia & Pacific Rim	2	—	11	1	14
Asia & Pacific Rim (under construction)	4	—	3	—	7
Total	23	6	47	1	77

(1) We have three deepwater drilling management contracts not included in the table above.

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Income Taxes

6 Months Ended

Jun. 30, 2012

Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]

Income Taxes

Income Taxes

Our consolidated effective income tax rate for the three-month and six-month periods ended June 30, 2012 of 10.5% and 11.0%, respectively, includes the impact of various discrete tax items, the majority of which are attributable to the derecognition of liabilities upon the lapse of the statute of limitations applicable to uncertain tax positions, partially offset by the resolutions of prior period tax matters. Excluding the impact of the aforementioned discrete items, our consolidated effective income tax rate for the three-month and six-month periods ended June 30, 2012 was 11.3% and 11.7%, respectively, compared to a consolidated effective income tax rate, excluding discrete tax items, of 14.6% and 14.7%, respectively, for the three-month and six-month periods ended June 30, 2011. The decrease in the effective tax rate for both periods primarily was attributable to the impact of the Merger and other changes in taxing jurisdictions in which our drilling rigs are operated and/or owned that resulted in an increase in the relative components of our earnings generated in tax jurisdictions with lower tax rates. This was partially offset by the impact of the expiration of the Look-thru Rule for Related Controlled Foreign Corporations under Internal Revenue Code Section 954(c)(6) on December 31, 2011. The Look-thru rule generally excludes from U.S. federal income tax certain dividends, interest, rents and royalties received or accrued by a controlled foreign corporation from a related controlled foreign corporation that would otherwise be taxable pursuant to the Subpart F regime.

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Contingencies

6 Months Ended

Jun. 30, 2012

Commitments and Contingencies Disclosure [Abstract]

Contingencies

Contingencies

ENSCO 74 Loss

In September 2008, ENSCO 74 was lost as a result of Hurricane Ike in the U.S. Gulf of Mexico.  Portions of its legs remained underwater adjacent to the customer's platform, and the sunken rig hull of ENSCO 74 was located approximately 95 miles from the original drilling location when it was struck by an oil tanker in March 2009.  In 2010, wreck removal operations on the sunken rig hull of ENSCO 74 were completed.

In April 2012, we entered into an agreement with the customer pursuant to which, among other matters, the customer agreed to remove the legs, and we agreed to pay $19.0 million in nine installments upon the completion of certain milestones during the removal. The actual removal costs may be less than or greater than the aggregate amount paid to the customer, which will not result in any reduction in the $19.0 million amount paid or additional payments due to the customer from Ensco. We have insurance coverage for the actual removal costs incurred by the customer. A $19.0 million liability and a corresponding receivable for recovery of those costs under our insurance policy was recorded as of June 30, 2012 and included in accrued liabilities and other and other assets, net, on our condensed consolidated balance sheet.

In September 2009, civil litigation was filed alleging that ENSCO 74 caused a pipeline to rupture during Hurricane Ike and seeking damages for the cost of repairs and business interruption in an amount in excess of $26.0 million. In March 2009, the owner of the oil tanker that struck the hull of ENSCO 74 commenced civil litigation against us seeking monetary damages of $10.0 million for losses incurred when the tanker struck the sunken hull of ENSCO 74. Based on information currently available, primarily the adequacy of available defenses, we have not concluded that it is probable liabilities exist with respect to these matters.

We filed a petition for exoneration or limitation of liability under U.S. admiralty and maritime law in September 2009. The petition seeks exoneration from or limitation of liability for any and all injury, loss or damage caused, occasioned or occurred in relation to the ENSCO 74 loss in September 2008. The owner of the tanker that struck the hull of ENSCO 74 and the owners of two subsea pipelines have presented claims in the exoneration/limitation proceedings.  The matter is scheduled for trial in November 2012.

We have liability insurance policies that provide coverage for claims such as the tanker and pipeline claims as well as removal of wreckage and debris in excess of the property insurance policy sublimit, subject to a $10.0 million per occurrence self-insured retention for third-party claims and an annual aggregate limit of $500.0 million. We believe all liabilities associated with the ENSCO 74 loss during Hurricane Ike resulted from a single occurrence under the terms of the applicable insurance policies. However, legal counsel for certain liability underwriters have asserted that the liability claims arise from separate occurrences. In the event of multiple occurrences, the self-insured retention is $15.0 million for two occurrences and $1.0 million for each occurrence thereafter.

Although we do not expect final disposition of the claims associated with the ENSCO 74 loss to have a material adverse effect upon our financial position, operating results or cash flows, there can be no assurances as to the ultimate outcome.

Asbestos Litigation

We and certain subsidiaries have been named as defendants, along with numerous third-party companies as co-defendants, in multi-party lawsuits filed in Mississippi and Louisiana by approximately 100 plaintiffs. The lawsuits seek an unspecified amount of monetary damages on behalf of individuals alleging personal injury or death, primarily under the Jones Act, purportedly resulting from exposure to asbestos on drilling rigs and associated facilities during the 1960s through the 1980s.

We intend to vigorously defend against these claims and have filed responsive pleadings preserving all defenses and challenges to jurisdiction and venue. However, discovery is still ongoing and, therefore, available information regarding the nature of all pending claims is limited. At present, we cannot reasonably determine how many of the claimants may have valid claims under the Jones Act or estimate a range of potential liability exposure, if any.

In addition to the pending cases in Mississippi and Louisiana, we have other asbestos or lung injury claims pending against us in litigation in other jurisdictions. Although we do not expect the final disposition of these asbestos or lung injury lawsuits to have a material adverse effect upon our financial position, operating results or cash flows, there can be no assurances as to the ultimate outcome of the lawsuits.

Environmental Matters

We currently are subject to pending notices of assessment issued from 2008 to 2012 pursuant to which governmental authorities in Brazil are seeking fines in an aggregate amount of approximately $2.5 million for the release of drilling fluid from drilling rigs operating offshore Brazil.  We are contesting these notices and intend to defend ourselves vigorously.  Although we do not expect the outcome of these assessments to have a material adverse effect on our financial position, operating results or cash flows, there can be no assurance as to the ultimate outcome of these assessments.  A $2.5 million liability related to these matters was recorded as of June 30, 2012.

We currently are subject to a pending administrative proceeding initiated in July 2009 by a governmental authority of Spain pursuant to which such governmental authority is seeking payment in an aggregate amount of approximately $4 million for an alleged environmental spill originating from the ENSCO 5006 while it was operating offshore Spain. Our customer has posted guarantees with the Spanish government to cover potential penalties. Additionally, we expect to be indemnified for any payments resulting from this incident by our customer under the terms of the drilling contract. A criminal investigation of the incident was initiated in July 2010 by a prosecutor in Tarragona, Spain, and the administrative proceedings have been suspended pending the outcome of this investigation.  We do not know at this time what, if any, involvement we may have in this investigation.

We intend to defend ourselves vigorously in the administrative proceeding and any criminal investigation. At this time, we are unable to predict the outcome of these matters or estimate the extent to which we may be exposed to any resulting liability. Although we do not expect the outcome of the proceedings to have a material adverse effect on our financial position, operating results or cash flows, there can be no assurance as to the ultimate outcome of the proceedings.

Other Matters

In addition to the foregoing, we are named defendants or parties in certain other lawsuits, claims or proceedings incidental to our business and are involved from time to time as parties to governmental investigations or proceedings, including matters related to taxation, arising in the ordinary course of business. Although the outcome of such lawsuits or other proceedings cannot be predicted with certainty and the amount of any liability that could arise with respect to such lawsuits or other proceedings cannot be predicted accurately, we do not expect these matters to have a material adverse effect on our financial position, operating results or cash flows.

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Supplemental Financial Information

6 Months Ended

Jun. 30, 2012

Supplemental Financial Information [Abstract]

Supplemental Financial Information

Supplemental Financial Information

Consolidated Balance Sheet Information

Accounts receivable, net, consisted of the following (in millions):

	June 30, 2012			December 31, 2011
Trade	$	838.4		$	816.7
Other	30.4			48.6
	868.8			865.3
Allowance for doubtful accounts	(12.5		)	(13.6		)
	$	856.3		$	851.7

Other current assets consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Inventory	$	203.4	$	201.4
Prepaid taxes	85.2		64.9
Deferred mobilization costs	35.4		43.8
Prepaid expenses	24.0		22.3
Deferred tax assets	10.3		9.8
Marketable securities	—		32.2
Other	19.2		24.5
	$	377.5	$	398.9

Other assets, net, consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Intangible assets	$	170.5	$	197.3
Unbilled reimbursable receivables	98.5		119.4
Prepaid taxes on intercompany transfers of property	62.5		68.8
Supplemental executive retirement plan assets	28.2		25.6
Wreckage and debris removal receivables	19.0		19.8
Deferred mobilization costs	17.9		38.4
Deferred tax assets	16.1		25.9
Other	27.0		26.4
	$	439.7	$	521.6

Accrued liabilities and other consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Personnel costs	$	170.5	$	159.9
Deferred revenue	129.5		111.3
Taxes	99.3		74.0
Accrued interest	68.2		69.4
Wreckage and debris removal	19.0		16.0
Intangible liabilities	—		43.4
Other	53.3		41.7
	$	539.8	$	515.7

Other liabilities consisted of the following (in millions):

	June 30, 2012		December 31, 2011
Intangible liabilities	$	149.0	$	177.8
Deferred revenue	115.4		124.4
Unrecognized tax benefits (inclusive of interest and penalties)	64.1		75.5
Supplemental executive retirement plan liabilities	30.9		30.1
Other	59.9		56.8
	$	419.3	$	464.6

Concentration of Credit Risk

We are exposed to credit risk relating to our receivables from customers, our cash and cash equivalents and investments and our use of derivatives in connection with the management of foreign currency exchange rate risk. We mitigate our credit risk relating to receivables from customers, which consists primarily of major international, government-owned and independent oil and gas companies, by performing ongoing credit evaluations. We also maintain reserves for potential credit losses, which to date have been within management's expectations. We mitigate our credit risk relating to cash and investments by focusing on diversification and quality of instruments. Cash balances are maintained in major, well-capitalized commercial banks. Cash equivalents consist of a portfolio of high-grade instruments. Custody of cash and cash equivalents is maintained at several major financial institutions, and we monitor the financial condition of those financial institutions. We mitigate our credit risk relating to the counterparties of our derivatives by transacting with multiple, high-quality counterparties, thereby limiting exposure to individual counterparties, and by monitoring the financial condition of our counterparties.

During the quarter ended June 30, 2012, Petrobras provided an aggregate $273.0 million, or 25%, of our consolidated revenues, which was attributable to our Deepwater and Midwater segments. During the same period, TOTAL provided an aggregate $94.4 million, or 9%, of our consolidated revenues, which was attributable to our Deepwater segment.

During the six-month period ended June 30, 2012, Petrobras provided an aggregate $531.0 million, or 25%, of our consolidated revenues, which was attributable to our Deepwater and Midwater segments. During the same period, TOTAL provided an aggregate $211.1 million, or 10%, of our consolidated revenues, which was attributable to our Deepwater segment.

During the quarter ended June 30, 2012, revenues provided by our drilling operations in Brazil, Angola and the U.S. Gulf of Mexico totaled $270.3 million, or 25%, $141.7 million, or 13%, and $286.5 million, or 27%, respectively, of our consolidated revenues. Of these amounts, 62%, 95% and 70% were provided by our deepwater drilling operations, respectively. 

During the six-month period ended June 30, 2012, revenues provided by our drilling operations in Brazil, Angola and the U.S. Gulf of Mexico totaled $541.7 million, or 26%, $272.9 million, or 13%, and $539.9 million, or 26%, respectively, of our consolidated revenues. Of these amounts, 65%, 95% and 70% were provided by our deepwater drilling operations, respectively.

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Share-Based Compensation (Details) (Restricted share awards and share unit awards [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Restricted share awards and share unit awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted	843	1,000
Vesting rate		20.00%
Vesting rate for certain officers and non-employee directors		33.00%
Weighted-average grant-date fair value of non-vested awards	$ 44.63	$ 46.75

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Guarantee Of Registered Securities (Condensed Consolidating Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010
Guarantor Obligations [Line Items]
Cash and cash equivalents	$ 226.7	$ 430.7	$ 554.0	$ 1,050.7
Accounts receivable	856.3	851.7
Other	377.5	398.9
Total current assets	1,460.5	1,681.3
PROPERTY AND EQUIPMENT, AT COST	15,311.8	14,483.4
Less accumulated depreciation	2,327.8	2,061.5
Property and equipment, net	12,984.0	12,421.9	12,108.8
GOODWILL	3,274.0	3,274.0
OTHER ASSETS, NET	439.7	521.6
TOTAL ASSETS	18,158.2	17,898.8
Accounts payable and accrued liabilities	1,081.7	1,160.1
Short-term debt	22.0	125.0
Current maturities of long-term debt	47.5	47.5
Total current liabilities	1,151.2	1,332.6
LONG-TERM DEBT	4,838.0	4,877.6
DEFERRED INCOME TAXES	334.3	339.5
OTHER LIABILITIES	419.3	464.6
ENSCO SHAREHOLDERS' EQUITY	11,408.5	10,879.3
NONCONTROLLING INTERESTS	6.9	5.2
Total equity	11,415.4	10,884.5
Total liabilities and shareholders' equity	18,158.2	17,898.8
Ensco Plc [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	21.7	236.6	222.5	3.4
Accounts receivable from affiliates	1,279.7	1,268.4
Other	3.2	2.8
Total current assets	1,304.6	1,507.8
PROPERTY AND EQUIPMENT, AT COST	1.8	1.8
Less accumulated depreciation	0.9	0.7
Property and equipment, net	0.9	1.1
DUE FROM AFFILIATES	2,793.4	2,002.3
INVESTMENTS IN AFFILIATES	12,952.3	12,041.9
OTHER ASSETS, NET	12.6	13.9
TOTAL ASSETS	17,063.8	15,567.0
Accounts payable and accrued liabilities	30.7	30.4
Accounts payable to affiliates	1,581.1	575.1
Short-term debt	22.0	125.0
Total current liabilities	1,633.8	730.5
DUE TO AFFILIATES	2,022.7	2,191.7
LONG-TERM DEBT	2,467.7	2,465.7
OTHER LIABILITIES	6.4
ENSCO SHAREHOLDERS' EQUITY	10,933.2	10,179.1
Total equity	10,933.2	10,179.1
Total liabilities and shareholders' equity	17,063.8	15,567.0
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	17.7		104.2	19.1
Accounts receivable	7.7	0.3
Accounts receivable from affiliates	166.6	89.8
Other	32.2	35.2
Total current assets	224.2	125.3
PROPERTY AND EQUIPMENT, AT COST	29.2	30.6
Less accumulated depreciation	21.8	23.8
Property and equipment, net	7.4	6.8
DUE FROM AFFILIATES	3,413.3	2,486.9
INVESTMENTS IN AFFILIATES	3,137.8	2,966.0
OTHER ASSETS, NET	79.5	83.4
TOTAL ASSETS	6,862.2	5,668.4
Accounts payable and accrued liabilities	35.7	20.0
Accounts payable to affiliates	64.8	606.6
Total current liabilities	100.5	626.6
DUE TO AFFILIATES	2,623.9	1,058.2
LONG-TERM DEBT	149.0	149.0
DEFERRED INCOME TAXES	318.2	326.8
OTHER LIABILITIES	7.5	5.2
ENSCO SHAREHOLDERS' EQUITY	3,663.1	3,502.6
Total equity	3,663.1	3,502.6
Total liabilities and shareholders' equity	6,862.2	5,668.4
Pride International, Inc. [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	10.4	22.6	37.7
Accounts receivable	0.7	5.2
Accounts receivable from affiliates	0	278.2
Other		46.2
Total current assets	11.1	352.2
GOODWILL	2,937.8
DUE FROM AFFILIATES	751.0	313.5
INVESTMENTS IN AFFILIATES	4,998.9	4,802.6
OTHER ASSETS, NET		9.8
TOTAL ASSETS	5,761.0	5,478.1
Accounts payable and accrued liabilities	34.2	27.4
Accounts payable to affiliates	0.1	85.2
Total current liabilities	34.3	112.6
DUE TO AFFILIATES	614.5	401.3
LONG-TERM DEBT	2,056.8	2,072.5
OTHER LIABILITIES	11.6	18.7
ENSCO SHAREHOLDERS' EQUITY	3,043.8	2,873.0
Total equity	3,043.8	2,873.0
Total liabilities and shareholders' equity	5,761.0	5,478.1
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	176.9	171.5	189.6	1,028.2
Accounts receivable	847.9	846.2
Accounts receivable from affiliates	1,583.3	1,194.5
Other	342.1	314.7
Total current assets	2,950.2	2,526.9
PROPERTY AND EQUIPMENT, AT COST	15,280.8	14,451.0
Less accumulated depreciation	2,305.1	2,037.0
Property and equipment, net	12,975.7	12,414.0
GOODWILL	3,274.0	3,274.0
DUE FROM AFFILIATES	5,245.7	3,638.7
OTHER ASSETS, NET	347.6	414.5
TOTAL ASSETS	24,793.2	22,268.1
Accounts payable and accrued liabilities	981.1	1,082.3
Accounts payable to affiliates	1,383.6	1,564.0
Current maturities of long-term debt	47.5	47.5
Total current liabilities	2,412.2	2,693.8
DUE TO AFFILIATES	6,942.3	4,790.2
LONG-TERM DEBT	164.5	190.4
DEFERRED INCOME TAXES	16.1	12.7
OTHER LIABILITIES	393.8	440.7
ENSCO SHAREHOLDERS' EQUITY	14,857.4	14,135.1
NONCONTROLLING INTERESTS	6.9	5.2
Total equity	14,864.3	14,140.3
Total liabilities and shareholders' equity	24,793.2	22,268.1
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
Accounts receivable from affiliates	(3,029.6)	(2,830.9)
Total current assets	(3,029.6)	(2,830.9)
DUE FROM AFFILIATES	(12,203.4)	(8,441.4)
INVESTMENTS IN AFFILIATES	(21,089.0)	(19,810.5)
TOTAL ASSETS	(36,322.0)	(31,082.8)
Accounts payable to affiliates	(3,029.6)	(2,830.9)
Total current liabilities	(3,029.6)	(2,830.9)
DUE TO AFFILIATES	(12,203.4)	(8,441.4)
ENSCO SHAREHOLDERS' EQUITY	(21,089.0)	(19,810.5)
Total equity	(21,089.0)	(19,810.5)
Total liabilities and shareholders' equity	$ (36,322.0)	$ (31,082.8)

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Reconciliation Of Net Income Attributable To Ensco Shares

The following table is a reconciliation of net income attributable to Ensco shares used in our basic and diluted EPS computations for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Net income attributable to Ensco	$	341.3		$	101.9		$	606.7		$	166.5
Net income allocated to restricted shares	(3.5		)	(1.0		)	(6.2		)	(2.0		)
Net income attributable to Ensco shares	$	337.8		$	100.9		$	600.5		$	164.5

Reconciliation Of Weighted-Average Shares Used In Earnings Per Share Computations

The following table is a reconciliation of the weighted-average shares used in our basic and diluted EPS computations for the three-month and six-month periods ended June 30, 2012 and 2011 (in millions):

	Three Months Ended June 30,		Six Months Ended June 30,
	2012	2011	2012	2011
Weighted-average shares - basic	229.2	169.8	229.0	155.6
Potentially dilutive share options	.2	.4	.3	.3
Weighted-average shares - diluted	229.4	170.2	229.3	155.9

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Acquisition Of Pride International, Inc. (Schedule Of Business Acquisition, Provisional Amounts Recorded For Assets Acquired And Liabilities Assumed) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Business Acquisition [Line Items]
Gross contractual amounts receivable	$ 466.7
Amounts Recognized As Of Merger Date [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	147.0
Accounts receivable	371.3	[1]
Other current assets	150.9
Property and equipment	6,758.8
Other assets	343.7
Accounts payable and accrued liabilities and other	539.8
Debt	2,436.0
Deferred income tax liabilities	19.0
Other liabilities	319.8
Net assets acquired	4,457.1
Less merger consideration	7,415.9
Goodwill	2,958.8
Measurement Period Adjustments [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	0	[2]
Accounts receivable	38.1	[1],[2]
Other current assets	32.7	[2]
Property and equipment	(9.4)	[2]
Other assets	27.8	[2]
Accounts payable and accrued liabilities and other	60.6	[2]
Debt	0	[2]
Deferred income tax liabilities	(0.1)	[2]
Other liabilities	7.7	[2]
Net assets acquired	21.0	[2]
Less merger consideration	0	[2]
Goodwill	(21.0)	[2]
Estimated Fair Value [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	147.0
Accounts receivable	409.4	[1]
Other current assets	183.6
Property and equipment	6,749.4
Other assets	371.5
Accounts payable and accrued liabilities and other	600.4
Debt	2,436.0
Deferred income tax liabilities	18.9
Other liabilities	327.5
Net assets acquired	4,478.1
Less merger consideration	7,415.9
Goodwill	$ 2,937.8

[1] Gross contractual amounts receivable totaled $466.7 million as of the Merger Date.

[2] The measurement period adjustments reflect changes in the estimated fair values of certain assets and liabilities, primarily related to inventory, contingencies and income taxes. The measurement period adjustments were recorded to reflect new information obtained about facts and circumstances existing as of the Merger Date and did not result from subsequent intervening events. These adjustments did not have a material impact on our previously reported financial position or results of operations subsequent to the Merger Date; however, we have retrospectively revised our 2011 consolidated financial statements to reflect these adjustments as if they were recorded on the Merger Date.

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Guarantee Of Registered Securities (Condensed Consolidating Statements Of Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Guarantor Obligations [Line Items]
OPERATING REVENUES	$ 1,072.0	$ 564.2	$ 2,098.4	$ 925.7
Contract drilling (exclusive of depreciation)	489.7	286.3	1,009.9	477.9
Depreciation	139.5	83.5	278.9	143.0
General and administrative	35.5	47.4	73.7	77.5
OPERATING INCOME	407.3	147.0	735.9	227.3
OTHER INCOME (EXPENSE), NET	(24.5)	(18.1)	(50.7)	(15.9)
INCOME BEFORE INCOME TAXES	382.8	128.9	685.2	211.4
INCOME TAX PROVISION	40.1	25.3	75.1	42.3
NET INCOME	342.7	103.6	610.1	169.1
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4)	(1.7)	(3.4)	(2.6)
NET INCOME ATTRIBUTABLE TO ENSCO	341.3	101.9	606.7	166.5
Ensco Plc [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES	5.7		33.3
Contract drilling (exclusive of depreciation)	13.2	0.9	26.1	1.6
Depreciation	0.1	0.1	0.2	0.2
General and administrative	13.9	11.5	28.5	24.8
OPERATING INCOME	(21.5)	(12.5)	(21.5)	(26.6)
OTHER INCOME (EXPENSE), NET	(8.9)	(3.0)	(20.1)	0.6
INCOME BEFORE INCOME TAXES	(30.4)	(15.5)	(41.6)	(26.0)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	371.7	117.4	648.3	192.5
NET INCOME	341.3	101.9	606.7	166.5
NET INCOME ATTRIBUTABLE TO ENSCO	341.3	101.9	606.7	166.5
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES	64.7		75.3
Contract drilling (exclusive of depreciation)	64.7		75.3
Depreciation	0.9	0.2	1.7	0.5
General and administrative	0.1		0.1
OPERATING INCOME	(1.0)	(0.2)	(1.8)	(0.5)
OTHER INCOME (EXPENSE), NET	(5.6)	(0.6)	(5.9)	(0.8)
INCOME BEFORE INCOME TAXES	(6.6)	(0.8)	(7.7)	(1.3)
INCOME TAX PROVISION	21.7	13.7	32.9	19.3
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	81.4	54.7	125.6	120.9
NET INCOME	53.1	40.2	85.0	100.3
NET INCOME ATTRIBUTABLE TO ENSCO	53.1	40.2	85.0	100.3
Pride International, Inc. [Member]
Guarantor Obligations [Line Items]
OTHER INCOME (EXPENSE), NET	(14.9)	(3.6)	(26.6)	(3.6)
INCOME BEFORE INCOME TAXES	(14.9)	(3.6)	(26.6)	(3.6)
INCOME TAX PROVISION	7.0	(1.3)	7.0	(1.3)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	97.1	18.4	176.8	18.4
NET INCOME	75.2	16.1	143.2	16.1
NET INCOME ATTRIBUTABLE TO ENSCO	75.2	16.1	143.2	16.1
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES	1,110.3	564.7	2,159.1	926.5
Contract drilling (exclusive of depreciation)	520.5	285.9	1,077.8	477.1
Depreciation	138.5	83.2	277.0	142.3
General and administrative	21.5	35.9	45.1	52.7
OPERATING INCOME	429.8	159.7	759.2	254.4
OTHER INCOME (EXPENSE), NET	4.9	(10.9)	1.9	(12.1)
INCOME BEFORE INCOME TAXES	434.7	148.8	761.1	242.3
INCOME TAX PROVISION	11.4	12.9	35.2	24.3
NET INCOME	423.3	135.9	725.9	218.0
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4)	(1.7)	(3.4)	(2.6)
NET INCOME ATTRIBUTABLE TO ENSCO	421.9	134.2	722.5	215.4
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES	(108.7)	(0.5)	(169.3)	(0.8)
Contract drilling (exclusive of depreciation)	(108.7)	(0.5)	(169.3)	(0.8)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	(550.2)	(190.5)	(950.7)	(331.8)
NET INCOME	(550.2)	(190.5)	(950.7)	(331.8)
NET INCOME ATTRIBUTABLE TO ENSCO	$ (550.2)	$ (190.5)	$ (950.7)	$ (331.8)

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Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)	3 Months Ended
	Jun. 30, 2012 rigs
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	77	[1]
Deepwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	23
Midwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	6
Jackup [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	47
Other [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	1
North & South America (Excl. Brazil) [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	20	[1]
North & South America (Excl. Brazil) [Member] | Deepwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	6
North & South America (Excl. Brazil) [Member] | Midwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
North & South America (Excl. Brazil) [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	14
North & South America (Excl. Brazil) [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
Brazil [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	11	[1]
Brazil [Member] | Deepwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	6
Brazil [Member] | Midwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	5
Brazil [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
Brazil [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
Europe & Mediterranean [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	9	[1]
Europe & Mediterranean [Member] | Deepwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	1
Europe & Mediterranean [Member] | Midwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
Europe & Mediterranean [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	8
Europe & Mediterranean [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
Middle East & Africa [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	16	[1]
Middle East & Africa [Member] | Deepwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	4
Middle East & Africa [Member] | Midwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	1
Middle East & Africa [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	11
Middle East & Africa [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
Asia & Pacific Rim [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	14	[1]
Asia & Pacific Rim [Member] | Deepwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	2
Asia & Pacific Rim [Member] | Midwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
Asia & Pacific Rim [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	11
Asia & Pacific Rim [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	1
Asia & Pacific Rim (under construction) [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	7	[1]
Asia & Pacific Rim (under construction) [Member] | Deepwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	4
Asia & Pacific Rim (under construction) [Member] | Midwater [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0
Asia & Pacific Rim (under construction) [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	3
Asia & Pacific Rim (under construction) [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs (in rigs)	0

[1] We have three deepwater drilling management contracts not included in the table above.

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Condensed Consolidated Balance Sheets (Parenthetical)	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Class A ordinary shares, U.S. [Member] USD ($)	Dec. 31, 2011 Class A ordinary shares, U.S. [Member] USD ($)	Jun. 30, 2012 Common Class B, Par Value In GBP [Member] GBP (£)	Dec. 31, 2011 Common Class B, Par Value In GBP [Member] GBP (£)
Common stock, par value per share (in dollars per share or pounds sterling per share)			$ 0.10	$ 0.10	£ 1	£ 1
Common shares, shares authorized (in shares)			450,000,000	450,000,000	50,000	50,000
Common shares, shares issued (in shares)			237,700,000	237,700,000	50,000	50,000
Treasury shares, shares held (in shares)	5,600,000	4,900,000

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Derivative Instruments

6 Months Ended

Jun. 30, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

Our functional currency is the U.S. dollar. As is customary in the oil and gas industry, a majority of our revenues are denominated in U.S. dollars; however, a portion of the revenues earned and expenses incurred by some of our subsidiaries are denominated in currencies other than the U.S. dollar ("foreign currencies"). These transactions are remeasured in U.S. dollars based on a combination of both current and historical exchange rates. We use foreign currency forward contracts ("derivatives") to reduce our exposure to various market risks, primarily foreign currency exchange rate risk.

All derivatives were recorded on our condensed consolidated balance sheets at fair value. Accounting for the gains and losses resulting from changes in the fair value of derivatives depends on the use of the derivative and whether it qualifies for hedge accounting.  Net assets of $800,000 and net liabilities of $7.1 million associated with our foreign currency derivatives were included in our condensed consolidated balance sheets as of June 30, 2012 and December 31, 2011, respectively.  All of our derivatives mature during the next 18 months.  See "Note 3 - Fair Value Measurements" for additional information on the fair value measurement of our derivatives.

Derivatives recorded at fair value in our condensed consolidated balance sheets consisted of the following (in millions):

	Derivative Assets				Derivative Liabilities
	June 30, 2012		December 31, 2011		June 30, 2012		December 31, 2011
Derivatives Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	$	2.2	$	.2	$	3.0	$	7.1
Foreign currency forward contracts - non-current(2)	.1		.1		.1		.1
	2.3		.3		3.1		7.2
Derivatives Not Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	1.9		—		.3		.2
	1.9		—		.3		.2
Total	$	4.2	$	.3	$	3.4	$	7.4

(1) Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets.

(2) Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets, net, and other liabilities, respectively, on our condensed consolidated balance sheets.

We utilize cash flow hedges to hedge forecasted foreign currency denominated transactions, primarily to reduce our exposure to foreign currency exchange rate risk associated with contract drilling expenses and capital expenditures denominated in various currencies. As of June 30, 2012, we had cash flow hedges outstanding to exchange an aggregate $305.0 million for various foreign currencies, including $126.3 million for British pounds, $83.9 million for Singapore dollars, $35.8 million for Brazilian reals, $27.6 million for Australian dollars, $25.8 million for euros and $5.6 million for other currencies.

Gains and losses, net of tax, on derivatives designated as cash flow hedges included in our condensed consolidated statements of income were as follows (in millions):

Three Months Ended June 30, 2012 and 2011

Derivatives Designated as Cash Flow Hedges	Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)					Gain (Loss) Reclassified  from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)					Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(1)
	2012			2011		2012		2011			2012		2011
Interest rate lock contracts(2)	$	—		$	—	$	.1	$	(.2	)	$	—	$	—
Foreign currency forward contracts(3)	(0.1		)	3.1		.7		1.7			1.0		1.1
Total	$	(0.1	)	$	3.1	$	.8	$	1.5		$	1.0	$	1.1

Six Months Ended June 30, 2012 and 2011

Derivatives Designated as Cash Flow Hedges	Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)				Gain (Loss) Reclassified  from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)					Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(1)
	2012		2011		2012		2011			2012		2011
Interest rate lock contracts(2)	$	—	$	—	$	.2	$	(.3	)	$	—	$	—
Foreign currency forward contracts(3)	6.2		6.0		.7		2.6			.2		.7
Total	$	6.2	$	6.0	$	.9	$	2.3		$	.2	$	.7

(1) Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our condensed consolidated statements of income.

(2) Losses on derivatives reclassified from AOCI into income (effective portion) were included in interest expense in our condensed consolidated statements of income.

(3) Gains and losses on derivatives reclassified from AOCI into income (effective portion) were included in contract drilling expense in our condensed consolidated statements of income.

We have net assets and liabilities denominated in numerous foreign currencies and use various methods to manage our exposure to foreign currency exchange rate risk. We predominantly structure our drilling contracts in U.S. dollars, which significantly reduces the portion of our cash flows and assets denominated in foreign currencies. We occasionally enter into derivatives that hedge the fair value of recognized foreign currency denominated assets or liabilities but do not designate such derivatives as hedging instruments.  In these situations, a natural hedging relationship generally exists whereby changes in the fair value of the derivatives offset changes in the fair value of the underlying hedged items. As of June 30, 2012, we held derivatives not designated as hedging instruments to exchange an aggregate $75.5 million for various foreign currencies, including $16.7 million for Swiss francs, $16.3 million for euros, $12.5 million for Australian dollars, $11.2 million for British pounds and $18.8 million for other currencies.

Net gains of $800,000 and $300,000 associated with our derivatives not designated as hedging instruments were included in other, net, in our condensed consolidated statements of income for the three-month periods ended June 30, 2012 and 2011, respectively. Net gains of $1.7 million and $500,000 associated with our derivatives not designated as hedging instruments were included in other income, net, in our condensed consolidated statements of income for the six-month periods ended June 30, 2012 and 2011, respectively.

As of June 30, 2012, the estimated amount of net losses associated with derivative instruments, net of tax, that would be reclassified to earnings during the next twelve months totaled $700,000.

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Acquisition Of Pride International, Inc. (Schedule Of Goodwill Recognized) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Business Acquisition [Line Items]
Total	$ 3,274.0	$ 3,274.0
Pride International, Inc. [Member]
Business Acquisition [Line Items]
Total	2,937.8
Deepwater [Member] | Pride International, Inc. [Member]
Business Acquisition [Line Items]
Total	2,467.5
Midwater [Member] | Pride International, Inc. [Member]
Business Acquisition [Line Items]
Total	470.3
Jackup [Member] | Pride International, Inc. [Member]
Business Acquisition [Line Items]
Total	$ 0

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Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended		6 Months Ended		6 Months Ended	1 Months Ended
	Apr. 30, 2012 payments	Mar. 31, 2009 mi	Jun. 30, 2012 plaintiffs	Sep. 30, 2009	Jun. 30, 2012 Brazil [Member]	Jul. 31, 2009 Spain [Member]
Oil and Gas Delivery Commitments and Contracts [Line Items]
Distance from original drilling location in miles		95
Leg and debris removal costs	$ 19.0
Number of payments related to leg and debris removal costs	9
Liability and insurance receivable for ENSCO 74 leg removal costs			19.0
Civil litigation claim damages for cost of repair and business interruption due to pipeline rupture				26.0
Civil litigation damages		10.0
Liability insurance self-insured retention per occurrence			10.0
Annual liability coverage limit for wreckage and debris removal costs			500.0
Liability insurance self-insured retention			15.0
Liability insurance self insured retention for each occurrence thereafter			1.0
Number of plaintiffs			100
Aggregate amount of fine sought by governmental authorities					3
Environmental liabilities			3
Aggregate amount of pending administrative proceeding raised by governmental authority						$ 4

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Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule Of Derivatives At Fair Value

Derivatives recorded at fair value in our condensed consolidated balance sheets consisted of the following (in millions):

	Derivative Assets				Derivative Liabilities
	June 30, 2012		December 31, 2011		June 30, 2012		December 31, 2011
Derivatives Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	$	2.2	$	.2	$	3.0	$	7.1
Foreign currency forward contracts - non-current(2)	.1		.1		.1		.1
	2.3		.3		3.1		7.2
Derivatives Not Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	1.9		—		.3		.2
	1.9		—		.3		.2
Total	$	4.2	$	.3	$	3.4	$	7.4

(1) Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets.

(2) Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets, net, and other liabilities, respectively, on our condensed consolidated balance sheets.

Gains And Losses On Derivatives Designated As Cash Flow Hedges

Gains and losses, net of tax, on derivatives designated as cash flow hedges included in our condensed consolidated statements of income were as follows (in millions):

Three Months Ended June 30, 2012 and 2011

Derivatives Designated as Cash Flow Hedges	Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)					Gain (Loss) Reclassified  from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)					Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(1)
	2012			2011		2012		2011			2012		2011
Interest rate lock contracts(2)	$	—		$	—	$	.1	$	(.2	)	$	—	$	—
Foreign currency forward contracts(3)	(0.1		)	3.1		.7		1.7			1.0		1.1
Total	$	(0.1	)	$	3.1	$	.8	$	1.5		$	1.0	$	1.1

Six Months Ended June 30, 2012 and 2011

Derivatives Designated as Cash Flow Hedges	Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)				Gain (Loss) Reclassified  from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)					Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(1)
	2012		2011		2012		2011			2012		2011
Interest rate lock contracts(2)	$	—	$	—	$	.2	$	(.3	)	$	—	$	—
Foreign currency forward contracts(3)	6.2		6.0		.7		2.6			.2		.7
Total	$	6.2	$	6.0	$	.9	$	2.3		$	.2	$	.7

(1) Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our condensed consolidated statements of income.

(2) Losses on derivatives reclassified from AOCI into income (effective portion) were included in interest expense in our condensed consolidated statements of income.

(3) Gains and losses on derivatives reclassified from AOCI into income (effective portion) were included in contract drilling expense in our condensed consolidated statements of income.