10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

  Washington, D.C. 20549  

FORM 10-K

(Mark One)

ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE  SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2014

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.) W1J5BQ (Zip Code)

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

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Class A Ordinary Shares, U.S. $0.10 par value 4.50% Senior Notes due 2024 5.75% Senior Notes due 2044 3.25% Senior Notes due 2016 4.70% Senior Notes due 2021 Name of each exchange on which registered New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer as defined in Rule 405 of the Securities Act.        Yes ý       No  o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.   Yes  o       No ý

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 ý       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 (S232.405 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  ý       No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (S229.405) is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  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 (Check one):

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 Act).

Yes o        No ý

The aggregate market value of the Class A ordinary shares (based upon the closing price on the New York Stock Exchange on June 30, 2014 of $55.57) of Ensco plc held by non-affiliates of Ensco plc at that date was approximately $11,554,518,000.

As of February 24, 2015, there were 234,172,524 Class A ordinary shares of Ensco plc issued and outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Company's Proxy Statement for the 2015 General Meeting of Shareholders are incorporated by reference into Part III of this report.

TABLE OF CONTENTS
PART I	ITEM 1.	BUSINESS	4
	ITEM 1A.	RISK FACTORS	15
	ITEM 1B.	UNRESOLVED STAFF COMMENTS	35
	ITEM 2.	PROPERTIES	36
	ITEM 3.	LEGAL PROCEEDINGS	38
	ITEM 4.	MINE SAFETY DISCLOSURES	40
PART II	ITEM 5.	MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED SHAREHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES	41
	ITEM 6.	SELECTED FINANCIAL DATA	47
	ITEM 7.	MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	49
	ITEM 7A.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	77
	ITEM 8.	FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA	77
	ITEM 9.	CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE	136
	ITEM 9A.	CONTROLS AND PROCEDURES	136
	ITEM 9B.	OTHER INFORMATION	136
PART III	ITEM 10.	DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE	137
	ITEM 11.	EXECUTIVE COMPENSATION	137
	ITEM 12.	SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED SHAREHOLDER MATTERS	138
	ITEM 13.	CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE	138
	ITEM 14.	PRINCIPAL ACCOUNTING FEES AND SERVICES	138
PART IV	ITEM 15.	EXHIBITS, FINANCIAL STATEMENT SCHEDULES	139
		SIGNATURES	147

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, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended.  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 areas, which may result in expropriation, nationalization, confiscation or deprivation of our assets or suspension and/or termination of contracts based on force majeure events;

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

• possible cancellation or suspension of drilling contracts as a result of mechanical difficulties, performance or other reasons;

• 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 execute definitive contracts following announcements of letters of intent;

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• governmental regulatory, legislative and permitting requirements 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;

• 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 ability to obtain financing and pursue other business opportunities may be limited by our debt levels and debt agreement restrictions;

• our ability to realize expected benefits from the 2009 redomestication as a U.K. public limited company and the related reorganization of Ensco’s corporate structure, 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;

• delays in contract commencement dates or the cancellation of drilling programs by operators;

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

• potential long-lived asset and/or goodwill impairments.

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 this Form 10-K.  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

Item 1.  Business

General

Ensco plc is a global offshore contract drilling company. Unless the context requires otherwise, the terms "Ensco," "Company," "we," "us" and "our" refer to Ensco plc together with all its subsidiaries and predecessors.

We are one of the leading providers of offshore contract drilling services to the international oil and gas industry. We currently own and operate an offshore drilling rig fleet of 70 rigs, including seven rigs currently under construction, with drilling operations in most of the strategic markets around the globe. Our rig fleet includes ten drillships, 13 dynamically positioned semisubmersible rigs, five moored semisubmersible rigs and 42 jackup rigs. Our fleet is the world's second largest amongst competitive rigs, our ultra-deepwater fleet is one of the newest in the industry, and our premium jackup fleet is the largest of any offshore drilling company.

Our customers include many of the leading national and international oil companies, in addition to many independent operators. We are among the most geographically diverse offshore drilling companies, with current operations and drilling contracts spanning approximately 20 countries on six continents in nearly every major offshore basin around the world. The markets in which we operate include the U.S. Gulf of Mexico, Mexico, Brazil, the Mediterranean, the North Sea, the Middle East, West Africa, Australia and Southeast Asia.

We provide drilling services on a "day rate" contract basis. Under day rate contracts, we provide a drilling rig and rig crews and receive a fixed amount per day for each day we are performing drilling or related services. Our customers bear substantially all of the ancillary costs of constructing the well and supporting drilling operations, as well as the economic risk relative to the success of the well. In addition, our customers may pay all or a portion of the cost of moving our equipment and personnel to and from the well site. We do not provide "turnkey" or other risk-based drilling services.

Acquisitions

We have grown our rig fleet through corporate acquisitions and new rig construction. A total of seven drillships, ten semisubmersible rigs and 25 jackup rigs in our current fleet were obtained through the acquisitions of Penrod Holding Corporation during 1993, Dual Drilling Company during 1996, Chiles Offshore Inc. during 2002 and Pride International, Inc. ("Pride") during 2011.  Through the acquisition of Pride, we added drillships to our asset base and increased our presence in Angola and Brazil.

Drilling Rig Construction and Delivery

We remain focused on our long-established strategy of high-grading our fleet. We will continue to invest in the expansion of our fleet where we believe strategic opportunities exist.  During the three-year period ended December 31, 2014, we invested $3.3 billion in the construction of new drilling rigs.

During the second quarter, we entered into an agreement with Lamprell Energy Limited to construct two premium jackup rigs. ENSCO 140 and ENSCO 141 are significantly enhanced versions of the LeTorneau Super 116E jackup design and will incorporate Ensco's patented Canti-Leverage Advantage^SM technology. These rigs are scheduled for delivery during the second quarter and the third quarter of 2016, respectively. Both of these rigs are currently uncontracted.

During 2013, we entered into agreements with KFELS to construct a premium jackup rig (ENSCO 110) and an ultra-premium harsh environment jackup rig (ENSCO 123). These rigs are scheduled for delivery during the first quarter of 2015 and the second quarter of 2016, respectively. Both of these rigs are currently uncontracted.

We previously entered into agreements with KFELS to construct three ultra-premium harsh environment jackup rigs (ENSCO 120, ENSCO 121 and ENSCO 122). ENSCO 122 was delivered during the third quarter of 2014 and commenced drilling operations under a long-term contract in the North Sea during the fourth quarter of 2014. ENSCO

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121 was delivered during the fourth quarter of 2013 and commenced drilling operations under a long-term contract in the North Sea during the second quarter. ENSCO 120 was delivered during the third quarter of 2013 and commenced drilling operations under a long-term contract in the North Sea during the first quarter.

We currently have three ultra-deepwater drillships under construction (ENSCO DS-8, ENSCO DS-9 and ENSCO DS-10). ENSCO DS-9 and ENSCO DS-8 are committed under long-term contracts and currently scheduled for delivery during the first quarter and second quarter of 2015, respectively. ENSCO DS-10 is currently uncontracted and scheduled to be delivered by the shipyard during the third quarter of 2015.

We expect that cash flow generated during 2015 will primarily be used to fund capital expenditures, most notably milestone payments for newbuild rigs. Based on our balance sheet and contractual backlog of $9.7 billion, we believe future capital projects, debt service and dividend payments will primarily be funded from cash and cash equivalents, future operating cash flows and borrowings under our commercial paper program and/or revolving credit facility. We may decide to access debt and/or equity markets to raise additional capital, refinance existing debt or increase liquidity as necessary.

Divestitures

Our business strategy has been to focus on ultra-deepwater floater and premium jackup operations and de-emphasize other assets and operations considered to be non-core or that do not meet our standards for financial performance. Consistent with this strategy, we sold eleven jackup rigs, two moored semisubmersible rigs and our last remaining barge rig during the three-year period ended December 31, 2014. We are currently marketing for sale an additional seven rigs, which were classified as "held for sale" in our financial statements as of December 31, 2014.

Redomestication

Our predecessor, ENSCO International Incorporated ("Ensco Delaware"), was formed as a Texas corporation during 1975 and reincorporated in Delaware during 1987.  During 2009, we completed a reorganization of the corporate structure of the group of companies controlled by Ensco Delaware, pursuant to which an indirect, wholly-owned subsidiary merged with Ensco Delaware, and Ensco plc became our publicly-held parent company incorporated under the Laws of England and Wales (the "redomestication").

The redomestication was accounted for as an internal reorganization of entities under common control and, therefore, Ensco Delaware's assets and liabilities were accounted for at their historical cost basis and not revalued in the transaction. We remain subject to the U.S. Securities and Exchange Commission ("SEC") reporting requirements, the mandates of the Sarbanes-Oxley Act of 2002, as amended, and the applicable corporate governance rules of the New York Stock Exchange ("NYSE"). We continue to report our consolidated financial results in U.S. dollars and in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"), but must also comply with reporting requirements under English law.

Our principal executive office is located at 6 Chesterfield Gardens, London W1J5BQ, England, United Kingdom, and our telephone number is +44 (0) 20 7659 4660.  Our website is www.enscoplc.com.  Information contained on our website is not included as part of, or incorporated by reference into, this report.

Contract Drilling Operations

Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

We currently own and operate an offshore drilling rig fleet of 70 rigs, including seven rigs under construction. Our rig fleet includes ten drillships, 13 dynamically positioned semisubmersible rigs, five moored semisubmersible rigs and 42 jackup rigs.  Of our 70 rigs, 17 are currently located in North and South America (excluding Brazil), 17 are located in the Middle East and Africa (including two rigs under construction), 17 are located in the Asia Pacific rim (including five rigs under construction), 15 are located in Europe and the Mediterranean and four are located in Brazil.

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Our drilling rigs drill and complete oil and natural gas wells. Demand for our drilling services is based upon many factors beyond our control. See “Item 1A. Risk Factors - The success of our business largely depends on the level of activities in the oil and gas industry, which can be significantly affected by volatile oil and natural gas prices.”

Our drilling contracts are the result of negotiations with our customers, and most contracts are awarded upon competitive bidding. The terms of our drilling contracts can vary significantly, but generally contain the following commercial terms:

• contract duration extending over a specific period of time or a period necessary to drill one or more wells,

• term extension options in favor of our customer, generally exercisable upon advance notice to us, at mutually agreed, indexed or fixed rates,

• provisions permitting early termination of the contract (i) if the rig is lost or destroyed (ii) by the customer if operations are suspended for a specified period of time due to breakdown of major rig equipment, unsatisfactory performance, "force majeure" events beyond the control of either party or other specified conditions or (iii) at the convenience (without cause) of the customer (in certain cases obligating the customer to pay us an early termination fee),

• payment of compensation to us (generally in U.S. dollars although some contracts require a portion of the compensation to be paid in local currency) on a "day work" basis such that we receive a fixed amount for each day ("day rate") that the drilling unit is operating under contract (lower rates or no payments ("zero rate") generally apply during periods of equipment breakdown and repair, during re-drilling lost or damaged portions of wells or suspension of operations due to unsatisfactory performance or in the event operations are suspended or interrupted by other specified conditions, some of which may be beyond our control), 

• payment by us of the operating expenses of the drilling unit, including crew labor and incidental rig supply costs, and

• provisions in term contracts allowing us to recover certain labor and other operating cost increases, and certain cost increases due to changes in law, from our customers through day rate adjustment or direct reimbursement.    

Financial information regarding our operating segments and geographic regions is presented in Note 13 to our consolidated financial statements included in "Item 8. Financial Statements and Supplementary Data." Additional financial information regarding our operating segments is presented in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations."

Backlog Information

Our contract drilling backlog reflects firm commitments, represented by signed drilling contracts, and was calculated by multiplying the contracted day rate by the contract period. The contracted day rate excludes certain types of lump sum fees for rig mobilization, demobilization, contract preparation, as well as customer reimbursables and bonus opportunities. Contract backlog was adjusted for drilling contracts signed or terminated after each respective balance sheet date but prior to filing each of our annual reports on Form 10-K on March 2, 2015 and February 26, 2014, respectively.

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The following table summarizes our contract backlog of business as of December 31, 2014 and 2013 (in millions):

	2014		2013
Floaters	$	6,756.1	$	7,903.2
Jackups	2,743.8		2,781.1
Other	190.0		59.2
Total	$	9,689.9	$	10,743.5

Our Floaters segment backlog declined by $1.1 billion, primarily due to revenues realized during 2014, partially offset by new contract additions in the U.S. Gulf of Mexico. Backlog for our Jackups segment declined by $37.3 million, primarily due to revenues realized during 2014 and certain contract terminations, partially offset by new contract additions in the Middle East and North Sea.

The following table summarizes our contract backlog of business as of December 31, 2014 and the periods in which such revenues are expected to be realized (in millions):

	2015		2016		2017		2018 and Beyond		Total
Floaters	$	2,453.8	$	2,030.5	$	1,221.9	$	1,049.9	$	6,756.1
Jackups	1,274.3		738.5		466.6		264.4		2,743.8
Other	160.3		29.7		—		—		190.0
Total	$	3,888.4	$	2,798.7	$	1,688.5	$	1,314.3	$	9,689.9

Our drilling contracts generally contain provisions permitting early termination of the contract (i) if the rig is lost or destroyed or (ii) by the customer if operations are suspended for a specified period of time due to breakdown of major rig equipment, unsatisfactory performance, "force majeure" events beyond the control of either party or other specified conditions.  In addition, some of our drilling contracts permit early termination of the contract by the customer for convenience (without cause), generally exercisable upon advance notice to us and in some cases without making an early termination payment to us.  There can be no assurances that our customers will be able to or willing to fulfill their contractual commitments to us.  

The recent decline in oil prices, the perceived risk of a further decline in oil prices, and the resulting downward pressure on utilization are causing some customers to consider early termination of select contracts despite having to pay onerous early termination fees in some cases. We are currently in discussions with some of our customers regarding these issues. Customers may request to re-negotiate the terms of existing contracts, or they may request early termination in some circumstances. Therefore, the amount of actual revenues earned and the actual periods during which revenues are earned will be different from amounts disclosed in our backlog calculations due to a lack of predictability of various factors, including newbuild rig delivery dates, unscheduled repairs, maintenance requirements, weather delays, contract terminations or renegotiations and other factors. See "Item 1A. Risk Factors - Our current backlog of contract drilling revenue may not be fully realized, which may have a material adverse effect on our financial position, results of operations or cash flows” and “Item 1A. Risk Factors - We may suffer losses if our customers terminate or seek to renegotiate our contracts, if operations are suspended or interrupted or if a rig becomes a total loss.”

Drilling Contracts and Insurance Program

Our drilling contracts provide for varying levels of indemnification from our customers, including with respect to damages from well control events. 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 twelve-month

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policy periods, and the next renewal date for a substantial portion of our insurance program is scheduled for May 31, 2015.

Our insurance program provides coverage in accordance with the policies' terms and conditions, to the extent not otherwise paid by the customer under the indemnification provisions of the drilling contract, for liability for well control events, third-party claims arising from damages from well control events, named windstorms and other third-party claims relating to our operations, 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 per occurrence deductible of $10.0 million or less.

Well control 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 well control 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 well control costs. Our program provides coverage for liability resulting from pollution originating from our rigs 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. Due to the significant premium, high deductible and limited coverage, we decided not to purchase windstorm insurance for our jackup and floating rigs in the U.S. Gulf of Mexico. Accordingly, we have retained the risk for windstorm damage to our eight jackup and nine floating rigs in the U.S. Gulf of Mexico.

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 allocated so that we and our customers each 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 of our customers resulting from our negligence, subject to negotiated caps on a per occurrence or per event basis.  In other contracts, we are not indemnified by our customers for damage to their property and the property of their other contractors, or the enforceability of our indemnity may be limited or prohibited by applicable law in cases of gross negligence or willful misconduct. Accordingly, we could be liable for any such damage under applicable law. In addition, our customers typically indemnify us, generally based on replacement cost minus some level of depreciation, for damage to our down-hole equipment, and in some cases for all or a limited amount of the replacement cost of our subsea equipment, unless the damage is caused by our negligence, normal wear and tear, or defects in the equipment.

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 when the source of the pollution originates 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 on a per occurrence or per event basis and/or for the term of the contract or our indemnity may be limited or unenforceable under applicable law in cases of gross negligence or willful misconduct, and in some drilling contracts we assume liability for all fines and penalties.  As a result, 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 (including punitive 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

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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.

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 and the interpretation and enforcement of applicable law when the claim is adjudicated. 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 or willful misconduct, where punitive damages are assessed against us, or where any fines and/or penalties are imposed directly against us. In addition, under the laws of certain jurisdictions, the courts may enforce an indemnity obligation between the contracting parties with respect to claims by a third party where the underlying claim is the result of gross negligence, but will not enforce an indemnity and allow a party to be indemnified for its gross negligence for claims of the other contracting party that is deemed to be a release. 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.

In certain cases, vendors who provide equipment or services to us limit their pollution liability to a specific monetary cap, and we assume the liability above that cap. Typically, in the case of original equipment manufacturers, the cap is a negotiated amount based on mutual agreement of the parties considering the risk profiles and thresholds of each party. However, for smaller vendors, the liability is usually limited to the value, or double the value, of the contract.

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. Our contracts generally provide that, in the event of any such spill from our rigs, we are responsible for fines and penalties.

Major Customers

We provide our contract drilling services to major international, government-owned and independent oil and gas companies. During 2014, our five largest customers accounted for 49% of consolidated revenues, and BP, our largest customer, accounted for 16% of consolidated revenues.

Competition

The offshore contract drilling industry is highly competitive. Drilling contracts are, for the most part, awarded on a competitive bid basis. Price competition is often the primary factor in determining which contractor is awarded a contract, although quality of service, operational and safety performance, equipment suitability and availability, location of equipment, reputation and technical expertise also are factors.  We have numerous competitors in the offshore contract drilling industry with significant resources.

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Governmental Regulation

Our operations are affected by political developments and by laws and regulations that relate directly to the oil and gas industry, including laws and regulations that have or may impose increased financial responsibility and oil spill abatement contingency plan capability requirements. Accordingly, we will be directly affected by the approval and adoption of laws and regulations curtailing exploration and development drilling for oil and natural gas for economic, environmental, safety or other policy reasons. It is also possible that these laws and regulations could adversely affect our operations in the future by significantly increasing our operating costs.  See "Item 1A. Risk Factors- Increasing regulatory complexity could adversely impact the costs associated with our offshore drilling operations."

Environmental Matters

Our operations are subject to laws and regulations controlling the discharge of materials into the environment, pollution, contamination and hazardous waste disposal or otherwise relating to the protection of the environment. Environmental laws and regulations specifically applicable to our business activities could impose significant liability on us for damages, clean-up costs, fines and penalties in the event of oil spills or similar discharges of pollutants or contaminants into the environment or improper disposal of hazardous waste generated in the course of our operations, which may not be covered by contractual indemnification or insurance and could have a material adverse effect on our financial position, operating results and cash flows.  To date, such laws and regulations have not had a material adverse effect on our operating results, and we have not experienced an accident that has exposed us to material liability arising out of or relating to discharges of pollutants into the environment.  However, the legislative, judicial and regulatory response to any well incidents could substantially increase our customers' liabilities in respect of oil spills and also could increase our liabilities. In addition to potential increased liabilities, such legislative, judicial or regulatory action could impose increased financial, insurance or other requirements that may adversely impact the entire offshore drilling industry.

The International Convention on Oil Pollution Preparedness, Response and Cooperation, the U.K. Merchant Shipping Act 1995, Marpol 73/78, the U.K. Merchant Shipping (Oil Pollution Preparedness, Response and Cooperation Convention) Regulations 1998 and other related legislation and regulations and the Oil Pollution Act of 1990 ("OPA 90"), as amended, The Clean Water Act, and other U.S. federal statutes applicable to us and our operations, as well as similar statutes in Texas, Louisiana, other coastal states and other non-U.S. jurisdictions, address oil spill prevention, reporting and control and significantly expand liability, fine and penalty exposure across many segments of the oil and gas industry. Such statutes and related regulations impose a variety of obligations on us related to the prevention of oil spills, disposal of waste and liability for resulting damages. For instance, OPA 90 imposes strict and, with limited exceptions, joint and several liability upon each responsible party for oil removal costs as well as a variety of fines, penalties and damages. Similar environmental laws apply in our other areas of operation. Failure to comply with these statutes and regulations, including OPA 90, may subject us to civil or criminal enforcement action, which may not be covered by contractual indemnification or insurance and could have a material adverse effect on our financial position, operating results and cash flows.

Events in recent years, including the Macondo well incident, have heightened governmental and environmental concerns about the oil and gas industry. From time to time, legislative proposals have been introduced that would materially limit or prohibit offshore drilling in certain areas.  We are adversely affected by restrictions on drilling in certain areas of the U.S. Gulf of Mexico and elsewhere, including the conditions for lifting the moratorium/suspension in the U.S. Gulf of Mexico, the adoption of associated new safety requirements and policies regarding the approval of drilling permits, restrictions on development and production activities in the U.S. Gulf of Mexico that have and may further impact our operations. As a result of Macondo, BSEE, formerly BOEMRE, which was previously MMS, issued a drilling safety rule in 2012 that included requirements for the cementing of wells, well control barriers, blowout preventers, well-control fluids, well completions, workovers and de-commissioning operations. In addition, BSEE has issued regulations requiring operators to have safety and environmental management systems ("SEMS") prior to conducting operations. Although drilling contractors are not currently required to enter into bridging documents which provide how the drilling contractors will assist the operator in compliance with their SEMS obligations. In addition, in August 2012, BSEE issued Interim Policy Document stating that it would begin issuing Incidents of Non-Compliance ("INC's") to operators for serious violations of BSEE regulations. Although we have not yet incurred any material

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exposure from such regulations/decisions, the issuance of INC's could potentially make it easier for a successful assertion of third party claims against us. If new laws are enacted or other government actions are taken that restrict or prohibit offshore drilling in our principal areas of operation or impose environmental protection requirements that materially increase the liabilities, financial requirements or operating or equipment costs associated with offshore drilling, exploration, development or production of oil and natural gas, our financial position, operating results and cash flows could be materially adversely affected.  See "Item 1A. Risk Factors - Compliance with or breach of environmental laws can be costly and could limit our operations." 

Non-U.S. Operations

Revenues from non-U.S. operations were 62%, 61% and 65% of our total consolidated revenues during 2014, 2013 and 2012, respectively. Our non-U.S. operations and shipyard rig construction and enhancement projects are subject to political, economic and other uncertainties, including:

• terrorist acts, war and civil disturbances,

• expropriation, nationalization, deprivation or confiscation of our equipment,

• expropriation or nationalization of a customer's property or drilling rights,

• repudiation or nationalization of contracts,

• assaults on property or personnel,

• piracy, kidnapping and extortion demands,

• significant governmental influence over many aspects of local economies,

• unexpected changes in law and regulatory requirements, including changes in interpretation or enforcement of existing laws,

• work stoppages,

• complications associated with repairing and replacing equipment in remote locations,

• limitations on insurance coverage, such as war risk coverage, in certain areas,

• imposition of trade barriers,

• wage and price controls,

• import-export quotas,

• exchange restrictions,

• currency fluctuations,

• changes in monetary policies,

• uncertainty or instability resulting from hostilities or other crises in the Middle East, West Africa, Latin America or other geographic areas in which we operate,

• changes in the manner or rate of taxation,

• limitations on our ability to recover amounts due,

• increased risk of government and vendor/supplier corruption,

• the occurrence or threat of epidemic or pandemic diseases or any government response to such occurrence or threat;

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• changes in political conditions, and

• other forms of government regulation and economic conditions that are beyond our control.

See "Item 1A. Risk Factors - Our non-U.S. operations involve additional risks not associated with U.S. operations."

Executive Officers

Officers generally serve for a one-year term or until successors are elected and qualified to serve. The table below sets forth certain information regarding our principal officers, including our executive officers:

Name	Age	Position
Carl G. Trowell	46	Chief Executive Officer and President
J. Mark Burns	58	Executive Vice President - Chief Operating Officer
James W. Swent III	64	Executive Vice President and Chief Financial Officer (principal financial officer)
P. Carey Lowe	56	Executive Vice President
Steven J. Brady	55	Senior Vice President - Eastern Hemisphere
John S. Knowlton	55	Senior Vice President - Technical
Gilles Luca	43	Senior Vice President - Western Hemisphere
David E. Hensel	48	Senior Vice President - Marketing
Brady K. Long	42	Vice President - General Counsel and Secretary
Robert W. Edwards, III	37	Controller (principal accounting officer)

Set forth below is certain additional information on our executive officers, including the business experience of each executive officer for at least the last five years:

Carl G. Trowell joined Ensco in June 2014 as Chief Executive Officer and President and was appointed to Ensco’s Board of Directors. He succeeds Dan Rabun who retired in June 2014 after eight years as Chief Executive Officer. Prior to joining Ensco, Mr. Trowell served in various leadership positions at Schlumberger, including positions as President – Integrated Project Management (IPM), President – Schlumberger Production Management (SPM) and President – Schlumberger WesternGeco Ltd. Mr. Trowell began his professional career as a petroleum engineer with Shell before joining Schlumberger where he held a variety of international management positions. Mr. Trowell has a PhD in Earth Sciences from the University of Cambridge, a Bachelor of Science degree in Geology from Imperial College London and a MBA from The Open University.

J. Mark Burns joined Ensco in 2008 and was appointed to his current position of Executive Vice President and Chief Operating Officer in September 2012. Prior to his current position, Mr. Burns served Ensco as Senior Vice President—Western Hemisphere, Senior Vice President and as President of ENSCO Offshore International Company, a subsidiary of Ensco. Prior to joining Ensco, Mr. Burns served in various international capacities with Noble Corporation (a leading offshore drilling contractor), including his most recent position as Vice President & Division Manager responsible for offshore units located in the Gulf of Mexico. In 2007, Mr. Burns was named IADC Drilling Contractor of the Year. Mr. Burns holds a Bachelor of Arts Degree in Business and Political Science from Sam Houston State University.

James W. Swent III joined Ensco in 2003 and was appointed to his current position of Executive Vice President – Chief Financial Officer in July 2012. Prior to his current position, Mr. Swent served as Senior Vice President – Chief Financial Officer. Prior to joining Ensco, Mr. Swent served as Co-Founder and Managing Director of Amrita Holdings, LLC since 2001.  Mr. Swent previously held various financial executive positions in the information technology, telecommunications and manufacturing industries, including positions with Memorex Corporation and Nortel Networks.  He served as Chief Financial Officer and Chief Executive Officer of Cyrix Corporation from 1996 to 1997 and Chief Financial Officer and Chief Executive Officer of American Pad and Paper Company from 1998 to 2000. 

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Mr. Swent holds a Bachelor of Science Degree in Finance and a Master Degree in Business Administration from the University of California at Berkeley.

P. Carey Lowe joined Ensco in 2008 and was appointed to his current position of Executive Vice President in December 2014. Prior to his current position, Mr. Lowe served Ensco as Senior Vice President - Eastern Hemisphere and Senior Vice President with responsibilities including the Deepwater Business Unit, safety, health and environmental matters, capital projects, engineering and strategic planning.  Prior to joining Ensco, Mr. Lowe served as Vice President – Latin America for Occidental Oil & Gas. He also served as President & General Manager, Occidental Petroleum of Qatar Ltd. from 2001 to 2007. Mr. Lowe held various drilling-related management positions with Sedco Forex and Schlumberger Oilfield Services from 1980 to 2000, including Business Manager – Drilling, North and South America and General Manager – Oilfield Services, Saudi Arabia, Bahrain and Kuwait. Following Schlumberger, he was associated with a business-to-business e-procurement company until he joined Occidental during 2001. Mr. Lowe holds a Bachelor of Science Degree in Civil Engineering from Tulane University.

Steven J. Brady joined Ensco in 2002 and was appointed to his current position of Senior Vice President – Eastern Hemisphere in December 2014. Prior to his current position, Mr. Brady served as Senior Vice President - Western Hemisphere, Vice President – Europe and Mediterranean, General Manager – Middle East and Asia Pacific, and in other leadership positions in the Eastern Hemisphere. Prior to joining Ensco, Mr. Brady spent 18 years in various technical and managerial roles for ConocoPhillips in locations around the world. Mr. Brady holds a Bachelor of Science Degree in Petroleum Engineering from Mississippi State University.

John S. Knowlton joined Ensco in 1998 and was appointed to his current position of Senior Vice President – Technical in May 2011. Prior to his current position, Mr. Knowlton served Ensco as Vice President – Engineering & Capital Projects, General Manager – North & South America, Operations Manager – Asia Pacific Rim, and Operations Manager overseeing the construction and operation of our first ultra-deepwater semisubmersible rig, ENSCO 7500. Before joining Ensco, Mr. Knowlton served in various domestic and international capacities with Ocean Drilling & Exploration Company and Diamond Offshore Drilling, Inc. Mr. Knowlton holds a Bachelor of Science Degree in Civil Engineering from Tulane University.

Gilles Luca joined Ensco in 1997 and was appointed to his current position of Senior Vice President - Western Hemisphere in December 2014. Prior to his current position, Mr. Luca was Vice President - Business Development and Strategic Planning, Vice President - Brazil Business Unit and General Manager - Europe and Africa. Before joining Ensco as an Operations Engineer in The Netherlands, Mr. Luca was employed by Foramer Drilling and Schlumberger with assignments in France and Venezuela. He holds a Master Degree in Petroleum Engineering from the French Petroleum Institute and a Bachelor in Civil Engineering.

David E. Hensel joined Ensco in 2003 and was appointed to his current position as Senior Vice President - Marketing in January 2014. Prior to his current position, he served as Vice President – North and South America (excluding Brazil), General Manager - Administration and Marketing of the Deepwater Business Unit, General Manager - Europe and Africa Business Unit and Director - Marketing. Before joining the Company, Mr. Hensel served in various senior management positions with Helmerich & Payne International Drilling and Nabors Industries. Mr. Hensel holds a Master of Business Administration degree in Finance from Rice University and a Bachelor Degree in Materials and Logistic Management from Michigan State University.

Brady K. Long joined Ensco in 2011 as Vice President - General Counsel and Secretary in connection with the Pride acquisition. Prior to joining Ensco, Mr. Long served as Vice President – General Counsel and Secretary with Pride from 2009 to 2011. He joined Pride in 2005 as Assistant General Counsel and served as Chief Compliance Officer from 2006 to 2009. Mr. Long previously practiced corporate and securities law for BJ Services Company and with the law firm of Bracewell & Giuliani LLP. He holds a Bachelor of Arts Degree from Brigham Young University and a Juris Doctorate Degree from The University of Texas School of Law.

Robert W. Edwards, III joined Ensco in 2007 and was appointed to his current position of Controller in November 2012. Prior to his current position, he served as Director – Corporate Accounting, Director of Finance and

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Administration – Deepwater Business Unit and Manager- Accounting Public Reporting. From 2001 to 2007, Mr. Edwards served in various capacities as an employee in the audit practice at Deloitte & Touche LLP. Mr. Edwards holds a Bachelor of Science Degree in Business Administration and a Master Degree in Accounting from Trinity University.

Employees

We employed approximately 8,500 personnel worldwide as of February 23, 2015.  The majority of our personnel work on rig crews and are compensated on an hourly basis.

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Available Information

Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to these reports that we file or furnish to the SEC in accordance with the Securities Exchange Act of 1934, as amended, are available on our website at www.enscoplc.com. These reports also are available in print without charge by contacting our Investor Relations Department at 713-430-4607 as soon as reasonably practicable after we electronically file the information with, or furnish it to, the SEC.  The information contained on our website is not included as part of, or incorporated by reference into, this report.

Item 1A.Risk Factors

Risks Related to Our Business

There are numerous factors that affect our business and operating results, many of which are beyond our control. The following is a description of significant factors that might cause our future operating results to differ materially from those currently expected. The risks described below are not the only risks facing our Company. Additional risks and uncertainties not specified herein, not currently known to us or currently deemed to be immaterial also may materially adversely affect our business, financial position, operating results and/or cash flows.

The success of our business largely depends on the level of activity in the oil and gas industry, which can be significantly affected by volatile oil and natural gas prices.

Brent crude oil prices have fallen during the last five months, from $95 per barrel to $60 per barrel on February 23, 2015. Operators have announced significant declines in capital spending in their 2015 budgets, including the cancellation or deferral of existing programs. These declines in capital spending levels, coupled with additional newbuild supply, have put significant pressure on day rates and utilization. The success of our business largely depends on the level of activity in offshore oil and natural gas exploration, development and production. Oil and natural gas prices, and market expectations of potential changes in these prices, may continue to significantly affect the level of drilling activity. The decline, or the perceived risk of a further decline, in oil and/or natural gas prices could cause oil and gas companies to further reduce their overall level of activity or spending, in which case demand for our services may further decline and revenues may continue to be adversely affected through lower rig utilization and/or lower day rates.  Numerous factors may affect oil and natural gas prices and the level of demand for our services, including:

• oil and natural gas supply and demand,

• expectations regarding future energy prices, 

• the ability of the Organization of Petroleum Exporting Countries ("OPEC") to set and maintain production levels and pricing, 

• capital allocation decisions by our customers, including the relative economics of offshore development versus onshore prospects,

• the level of production by non-OPEC countries, 

• U.S. and non-U.S. tax policy, 

• laws and government regulations that limit, restrict or prohibit exploration and development of oil and natural gas in various jurisdictions, or materially increase the cost of such exploration and development,

• advances in exploration and development technology,

• disruption to exploration and development activities due to hurricanes and other severe weather conditions and the risk thereof, 

• the cost of exploring for, developing, producing and delivering oil and natural gas,

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• rate of discovery of new reserves,

• local and international political, economic and weather conditions,

• the development and exploitation of alternative fuels,

• the worldwide military or political environment, including uncertainty or instability resulting from an escalation or additional outbreak of armed hostilities or other crises in oil or natural gas producing areas of the Middle East or geographic areas in which we operate, or acts of terrorism, and 

• global economic conditions. 

Any prolonged reduction in oil and natural gas prices will depress the levels of exploration, development and production activity. In addition, continued hostilities in foreign countries and the occurrence or threat of terrorist attacks against the United States or other countries could create downward pressure on the economies of the United States and other countries. Moreover, even during periods of high commodity prices, customers may cancel or curtail their drilling programs, or reduce their levels of capital expenditures for exploration and production for a variety of reasons, including their lack of success in exploration efforts. Advances in onshore exploration and development technologies, particularly with respect to onshore shale plays, could result in our customers allocating more of their capital expenditure budgets to onshore exploration and production activities and less to offshore activities. These factors could cause our revenues and margins to decline, as a result of declines in utilization and day rates, and limit our future growth prospects. Any significant decrease in day rates or utilization of our rigs, particularly our high-specification floaters, could materially reduce our revenues and profitability. In addition, these risks could increase instability in the financial and insurance markets and make it more difficult for us to access capital and to obtain insurance coverage that we consider adequate or are otherwise required by our contracts.

Deterioration of the global economy and/or a continued decline in oil and natural gas prices could cause our customers to reduce spending on exploration and development drilling. These conditions also could cause our customers and/or vendors to fail to fulfill their commitments and/or fund their future operations and obligations, which could have a material adverse effect on our business.

The success of our business largely depends on the level of activity in offshore oil and natural gas exploration and development drilling worldwide. Oil and natural gas prices, and market expectations of potential changes in these prices, significantly impact the level of worldwide drilling activity.

A continued decline in oil and natural gas prices, whether caused by OPEC, economic conditions, international or national climate change and/or environmental regulations or other factors, could cause oil and gas companies to reduce their overall level of drilling activity and spending. Disruption in the capital markets could also cause oil and gas companies to reduce their overall level of drilling activity and spending. These conditions could cause our customers and vendors to fail to fulfill their commitments to us.

Historically, when drilling activity and spending decline, utilization and day rates also decline and drilling may be reduced or discontinued, resulting in an oversupply of drilling rigs. The oversupply of drilling rigs will be exacerbated by the entry of newbuild rigs into the market. When idled or stacked, drilling rigs do not earn revenues, but continue to require cash expenditures for crews, fuel, insurance, berthing and associated items.

A further decline in oil and natural gas prices, together with a deterioration of the global economy, could substantially reduce demand for drilling rigs and result in a material adverse effect on our financial position, operating results or cash flows.

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The offshore contract drilling industry historically has been highly competitive and cyclical, with periods of low demand and excess rig availability that could result in adverse effects on our business.

Our industry is highly competitive, and our contracts are traditionally awarded on a competitive bid basis. Pricing, safety records and competency are key factors in determining which qualified contractor is awarded a job. Rig availability, location and technical capabilities also can be significant factors in the determination. In addition, consolidations within the oil and gas industry have reduced the number of available customers, resulting in increased competition for projects. If we are not able to compete successfully, our revenues and profitability may be reduced.

Financial operating results in the offshore contract drilling industry historically have been very cyclical and are primarily related to the demand for drilling rigs and the available supply of drilling rigs.  Demand for rigs is directly related to the regional and worldwide levels of offshore exploration and development spending by oil and gas companies, which is beyond our control. Offshore exploration and development spending may fluctuate substantially from year-to-year and from region-to-region.

The supply of offshore drilling rigs has increased in recent years. There are 200 newbuild drillships, semisubmersibles and jackup rigs reported to be on order or under construction with delivery expected by the end of 2020.  Approximately 90 of these rigs are scheduled for delivery during 2015, representing an approximate 11% increase in the total worldwide fleet of offshore drilling rigs. There are no assurances that the market in general or a geographic region in particular will be able to fully absorb the supply of new rigs in future periods.

The increase in supply of offshore drilling rigs during 2014 and early 2015 resulted in an oversupply of offshore drilling rigs and a decline in utilization and/or day rates, a situation which, if it persists for the next few years, could be exacerbated by a prolonged decline in demand for drilling rigs. Lower utilization and/or day rates in one or more of the regions in which we operate could adversely affect our revenues and profitability.

Certain events, such as limited availability or non-availability of insurance for certain perils in some geographic areas, rig loss or damage due to hurricanes, blowouts, craterings, punchthroughs and other operational events, may also impact the supply of rigs in a particular market and cause rapid fluctuations in utilization and day rates.

Future periods of reduced demand and/or excess rig supply may require us to idle additional rigs or enter into lower day rate contracts or contracts with less favorable terms. There can be no assurance that the current demand for drilling rigs will not decline in future periods. A decline in demand for drilling rigs or an oversupply of drilling rigs could adversely affect our financial position, operating results and cash flows.

Our business will be adversely affected if we are unable to secure contracts on economically favorable terms.

Our ability to renew expiring contracts or obtain new contracts and the terms of any such contracts will depend on market conditions. We may be unable to renew our expiring contracts or obtain new contracts for the rigs under contracts that have expired or been terminated, and the day rates under any new contracts may be substantially below the existing day rates, which could adversely affect our revenues and profitability.

Our customers may be unable or unwilling to fulfill their contractual commitments to us, including their obligations to pay for losses, damages or other liabilities resulting from operations under the contract.

Certain of our customers are subject to liquidity risk and such risk could lead them to seek to repudiate, cancel or renegotiate our drilling contracts for various reasons. Our drilling contracts provide for varying levels of indemnification from our customers, including with respect to well control and subsurface risks. Our drilling contracts also 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 from the drilling operations we perform. Under our drilling contracts, liability with respect to personnel and property customarily is generally allocated so that we and our customers each assume liability for our respective personnel and property. Our customers typically assume most of the responsibility for and indemnify us from any loss, damage or other liability resulting from pollution or contamination, including clean-up and removal, third-party damages, and fines and penalties arising from operations

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under the contract when the source of the pollution originates from the well or reservoir, including those resulting from blow-outs or cratering of the well. Notwithstanding a contractual indemnity from a customer, there can be no assurance that our customers will be financially able to assume their responsibility, or honor their indemnity to us, for such losses. In addition, under the laws of certain jurisdictions, such indemnities are not enforceable if the cause of the damage was our gross negligence or willful misconduct. This could result in our having to assume liabilities not otherwise contemplated in our contracts due to customer balance sheet or liquidity issues.

We may suffer losses if our customers terminate or seek to renegotiate our contracts, if operations are suspended or interrupted or if a rig becomes a total loss.

Our drilling contracts often are subject to termination without cause upon notice by the customer. Although contracts may require the customer to pay an early termination payment in the event of a termination for convenience (without cause), such payment may not fully compensate for the loss of the contract, and some of our contracts permit termination by the customer without an early termination payment. In periods of rapid market downturn similar to the current environment, our customers may not be able to honor the terms of existing contracts (including contracts for new rigs under construction), may terminate contracts even where there may be onerous termination fees, or may seek to renegotiate contract day rates and terms in light of depressed market conditions.

Drilling contracts customarily specify automatic termination or termination at the option of the customer in the event of a total loss of the drilling rig and often include provisions addressing termination rights or reduction or cessation of day rates if operations are suspended or interrupted for extended periods due to breakdown of major rig equipment, unsatisfactory performance, "force majeure" events beyond the control of either party or other specified conditions.

If a customer cancels a contract or if we elect to terminate a contract due to the customer’s nonperformance and, in either case, we are unable to secure a new contract on a timely basis and on substantially similar terms, or if a contract is disputed or suspended for an extended period of time or renegotiated, it could materially and adversely affect our financial condition, results of operations and cash flows.

The loss of a significant customer could adversely affect us.

We provide our services to major international, government-owned and independent oil and gas companies.  During 2014, our five largest customers accounted for 49% of our consolidated revenues in the aggregate, with our largest customer representing 16% of our consolidated revenues.  Our financial position, operating results and cash flows may be materially adversely affected if a major customer terminates its contracts with us, fails to renew its existing contracts with us, requires renegotiation of our contracts or declines to award new contracts to us.

Our current backlog of contract drilling revenue may not be fully realized, which may have a material adverse effect on our financial position, results of operations or cash flows.

As of December 31, 2014, our contract backlog was approximately $9.7 billion. This amount reflects the remaining contractual terms multiplied by the applicable contractual day rate. The contractual revenue may be higher than the actual revenue we receive because of a number of factors, including rig downtime or suspension of operations. Several factors could cause rig downtime or a suspension of operations, many of which are beyond our control, including:

• breakdowns of equipment;

• work stoppages, including labor strikes;

• shortages of material and skilled labor;

• surveys by government and maritime authorities;

• periodic classification surveys;

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• severe weather, strong ocean currents or harsh operating conditions;

• the occurrence or threat of epidemic or pandemic diseases or any government response to such occurrence or threat;

• the early termination of contracts; and

• force majeure events.

Liquidity issues could lead our customers to go into bankruptcy or could encourage our customers to seek to repudiate, cancel or renegotiate our drilling contracts for various reasons. Some of our drilling contracts permit early termination of the contract by the customer for convenience (without cause), generally exercisable upon advance notice to us and in some cases without making an early termination payment to us. There can be no assurances that our customers will be able to or willing to fulfill their contractual commitments to us.

The recent decline in oil prices, the perceived risk of a further decline in oil prices, and the resulting downward pressure on utilization is causing some customers to consider early termination of select contracts despite having to pay onerous early termination fees in some cases. We are currently in discussions with some of our customers regarding these issues. Customers may request to re-negotiate the terms of existing contracts, or they may request early termination in some circumstances. Therefore, revenues recorded in future periods could differ materially from our current backlog. Our inability to realize the full amount of our contract backlog may have a material adverse effect on our financial position, results of operations or cash flows.

We may have difficulty obtaining or maintaining insurance in the future on terms we find acceptable and our insurance coverage may not protect us against all of the risks and hazards we face, including those specific to offshore operations.

Our operations are subject to hazards inherent in the offshore drilling industry, such as blow-outs, reservoir damage, loss of production, loss of well control, uncontrolled formation pressures, lost or stuck drill strings, equipment failures and mechanical breakdowns, punchthroughs, 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.

We generally identify the operational hazards for which we will procure insurance coverage based on the likelihood of loss, the potential magnitude of loss, the cost of coverage, the requirements of our customer contracts and applicable legal requirements. Although we maintain what we believe to be an appropriate level of insurance covering hazards and risks we currently encounter during our operations, no assurance can be given that we will be able to obtain insurance against all potential risks and hazards.

Furthermore, our insurance carriers may interpret our insurance policies such that they do not cover losses for which we make claims. Our insurance policies may also have exclusions of coverage for some losses. Uninsured exposures may include radiation hazards, certain loss or damage to property onboard our rigs and losses relating to shore-based terrorist acts or strikes.

If we are unable to obtain or maintain adequate insurance at rates and with deductibles or retention amounts that we consider commercially reasonable, we may choose to forgo insurance coverage and retain the associated risk of loss or damage.

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If a significant accident or other event occurs and is not fully covered by insurance or contractual indemnity, it could adversely affect our financial position, results of operations or cash flows.

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 eight jackup rigs and nine floaters 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 for 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 losses 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 any 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.

We decided not to purchase windstorm insurance for hull and machinery losses to our floaters arising from windstorm damage in the U.S. Gulf of Mexico upon renewal of our annual insurance policies effective May 31, 2014, due to the significant premium, high deductible and limited coverage for windstorm damage. We opted out of windstorm insurance for our jackups in the U.S. Gulf of Mexico during 2009 and have not since renewed that insurance. We believe it is no longer customary for drilling contractors with similar size and fleet composition to purchase windstorm insurance for rigs in the U.S. Gulf of Mexico, for the aforementioned reasons. Accordingly, we have retained the risk of loss or damage for our eight jackup rigs and our nine floaters arising from windstorm damage in the U.S. Gulf of Mexico.

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 annual insurance policies are up for renewal effective May 31, 2015, and any retained exposures for property loss or damage and wreckage and debris removal or other liabilities associated with U.S. Gulf of Mexico tropical storms or hurricanes could have a material adverse effect on our financial position, operating results and cash

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flows if we sustain significant uninsured or underinsured losses or liabilities as a result of U.S. Gulf of Mexico tropical storms or hurricanes.

We may incur asset impairments as a result of future declines in demand for offshore drilling rigs.

During the year ended December 31, 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2,463.1 million, of which $1,220.8 million was included in (loss) income from continuing operations and $1,242.3 million was included in (loss) income from discontinued operations, net in our consolidated statement of operations. See "Note 3 - Property and Equipment" to our consolidated financial statements for additional information on our property and equipment.  As of December 31, 2014, the carrying value of our property and equipment totaled $12.5 billion, which represented 78% of our total assets.

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. 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 are frequently contracted at or near cash break-even rates for extended periods of time until day rates increase when the supply/demand balance is restored. However, if the global economy were to deteriorate and/or the offshore drilling industry were to incur a significant prolonged downturn, additional impairment charges may occur with respect to specific individual rigs, groups of rigs, such as a specific type of drilling rig, or rigs in a certain geographic location.

During the year ended December 31, 2014, we recorded a $3.0 billion non-cash loss on impairment of our Floaters reporting unit goodwill. See "Note 8 - Goodwill and Other Intangible Assets and Liabilities" to our consolidated financial statements for additional information on our goodwill. As of December 31, 2014, the carrying value of our goodwill totaled $276.1 million, which represented 2% of total assets.

We test goodwill for impairment on an annual basis or when events or changes in circumstances indicate that a potential impairment exists. The goodwill impairment test requires us to identify reporting units, perform a qualitative assessment of the likelihood that a reporting unit’s carrying value exceeds its estimated fair value, and in certain circumstances estimate each reporting unit's fair value as of the testing date. In most instances, our calculation of the fair value of our reporting units is 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. If the aggregate fair value of our reporting units exceeds our market capitalization, we evaluate the reasonableness of the implied control premium. If we determine the implied control premium is not reasonable, we adjust the discount rate or other assumptions used in our discounted cash flow model and reduce the estimated fair values of our reporting units.

If the global economy deteriorates and/or our expectations relative to future offshore drilling industry conditions decline, our expectations of future cash flows may decline and could ultimately result in additional goodwill impairment. Additionally, a significant decline in the market value of our shares could result in additional goodwill impairment.

Our non-U.S. operations involve additional risks not associated with U.S. operations.

Revenues from non-U.S. operations were 62%, 61% and 65% of our total revenues during 2014, 2013 and 2012, respectively. Our non-U.S. operations and shipyard rig construction and enhancement projects are subject to political, economic and other uncertainties, including:

• terrorist acts, war and civil disturbances, 

• expropriation, nationalization, deprivation or confiscation of our equipment, 

• expropriation or nationalization of a customer's property or drilling rights, 

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• repudiation or nationalization of contracts, 

• assaults on property or personnel, 

• piracy, kidnapping and extortion demands, 

• significant governmental influence over many aspects of local economies,

• unexpected changes in law and regulatory requirements, including changes in interpretation or enforcement of existing laws,

• work stoppages, often due to strikes over which we have little or no control,

• complications associated with repairing and replacing equipment in remote locations,

• limitations on insurance coverage, such as war risk coverage, in certain areas,

• imposition of trade barriers,

• wage and price controls,

• import-export quotas,

• exchange restrictions, 

• currency fluctuations, 

• changes in monetary policies,

• uncertainty or instability resulting from hostilities or other crises in the Middle East, West Africa, Latin America or other geographic areas in which we operate,

• changes in the manner or rate of taxation, 

• limitations on our ability to recover amounts due, 

• increased risk of government and vendor/supplier corruption, 

• increased local content requirements,

• the occurrence or threat of epidemic or pandemic diseases or any government response to such occurrence or threat;

• changes in political conditions, and 

• other forms of government regulation and economic conditions that are beyond our control.

We historically have maintained insurance coverage and obtained contractual indemnities that protect us from some, but not all, of the risks associated with our non-U.S. operations such as nationalization, deprivation, confiscation, political and war risks. However, there can be no assurance that any particular type of contractual or insurance protection will be available in the future or that we will be able to purchase our desired level of insurance coverage at commercially feasible rates.  Moreover, we may initiate a self-insurance program through one or more captive insurance subsidiaries.  In circumstances where we have insurance protection for some or all of the risks associated with non-U.S. operations, such insurance may be subject to cancellation on short notice, and it is unlikely that we would be able to remove our rig or rigs from the affected area within the notice period. Accordingly, a significant event for which we are uninsured, underinsured or self-insured, or for which we have not received an enforceable contractual indemnity from a customer, could cause a material adverse effect on our financial position, operating results and cash flows.

We are subject to various tax laws and regulations in substantially all countries in which we operate or have a legal presence. We evaluate applicable tax laws and employ various business structures and operating strategies to

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obtain the optimal level of taxation on our revenues, income, assets and personnel. Actions by tax authorities that impact our business structures and operating strategies, such as changes to tax treaties, laws and regulations, or the interpretation or repeal of any of the foregoing, changes in the administrative practices and precedents of tax authorities, adverse rulings in connection with audits or otherwise, or other challenges may substantially increase our tax expense.

As required by law, we file periodic tax returns that are subject to review and examination by various revenue agencies within the jurisdictions in which we operate. We cannot predict or provide assurance as to the ultimate outcome of existing or future tax assessments.

Our non-U.S. operations also face the risk of fluctuating currency values, which may impact our revenues, operating costs and capital expenditures. We currently conduct contract drilling operations in certain countries that have experienced substantial fluctuations in the value of their currency compared to the U.S. dollar. In addition, some of the countries in which we operate have occasionally enacted exchange controls. Generally, we have contractually mitigated these risks by invoicing and receiving payment in U.S. dollars (our functional currency) or freely convertible currency and, to the extent possible, by limiting our acceptance of foreign currency to amounts which approximate our expenditure requirements in such currencies. However, not all of our contracts contain these terms and there is no assurance that our contracts will contain such terms in the future.

A portion of the costs and expenditures incurred by our non-U.S. operations, including a portion of the construction payments for new rigs, are settled in local currencies, exposing us to risks associated with fluctuation in the value of these currencies relative to the U.S. dollar. We use foreign currency forward contracts to reduce this exposure in certain cases.. However, a relative weakening in the value of the U.S. dollar in relation to the local currencies in these countries may increase our costs and expenditures.

Our non-U.S. operations are also subject to various laws and regulations in countries in which we operate, including laws and regulations relating to the operation of drilling rigs and the requirements for equipment. We may be required to make significant capital expenditures to operate in such countries, which may not be reimbursed by our customers. Governments in some non-U.S. countries have become increasingly active in regulating and controlling the ownership of oil, natural gas and mineral concessions and companies holding concessions, the exploration of oil and natural gas and other aspects of the oil and gas industry in their countries. In addition, government action, including initiatives by OPEC, may continue to cause oil and/or natural gas price volatility. In some areas of the world, government activity has adversely affected the amount of exploration and development work performed by major international oil companies and may continue to do so. Moreover, certain countries accord preferential treatment to local contractors or joint ventures or impose specific quotas for local goods and services, which can increase our operational costs and place us at a competitive disadvantage. There can be no assurance that such laws and regulations or activities will not have a material adverse effect on our future operations.

The shipment of goods, services and technology across international borders subjects us to extensive trade laws and regulations. Our import activities are governed by specific customs laws and regulations in each of the countries where we operate. Moreover, many countries, including the United States, control the export and re-export of certain goods, services and technology and impose related export recordkeeping and reporting obligations. Governments also may impose express or de facto economic sanctions against certain countries, persons and other entities that may restrict or prohibit transactions involving such countries, persons and entities.

The laws and regulations concerning import activity, export recordkeeping and reporting, export control and economic sanctions are complex and constantly changing. These laws and regulations may be enacted, amended, enforced or interpreted in a manner materially impacting our operations. Shipments can be delayed and denied export or entry for a variety of reasons, some of which are outside our control and some of which may result from failure to comply with existing legal and regulatory regimes. Shipping delays or denials could cause unscheduled operational downtime. Any failure to comply with applicable legal and regulatory trading obligations also could result in criminal and civil penalties and sanctions, such as fines, imprisonment, exclusion from government contracts, seizure of shipments and loss of import and export privileges.

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Our employees, contractors and agents may take actions in violation of our policies and procedures designed to promote compliance with the laws of the jurisdictions in which we operate. Any such violation, even if prohibited by our policies, could have a material adverse effect on our financial position, operating results or cash flows.

Rig construction, upgrade and enhancement projects are subject to risks, including delays and cost overruns, which could have a material adverse effect on our operating results. The risks are concentrated because our three ultra-deepwater drillships currently under construction are at a single shipyard in South Korea and our four jackup rigs currently under construction are at two shipyards in Dubai and Singapore.

There are 200 new offshore drilling rigs reported to be on order or under construction with expected delivery dates through 2020.  As a result, shipyards and third-party equipment vendors are under significant resource constraints to meet delivery obligations. Such constraints may lead to substantial delivery and commissioning delays and/or equipment failures and/or quality deficiencies. Furthermore, new drilling rigs may face start-up or other operational complications following completion of construction work or other unexpected difficulties including equipment failures, design or engineering problems that could result in significant downtime at reduced or zero day rates or the cancellation or termination of drilling contracts.

We currently have three ultra-deepwater drillships and four jackup rigs under construction. In addition, we may construct additional rigs and continue to upgrade the capability and extend the service lives of our existing rigs. Some of these expenditures are unplanned.

Rig construction, upgrade, life extension and repair projects are subject to the risks of delay or cost overruns inherent in any large construction project, including the following:

• failure of third-party equipment to meet quality and/or performance standards, 

• delays in equipment deliveries or shipyard construction, 

• shortages of materials or skilled labor, 

• damage to shipyard facilities or construction work in progress, including damage resulting from fire, explosion, flooding, severe weather, terrorism, war or other armed hostilities, 

• unforeseen design or engineering problems, including those relating to the commissioning of newly designed equipment, 

• unanticipated actual or purported change orders, 

• strikes, labor disputes or work stoppages, 

• financial or operating difficulties of equipment vendors or the shipyard while constructing, enhancing, upgrading, improving or repairing a rig or rigs, 

• unanticipated cost increases, 

• foreign currency exchange rate fluctuations impacting overall cost, 

• inability to obtain the requisite permits or approvals, 

• client acceptance delays,

• disputes with shipyards and suppliers,

• latent damages or deterioration to hull, equipment and machinery in excess of engineering estimates and assumptions,

• claims of force majeure events, and 

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• additional risks inherent to shipyard projects in a non-U.S. location.

Our risks are concentrated because our seven rigs currently under construction are at three shipyards.

Two of our seven rigs currently under construction, ENSCO DS-8 and ENSCO DS-9, have secured drilling contracts upon completion of construction and are scheduled to be delivered during the first half of 2015. ENSCO DS-10, ENSCO 110, ENSCO 123, ENSCO 140 and ENSCO 141 are scheduled to be delivered beginning in the first half of 2015 through the second half of 2016.  There is no assurance that we will secure drilling contracts for these rigs, or future rigs we construct, or that the drilling contracts we may be able to secure will be based upon rates and terms that will provide a reasonable rate of return on these investments. Our failure to secure contractual commitments for these rigs at rates and terms that result in a reasonable return upon completion of construction may result in a material adverse effect on our financial position, operating results and cash flows. With respect to our rigs under construction, we are subject to the risk of delays and other hazards that could impact the viability of the contracts and could have a material adverse effect on our financial position, operating results and cash flows.

Our drilling contracts with national oil companies may expose us to greater risks than we normally assume in drilling contracts with non-governmental customers.

We currently own and operate 16 rigs and manage four rigs contracted with national oil companies. The terms of these contracts are often non-negotiable and may expose us to greater commercial, political and operational risks than we assume in other contracts, such as exposure to materially greater environmental liability and other claims for damages (including consequential damages) and personal injury related to our operations, or the risk that the contract may be terminated by our customer without cause on short-term notice, contractually or by governmental action, under certain conditions that may not provide us an early termination payment, collection risks and political risks. We can provide no assurance that the increased risk exposure will not have an adverse impact on our future operations or that we will not increase the number of rigs contracted to national oil companies with commensurate additional contractual risks. 

Legal and regulatory proceedings could affect us adversely.

We are involved in litigation, including various claims, disputes and regulatory proceedings that arise in the ordinary course of business, many of which are uninsured and relate to intellectual property, commercial, operational, employment, regulatory, or other activities.

We operate in a number of countries throughout the world, including countries known to have a reputation for corruption and are subject to the U.S. Foreign Corrupt Practices Act of 1977 (“FCPA”), the U.S. Treasury Department's Office of Foreign Assets Control ("OFAC") regulations, the U.K. Bribery Act ("UKBA"), other U.S. laws and regulations governing our international operations and similar laws in other countries.

In 2010, Pride and its subsidiaries resolved with the U.S. Department of Justice (“DOJ”) and the SEC their previously disclosed investigations into potential violations of the FCPA. However, Pride has received preliminary inquiries from governmental authorities of certain of the 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 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, stockholders, 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 clients and potential clients, to attract and retain employees and to access the capital markets.

Any violation of the FCPA, OFAC regulations, the UKBA or other applicable anti-corruption laws, by us, our affiliated entities or their respective officers, directors, employees and agents could result in substantial fines, sanctions,

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civil and/or criminal penalties and curtailment of operations in certain jurisdictions and could adversely affect our financial condition, results of operations, cash flows or our availability of funds under our revolving credit facility. Further, detecting, investigating, and resolving actual or alleged violations is expensive and can consume significant time and attention of our senior management.

Increasing regulatory complexity could adversely impact the costs associated with our offshore drilling operations.

Increases in regulatory requirements, particularly in the U.S. Gulf of Mexico, could significantly increase our costs.  In recent years, we have seen several significant regulatory changes that have affected the way we operate in the U.S. Gulf of Mexico.

Hurricanes Katrina and Rita in 2005 and Hurricanes Gustav and Ike in 2008 caused damage to a number of rigs in the Gulf of Mexico. Rigs that were moved off location by the storms damaged platforms, pipelines, wellheads and other drilling rigs. The U.S. Bureau of Ocean Energy Management, Regulation and Enforcement ("BOEMRE"), and one of its successor agencies, the Bureau of Safety and Environmental Enforcement ("BSEE"), have issued guidelines for jackup rig fitness requirements during hurricane seasons, which have been in effect through November 2014. As a result of these BOEMRE guidelines, jackup rigs in the U.S. Gulf of Mexico are required to operate with a higher air gap (the space between the water level and the bottom of the rig's hull) during hurricane season, effectively reducing the water depth in which they can operate. The guidelines also provide for enhanced information and data requirements from oil and gas companies operating in the U.S. Gulf of Mexico. BSEE may take other steps that could increase the cost of operations or reduce the area of operations. Implementation of BSEE guidelines and regulations may subject us to increased costs and limit the operational capabilities of our rigs.

Similarly, as a result of the Macondo well incident in the U.S. Gulf of Mexico, the U.S. Department of the Interior issued Notices to Lessees (“NTLs"), implementing new regulations applicable to drilling operations in the U.S. Gulf of Mexico. Current or future NTLs or other rules, directives and regulations may further impact our customers' ability to obtain permits and commence or continue deep or shallow water operations in the U.S. Gulf of Mexico. Future legislative or regulatory enactments may impose new requirements for well control and blowout prevention equipment that could increase our costs and cause delays in our operations due to unavailability of associated equipment.

Also as a result of the Macondo well incident, BOEMRE and BSEE have promulgated regulations regarding safety and environmental management systems ("SEMS"). In 2013, BSEE adopted a final rule modifying the SEMS requirements. Although the SEMS requirements are directed primarily at operators, they have an indirect impact on contractors, including requirements for personnel training, written safe work practices and written agreements with operators regarding the application of the operators' and contractors' safety and environmental policies at the worksite. In addition, BSEE has stated that it is considering requiring contractors to have their own SEMS programs and that it might address that possibility in future rulemaking. The current SEMS regulations and the possibility of additional SEMS rules for contractors could expose us to increased costs.

In 2012, BSEE also issued an interim policy document for use by BSEE inspectors in issuing incidents of noncompliance (“INCs”) to contractors conducting operations under BSEE jurisdiction on the Outer Continental Shelf of the U.S. Gulf of Mexico. The stated purpose of the policy is to provide for consistency in application of BSEE enforcement authority by establishing guidelines for issuance of INCs to contractors in addition to operators. The policy indicates that BSEE's enforcement actions will continue to focus primarily on lessees and operators, but makes it clear that BSEE will “in appropriate circumstances” also issue INCs to contractors for "serious violations" of BSEE regulations. Further, the industry has adopted new standards, including API Standard 53 relating to the maintenance, inspection and testing of well control equipment. The imposition of INCs on contractors exposes us to fines and penalties for violation of BSEE regulations and the new standards expose us to increased costs and loss of revenue.

New regulatory, legislative, permitting or certification requirements in the U.S., including laws and regulations that have or may impose increased financial responsibility, oil spill abatement contingency plan capability requirements, or additional operational requirements and certifications, could materially adversely affect our financial condition, operating results or cash flows.

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We anticipate that government regulation in other countries where we operate may follow the U.S. in regard to enhanced safety and environmental regulation, which could also result in governments imposing sanctions on contractors for operators not complying with regulations that impact drilling operations. Even if not a requirement in these countries, most international operating companies, and many others, are voluntarily complying with some or all of the U.S. inspections and safety and environmental guidelines when operating outside the U.S. Such additional governmental regulation and voluntary compliance by operators could increase the cost of our operations and expose us to greater liability.

Laws and governmental regulations may add to costs, limit our drilling activity or reduce demand for our drilling services.

Our operations are affected by political developments and by laws and regulations that relate directly to the oil and gas industry, including initiatives to limit greenhouse gas emissions. The offshore contract drilling industry is dependent on demand for services from the oil and gas industry. Accordingly, we will be directly affected by the approval and adoption of laws and regulations limiting or curtailing exploration and development drilling for oil and natural gas for economic, environmental, safety and other policy reasons. We may be exposed to risks related to new laws or regulations pertaining to climate change, carbon emissions or energy use that could reduce the use of oil or natural gas, thus reducing demand for hydrocarbon-based fuel and our drilling services. Governments also may pass laws or regulations encouraging or mandating the use of alternative energy sources, such as wind power and solar energy, which may reduce demand for oil and natural gas and our drilling services. Furthermore, we may be required to make significant capital expenditures or incur substantial additional costs to comply with new governmental laws and regulations. It is also possible that legislative and regulatory activity could adversely affect our operations by limiting drilling opportunities or significantly increasing our operating costs.

Geopolitical events, terrorist attacks, piracy and military action could affect the markets for our services and have a material adverse effect on our business and cost and availability of insurance.

Geopolitical events have resulted in military actions, terrorist, pirate and other armed attacks, civil unrest, political demonstrations, mass strikes and government responses. Military action by the United States or other nations could escalate, and acts of terrorism, piracy, kidnapping, extortion, acts of war, violence, civil war, or general disorder may initiate or continue. Such acts could be directed against companies such as ours. Such developments have caused instability in the world’s financial and insurance markets in the past. In addition, these developments could lead to increased volatility in prices for oil and natural gas and could affect the markets for our products and services. Insurance premiums could increase and coverage for these kinds of events may be unavailable in the future. Any or all of these effects could have a material adverse effect on our financial position, operating results or cash flows.

Failure to recruit and retain skilled personnel could adversely affect our operations and financial results.

We require skilled personnel to operate our drilling rigs and to provide technical services and support for our business. Competition for skilled and other labor has intensified as additional, more technically advanced, rigs are added to the worldwide fleet. There are 200 newbuild offshore drilling rigs reported to be on order or under construction with delivery expected by the end of 2020. These rigs will require more workers with specialized training and skills to operate. In periods of high utilization, it is more difficult and costly to recruit and retain qualified employees, especially in foreign countries that require a certain percentage of national employees. Competition for such personnel could increase our future operating expenses, with a resulting reduction in net income, or impact our ability to fully staff and operate our rigs. We may also incur additional costs to provide training for prospective employees for skilled positions on our newer rigs.

We may be required to maintain or increase existing levels of compensation to retain our skilled workforce, especially if our competitors raise their wage rates. Much of the skilled workforce is nearing retirement age, which may impact the availability of skilled personnel. We also are subject to potential legislative or regulatory action that may impact working conditions, paid time off or other conditions of employment. If such labor trends continue, they could further increase our costs or limit our ability to fully staff and operate our rigs and create the potential for more work stoppages, which may be beyond our control.

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Unionization efforts and labor regulations in certain countries in which we operate could materially increase our costs or limit our flexibility.

A large percentage of our employees in non-U.S. markets are protected by collective bargaining agreements that require periodic salary negotiations, which usually result in higher personnel expenses and other benefits. Efforts have been made from time to time to unionize other portions of our workforce. In addition, we have been subjected to strikes or work stoppages and other labor disruptions in certain countries. Additional unionization efforts, new collective bargaining agreements or work stoppages could materially increase our costs, reduce our revenues or limit our flexibility.

Certain legal obligations require us to contribute certain amounts to retirement funds or other benefit plans and restrict our ability to dismiss employees. Future regulations or court interpretations established in the countries in which we conduct our operations could increase our costs and materially adversely affect our business, financial condition, operating results or cash flows.

Compliance with or breach of environmental laws can be costly and could limit our operations.

Our operations are subject to laws and regulations controlling the discharge of materials into the environment, pollution, contamination and hazardous waste disposal or otherwise relating to the protection of the environment. Environmental laws and regulations specifically applicable to our business activities could impose significant liability on us for damages, clean-up costs, fines and penalties in the event of oil spills or similar discharges of pollutants or contaminants into the environment or improper disposal of hazardous waste generated in the course of our operations. To date, such laws and regulations have not had a material adverse effect on our operating results, and we have not experienced an accident that has exposed us to material liability arising out of or relating to discharges of pollutants into the environment.  However, the legislative, judicial and regulatory response to a well incident could substantially increase our and our customers' liabilities.  In addition to potential increased liabilities, such legislative, judicial or regulatory action could impose increased financial, insurance or other requirements that may adversely impact the entire offshore drilling industry.

The International Convention on Oil Pollution Preparedness, Response and Cooperation, Marpol 73/78, the U.K. Merchant Shipping Act 1995, the U.K. Merchant Shipping (Oil Pollution Preparedness, Response and Cooperation Convention) Regulations 1998, and other related legislation and regulations and Oil Pollution Act of 1990 ("OPA 90"), the Clean Water Act and other U.S. federal statutes applicable to us and our operations, as well as similar statutes in Texas, Louisiana, other coastal states and other non-U.S. jurisdictions, address oil spill prevention and control and significantly expand liability, fine and penalty exposure across many segments of the oil and gas industry. Such statutes and related regulations impose a variety of obligations on us related to the prevention of oil spills, disposal of waste and liability for resulting damages. For instance, OPA 90 imposes strict and, with limited exceptions, joint and several liability upon each responsible party for oil removal costs as well as a variety of fines, penalties and damages. Although the OPA 90 provides for certain limits of liability, such limits are not applicable where there is any safety violation or where gross negligence is involved. Failure to comply with these statutes and regulations, including OPA 90, may subject us to civil or criminal enforcement action, which may not be covered by contractual indemnification or insurance and could have a material adverse effect on our financial position, operating results and cash flows. Further, remedies under the Clean Water Act and related legislation and the OPA 90 do not preclude claims under state regulations or civil claims for damages to third parties under state laws.

Events in recent years, including the Macondo well incident, have heightened governmental and environmental concerns about the oil and gas industry. From time to time, legislative proposals have been introduced that would materially limit or prohibit offshore drilling in certain areas. We are adversely affected by restrictions on drilling in certain areas of the U.S. Gulf of Mexico and elsewhere, including the adoption of associated new safety requirements and policies regarding the approval of drilling permits, restrictions on development and production activities in the U.S. Gulf of Mexico and associated rules, directives and regulations that have and may further impact our operations. If new laws are enacted or other government action is taken that restrict or prohibit offshore drilling in our principal

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areas of operation or impose environmental protection requirements that materially increase the liabilities, financial requirements or operating or equipment costs associated with offshore drilling, exploration, development or production of oil and natural gas, our financial position, operating results and cash flows could be materially adversely affected.

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

As of December 31, 2014, we had $5.9 billion in total debt outstanding, representing approximately 42% of our total capitalization. Our current indebtedness may have several important effects on our future operations, including:

• a portion of our cash flows from operations will be dedicated to the payment of principal and interest;

• covenants contained in our debt arrangements require us to meet certain financial tests, which may affect our flexibility in planning for, and reacting to, changes in our business and may limit our ability to dispose of assets or place restrictions on the use of proceeds from such dispositions, withstand current or future economic or industry downturns and compete with others in our industry for strategic opportunities; and

• our ability to obtain additional financing to fund working capital requirements, capital expenditures, acquisitions, dividend payments and general corporate or other cash requirements may be limited.

Our ability to maintain a sufficient level of liquidity to meet our financial obligations will be dependent upon our future performance, which will be subject to general economic conditions, industry cycles and financial, business and other factors affecting our operations, many of which are beyond our control. Our future cash flows may be insufficient to meet all of our working capital requirements, debt obligations and contractual commitments, and any insufficiency could negatively impact our business.

To the extent we are unable to repay our indebtedness as it becomes due or at maturity with cash on hand or from other sources, we will need to refinance our debt, sell assets or repay the debt with the proceeds from equity offerings. Additional indebtedness or equity financing may not be available to us in the future for the refinancing or repayment of existing indebtedness, or if available, such additional indebtedness or equity financing may not be available on a timely basis, or on terms acceptable to us and within the limitations specified in our then existing debt instruments. In addition, in the event we decide to sell additional assets, we can provide no assurance as to the timing of any asset sales or the proceeds that could be realized by us from any such asset sale.

In addition, our access to credit and capital markets depends on the credit ratings assigned to our debt by independent credit rating agencies. A decrease in our credit ratings would increase our borrowing costs and adversely affect our ability to raise capital.  In addition, we may not be able to obtain favorable credit terms from our suppliers or they may require us to provide collateral, letters of credit, or other forms of security, which would increase our operating costs. As a result, a downgrade in our credit ratings, particularly below investment grade, could have a material adverse impact on our financial position, results of operations, and liquidity.

We have historically made substantial capital expenditures to maintain our fleet, and we may be required to make significant capital expenditures to maintain our competitiveness, to comply with laws and the applicable regulations and standards of governmental authorities and organizations, or to expand our fleet, each of which could adversely affect our financial condition, result of operations and cash flows.

We have historically made substantial capital expenditures to maintain our fleet. These expenditures could increase as a result of changes in:

• offshore drilling technology;

• the cost of labor and materials;

• customer requirements;

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• fleet size;

• the cost of replacement parts for existing drilling rigs;

• the geographic location of the drilling rigs;

• length of drilling contracts;

• governmental regulations and maritime self-regulatory organization and technical standards relating to safety, security or the environment; and

• industry standards.

Changes in offshore drilling technology, customer requirements for new or upgraded equipment and competition within our industry may require us to make significant capital expenditures in order to maintain our competitiveness. In addition, changes in governmental regulations, relating to safety or equipment standards, as well as compliance with standards imposed by maritime self-regulatory organizations, may require us to make additional unforeseen capital expenditures. As a result, we may be required to take our rigs out of service for extended periods of time, with corresponding losses of revenues, in order to make such alterations or to add such equipment. In the future, market conditions may not justify these expenditures or enable us to operate our older rigs profitably during the remainder of their economic lives.

Additionally, in order to expand our fleet, we may require additional capital in the future. If we are unable to fund capital with cash flows from operations or sales of non-core assets, we may be required to either incur additional borrowings or raise capital through the sale of debt or equity securities. Our ability to access the capital markets may be limited by our financial condition at the time, by changes in laws and regulations (or interpretation thereof) and by adverse market conditions resulting from, among other things, general economic conditions and contingencies and uncertainties that are beyond our control. If we raise funds by issuing equity securities, existing shareholders may experience dilution. Our failure to obtain the funds for necessary future capital expenditures could have a material adverse effect on our business and on our financial condition, results of operations and cash flows.

Significant part or equipment shortages, supplier capacity constraints, supplier production disruptions, supplier

quality and sourcing issues or price increases could increase our operating costs, decrease our revenues and adversely impact our operations.

Our reliance on third-party suppliers, manufacturers and service providers to secure equipment, parts, components and sub-systems used in our operations exposes us to potential volatility in the quality, prices and availability of such items. Certain high-specification parts and equipment that we use in our operations may be available only from a small number of suppliers, manufacturers or service providers, or in some cases must be sourced through a single supplier, manufacturer or service provider. Recent industry consolidation has reduced the number of available suppliers. A disruption in the deliveries from such third-party suppliers, manufacturers or service providers, capacity constraints, production disruptions, price increases, quality control issues, recalls or other decreased availability of parts and equipment could adversely affect our ability to meet our commitments to customers, thus adversely impacting our operations and revenues or increase our operating costs.

Our long-term contracts are subject to the risk of cost increases, which could adversely impact our profitability.

In general, our costs increase as the demand for contract drilling services and skilled labor increases. While many of our contracts include cost escalation provisions that allow changes to our day rate based on stipulated cost increases or decreases, the timing and amount earned from these day rate adjustments may differ from our actual increase in costs and certain contracts do not allow for such day rate adjustments. During times of reduced demand, reductions in costs may not be immediate as portions of the crew may be required to prepare our rigs for stacking, after which time the crew members are assigned to active rigs or dismissed. Moreover, as our rigs are mobilized from one geographic location to another, the labor and other operating and maintenance costs can vary significantly. In general, labor costs increase primarily due to higher salary levels and inflation. Equipment maintenance expenses

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fluctuate depending upon the type of activity a drilling rig is performing and the age and condition of the equipment. Contract preparation expenses vary based on the scope and length of contract preparation required.

Our information technology systems are subject to cybersecurity risks and threats.

We depend on technologies, systems, and networks to conduct our offshore and onshore operations, to collect payments from customers and to pay vendors and employees.  The risks associated with cyber incidents and attacks to our information technology systems could include disruptions of certain systems on our rigs; other impairments of our ability to conduct our operations; loss of intellectual property, proprietary information or customer data; disruption of our customers' operations; and increased costs to prevent, respond to or mitigate cybersecurity events.  If we were to experience a cyber-attack or incident, it could adversely affect our financial position, results of operations and cash flows.

Tax authorities may challenge our tax positions, and we may not be able to realize expected tax benefits.

Our tax positions are subject to audit by U.K., U.S. and other foreign tax authorities. Such tax authorities may disagree with our interpretations or assessments of the effects of tax laws, treaties, or regulations or their applicability to our corporate structure or certain transactions we have undertaken. Even if we are successful in maintaining our positions, we may incur significant expenses in defending our position and contesting claims or positions asserted by tax authorities. If we are unsuccessful in defending them, such audits could significantly impact our consolidated effective income tax rate in past or future periods.

We cannot provide any assurances as to what our consolidated effective income tax rate will be because of, among other matters, uncertainty regarding the nature and extent of our business activities in any particular jurisdiction in the future and the tax laws of such jurisdictions, as well as potential changes in U.K., U.S. and other foreign tax laws, regulations or treaties or the interpretation or enforcement thereof, changes in the administrative practices and precedents of tax authorities or any reclassification or other matter (such as changes in applicable accounting rules) that increases the amounts we have provided for income taxes or deferred tax assets and liabilities in our consolidated financial statements. If we are unable to mitigate the negative consequences of any change in law, audit or other matter, this could cause our consolidated effective income tax rate to increase and cause a material adverse effect on our financial position, operating results and/or cash flows.    

Governments may pass laws that subject us to additional taxation or may challenge our tax positions, which could adversely affect our financial position, results of operations and cash flows.

There is increasing uncertainty with respect to tax laws, regulations and treaties, and the interpretation and enforcement thereof that may affect our business.  In July 2014, the U.K. government enacted tax reforms to ensure that more of the profits generated by offshore drilling contractors in the U.K. are subject to U.K. taxation.  The reforms limit the amount of certain types of lease payments that can be deducted for U.K. tax purposes. In addition, the reforms prohibit taxable profits from operations on the U.K. Continental Shelf from being reduced by unrelated losses or expenses.  Other countries are evaluating legislative and regulatory reforms that would subject us to additional taxation or otherwise challenge our tax positions.  Further, our tax positions are subject to audit by U.K., U.S. and other foreign tax authorities. Such tax authorities may disagree with our interpretations or assessments of the effects of tax laws, treaties, or regulations or their applicability to our corporate structure or certain transactions we have undertaken. Even if we are successful in maintaining our positions, we may incur significant expenses in defending our position and contesting claims or positions asserted by tax authorities. If we are unsuccessful in defending them, such audits could significantly impact our consolidated effective income tax rate in past or future periods.

As a result of these uncertainties, as well as changes in the administrative practices and precedents of tax authorities or any reclassification or other matter (such as changes in applicable accounting rules) that increases the amounts we have provided for income taxes or deferred tax assets and liabilities in our consolidated financial statements, we cannot provide any assurances as to what our consolidated effective income tax rate will be in future periods.  If we are unable to mitigate the negative consequences of any change in law, audit or other matter, this could cause our

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consolidated effective income tax rate to increase and cause a material adverse effect on our financial position, operating results and/or cash flows.

Risks Related to Our Redomestication to the U.K.

There are risks associated with the issuance and trading of our Class A ordinary shares that were not associated with our American Depositary Shares ("ADS").

In connection with the May 2012 termination of our ADS facility and the conversion of our outstanding ADSs into Class A ordinary shares, we entered into arrangements with The Depository Trust Company ("DTC") whereby DTC has accepted such 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 entered into this structure in part so that transfers of our shares held in book entry form through DTC will not be subject to a charge for stamp duty or stamp duty reserve tax (“SDRT”) in the U.K. Generally, stamp duty and/or 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% of the consideration paid for the transfer. Certain transfers of shares to depositaries or into clearance systems, such as DTC, are charged at a higher rate of 1.5%. 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.

We have obtained a favorable ruling from Her Majesty's Revenue & Customs ("HMRC") in respect of stamp duty and SDRT in relation to both the conversion and also our arrangement with DTC. Furthermore, following decisions of the European Court of Justice and the U.K. First-tier Tax Tribunal, HMRC has announced that they will not seek to apply a charge to stamp duty or SDRT on the issuance of shares (or, where it is integral to the raising of new capital, the transfer of new shares) into depository receipt or clearance systems, such as DTC. However, it is possible that the U.K. government may change or enact laws applicable 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 such 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.

We have not requested a ruling from HMRC on the U.K. tax aspects of the redomestication, and HMRC may disagree with our conclusion.

We believe that our redomestication to the U.K. in December 2009 did not result in any material U.K. corporation tax liability to Ensco plc, based on relevant U.K. corporation tax law and the current U.K.-U.S. income tax treaty. Further, we believe that we have satisfied all SDRT payment and filing obligations in connection with the issuance and deposit of our Class A ordinary shares into the ADS facility pursuant to the deposit agreement governing the ADS facility.

However, if HMRC disagrees with this view, it may take the position that material U.K. corporation tax or SDRT liabilities or amounts on account thereof are payable by Ensco plc as a result of the redomestication, in which case we expect that we would contest such assessment. If we were unsuccessful in disputing the assessment, the implications could be materially adverse to our financial position, operating results and/or cash flows. We have not requested an HMRC ruling on the U.K. tax aspects of the redomestication, and there can be no assurance that HMRC will agree with our interpretations of U.K. corporation tax law or any related matters associated therewith.

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Expected financial, logistical and operational benefits of our redomestication to the U.K. may not be realized.

We cannot be assured that all of the goals of the redomestication will be achieved, particularly as achievement of our goals is in many important respects subject to factors that we do not control. These factors include the reactions of U.K. and U.S. tax authorities, the reactions of third parties with whom we enter into contracts and conduct business and the reactions of investors and analysts.

Whether we realize other expected financial benefits of the redomestication will depend on a variety of factors, many of which are beyond our control. These factors include changes in the relative rate of economic growth in the U.K. compared to the U.S., our financial performance in jurisdictions with lower tax rates, foreign currency exchange rate fluctuations, and significant changes in trade, monetary or fiscal policies of the U.K. or the U.S., including changes in taxation or interest rates. It is difficult to predict or quantify the effect of these factors, individually and in the aggregate, in part because the occurrence of any of these events or circumstances may be interrelated. If any of these events or circumstances occur, we may not be able to realize the expected financial benefits of the redomestication, and our expenses may increase to a greater extent than if we had not completed the redomestication.

    Realization of the logistical and operational benefits of the redomestication is also dependent on a variety of factors including the geographic regions in which our drilling rigs are deployed, the location of the business unit offices that oversee our global offshore contract drilling operations, the locations of our customers' corporate offices and principal areas of operation and the location of our investors. If events or changes in circumstances occur affecting the aforementioned factors, we may not be able to realize the expected logistical and operational benefits of the redomestication.

Investor enforcement of civil judgments against us may be more difficult.

Because our parent company is now a public limited company incorporated under the Laws of England and Wales, investors could experience more difficulty enforcing judgments obtained against us in U.S. courts than would have been the case for U.S. judgments obtained against us prior to the redomestication. In addition, it may be more difficult (or impossible) to bring some types of claims against us in courts in England than it would be to bring similar claims against a U.S. company in a U.S. court.

We have less flexibility as a U.K. public limited company with respect to certain aspects of capital management than U.S. corporations due to increased shareholder approval requirements.

Directors of Delaware and other U.S. corporations may issue, without further shareholder approval, shares of common stock authorized in their certificates of incorporation that were not already issued or reserved.  The business corporation laws of Delaware and other U.S. states also provide substantial flexibility in establishing the terms of preferred stock. However, English law provides that a board of directors may only allot shares with the prior authorization of an ordinary resolution of the shareholders, which authorization must state the maximum amount of shares that may be allotted under it and specify the date on which it will expire, which must not be more than five years from the date on which the shareholder resolution is passed. An ordinary resolution was passed by shareholders at our last annual meeting in 2014 to authorize the allotment of additional shares for a one-year term. As this authority will expire in May 2015, an ordinary resolution will be put to shareholders at our next annual shareholder meeting seeking their approval to renew the board's authority to allot shares for an additional one-year term.

English law also generally provides shareholders pre-emption rights over new shares that are issued for cash. However, it is possible, where the board of directors is generally authorized to allot shares, to exclude pre-emption rights by a special resolution of the shareholders or by a provision in the articles of association. Such exclusion of pre-emption rights will cease to have effect when the general allotment authority to which it relates is revoked or expires. If the general allotment authority is renewed, the authority excluding pre-emption rights may also be renewed by a special resolution of the shareholders. A special resolution was passed, in conjunction with an allotment authority at our last annual shareholder meeting in 2014, to exclude pre-emption rights for a one-year term. As this authority will expire

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in May 2015, a special resolution will be put to shareholders at our next annual shareholder meeting seeking their approval to renew the board's authority to exclude pre-emption rights for an additional one-year term.

English law prohibits us from conducting "on-market purchases" as our shares will not be traded on a recognized investment exchange in the U.K. English law also generally prohibits a company from repurchasing its own shares by way of "off-market purchases" without the approval by a special resolution of the shareholders of the terms of the contract by which the purchase(s) is affected. Such approval may only last for a maximum period of five years after the date on which the resolution is passed. A special resolution was passed at the Company's annual shareholder meeting in May 2013 to permit the Company to make "off-market" purchases of its own shares pursuant to certain purchase agreements for a five-year term.

We have no assurances that situations will not arise where such shareholder approval requirements for any of these actions would deprive our shareholders of substantial benefits.

Our articles of association contain anti-takeover provisions.

Certain provisions of our articles of association have anti-takeover effects, such as the ability to issue shares under the Rights Plan (as defined therein). These provisions are intended to ensure that any takeover or change of control of the Company is conducted in an orderly manner, all members of the Company are treated equally and fairly and receive an optimum price for their shares and the long-term success of the Company is safeguarded. Under English law, it may not be possible to implement these provisions in all circumstances.

The Company is not subject to the U.K.'s Code on Takeovers and Mergers (the “Code”).

The Code only applies to an offer for a public company that is registered in the U.K. (or the Channel Islands or the Isle of Man) and securities of which are not admitted to trading on a regulated market in the U.K. (or the Channel Islands or the Isle of Man) if the company is considered by the Takeover Panel to have its place of central management and control in the U.K. (or the Channel Islands or the Isle of Man). This is known as the "residency test." The test for central management and control under the Takeover Code is different from that used by the U.K. tax authorities. Under the Takeover Code, the Panel will look to where the majority of the directors of the company are themselves resident for the purposes of determining where the company has its place of central management and control. Accordingly, the Code does not currently apply to the Company and the Company therefore does not have the benefit of the protections the Code affords, including, but not limited to, the requirement that a person who acquires an interest in shares carrying 30% or more of the voting rights in the Company must make a cash offer to all other shareholders at the highest price paid in the 12 months before the offer was announced.

English law requires that we meet certain additional financial requirements before we declare dividends and return funds to shareholders.

Under English law, we are only able to declare dividends and return funds to our shareholders out of the accumulated distributable reserves on our statutory balance sheet. Distributable reserves are a company’s accumulated, realized profits, so far as not previously utilized by distribution or capitalization, less its accumulated, realized losses, so far as not previously written off in a reduction or reorganization of capital duly made. Realized profits are created through the remittance of profits of certain subsidiaries to our parent company in the form of dividends.

English law also provides that a public company can only make a distribution if, among other things (a) the amount of its net assets (that is, the total excess of assets over liabilities) is not less than the total of its called up share capital and non-distributable reserves and (b) if, and to the extent that, the distribution does not reduce the amount of its net assets to less than that total.

We may be unable to remit the profits of our subsidiaries in a timely or tax efficient manner. If at any time we do not have sufficient distributable reserves to declare and pay quarterly dividends, we may undertake a reduction in the capital of the Company, in addition to the reduction in capital taken in 2014, to reduce the amount of our share

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capital and non-distributable reserves and to create a corresponding increase in our distributable reserves out of which future distributions to shareholders can be made. To comply with English law, a reduction of capital would be subject to (a) approval of shareholders at the annual shareholder meeting by special resolution; (b) confirmation by an order of the English Courts and (c) the Court order being delivered to and registered by the Registrar of Companies in England. If we were to pursue a reduction of capital of the Company as a course of action, and failed to obtain the necessary approvals from shareholders and the English Courts, we may undertake other efforts to allow the Company to declare dividends and return funds to shareholders.

Item 1B.Unresolved Staff Comments

None.

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Item 2.Properties

Contract Drilling Fleet

The following table provides certain information about the rigs in our drilling fleet by reportable segment as of March 2, 2015:

Rig Name	Rig Type	Year Built/ Rebuilt	Design	Maximum  Water Depth/ Drilling Depth	Location	Customer
Floaters
ENSCO DS-1	Drillship	1999/2012	Dynamically Positioned	6,000'/30,000'	Angola	TOTAL
ENSCO DS-2	Drillship	1999	Dynamically Positioned	6,000'/30,000'	Spain	Stacking preparations
ENSCO DS-3	Drillship	2010	Dynamically Positioned	10,000'/40,000'	Gulf of Mexico	BP
ENSCO DS-4	Drillship	2010	Dynamically Positioned	10,000'/40,000'	Gulf of Mexico	BP
ENSCO DS-5	Drillship	2011	Dynamically Positioned	10,000'/40,000'	Gulf of Mexico	Petrobras/Murphy
ENSCO DS-6	Drillship	2012	Dynamically Positioned	10,000'/40,000'	Angola	BP
ENSCO DS-7	Drillship	2013	Dynamically Positioned	10,000'/40,000'	Angola	TOTAL
ENSCO DS-8	Drillship(1)	2015	Dynamically Positioned	10,000'/40,000'	South Korea	Under construction(3)
ENSCO DS-9	Drillship(1)	2015	Dynamically Positioned	10,000'/40,000'	South Korea	Under construction(3)
ENSCO DS-10	Drillship(2)	2015	Dynamically Positioned	10,000'/40,000'	South Korea	Under construction(3)
ENSCO 5001	Semisubmersible	1977/1999/2009	Sonat	5,000'/25,000'	Malaysia	Cold stacked
ENSCO 5002	Semisubmersible	1975/2001	Aker H-3	1,000'/25,000'	Singapore	Cold stacked
ENSCO 5004	Semisubmersible	1982/2001/2014	F&G Enhanced Pacesetter	1,500'/25,000'	Mediterranean	Mellitah
ENSCO 5005	Semisubmersible	1982/2014	F&G Enhanced Pacesetter	1,500'/25,000'	Myanmar	PTTEP
ENSCO 5006	Semisubmersible	1999/2014	Bingo 8000	6,200'/25,000'	Australia	Inpex
ENSCO 6000	Semisubmersible	1987/1996	Dynamically Positioned	3,400'/12,000'	Spain	Cold stacked
ENSCO 6001	Semisubmersible	2000/2010/2014	Megathyst	5,700'/25,000'	Brazil	Petrobras
ENSCO 6002	Semisubmersible	2001/2009	Megathyst	5,700'/25,000'	Brazil	Petrobras
ENSCO 6003	Semisubmersible	2004	Megathyst	5,700'/25,000'	Brazil	Petrobras
ENSCO 6004	Semisubmersible	2004	Megathyst	5,700'/25,000'	Brazil	Petrobras
ENSCO 7500	Semisubmersible	2000	Dynamically Positioned	8,000'/30,000'	Spain	Cold stacked
ENSCO 8500	Semisubmersible	2008	Dynamically Positioned	8,500'/35,000'	Gulf of Mexico	Anadarko/Eni
ENSCO 8501	Semisubmersible	2009	Dynamically Positioned	8,500'/35,000'	Gulf of Mexico	Not contracted
ENSCO 8502	Semisubmersible	2010/2012	Dynamically Positioned	8,500'/35,000'	Gulf of Mexico	Talos
ENSCO 8503	Semisubmersible	2010	Dynamically Positioned	8,500'/35,000'	Gulf of Mexico	LLOG
ENSCO 8504	Semisubmersible	2011	Dynamically Positioned	8,500'/35,000'	Malaysia	Shell
ENSCO 8505	Semisubmersible	2012	Dynamically Positioned	8,500'/35,000'	Gulf of Mexico	Deep Gulf Energy
ENSCO 8506	Semisubmersible	2012	Dynamically Positioned	8,500'/35,000'	Gulf of Mexico	Anadarko
Jackups
ENSCO 52	Jackup	1983/1997/2013	F&G L-780 MOD II-C	300'/25,000'	Malaysia	Murphy
ENSCO 53	Jackup	1982/2009	F&G L-780 MOD II-C	300'/25,000'	UAE	NDC
ENSCO 54	Jackup	1982/1997/2014	F&G L-780 MOD II-C	300'/25,000'	Saudi Arabia	Saudi Aramco
ENSCO 56	Jackup	1982/1997	F&G L-780 MOD II-C	300'/25,000'	Indonesia	Pertamina
ENSCO 58	Jackup	1981/2002	F&G L-780 MOD II	250'/30,000'	Saudi Arabia	Stacking preparations
ENSCO 67	Jackup	1976/2005	MLT 84-CE	400'/30,000'	Indonesia	Pertamina
ENSCO 68	Jackup	1976/2004	MLT 84-CE	400'/30,000'	Gulf of Mexico	Chevron
ENSCO 70	Jackup	1981/1996/2014	Hitachi K1032N	250'/30,000	United Kingdom	Not contracted
ENSCO 71	Jackup	1982/1995/2012	Hitachi K1032N	225'/25,000'	Denmark	Maersk
ENSCO 72	Jackup	1981/1996	Hitachi K1025N	225'/25,000'	Denmark	Maersk

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Rig Name	Rig Type	Year Built/   Rebuilt	Design	Maximum  Water Depth/ Drilling Depth	Current Location	CurrentCustomer
Jackups
ENSCO 75	Jackup	1999	MLT Super 116-C	400'/30,000'	Gulf of Mexico	Talos
ENSCO 76	Jackup	2000	MLT Super 116-C	400'/30,000'	Saudi Arabia	Saudi Aramco
ENSCO 80	Jackup	1978/1995	MLT 116-CE	225'/30,000'	United Kingdom	GDF
ENSCO 81	Jackup	1979/2003	MLT 116-C	350'/30,000'	Gulf of Mexico	Stacking preparations
ENSCO 82	Jackup	1979/2003	MLT 116-C	300'/30,000'	Gulf of Mexico	Stacking preparations
ENSCO 84	Jackup	1981/2005/2012	MLT 82-SD-C	250'/25,000'	Saudi Arabia	Saudi Aramco
ENSCO 86	Jackup	1981/2006	MLT 82-SD-C	250'/30,000'	Gulf of Mexico	Century
ENSCO 87	Jackup	1982/2006	MLT 116-C	350'/25,000'	Gulf of Mexico	Fieldwood
ENSCO 88	Jackup	1982/2004/2014	MLT 82-SD-C	250'/25,000'	Saudi Arabia	Saudi Aramco
ENSCO 90	Jackup	1982/2002	MLT 82-SD-C	250'/25,000'	Gulf of Mexico	Cold stacked
ENSCO 91	Jackup	1980/2001/2012	Hitachi Zosen	270'/20,000'	Saudi Arabia	Saudi Aramco
ENSCO 92	Jackup	1982/1996	MLT 116-C	225'/25,000'	United Kingdom	ConocoPhillips
ENSCO 94	Jackup	1981/2001/2013	Hitachi 250-C	250'/25,000'	Saudi Arabia	Saudi Aramco
ENSCO 96	Jackup	1982/1997/2012	Hitachi 250-C	250'/25,000'	Saudi Arabia	Saudi Aramco
ENSCO 97	Jackup	1980/1997/2012	MLT 82 SD-C	250'/25,000'	Saudi Arabia	Saudi Aramco
ENSCO 99	Jackup	1985/2005	MLT 82 SD-C	250'/30,000'	Gulf of Mexico	Stacking preparations
ENSCO 100	Jackup	1987/2009	MLT 150-88-C	350'/30,000	United Kingdom	Ithaca
ENSCO 101	Jackup	2000	KELFS MOD V-A	400'/30,000'	United Kingdom	Shipyard/BP
ENSCO 102	Jackup	2002	KELFS MOD V-A	400'/30,000'	United Kingdom	ConocoPhillips
ENSCO 104	Jackup	2002	KELFS MOD V-B	350'/30,000'	Myanmar	PVEP
ENSCO 105	Jackup	2002	KELFS MOD V-B	400'/30,000'	China	Shell
ENSCO 106	Jackup	2005	KELFS MOD V-B	400'/30,000'	Malaysia	CPOC
ENSCO 107	Jackup	2006	KELFS MOD V-B	400'/30,000'	New Zealand	OMV
ENSCO 108	Jackup	2007	KELFS MOD V-B	400'/30,000'	Thailand	PTTEP
ENSCO 109	Jackup	2008	KELFS MOD V-Super B	350'/35,000'	Angola	Chevron
ENSCO 110	Jackup(2)	2015	KELFS MOD V-B	400'/30,000'	Singapore	Under construction(3)
ENSCO 120	Jackup	2013	KFELS Super A	400'/40,000'	United Kingdom	Nexen
ENSCO 121	Jackup	2013	KFELS Super A	400'/40,000'	Netherlands	Wintershall
ENSCO 122	Jackup	2014	KFELS Super A	400'/40,000'	United Kingdom	NAM
ENSCO 123	Jackup(2)	2016	KFELS Super A	400'/40,000'	Singapore	Under construction(3)
ENSCO 140	Jackup(2)	2016	Cameron Letourneau Super 116E	400'/30,000'	Dubai	Under construction(3)
ENSCO 141	Jackup(2)	2016	Cameron Letourneau Super 116E	400'/30,000'	Dubai	Under construction(3)

⁽¹⁾  ENSCO DS-9 is currently scheduled for delivery during the first quarter of 2015 and is committed under a long-term contract in the U.S. Gulf of Mexico. ENSCO DS-8 is currently scheduled for delivery during the second quarter of 2015 and is committed under a long-term contract in Angola.

⁽²⁾  We currently are marketing ENSCO DS-10, ENSCO 110, ENSCO 123, ENSCO 140 and ENSCO 141. For additional information on our rigs under construction, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations."

⁽³⁾  Rig currently is under construction. The "year built" provided is based on the current construction schedule.

The equipment on our drilling rigs includes engines, drawworks, derricks, pumps to circulate drilling fluid, well control systems, drill string and related equipment. The engines power a top-drive mechanism that turns the drill string and drill bit so that the hole is drilled by grinding subsurface materials, which are then returned to the rig by the drilling fluid. The intended water depth, well depth and geological conditions are the principal factors that determine the size and type of rig most suitable for a particular drilling project.

Floater rigs consist of drillship rigs and semisubmersible rigs. Drillship rigs are maritime vessels that have been outfitted with drilling apparatus.  Drillships are self-propelled and can be positioned over a drill site through the use of a computer-controlled propeller or "thruster" (dynamic positioning) system.  Our drillships are capable of drilling in water depths of 10,000 feet or less and are suitable for deepwater drilling in remote locations because of their mobility

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and large load-carrying capacity.  Although drillships are most often used for deepwater drilling and exploratory well drilling, drillships can also be used as a platform to carry out well maintenance or completion work such as casing and tubing installation or subsea tree installations.

Semisubmersible rigs are mobile offshore drilling units with pontoons and columns that are partially submerged at the drilling location to provide added stability during drilling operations. Semisubmersible rigs are held in a fixed location over the ocean floor either by being anchored to the sea bottom with mooring chains (moored semisubmersible rig) or dynamically positioned by computer-controlled propellers or "thrusters" (dynamically positioned semisubmersible rig) similar to that used by our drillships.  Moored semisubmersible rigs are most commonly used for drilling in water depths of 4,499 feet or less.  However, ENSCO 5006, which is a moored semisubmersible rig, is capable of deepwater drilling in water depths greater than 5,000 feet.  Dynamically positioned semisubmersible rigs generally are outfitted for drilling in deeper water depths and are well-suited for deepwater development and exploratory well drilling.

Jackup rigs stand on the ocean floor with their hull and drilling equipment elevated above the water on connected leg supports. Jackup rigs are generally preferred over other rig types in shallow water depths of 400 feet or less, primarily because jackup rigs provide a more stable drilling platform with above water well control equipment. Our jackup rigs are of the independent leg design where each leg can be fixed into the ocean floor at varying depths and equipped with a cantilever that allows the drilling equipment to extend outward from the hull over fixed platforms enabling safer drilling of both exploratory and development wells. The jackup rig hull supports the drilling equipment, jacking system, crew quarters, storage and loading facilities, helicopter landing pad and related equipment and supplies.

Over the life of a typical rig, many of the major systems are replaced due to normal wear and tear or technological advancements in drilling equipment. We believe all our rigs are in good condition. As of March 2, 2015, we owned all rigs in our fleet. We also manage the drilling operations for six rigs owned by third-parties. 

We lease our executive offices in London, England in addition to office space in Houston, Texas, Angola, Australia, Denmark, Dubai, Indonesia, Korea, Malaysia, Mexico, Saudi Arabia, Scotland, Singapore, Switzerland and several additional international locations. We own offices and other facilities in Louisiana and Brazil.

Item 3.  Legal Proceedings

Pride FCPA Investigation

During 2010, Pride and its subsidiaries resolved their previously disclosed investigations into potential violations of the FCPA with the DOJ and SEC. The settlement with the DOJ included a deferred prosecution agreement (the "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. During 2012, the DOJ moved to (i) dismiss the charges against Pride and end the DPA one year prior to its scheduled expiration; and (ii) terminate the unsupervised probation of Pride Forasol, S.A.S. The Court granted the motions.

     Pride has 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 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 business. We could also face other third-party claims by directors, officers, employees, affiliates, advisors, attorneys, agents, stockholders, 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 clients and potential clients, to attract and retain employees and to access the capital markets.

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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 position, 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 Illinois, Mississippi, Texas, Louisiana and the UK by approximately 125 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.

During 2013, we reached an agreement in principle with 58 of the plaintiffs to settle lawsuits filed in Mississippi for a nominal amount. A special master reviewed all 58 cases and made an allocation of settlement funds among the parties.  The District Court Judge reviewed the allocations and accepted the special master’s recommendations and approved the settlements.  The settlement documents and final documentation for the individual plaintiffs are being processed.

We intend to vigorously defend against the remaining 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 Illinois, Mississippi, Texas, Louisiana and the UK, we have other asbestos or lung injury claims pending against us in litigation in other jurisdictions. Although we do not expect 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 are currently subject to pending notices of assessment relating to spills of drilling fluids, oil, chemicals, grease or fuel from drilling rigs operating offshore Brazil from 2008 to 2014, pursuant to which the governmental authorities have assessed, or are anticipated to assess, fines in an aggregate amount of approximately $250,000. We have contested these notices and appealed certain adverse decisions and are awaiting decisions in these cases. Although we do not expect final disposition 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 $250,000 liability related to these matters was included in accrued liabilities and other on our consolidated balance sheet as of December 31, 2014.

We currently are subject to a pending administrative proceeding initiated during 2009 by a Spanish government authority seeking payment in an aggregate amount of approximately $4.0 million for an alleged environmental spill originating from 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 during 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 vigorously defend ourselves 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 final disposition of this matter 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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We received a notice of assessment from the Bureau of Safety and Environmental Enforcement ("BSEE") in June 2014 relating to an unintended disconnect on ENSCO 8500, pursuant to which BSEE assessed a fine in the amount of $330,000. Following an August 2014 meeting with BSEE representatives to discuss and review the penalty notice and underlying facts, BSEE reduced the civil penalty assessment from $330,000 to $70,000. The $70,000 was paid and included in contract drilling expense in our consolidated statement of operations for the year ended December 31, 2014.

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 4.  Mine Safety Disclosures

    Not applicable.

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PART II

Item 5. Market for Registrant's Common Equity, Related Shareholder Matters and Issuer Purchases of Equity Securities

Market Information

The following table provides the high and low sales price of our Class A ordinary share, par value U.S. $0.10 per share, for each period indicated during the last two fiscal years:

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Year
2014 High	$	57.45	$	55.89	$	55.74	$	41.99	$	57.45
2014 Low	$	47.85	$	48.53	$	40.91	$	25.88	$	25.88
2013 High	$	65.82	$	64.14	$	61.96	$	62.25	$	65.82
2013 Low	$	56.78	$	51.01	$	53.64	$	53.49	$	51.01

Our Class A ordinary shares are traded on the NYSE under the ticker symbol "ESV." Many of our shareholders hold shares electronically, all of which are owned by a nominee of The Depository Trust Company. We had 75 shareholders of record on February 1, 2015.

Dividends

The following table provides the quarterly cash dividend per share declared and paid during the last two fiscal years:

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Year
2014	$	.75	$	.75	$	.75	$	.75	$	3.00
2013	$	.50	$	.50	$	.50	$	.75	$	2.25

To improve capital management flexibility in light of market conditions, our Board of Directors declared a $0.15 quarterly cash dividend per Class A ordinary share for the first quarter of 2015, a $0.60 reduction from the prior level. Dividend payments are subject to approval by our Board of Directors and could change in future periods. When evaluating dividend payment timing and amounts, our Board of Directors considers several factors, including our profitability, liquidity, financial condition, reinvestment opportunities and capital requirements.

Exchange Controls

There are no U.K. government laws, decrees or regulations that restrict or affect the export or import of capital, including but not limited to, foreign exchange controls on remittance of dividends on our ordinary shares or on the conduct of our operations.

U.K. Taxation

The following paragraphs are intended to be a general guide to current U.K. tax law and what is understood to be HMRC practice applying as of the date of this report (both of which are subject to change at any time, possibly with retrospective effect) in respect of the taxation of capital gains, the taxation of dividends paid by us and stamp duty and SDRT on the transfer of our shares. In addition, the following paragraphs relate only to persons who for U.K. tax purposes are beneficial owners of the shares (“shareholders”).

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These paragraphs may not relate to certain classes of holders or beneficial owners of shares, such as our employees or directors, persons who are connected with us, insurance companies, charities, collective investment schemes, pension schemes, trustees or persons who hold shares other than as an investment, or U.K. resident individuals who are not domiciled in the U.K. or who are subject to split-year treatment.

These paragraphs do not describe all of the circumstances in which shareholders may benefit from an exemption or relief from taxation. It is recommended that all shareholders obtain their own taxation advice. In particular, any shareholders who are non-U.K. resident or domiciled are advised to consider the potential impact of any relevant double tax treaties, including the Convention between the United States of America and the United Kingdom for the Avoidance of Double Taxation with respect to Taxes on Income, to the extent applicable.

U.K. Taxation of Dividends

U.K. Withholding Tax - Dividends paid by us will not be subject to any withholding or deduction for, or on account of, U.K. tax, irrespective of the residence or the individual circumstances of the shareholders.

U.K. Income Tax - An individual shareholder who is resident in the U.K. may, depending on his or her individual circumstances, be subject to U.K. income tax on dividends received from us. An individual shareholder who is not resident in the U.K. will not be subject to U.K. income tax on dividends received from us, unless that shareholder carries on (whether alone or in partnership) any trade, profession or vocation through a branch or agency in the U.K. and shares are used by, or held by or for, that branch or agency. In these circumstances, the non-U.K. resident shareholder may, depending on his or her individual circumstances, be subject to U.K. income tax on dividends received from us.

The rate of U.K. income tax payable with respect to dividends received by higher rate taxpayers in the tax year 2014/2015 is 32.5%. Individuals whose total income subject to income tax exceeds £150,000 will be subject to income tax in respect of dividends in excess of that amount at the rate of 37.5% in the tax year 2014/2015. An individual's dividend income is treated as the top slice of his or her total income subject to income tax.  Individual shareholders who are resident in the U.K. will be entitled to a tax credit equal to one-ninth of the amount of the dividend received from us, which will be taken into account in computing the gross amount of the dividend subject to income tax. The tax credit will be credited against the relevant shareholder's liability (if any) to income tax on the gross amount of the dividend. An individual shareholder who is not subject to U.K. income tax on dividends received from us will not be entitled to claim payment of the tax credit in respect of such dividends. The right to a tax credit for an individual shareholder who is not resident in the U.K. will depend on his or her individual circumstances.

U.K. Corporation Tax - Unless an exemption is available (as discussed below), a corporate shareholder that is resident in the U.K. will be subject to U.K. corporation tax on dividends received from us. A corporate shareholder that is not resident in the U.K. will not be subject to U.K. corporation tax on dividends received from us, unless that shareholder carries on a trade in the U.K. through a permanent establishment in the U.K. and the shares are used by, for or held by or for, the permanent establishment. In these circumstances, the non-U.K. resident corporate shareholder may, depending on its individual circumstances (and if no exemption is available), be subject to U.K. corporation tax on dividends received from us.

The main rate of corporation tax payable with respect to dividends received from us in the financial year 2015 is 20%. If dividends paid by us fall within any of the exemptions from U.K. corporation tax set out in Part 9A of the U.K. Corporation Tax Act 2009, the receipt of the dividend by a corporate shareholder generally will be exempt from U.K. corporation tax. Generally, the conditions for one or more of those exemptions from U.K. corporation tax on dividends paid by us should be satisfied, although the conditions that must be satisfied in any particular case will depend on the individual circumstances of the relevant corporate shareholder.

Shareholders that are regarded as small companies should generally be exempt from U.K. corporation tax on dividends received from us, unless the dividends are received as part of a tax advantage scheme. Shareholders that are not regarded as small companies should generally be exempt from U.K. corporation tax on dividends received from us on the basis that the shares should be regarded as non-redeemable ordinary shares. Alternatively, shareholders that are not small companies should also generally be exempt from U.K. corporation tax on dividends received from us if

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they hold shares representing less than 10% of our issued share capital, would be entitled to less than 10% of the profits available for distribution to our equity-holders and would be entitled on a winding up to less than 10% of our assets available for distribution to such equity-holders. In certain limited circumstances, the exemption from U.K. corporation tax will not apply to such shareholders if a dividend is made as part of a scheme that has a main purpose of falling within the exemption from U.K. corporation tax.

U.K. Taxation of Capital Gains

U.K. Withholding Tax - Capital gains accruing to non-U.K. resident shareholders on the disposal of shares will not be subject to any withholding or deduction for or on account of U.K. tax, irrespective of the residence or the individual circumstances of the relevant shareholder.

U.K. Capital Gains Tax - A disposal of shares by an individual shareholder who is resident in the U.K. may, depending on his or her individual circumstances, give rise to a taxable capital gain or an allowable loss for the purposes of U.K. capital gains tax (“CGT”). An individual shareholder who temporarily ceases to be resident or ordinarily resident in the U.K. for a period of less than five years and who disposes of his or her shares during that period of temporary non-residence may be liable to CGT on a taxable capital gain accruing on the disposal on his or her return to the U.K. under certain anti-avoidance rules.

An individual shareholder who is not resident in the U.K. will not be subject to CGT on capital gains arising on the disposal of their shares, unless that shareholder carries on a trade, profession or vocation in the U.K. through a branch or agency in the U.K. and the shares were acquired, used in or for the purposes of the branch or agency or used in or for the purposes of the trade, profession or vocation carried on by the shareholder through the branch or agency. In these circumstances, the relevant non-U.K. resident shareholder may, depending on his or her individual circumstances, be subject to CGT on chargeable gains arising from a disposal of his or her shares. The rate of CGT in the tax year 2014/2015 is 18% for basic rate taxpayers and 28% for higher and additional rate taxpayers.

U.K. Corporation Tax - A disposal of shares by a corporate shareholder resident in the U.K. may give rise to a chargeable gain or an allowable capital loss for the purposes of U.K. corporation tax. A corporate shareholder not resident in the U.K. will not be liable for U.K. corporation tax on chargeable gains accruing on the disposal of its shares, unless that shareholder carries on a trade in the U.K. through a permanent establishment in the U.K. and the shares were acquired, used in or for the purposes of the permanent establishment or used in or for the purposes of the trade carried on by the shareholder through the permanent establishment. In these circumstances, the relevant non-U.K. resident shareholder may, depending on its individual circumstances, be subject to U.K. corporation tax on chargeable gains arising from a disposal of its shares.

The financial year for U.K. corporation tax purposes runs from April 1 to March 31. The main rate of U.K. corporation tax on chargeable gains is 21% in the financial year 2014 and 20% in the financial year 2015. Corporate shareholders will be entitled to an indexation allowance in computing the amount of a chargeable gain accruing on a disposal of the shares, which will provide relief for the effects of inflation by reference to movements in the U.K. retail price index.

If the conditions of the applicable shareholding exemption are satisfied in relation to a chargeable gain accruing to a corporate shareholder on a disposal of its shares, the chargeable gain will be exempt from U.K. corporation tax. The conditions of the substantial shareholding exemption that must be satisfied will depend on the individual circumstances of the relevant corporate shareholder. One of the conditions of the substantial shareholding exemption that must be satisfied is that the corporate shareholder must have held a substantial shareholding in the Company throughout a twelve-month period beginning not more than two years before the day on which the disposal takes place. Ordinarily, a corporate shareholder will not be regarded as holding a substantial shareholding in us, unless it (whether alone, or together with other group companies) directly holds not less than 10% of our ordinary share capital.

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U.K. Stamp Duty and SDRT

The discussion below relates to shareholders wherever resident but not to holders such as market makers, brokers, dealers and intermediaries, to whom special rules apply. Special rules also apply in relation to certain stock lending and repurchase transactions.

Transfer of Shares held in book entry form via DTC - A transfer of shares held in book entry (i.e., electronic) form within the facilities of the DTC will not be subject to U.K. stamp duty or SDRT.

Transfers of Shares out of, or outside of, DTC - Subject to an exemption for certain low value transactions, a transfer of shares from within the DTC system out of that system or any transfer of shares that occurs entirely outside the DTC system generally will be subject to a charge to ad valorem U.K. stamp duty (normally payable by the transferee) at 0.5% of the purchase price of the shares (rounded up to the nearest multiple of £5). SDRT generally will be payable on an unconditional agreement to transfer such shares at 0.5% of the amount or value of the consideration for the transfer. However, such liability for SDRT generally will be cancelled and any SDRT paid will be refunded if the agreement is completed by a duly-stamped transfer within six years of either the date of the agreement or, if the agreement was conditional, the date when the agreement became unconditional.

We have put in place arrangements to require that shares held outside the facilities of DTC cannot be transferred into such facilities (including where shares are re-deposited into DTC by an existing shareholder) until the transferor of the shares has first delivered the shares to a depository we specified, so that SDRT may be collected in connection with the initial delivery to the depository. Before such transfer can be registered in our books, the transferor will be required to put in the depository funds to settle the resultant liability for SDRT, which will be 1.5% of the value of the shares, and to pay the transfer agent such processing fees as may be established from time to time.

Following a decision of the European Court of Justice in 2009 and a decision of the U.K. First-Tier Tax Tribunal in 2012, HMRC has announced that it will not seek to apply the 1.5% charge to stamp duty or SDRT on the issuance of shares (or, where it is integral to the raising of new capital, the transfer of new shares) into depository receipt or clearance systems, such as DTC. Thus, the 1.5% U.K. stamp duty or SDRT charge will apply only to the transfer of existing shares to clearance services or depositary receipt systems in circumstances where the transfer is not integral to the raising of new capital (for example, where shares are re-deposited into DTC by an existing shareholder). Investors should, however, be aware that this area may be subject to further developments in the future.

The above statements are intended only as a general guide to the current U.K. stamp duty and SDRT position. Transfers to certain categories of persons are not liable to U.K. stamp duty or SDRT and transfers to others may be liable at a higher rate than discussed above.

Equity Compensation Plans

For information on shares issued or to be issued in connection with our equity compensation plans, see "Part III, Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters."

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Issuer Purchases of Equity Securities

The following table provides a summary of our repurchases of our equity securities during the quarter ended December 31, 2014.

Issuer Purchases of Equity Securities
Period	Total Number of Securities Purchased(1)	Average Price Paid per Security		Total Number of Securities Purchased as Part of Publicly Announced Plans or Programs (2)	Approximate Dollar Value of Securities that May Yet Be Purchased Under Plans or Programs
October 1 - October 31	9,964	$	40.74	—	$	2,000,000,000
November 1 - November 30	4,826	$	40.44	—	$	2,000,000,000
December 1 - December 31	3,519	$	33.49	—	$	2,000,000,000
Total	18,309	$	39.27	—

⁽¹⁾ During the quarter ended December 31, 2014, equity securities were repurchased from employees and non-employee directors by an affiliated employee benefit trust in connection with the settlement of income tax withholding obligations arising from the vesting of share awards.  Such securities remain available for re-issuance in connection with employee share awards.

⁽²⁾ During 2013, our shareholders approved a new share repurchase program. Subject to certain provisions under English law, including the requirement of Ensco plc to have sufficient distributable reserves, we may purchase up to a maximum of $2.0 billion in the aggregate under the program, but in no case more than 35.0 million shares. The program terminates in May 2018.

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Performance Chart

The chart below presents a comparison of the five-year cumulative total return, assuming $100 invested on December 31, 2009 for Ensco plc, the Standard & Poor's 500 Stock Price Index, the Dow Jones U.S. Oil Equipment & Services Index and a self-determined peer group.Total return assumes the reinvestment of dividends, if any, in the security on the ex-dividend date. Since Ensco operates exclusively as an offshore drilling service company, a self-determined peer group composed exclusively of major offshore drilling service companies has been included as a comparison.^* 

	12/09	12/10	12/11	12/12	12/13	12/14
Ensco plc	100.00	137.12	123.73	160.74	161.14	90.33
S&P 500	100.00	115.06	117.49	136.30	180.44	205.14
Dow Jones US Oil Equipment & Services	100.00	127.34	111.51	111.88	143.66	118.91
Peer Group	100.00	95.68	78.05	93.87	104.04	47.69

____________________________________

* Our self-determined peer group is weighted according to market capitalization and consists of the following companies: Atwood Oceanics Inc., Diamond Offshore Drilling Inc., Noble Corporation, Rowan Companies plc, SeaDrill Ltd. and Transocean Ltd.

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Item 6.  Selected Financial Data

The financial data below should be read in conjunction with "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" and our consolidated financial statements and notes thereto included in "Item 8. Financial Statements and Supplementary Data."

	Year Ended December 31,
	2014			2013			2012			2011(1)			2010
	(in millions, except per share amounts)
Consolidated Statement of Operations Data
Revenues	$	4,564.5		$	4,323.4		$	3,638.8		$	2,443.2		$	1,384.7
Operating expenses
Contract drilling (exclusive of depreciation)	2,076.9			1,947.1			1,642.8			1,218.3			632.6
Loss on impairment	4,218.7			—			—			—			—
Depreciation	537.9			496.2			443.8			334.9			189.5
General and administrative	131.9			146.8			148.9			158.6			86.1
Operating (loss) income	(2,400.9		)	1,733.3			1,403.3			731.4			476.5
Other (expense) income, net	(147.9		)	(100.1		)	(98.6		)	(57.9		)	18.2
Provision for income taxes	140.5			203.1			228.6			105.6			93.9
(Loss) income from continuing operations	(2,689.3		)	1,430.1			1,076.1			567.9			400.8
(Loss) income from discontinued operations, net(2)	(1,199.2		)	(2.2		)	100.6			37.7			185.1
Net (loss) income	(3,888.5		)	1,427.9			1,176.7			605.6			585.9
Net income attributable to noncontrolling interests	(14.1		)	(9.7		)	(7.0		)	(5.2		)	(6.4		)
Net (loss) income attributable to Ensco	$	(3,902.6	)	$	1,418.2		$	1,169.7		$	600.4		$	579.5
(Loss) earnings per share – basic
Continuing operations	$	(11.70	)	$	6.09		$	4.62		$	2.90		$	2.76
Discontinued operations	(5.18		)	(0.01		)	0.43			0.19			1.30
	$	(16.88	)	$	6.08		$	5.05		$	3.09		$	4.06
(Loss) earnings per share - diluted
Continuing operations	$	(11.70	)	$	6.08		$	4.61		$	2.89		$	2.76
Discontinued operations	(5.18		)	(0.01		)	0.43			0.19			1.30
	$	(16.88	)	$	6.07		$	5.04		$	3.08		$	4.06
Net (loss) income attributable to Ensco shares - Basic and Diluted	$	(3,910.5	)	$	1,403.1		$	1,157.4		$	593.5		$	572.1
Weighted-average shares outstanding
Basic	231.6			230.9			229.4			192.2			141.0
Diluted	231.6			231.1			229.7			192.6			141.0
Cash dividends per share	$	3.00		$	2.25		$	1.50		$	1.40		$	1.08

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	Year Ended December 31,
	2014		2013		2012		2011(1)		2010
	(in millions)
Consolidated Balance Sheet (as of period end) and Cash Flow Statement Data
Working capital	$	1,830.2	$	487.9	$	734.2	$	348.7	$	1,087.7
Total assets	16,059.9		19,472.9		18,565.3		17,898.8		7,051.5
Long-term debt, net of current portion	5,885.6		4,718.9		4,798.4		4,877.6		240.1
Ensco shareholders' equity	8,215.0		12,791.6		11,846.4		10,879.3		5,959.5
Cash flows from operating activities of continuing operations	2,057.9		1,811.2		1,954.6		659.8		637.1

⁽¹⁾  Includes the results of Pride International, Inc. ("Pride") from May 31, 2011, the date of the Pride acquisition.  

⁽²⁾  See Note 10 to our consolidated financial statements included in "Item 8. Financial Statements and Supplementary Data" for information on discontinued operations.

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Item 7.  Management's Discussion and Analysis of Financial Condition and Results of Operations

INTRODUCTION

Our Business

We are one of the leading providers of offshore contract drilling services to the international oil and gas industry. We currently own and operate an offshore drilling rig fleet of 70 rigs, including seven rigs currently under construction, with drilling operations in most of the strategic markets around the globe. Our rig fleet includes ten drillships, 13 dynamically positioned semisubmersible rigs, five moored semisubmersible rigs and 42 jackup rigs.  Our fleet is the world's second largest amongst competitive rigs, our ultra-deepwater fleet is one of the newest in the industry, and our premium jackup fleet is the largest of any offshore drilling company.

Our customers include many of the leading national and international oil companies, in addition to many independent operators. We are among the most geographically diverse offshore drilling companies, with current operations and drilling contracts spanning approximately 20 countries on six continents in nearly every major offshore basin around the world. The markets in which we operate include Australia, Brazil, the Mediterranean, Mexico, the Middle East, the North Sea, Southeast Asia, the U.S. Gulf of Mexico and West Africa.

We provide drilling services on a "day rate" contract basis. Under day rate contracts, we provide a drilling rig and rig crews and receive a fixed amount per day for each day we are performing drilling or related services. Our customers bear substantially all of the ancillary costs of constructing the well and supporting drilling operations, as well as the economic risk relative to the success of the well. In addition, our customers may pay all or a portion of the cost of moving our equipment and personnel to and from the well site. We do not provide "turnkey" or other risk-based drilling services.

Our Industry

Operating results in the offshore contract drilling industry are cyclical and directly related to the demand for drilling rigs and the available supply of drilling rigs. While the cost of moving a rig and the availability of rig-moving vessels may cause the balance of supply and demand to vary somewhat between regions, significant variations between regions are generally of a short-term nature due to rig mobility.

Drilling Rig Demand

Demand for drilling rigs is directly related to the regional and worldwide levels of offshore exploration and development spending by oil and gas companies, which is beyond our control. The markets for our contract drilling services are cyclical.  Offshore exploration and development spending may fluctuate substantially from year-to-year and from region-to-region. Such spending fluctuations result from many factors, including:

• oil and natural gas supply and demand, 

• regional and global economic conditions and changes therein, 

• political, social and legislative environments in major oil-producing countries, 

• production and inventory levels and related activities of the Organization of Petroleum Exporting Countries ("OPEC") and other oil and natural gas producers, 

• capital allocation decisions by our customers, including the relative economics of offshore development versus onshore prospects,

• technological advancements that impact the methods or cost of oil and natural gas exploration and development, 

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• disruption to exploration and development activities due to hurricanes and other severe weather conditions and the risk thereof, and 

• the impact that these and other events, whether caused by economic conditions, international or national climate change regulations or other factors, may have on current and expected future oil and natural gas prices.

Recent changes in the offshore drilling market have led to a highly competitive contracting environment. Since October 1, 2014, the Brent crude oil price has declined from approximately $95 per barrel to approximately $60 per barrel on February 23, 2015. Operators have announced significant declines in capital spending in their 2015 budgets, including the cancellation or deferral of existing programs. These declines in capital spending levels, coupled with additional newbuild supply, have put significant pressure on day rates and utilization.

We expect that 2015 will be a challenging year for drilling contractors as customers wait to gain additional clarity on commodity pricing and seek to reduce costs in the near-term by attempting to sub-let contracted rig time and re-negotiate existing contract terms. We believe the current market dynamics will create a challenging contracting environment into 2016.

Since most factors that affect offshore exploration and development spending are beyond our control and because rig demand can change quickly, it is difficult for us to predict future industry conditions, demand trends or future operating results. Periods of low rig demand often result in excess rig supply, which generally results in reductions in utilization and day rates; conversely, periods of high rig demand often result in a shortage of rigs, which generally results in increased utilization and day rates.

Drilling Rig Supply

During the current newbuild cycle, various industry participants ordered the construction of 360 new drillships, semisubmersible rigs and jackup rigs, approximately160 of which were delivered during the last three years.

Currently, there are approximately 80 competitive newbuild drillships and semisubmersible rigs reported to be under construction, of which approximately 30 are expected to be delivered before the end of 2015. Roughly half of the anticipated 2015 deliveries are without contracts, leading drilling contractors to retire or stack 35 older floaters since September 2014 due to a lack of available contracting opportunities. We expect that additional floaters will be retired or stacked during 2015 as lower commodity prices have negatively impacted the number of incremental contracting opportunities.

Currently, there are approximately 120 competitive newbuild jackup rigs reported to be under construction, of which approximately half are being built by companies that have not historically operated offshore drilling rigs. Approximately 60 of these competitive newbuild jackups are expected before the end of 2015 and most of these rigs are without contracts. As a result, we expect retirements and stacking of jackups to accelerate during 2015. Currently, there are approximately 40 marketed jackups older than 30 years of age that are idle and do not have any contracted work. Additionally, approximately 80 competitive jackups that are 30 years of age or older have contracts that expire during 2015. Operating costs for idle rigs, as well as capital expenditures required to recertify rigs during regulatory surveys, may prove cost prohibitive, and drilling contractors may instead elect to retire or stack these rigs.

Rig loss or damage due to hurricanes, blowouts, craterings, punchthroughs and other operational events, and the limited availability of insurance for certain perils in some geographic regions, may impact the supply of offshore drilling rigs in a particular market and cause fluctuations in utilization and day rates.

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Drilling Rig Construction and Delivery

We remain focused on our long-established strategy of high-grading our fleet. We will continue to invest in the expansion of our fleet where we believe strategic opportunities exist.  During the three-year period ended December 31, 2014, we invested $3.3 billion in the construction of new drilling rigs.

During the second quarter, we entered into an agreement with Lamprell Energy Limited to construct two premium jackup rigs (ENSCO 140 and ENSCO 141). ENSCO 140 and ENSCO 141 are significantly enhanced versions of the LeTorneau Super 116E jackup design and will incorporate Ensco's patented Canti-Leverage Advantage^SM technology. These rigs are scheduled for delivery during the second quarter and the third quarter of 2016, respectively. Both of these rigs are currently uncontracted.

During 2013, we entered into agreements with KFELS to construct a premium jackup rig (ENSCO 110) and an ultra-premium harsh environment jackup rig (ENSCO 123). These rigs are scheduled for delivery during the first quarter of 2015 and the second quarter of 2016, respectively. Both of these rigs are currently uncontracted.

We previously entered into agreements with KFELS to construct three ultra-premium harsh environment jackup rigs (ENSCO 120, ENSCO 121 and ENSCO 122). ENSCO 122 was delivered during the third quarter of 2014 and commenced drilling operations under a long-term contract in the North Sea during the fourth quarter of 2014. ENSCO 121 was delivered during the fourth quarter of 2013 and commenced drilling operations under a long-term contract in the North Sea during the second quarter of 2014. ENSCO 120 was delivered during the third quarter of 2013 and commenced drilling operations under a long-term contract in the North Sea during the first quarter of 2014.

We currently have three ultra-deepwater drillships under construction (ENSCO DS-8, ENSCO DS-9 and ENSCO DS-10). ENSCO DS-9 and ENSCO DS-8 are committed under long-term contracts and currently scheduled for delivery during the first quarter and second quarter of 2015, respectively. ENSCO DS-10 is currently uncontracted and scheduled for delivery during the third quarter of 2015.

The expected delivery dates of our rig construction projects are subject to risks and may be delayed due to shipyard or third-party equipment vendor delays or at our election.

We expect cash flow generated during 2015 will primarily be used to fund capital expenditures, most notably milestone payments for newbuild rigs. Based on our balance sheet and contractual backlog of $9.7 billion, we believe future capital projects, debt service and dividend payments will primarily be funded from cash and cash equivalents, future operating cash flows and borrowings under our commercial paper program and/or revolving credit facility. We may decide to access debt and/or equity markets to raise additional capital, refinance existing debt or increase liquidity as necessary.

Divestitures

Our business strategy has been to focus on ultra-deepwater floater and premium jackup operations and de-emphasize other assets and operations considered to be non-core or that do not meet our standards for financial performance. Consistent with this strategy, we sold eleven jackup rigs, two moored semisubmersible rig and our last remaining barge rig during the three-year period ended December 31, 2014. We are currently marketing for sale an additional seven rigs, which were classified as held for sale in our financial statements as of December 31, 2014.

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Segment Highlights

Floaters

Operating results for our Floaters segment declined during 2014 due primarily to a $4.0 billion loss on impairment. Floater revenues grew slightly primarily due to the addition of ENSCO DS-7 to our fleet, but were more than offset by a $75.2 million, or 7%, increase in contract drilling expense. ENSCO DS-7 commenced drilling operations in Angola during the fourth quarter of 2013.

In January 2014, ENSCO DS-9 was contracted and is expected to commence a long-term contract in the U.S. Gulf of Mexico during the fourth quarter of 2015. In June 2014, ENSCO DS-8 was contracted and is expected to commence a long-term contract in Angola during the fourth quarter of 2015.

ENSCO 8503 executed a long-term contract in the U.S. Gulf of Mexico with a 2.5 year term commencing during the second quarter of 2015.     

 Jackups

Operating results for our Jackups segment declined during 2014 due to a $236.4 million loss on impairment. Excluding this loss, operating results improved primarily due to an increase in average day rates. In particular, premium jackup rigs earned significantly higher day rates due to increasing customer demand for more technologically capable rigs.

Ultra-premium harsh environment jackup rigs ENSCO 120 and ENSCO 122 commenced drilling operations under long-term contracts in the North Sea during the first and fourth quarters, respectively. Ultra-premium harsh environment jackup rig ENSCO 121 commenced drilling operations under a long-term contract in the Netherlands during the second quarter.

In the Middle East, ENSCO 76 was recontracted through December 2018 and ENSCO 84, ENSCO 96 and ENSCO 97 were recontracted through 2019.

ENSCO 109 executed a long-term contract in Angola, and ENSCO 52 executed a long-term contract in Malaysia, both with an expected term of three years.

During the second quarter, we entered into an agreement with Lamprell Energy Limited to construct two premium jackup rigs (ENSCO 140 and ENSCO 141). ENSCO 140 and ENSCO 141 are significantly enhanced versions of the LeTorneau Super 116E jackup design and will incorporate Ensco's patented Canti-Leverage Advantage^SM technology. These rigs are scheduled for delivery during the second quarter and the third quarter of 2016, respectively.

BUSINESS ENVIRONMENT

Floaters

During the first half of 2014, the floater contracting environment was highly competitive due to a reduction in capital spending by operators, as well as an increase in global supply due to the delivery of newbuild floaters. More recently, these challenges were exacerbated by a steep decline in commodity prices during the fourth quarter that accelerated toward year-end, which led customers to significantly reduce capital budgets for 2015. Cancellations and delays of drilling programs have increased, many rigs currently contracted are being sublet thereby creating incremental supply, and certain customers are requesting contract concessions. There are limited contracting opportunities in the current market, and day rates and utilization are expected to decline during 2015.

Currently, there are approximately 80 competitive newbuild drillships and semisubmersible rigs reported to be under construction, of which approximately 30 are expected to be delivered before the end of 2015. Roughly half

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of the anticipated 2015 deliveries are without contracts, leading drilling contractors to retire or stack 35 older floaters since September 2014 due to a lack of available contracting opportunities. We expect that additional floaters will be retired or stacked during 2015 as lower commodity prices have negatively impacted the number of incremental contracting opportunities.

Jackups

Demand for jackups has also dropped due to the steep decline in commodity prices. Cancellations and delays of drilling programs have increased, some rigs currently contracted are being sublet thereby creating incremental supply, and certain customers are requesting contract concessions. As a result, there are limited contracting opportunities in the current market, and day rates and utilization are expected to decline during 2015.

Currently, there are approximately 120 competitive newbuild jackup rigs reported to be under construction, of which approximately half are being built by companies that have not historically operated offshore drilling rigs. Approximately 60 of these competitive newbuild jackups are expected by year-end 2015, and most of these rigs are without contracts. As a result, we expect retirements and stacking of jackups to accelerate during 2015. Currently, there are approximately 40 marketed jackups older than 30 years of age that are idle and do not have any contracted work. Additionally, approximately 80 competitive jackups that are 30 years of age or older have contracts that expire during 2015. Operating costs for idle rigs as well as capital expenditures required to recertify rigs during regulatory surveys may prove cost prohibitive and drilling contractors may instead elect to retire or stack these rigs.

RESULTS OF OPERATIONS

The following table summarizes our consolidated results of operations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Revenues	$	4,564.5		$	4,323.4		$	3,638.8
Operating expenses
Contract drilling (exclusive of depreciation)	2,076.9			1,947.1			1,642.8
Loss on impairment	4,218.7			—			—
Depreciation	537.9			496.2			443.8
General and administrative	131.9			146.8			148.9
Operating (loss) income	(2,400.9		)	1,733.3			1,403.3
Other expense, net	(147.9		)	(100.1		)	(98.6		)
Provision for income taxes	140.5			203.1			228.6
(Loss) income from continuing operations	(2,689.3		)	1,430.1			1,076.1
(Loss) income from discontinued operations, net	(1,199.2		)	(2.2		)	100.6
Net (loss) income	(3,888.5		)	1,427.9			1,176.7
Net income attributable to noncontrolling interests	(14.1		)	(9.7		)	(7.0		)
Net (loss) income attributable to Ensco	$	(3,902.6	)	$	1,418.2		$	1,169.7

Revenues and contract drilling expenses increased by $241.1 million, or 6%, and $129.8 million, or 7%, respectively, for the year ended December 31, 2014 as compared to the prior year. The increase in revenues was primarily due to the addition of newbuild rigs to both our Floaters and Jackups segments and an increase in average day rates across our existing fleet, partially offset by a decline in utilization. The increase in contract drilling expense was due to the aforementioned additions to our fleet and higher personnel and repair and maintenance costs. During 2013, contract drilling expense included a $14.2 million provision for doubtful accounts for receivables related to drilling services provided to OGX Petróleo e Gás Participações S.A. ("OGX"). Our receivables with OGX were fully reserved on our consolidated balance sheet as of December 31, 2013.

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During 2014, we recorded a non-cash loss on impairment totaling $4.2 billion, of which $3.0 billion related to impairment of our Floater goodwill and $1.2 billion related to impairment of three floaters and ten jackups.

During 2013, revenues and contract drilling expense increased by $684.6 million, or 19%, and $304.3 million, or 19%, respectively, as compared to the prior year. The increase in revenues was primarily due to the addition of newbuild rigs to our Floaters segment and an increase in average day rates across our existing fleet, partially offset by a decline in utilization. The increase in contract drilling expense was due the aforementioned additions to our fleet and higher personnel costs, as well as the aforementioned provision for doubtful accounts related to OGX receivables.

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 periods as long-term contracts expire, and new contracts and/or options are priced at current market rates.

Rig Counts, Utilization and Average Day Rates

The following table sets forth our offshore drilling rigs by reportable segment and rigs under construction as of December 31, 2014, 2013 and 2012:

	2014	2013	2012
Floaters(1)(4)	20	26	25
Jackups(2)(4)	36	44	42
Under construction(4)(5)	7	6	6
Held for sale(1)(2)(3)	7	—	1
Total	70	76	74

⁽¹⁾  During 2014, we sold ENSCO 5000 and classified ENSCO 5001, ENSCO 5002, ENSCO 6000, ENSCO 7500 and ENSCO DS-2 as "held for sale."

⁽²⁾  During 2014, we sold ENSCO 69, Pride Wisconsin, ENSCO 85, ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98 and classified ENSCO 58 and ENSCO 90 as "held for sale."

⁽³⁾  During the first quarter of 2013, we sold Pride Pennsylvania which was classified as "held for sale" as of December 31, 2012.

⁽⁴⁾  During 2014, we accepted delivery of one ultra-premium harsh environment jackup rig (ENSCO 122). ENSCO 122 commenced a long-term drilling during the fourth quarter.

During 2013, we accepted delivery of one ultra-deepwater drillship (ENSCO DS-7) and two ultra-premium harsh environment jackup rigs (ENSCO 120 and ENSCO 121). ENSCO DS-7 commenced a long-term contract during the fourth quarter of 2013. ENSCO 120 and ENSCO 121 commenced long-term contracts during the first quarter and second quarter of 2014, respectively.    

⁽⁵⁾  During 2014, we entered into an agreement with Lamprell plc to construct two high-specification jackup rigs, ENSCO 140 and ENSCO 141, which are scheduled for delivery during the second quarter and third quarter of 2016, respectively. Both rigs remain uncontracted.

During 2013, we entered into an agreement with SHI to construct our eighth ultra-deepwater drillship (ENSCO DS-10), which is uncontracted and scheduled for delivery during the third quarter of 2015. During 2013, we also entered into agreements with KFELS to construct one premium jackup rig (ENSCO 110) and one ultra-premium harsh environment jackup rig (ENSCO 123). These rigs are scheduled for delivery during the first quarter of 2015 and second quarter of 2016, respectively. Both of these rigs are currently uncontracted.

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The following table summarizes our rig utilization and average day rates from continuing operations by reportable segment for each of the years in the three-year period ended December 31, 2014:

	2014		2013		2012
Rig Utilization(1)
Floaters	79%		84%		89%
Jackups	89%		92%		94%
Total	85%		89%		92%
Average Day Rates(2)
Floaters	$	456,023	$	435,526	$	378,325
Jackups	140,033		125,700		108,389
Total	$	242,884	$	226,703	$	189,710

⁽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 and recognized day rate revenue, including days associated with compensated downtime and mobilizations. When revenue is earned but is deferred and amortized over a future period, for example when a rig earns revenue while mobilizing to commence a new contract or while being upgraded in a shipyard, the related days are excluded from days under contract.

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, by the aggregate number of contract days, adjusted to exclude contract days associated with certain mobilizations, demobilizations, shipyard contracts and standby contracts.

Detailed explanations of our operating results, including discussions of revenues, contract drilling expense and depreciation expense by segment, are provided below.

Operating Income

Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

Segment information for each of the years in the three-year period ended December 31, 2014 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 (loss) and were included in "Reconciling Items."  Prior year information has been reclassified to conform to the current year presentation.

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Year Ended December 31, 2014

	Floaters			Jackups		Other		Operating Segments Total			Reconciling Items			Consolidated Total
Revenues	$	2,697.6		$	1,774.6	$	92.3	$	4,564.5		$	—		$	4,564.5
Operating expenses
Contract drilling   (exclusive of depreciation)	1,201.2			807.4		68.3		2,076.9			—			2,076.9
Loss on impairment	3,982.3			236.4		—		4,218.7			—			4,218.7
Depreciation	358.1			171.2		—		529.3			8.6			537.9
General and administrative	—			—		—		—			131.9			131.9
Operating (loss) income	$	(2,844.0	)	$	559.6	$	24.0	$	(2,260.4	)	$	(140.5	)	$	(2,400.9	)

Year Ended December 31, 2013

	Floaters		Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	2,659.6	$	1,588.7	$	75.1	$	4,323.4	$	—		$	4,323.4
Operating expenses
Contract drilling   (exclusive of depreciation)	1,126.0		762.6		58.5		1,947.1		—			1,947.1
Depreciation	342.2		147.5		—		489.7		6.5			496.2
General and administrative	—		—		—		—		146.8			146.8
Operating income (loss)	$	1,191.4	$	678.6	$	16.6	$	1,886.6	$	(153.3	)	$	1,733.3

Year Ended December 31, 2012

	Floaters		Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	2,149.1	$	1,406.9	$	82.8	$	3,638.8	$	—		$	3,638.8
Operating expenses
Contract drilling   (exclusive of depreciation)	894.5		687.2		61.1		1,642.8		—			1,642.8
Depreciation	283.3		151.6		—		434.9		8.9			443.8
General and administrative	—		—		—		—		148.9			148.9
Operating income (loss)	$	971.3	$	568.1	$	21.7	$	1,561.1	$	(157.8	)	$	1,403.3

Floaters

During 2014, Floater revenues increased by $38.0 million, or 1%, as compared to the prior year. The increase in revenues was primarily due to commencement of the ENSCO DS-7 drilling contract during the fourth quarter of 2013 and an increase in average day rates across our Floater fleet. These increases were partially offset by a decline in utilization attributable to certain rigs. ENSCO 5004 and ENSCO 5006 were in the shipyard for capital enhancement projects during 2014, and ENSCO 8503 incurred several months of uncontracted downtime primarily during the first quarter.

Contract drilling expense increased by $75.2 million, or 7%, as compared to the prior year, primarily due to the aforementioned addition of ENSCO DS-7 to our Floater fleet. To a lesser extent, higher personnel and repair and

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maintenance costs also contributed to the increase in contract drilling expense. These increases were partially offset by lower contract drilling expense for ENSCO 5006 and lower windstorm insurance costs during 2014 following our decision to not renew our windstorm policy for floaters in the U.S. Gulf of Mexico. Contract drilling expense during 2013 also included the aforementioned provision for doubtful accounts related to OGX receivables.

We recognized a loss on impairment of $4.0 billion during the year ended December 31, 2014 related to goodwill and three older, less capable floaters. Detailed explanations of our loss on impairment are provided below. No impairments were recorded during the prior year period.

Depreciation expense increased by $15.9 million, or 5%, primarily due to the addition of ENSCO DS-7 to our Floater fleet, partially offset by lower depreciation as a result of the impairments recorded during the second quarter of 2014.

During 2013, Floater revenues increased by $510.5 million, or 24%, as compared to the prior year. The increase in revenues was primarily due to commencement of ENSCO 8506 and ENSCO DS-6 drilling operations during the first quarter of 2013 and commencement of ENSCO 8505 drilling operations during the second quarter of 2012. To a lesser extent, the increase in revenues was attributable to an increase in average day rates for various rigs in our Floater fleet. These increases were partially offset by a decline in utilization, primarily due to ENSCO 5005, which was in the shipyard for a capital enhancement project during 2013 and downtime prompted by a vendor notice regarding inspection and replacement of connector bolts on various rigs. ENSCO 5004 drilling services provided to OGX that were not recognized as revenue also adversely impacted utilization during 2013.

Contract drilling expense increased by $231.5 million, or 26%, as compared to the prior year, primarily due to the additions to our Floater fleet and increased personnel costs. These increases were partially offset by lower contract drilling expense for ENSCO 5005, which was in the shipyard for a capital enhancement project during 2013. The prior year also included the favorable settlement of third-party claims which reduced contract drilling expense by $63.3 million. Depreciation expense increased by $58.9 million, or 21%, primarily due to the aforementioned additions to our Floater fleet.

Jackups

During 2014, Jackup revenues increased by $185.9 million, or 12%, as compared to the prior year. The increase in revenues was primarily due to an increase in average day rates across our Jackup fleet and commencement of the ENSCO 120, ENSCO 121 and ENSCO 122 drilling contracts. These increases were partially offset by a decline in utilization for certain rigs in the Jackup fleet.

Contract drilling expense increased by $44.8 million, or 6%, as compared to the prior year, primarily due to the aforementioned additions to our Jackup fleet and an increase in personnel and repair and maintenance costs.

We recognized a loss on impairment of $236.4 million during the year ended December 31, 2014 related to ten jackups. Detailed explanations of our loss on impairment are provided below. No impairments were recorded during the prior year period.

Depreciation expense increased by $23.7 million, or 16%, primarily due to the additions to our Jackup fleet.

During 2013, Jackup revenues increased by $181.8 million, or 13%, as compared to the prior year.  The increase in revenues was primarily due to an increase in average day rates, mostly attributable to the U.S. Gulf of Mexico, North Sea and Southeast Asia. Contract drilling expense increased by $75.4 million, or 11%, as compared to the prior year, primarily due to increased personnel costs.

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Impairment of Long-Lived Assets

During 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2,463.1 million, of which $1,220.8 million was included in (loss) income from continuing operations and $1,242.3 million was included in (loss) income from discontinued operations, net in our consolidated statement of operations. These losses were recorded during the second and fourth quarters.

During the second quarter, demand for floaters deteriorated as a result of continued reductions in capital spending by operators in addition to delays in operators’ drilling programs. The reduction in demand, combined with the increasing supply from newbuild floater deliveries, led to a very competitive market. In general, contracting activity declined significantly, and day rates and utilization came under pressure, especially for older, less capable floaters.

In response to the adverse change in the floaters business climate, management evaluated our older, less capable floaters and committed to a plan to sell five rigs. ENSCO 5000, ENSCO 5001, ENSCO 5002, ENSCO 6000 and ENSCO 7500 were removed from our portfolio of rigs marketed for contract drilling services and actively marketed for sale. These rigs were written down to fair value, less costs to sell. We completed the sale of ENSCO 5000 in December 2014. The remaining four floaters were classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

We measured the fair value of the "held for sale" rigs by applying a market approach, which was based on unobservable third-party estimated prices that would be received in exchange for the assets in an orderly transaction between market participants. We recorded a pre-tax, non-cash loss on impairment totaling $546.4 million during the second quarter associated with our "held for sale" rigs. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014.

During the fourth quarter, Brent crude oil prices declined from approximately $95 per barrel to near $55 per barrel on December 31, 2014. These declines resulted in further reductions in capital spending by operators, including the cancellation or deferral of planned drilling programs. As a result, day rates and utilization came under further pressure, especially for older, less capable rigs. The significant supply and demand imbalance will continue to be adversely impacted by future newbuild deliveries, program delays and lower capital spending by operators.

In response to the adverse change in business climate, management evaluated our aged rigs and committed to a plan to sell one additional floater and two jackups. ENSCO DS-2, ENSCO 58 and ENSCO 90 were removed from our portfolio of rigs marketed for contract drilling services. These rigs were written down to fair value, less costs to sell, during the fourth quarter and classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

As of December 31, 2014, we measured the fair value of our seven "held for sale" rigs by applying a market approach, which was based on unobservable third-party estimated prices that would be received in exchange for the assets in an orderly transaction between market participants. In addition to the asset impairment recorded during the second quarter, we recorded an additional pre-tax, non-cash loss on impairment totaling $407.9 million during the fourth quarter. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014. See "Note 10 - Discontinued Operations" for additional information on our "held for sale" rigs.

On a quarterly basis, we evaluate the carrying value of our property and equipment to identify events or changes in circumstances ("triggering events") that indicate the carrying value may not be recoverable. During the second quarter, as a result of the adverse change in the floater business climate, management's decision to sell five floaters and the impairment charge incurred on the "held for sale" floaters, management concluded that a triggering event had occurred and performed an asset impairment analysis on our remaining older, less capable floaters.

Based on the analysis performed as of May 31, 2014, we recorded an additional pre-tax, non-cash loss on impairment with respect to four other floaters totaling $991.5 million, of which $288.0 million related to ENSCO DS-2 which was removed from our portfolio of rigs marketed for contract drilling services during the fourth quarter. The ENSCO DS-2 impairment charge was reclassified to (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014. The remaining $703.5 million impairment charge was

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included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014. We measured the fair value of these rigs by applying an income approach, using projected discounted cash flows. These valuations were based on unobservable inputs that require significant judgments for which there is limited information, including assumptions regarding future day rates, utilization, operating costs and capital requirements.

During the fourth quarter, as a result of the decline in commodity prices and adverse changes in the offshore drilling market, management's decision to sell an additional floater and two jackups and the impairment charge incurred on the "held for sale" rigs, management concluded that a triggering event had occurred and performed an asset impairment analysis for all floaters and jackups.

Based on the analysis performed as of December 31, 2014, we recorded an additional pre-tax, non-cash loss on impairment with respect to two older, less capable floaters and ten older, less capable jackups totaling $517.3 million. The impairment charge was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014. We measured the fair value of these rigs by applying either an income approach, using projected discounted cash flows, or a market approach. These valuations were based on unobservable inputs that require significant judgments for which there is limited information, including assumptions regarding future day rates, utilization, operating costs and capital requirements.  

Impairment of Goodwill

Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

We test goodwill for impairment on an annual basis or when events or changes in circumstances indicate that a potential impairment exists.  During the second quarter, demand for floaters deteriorated as a result of a continued reduction in capital spending by operators in addition to announced delays in operators’ drilling programs. The reduction in demand, combined with increasing supply from newbuild floater deliveries, led to a very competitive market. In general, contracting activity for floaters declined significantly and day rates and utilization came under pressure, especially for older, less capable floaters.

Management considered the adverse change in the floater business climate, the commitment to a plan to sell five floaters in May 2014, and the impairment charge on the "held for sale" floaters during the second quarter and concluded that a triggering event had occurred. We performed an interim goodwill impairment test to evaluate the recoverability of the Floaters reporting unit goodwill balance of $3.1 billion as of May 31, 2014. Based on the valuation performed, the Floaters reporting unit estimated fair value exceeded the carrying value by approximately 7%; therefore, we concluded that the goodwill balance was not impaired.  

As part of our annual goodwill impairment test as of December 31, 2014, we considered the significant decline in commodity prices during the fourth quarter of 2014. Specifically, Brent crude oil prices declined from approximately $95 per barrel at September 30, 2014 to near $55 per barrel at December 31, 2014. These declines resulted in further reductions in capital spending by operators, including the cancellation or deferral of planned drilling programs. We expect that this reduction in demand will cause further deterioration in day rates and utilization and that current market dynamics will create a challenging contracting environment into 2016.

Our stock price also declined significantly during the latter half of 2014, reaching a five-year low of $25.88 on December 16th. Our stock price traded between $25.88 and $41.99 during the fourth quarter of 2014 and averaged $35.23 during this period.

Management considered the adverse changes in the current floater business climate, the sustained decline in stock price and the impairment charge on older, less capable floaters during the fourth quarter and concluded it was more-likely-than-not that the fair value of the Floater reporting unit was less than its carrying amount. As a result, we estimated the fair value of the reporting unit using a blended income and market approach. Based on the valuation performed as of December 31, 2014, the reporting unit estimated fair value was less than the carrying value; therefore, we concluded that the Floater goodwill balance was impaired.  We compared the estimated fair value of the reporting

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unit to the fair value of all assets and liabilities of the reporting unit to calculate the implied fair value of goodwill. As a result, we recorded a non-cash loss on impairment totaling $3.0 billion which was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014.

The income approach was based on a discounted cash flow model, which utilized present values of cash flows to estimate fair value. The future cash flows were projected based on our estimates of future day rates, utilization, operating costs, capital requirements, growth rates and terminal values. Forecasted day rates and utilization take into account current market conditions and our anticipated business outlook, both of which have been impacted by the adverse changes in the floater business environment during 2014. The day rates reflected contracted rates during the respective contracted periods and management's estimate of market day rates in uncontracted periods. The forecasted market day rates were held constant in the near-term but were forecasted to grow in the longer-term and terminal period.

Operating costs were forecasted using a combination of our historical average operating costs and expected future costs, adjusted for an estimated inflation factor. Capital requirements in the discounted cash flow model were based on management's estimates of future capital costs, taking into consideration our historical trends. The estimated capital requirements included cash outflows for new rig construction, rig enhancements and minor upgrades and improvements.

A terminal period was used to reflect our estimate of stable, perpetual growth. The terminal period reflects a terminal growth rate of 3.0%, which includes an estimated inflation factor. The future cash flows were discounted using a market-participant risk-adjusted weighted average cost of capital ("WACC") of 11.0%. These assumptions were derived from unobservable inputs and reflect management's judgments and assumptions.

The market approach was based upon the application of price-to-earnings multiples to management's estimates of future earnings adjusted for a control premium. The price-to-earnings multiples used in the market valuation ranged from 6.0x to 6.8x and were based on market participant multiples. Management's earnings estimates were derived from unobservable inputs that require significant estimates, judgments and assumptions as described in the income approach.

The estimated fair value of the Floaters reporting unit determined under the income approach was consistent with the estimated fair value determined under the market approach. For purposes of the goodwill impairment test, we calculated the Floaters reporting unit estimated fair value as the average of the values calculated under the income approach and the market approach.

We evaluated the estimated fair value of our reporting units compared to our market capitalization as of December 31, 2014. To perform this assessment, we used a market approach to estimate the fair value of the Jackups reporting unit. The aggregate fair values of our reporting units exceeded our market capitalization, and we believe the resulting implied control premium was reasonable based on recent market transactions within our industry or other relevant benchmark data.

We performed a qualitative assessment for our Jackup reporting unit as of December 31, 2014. Goodwill impairment tests performed during prior years indicated that the fair value of the Jackup reporting unit significantly exceeded its carrying amount. Despite the adverse changes in the offshore drilling climate, we concluded that the fair value remains substantially in excess of the carrying value of the reporting unit, as evidenced by the estimated fair value of the Jackup reporting unit calculated for the purpose of reconciling the fair value of our reporting units to our market capitalization. Therefore, we concluded that it remains more-likely-than-not that the Jackup reporting unit was not impaired.

The estimates used to determine the fair value of the Floaters reporting unit reflect management's best estimates, and we believe they are reasonable. Future declines in the Floaters reporting unit's operating performance or our anticipated business outlook may reduce the estimated fair value of our Floaters reporting unit and result in additional impairments. Factors that could have a negative impact on the fair value of the Floaters reporting unit include, but are not limited to:

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• decreases in estimated market day rates and utilization due to greater-than-expected market pressures, downtime and other risks associated with offshore rig operations;

• sustained declines in our stock price;

• decreases in revenue due to our inability to attract and retain skilled personnel;

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

• 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;

• possible cancellation or suspension of drilling contracts as a result of mechanical difficulties, performance or other reasons;

• delays in contract commencement dates;

• the outcome of litigation, legal proceedings, investigations or other claims or contract disputes resulting in significant cash outflows;

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

• increases in the market-participant risk-adjusted WACC;

• declines in anticipated growth rates.

Adverse changes in one or more of these factors could result in additional goodwill impairments in future periods. As of December 31, 2014, there was $192.6 million of goodwill associated with our Jackup reporting unit and $83.5 million of goodwill associated with our Floater reporting unit on our consolidated balance sheet.

Other Income (Expense), Net

The following table summarizes other income (expense), net, for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Interest income	$	13.0		$	16.6		$	22.8
Interest expense, net:
Interest expense	(239.6		)	(226.5		)	(229.4		)
Capitalized interest	78.2			67.7			105.8
	(161.4		)	(158.8		)	(123.6		)
Other, net	.5			42.1			2.2
	$	(147.9	)	$	(100.1	)	$	(98.6	)

During 2014 and 2013, interest income declined as compared to the respective prior year periods primarily due to declining outstanding principal amounts for reimbursement of mobilization and upgrade costs on certain long-term drilling contracts due from customers.

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Interest expense during 2014 increased$13.1 million. or 6%, as compared to the prior year. The increase was due to the $1.25 billion debt offering completed on September 29, 2014. During 2013, interest expense was comparable with the respective prior year period as the average outstanding principal balances associated with our long-term debt instruments remained consistent.

Interest expense capitalized during 2014increased$10.5 million, or 16%, as compared to the prior year due to an increase in the average outstanding amount of capital invested in newbuild construction. During 2013, interest expense capitalized declined$38.1 million, or 36%, as compared to prior year due to a decline in the average outstanding amount of capital invested in newbuild construction. ENSCO 8506 and ENSCO DS-6 were placed into service during the first quarter of 2013, and ENSCO 8505 was placed into service during the second quarter of 2012.

During 2013, we received a $30.6 million reimbursement from the Mexican tax authority with respect to the tax authority's draw on letters of credit issued by an Ensco subsidiary for the benefit of Seahawk Drilling Inc. ("Seahawk") under a credit support agreement executed in connection with the 2009 spin-off of Seahawk. The reimbursement was included in other, net in our consolidated statement of operations for the year ended December 31, 2013.

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 gains and losses, inclusive of offsetting fair value derivatives, were $2.6 million of losses, $6.4 million of gains and $3.5 million of losses, and were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.

Net unrealized gains of $2.3 million, $6.2 million and $2.8 million from marketable securities held in our supplemental executive retirement plans ("SERP") were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively. The fair value measurement of our marketable securities held in the SERP is discussed in Note 2 to our consolidated financial statements.

Provision for Income Taxes

Ensco plc, our parent company, is domiciled and resident in the U.K. Our subsidiaries conduct operations and earn income in numerous countries and are subject to the laws of taxing jurisdictions within those countries. The income of our non-U.K. subsidiaries is not subject to U.K. taxation. 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 frequent changes in the taxing jurisdictions in which our drilling rigs are operated and/or owned, changes in the overall level of our income and changes in tax laws, our consolidated effective income tax rate may vary substantially from one reporting period to another.

Income tax expense was $140.5 million, $203.1 million and $228.6 million, and our consolidated effective income tax rate was (5.5)%, 12.4% and 17.5% during the years ended December 31, 2014, 2013 and 2012, respectively. Our consolidated effective income tax rate for 2014 includes the impact of various discrete tax items, including the recognition of a net $18.4 million tax expense associated with liabilities for unrecognized tax benefits and other adjustments relating to prior years and a $16.4 million tax benefit associated with rig impairments. In addition, we recognized a net $41.4 million tax benefit in connection with the utilization of foreign tax credits that were previously subject to a valuation allowance.

The majority of discrete tax expense recognized during 2013 was attributable to the recognition of a $7.4 million liability for taxes associated with a $30.6 million reimbursement from the resolution of a dispute with the

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Mexican tax authority and a $7.0 million increase in the valuation allowance on U.S. foreign tax credits resulting from a restructuring transaction.

The majority of discrete tax expense recognized during 2012 was attributable to $51.2 million of income tax expense associated with the restructuring of certain subsidiaries of Pride, and tax expense associated with liabilities for unrecognized tax benefits and other adjustments relating to prior years.

Excluding the impact of the aforementioned tax items and goodwill and asset impairments, our consolidated effective income tax rates for the years ended December 31, 2014, 2013 and 2012 were 10.7%, 12.2% and 12.4%, respectively. The changes in our consolidated effective income tax rate excluding discrete tax items during the three years result primarily from changes in the relative components of our earnings from the various taxing jurisdictions in which our drilling rigs are operated and/or owned and differences in the tax rates in such jurisdictions.

Discontinued Operations

Our business strategy has been to focus on ultra-deepwater floater and premium jackup operations and de-emphasize other assets and operations considered to be non-core or that do not meet our standards for financial performance. Consistent with this strategy, we sold the following rigs during the three-year period ended December 31, 2014. These rigs are classified as discontinued operations (in millions):

Rig(3)	Date of Rig Sale	Segment(1)	Net Proceeds		Net Book Value(2)		Pre-tax Gain/(Loss)
ENSCO 5000	December 2014	Floaters	$	1.3	$	.5	$	.8
ENSCO 93	September 2014	Jackups	51.7		52.9		(1.2		)
ENSCO 85	April 2014	Jackups	64.4		54.1		10.3
ENSCO 69 & Pride Wisconsin	January 2014	Jackups	32.2		8.6		23.6
Pride Pennsylvania	March 2013	Jackups	15.5		15.7		(.2		)
ENSCO 5003	December 2012	Floaters	68.2		89.4		(21.2		)
Pride Hawaii	October 2012	Jackups	18.8		16.8		2.0
ENSCO I	September 2012	Other	4.5		12.3		(7.8		)
ENSCO 61	June 2012	Jackups	31.7		19.6		12.1
ENSCO 59	May 2012	Jackups	22.8		21.9		.9
			$	311.1	$	291.8	$	19.3

⁽¹⁾ The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and previously were included within the operating segment noted in the above table.

⁽²⁾ Includes the rig's net book value as well as inventory and other assets on the date of the sale.

⁽³⁾ In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which are contracted to Pemex. As described below, the loss on sale and operating results of ENSCO 93 were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

During 2014, management committed to a plan to sell six floaters and two jackups. ENSCO 5000, ENSCO 5001, ENSCO 5002, ENSCO 6000, ENSCO 7500, ENSCO DS-2, ENSCO 58 and ENSCO 90 were removed from our portfolio of rigs marketed for contract drilling services. These rigs were written down to fair value, less costs to sell. We recorded a non-cash loss on impairment totaling $1.2 billion, net of tax benefits of $83.5 million, during the year ended December 31, 2014. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014.

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We completed the sale of ENSCO 5000 for net proceeds of $1.3 million in December 2014. The remaining five floaters and two jackups are being actively marketed for sale and were classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

The operating results from these rigs were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

During 2014, we sold ENSCO 93, a jackup contracted to Pemex. In connection with this sale, we executed a charter agreement with the purchaser to continue operating the rig for the remainder of the Pemex contract, which had an anticipated completion date in late 2015. Based on market developments during the fourth quarter, we now expect that the ENSCO 93 charter agreement will terminate prior to September 30, 2015. As a result, the loss on sale of $1.2 million and ENSCO 93 operating results were reclassified to (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014. Net proceeds from the sale of $51.7 million were included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2014. See "Note 12 - Sale-leaseback" for additional information.

During 2014, we sold ENSCO 85 for net proceeds of $64.4 million and ENSCO 69 and Pride Wisconsin for net proceeds of $32.2 million. The operating results of these rigs were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014. The net proceeds from the sale for ENSCO 69 and Pride Wisconsin were received in December 2013 and included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2013.

During 2012, we classified jackup rig Pride Pennsylvania as held for sale, and the rig was written down to fair value less estimated cost to sell. We recognized a $2.5 million loss for assets classified as held for sale during the year ended December 31, 2012.

The following table summarizes (loss) income from discontinued operations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Revenues	$	325.0		$	596.4		$	668.6
Operating expenses	372.0			577.6			544.3
Operating (loss) income	(47.0		)	18.8			124.3
Other income	—			.3			1.3
Income tax expense	(30.7		)	(20.2		)	(8.5		)
Loss on impairment, net	(1,158.8		)	—			—
Gain (loss) on disposal of discontinued operations, net	37.3			(1.1		)	(16.5		)
(Loss) income from discontinued operations	$	(1,199.2	)	$	(2.2	)	$	100.6

Debt and interest expense are not allocated to our discontinued operations.

During 2008, ENSCO 74 was lost as a result of Hurricane Ike in the U.S. Gulf of Mexico. The owner of a pipeline filed claims alleging that ENSCO 74 caused the pipeline to rupture during Hurricane Ike. We incurred $3.6 million in professional fees in connection with this matter, which we applied against our $10.0 million per occurrence deductible under our liability insurance policy.

In February 2014, we reached an agreement with the owner of the pipeline to settle the claims for $9.6 million. Accordingly, we recorded a $6.4 million charge for our remaining obligation under our liability insurance policy in loss from discontinued operations in our consolidated statement of operations for the year ended December 31, 2013.

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The remaining $3.2 million was settled by our underwriters. See "Note 11 - Commitments and Contingencies" for additional information on the ENSCO 74 loss.

LIQUIDITY AND CAPITAL RESOURCES

Although our business is cyclical, we have historically relied on our cash flow from continuing 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 through newbuild construction and upgrade projects and the return of capital to shareholders through dividend payments.

Given recent market conditions, our Board of Directors elected to reduce the quarterly dividend payment in order to increase the Company's capital flexibility. We expect cash flow generated during 2015 will primarily be used to fund capital expenditures, most notably milestone payments for newbuild rigs. Based on our balance sheet and contractual backlog of $9.7 billion, we believe future capital projects, debt service and dividend payments will primarily be funded from cash and cash equivalents, future operating cash flows and borrowings under our commercial paper program and/or revolving credit facility. We may decide to access debt and/or equity markets to raise additional capital, refinance existing debt or increase liquidity as necessary.

During the three-year period ended December 31, 2014, our primary sources of cash were an aggregate $5.8 billion generated from operating activities of continuing operations, $1.2 billion in proceeds from the issuance of senior notes and $178.4 million in proceeds from rig sales.  Our primary uses of cash during the same period included $5.0 billion for the construction, enhancement and other improvement of our drilling rigs, including $3.3 billion invested in newbuild construction, and $1.6 billion for dividend payments.

Detailed explanations of our liquidity and capital resources for each of the years in the three-year period ended December 31, 2014 are set forth below.

Cash Flows and Capital Expenditures

Our cash flows from operating activities of continuing operations and capital expenditures on continuing operations for each of the years in the three-year period ended December 31, 2014 were as follows (in millions):

	2014		2013		2012
Cash flows from operating activities of continuing operations	$	2,057.9	$	1,811.2	$	1,954.6
Capital expenditures on continuing operations:
New rig construction	$	699.5	$	1,282.5	$	1,298.3
Rig enhancements	537.4		239.0		216.5
Minor upgrades and improvements	331.9		242.0		198.4
	$	1,568.8	$	1,763.5	$	1,713.2

During 2014, cash flows from continuing operations increased by $246.7 million, or 14%, as compared to the prior year.  The increase primarily resulted from a $503.1 million increase in cash receipts from contract drilling services, partially offset by a $259.2 million increase in cash payments related to contract drilling expenses.

Cash receipts from contract drilling services associated with customer reimbursed capital upgrades and mobilizations which are amortized to revenue over the term of the related contract totaled $267.0 million for the year ended December 31, 2014 as compared to $70.0 million for the year ended December 31, 2013.

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During 2013, cash flows from continuing operations declined by $143.4 million, or 7%, as compared to the prior year.  The decrease primarily resulted from a $348.7 million increase in cash payments related to contract drilling expenses, a $117.5 million increase in cash payments for income taxes, a $40.2 million increase in cash payments for interest and a $28.8 million increase in cash payments related to general and administrative expenses, partially offset by a $378.8 million increase in cash receipts from contract drilling services.

Cash payments during 2013 related to contract drilling and general and administrative expenses were generally higher than the prior year due in part to the full year impact of the Pride acquisition on certain annual payments made during 2013. Annual payments made during the year ended December 31, 2012 were based on seven months of acquired company operating activity.

Cash receipts from contract drilling services associated with customer reimbursed capital upgrades and mobilizations which are amortized to revenue over the term of the related contract totaled $70.0 million for the year ended December 31, 2013 as compared to $260.0 million for the year ended December 31, 2012.

We remain focused on our long-established strategy of high-grading and expanding the size of our fleet. During the three-year period ended December 31, 2014, we invested $3.3 billion in the construction of new drilling rigs and an additional $992.9 million enhancing the capability and extending the useful lives of our existing fleet.

Given recent market conditions, our Board of Directors elected to reduce the quarterly dividend payment in order to increase the Company's capital flexibility. We expect cash flow generated during 2015 will primarily be used to fund capital expenditures, most notably milestone payments for newbuild rigs. Based on our balance sheet and contractual backlog of $9.7 billion, we believe future capital projects, debt service and dividend payments will primarily be funded from cash and cash equivalents, future operating cash flows and borrowings under our commercial paper program and/or revolving credit facility. We may decide to access debt and/or equity markets to raise additional capital, refinance existing debt or increase liquidity as necessary.

Based on our current projections, we expect capital expenditures during 2015 to include approximately $1.6 billion for newbuild construction, approximately $250.0 million for rig enhancement projects and approximately $250.0 million for minor upgrades and improvements.  Depending on market conditions and opportunities, we may make additional capital expenditures to upgrade rigs for customer requirements and construct or acquire additional rigs.

Financing and Capital Resources

Our total debt, total capital and total debt to total capital ratios as of December 31, 2014, 2013 and 2012 are summarized below (in millions, except percentages):

	2014			2013			2012
Total debt	$	5,920.4		$	4,766.4		$	4,845.9
Total capital*	14,135.4			17,558.0			16,692.3
Total debt to total capital	41.9		%	27.1		%	29.0		%

^* Total capital includes total debt plus Ensco shareholders' equity.

During 2014, our total capital declined $3.4 billion and our total debt to total capital ratio increased 14.8% to 41.9% primarily due to a pre-tax, non-cash loss on impairment of $5.5 billion.

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 Senior Notes

On September 29, 2014, we issued $625.0 million aggregate principal amount of unsecured 4.50% notes due 2024 at a discount of $850,000 and $625.0 million aggregate principal amount of unsecured 5.75% notes due 2044 (collectively the “2014 Notes”) at a discount of $2.8 million in a public offering. Interest on these notes is payable semiannually in April and October of each year commencing April 1, 2015.  The 2014 Notes were issued pursuant to an Indenture between us and Deutsche Bank Trust Company Americas, as trustee (the “Trustee”), dated March 17, 2011 (the "Indenture") and a Second Supplemental Indenture between us and the Trustee, dated September 29, 2014. The net proceeds from the sale of the 2014 Notes are being used for general corporate purposes. 

During 2011, we issued $1.0 billion aggregate principal amount of unsecured 3.25% notes due 2016 at a discount of $7.6 million and $1.5 billion aggregate principal amount of unsecured 4.70% notes due 2021 (collectively the “2011 Notes”) at a discount of $29.6 million in a public offering. Interest on these notes is payable semiannually in March and September of each year.  The 2011 Notes were issued pursuant to the Indenture, and a supplemental indenture between us and the Trustee, dated March 17, 2011. The net proceeds from the sale of the 2011 Notes were used to fund a portion of the cash consideration payable in connection with the Pride acquisition.

Upon consummation of the Pride acquisition during 2011, we assumed the acquired company's outstanding debt comprised of $900.0 million aggregate principal amount of 6.875% senior notes due 2020, $500.0 million aggregate principal amount of 8.5% senior notes due 2019 and $300.0 million aggregate principal amount of 7.875% senior notes due 2040 (the "Acquired Notes").  Under a supplemental indenture, Ensco plc has fully and unconditionally guaranteed the performance of all Pride obligations with respect to the Acquired Notes.  See "Note 15 - Guarantee of Registered Securities" for additional information on the guarantee of the Acquired Notes. 

We may redeem each series of the 2014 Notes in whole, at any time or in part from time to time, prior to maturity. If we elect to redeem the 2014 Notes due 2024 before the date that is three months prior to the maturity date or the 2014 Notes due 2044 before the date that is six months prior to the maturity date, we will pay an amount equal to 100% of the principal amount of the notes redeemed plus accrued and unpaid interest and a "make-whole" premium. If we elect to redeem the 2014 Notes on or after the aforementioned dates, we will pay an amount equal to 100% of the principal amount of the notes redeemed plus accrued and unpaid interest but we are not required to pay a "make-whole" premium. We may redeem each series of the 2011 Notes and the Acquired Notes, in whole or in part, at any time, at a price equal to 100% of their principal amount, plus accrued and unpaid interest and a "make-whole" premium.

The indentures governing the 2014 Notes, the 2011 Notes and the Acquired Notes contain customary events of default, including failure to pay principal or interest on such Notes when due, among others. The indentures governing the 2014 Notes, the 2011 Notes and the Acquired Notes also contain certain restrictions, including, among others, restrictions on our ability and the ability of our subsidiaries to create or incur secured indebtedness, enter into certain sale/leaseback transactions and enter into certain merger or consolidation transactions.

Debentures Due 2027

During 1997, Ensco Delaware issued $150.0 million of unsecured 7.20% Debentures due November 15, 2027 (the "Debentures") in a public offering. Interest on the Debentures is payable semiannually in May and November. We may redeem the Debentures, in whole or in part, at any time prior to maturity, at a price equal to 100% of their principal amount, plus accrued and unpaid interest and a "make-whole" premium. The Debentures are not subject to any sinking fund requirements. During 2009, in connection with the redomestication, Ensco plc entered into a supplemental indenture to unconditionally guarantee the principal and interest payments on the Debentures.

The Debentures and the indenture and the supplemental indentures pursuant to which the Debentures were issued also contain customary events of default, including failure to pay principal or interest on the Debentures when due, among others. The indenture and the supplemental indentures contain certain restrictions, including, among others, restrictions on our ability and the ability of our subsidiaries to create or incur secured indebtedness, enter into certain sale/leaseback transactions and enter into certain merger or consolidation transactions.

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MARAD Bonds Due 2016 and 2020

During 2001, a subsidiary of Ensco Delaware issued $190.0 million of 15-year bonds which are guaranteed by MARAD to provide long-term financing for ENSCO 7500. In December 2014, we fully redeemed the remaining outstanding principal of these bonds and incurred a "make-whole" payment of $600,000, and MARAD released its interests in ENSCO 7500.

During 2003, a subsidiary of Ensco Delaware issued $76.5 million of 17-year bonds which are guaranteed by MARAD to provide long-term financing for ENSCO 105. The bonds will be repaid in 34 equal semiannual principal installments of $2.3 million ending in October 2020. Interest on the bonds is payable semiannually, in April and October, at a fixed rate of 4.65%.

Ensco Delaware issued separate guaranties to MARAD, guaranteeing the performance of obligations under the bonds.  During 2010, the documents governing MARAD's guarantee commitments were amended to address certain changes arising from the redomestication and to include Ensco plc as an additional guarantor of the debt obligations of Ensco Delaware and its subsidiaries.

Upon consummation of the Pride acquisition, we assumed $151.5 million of MARAD bonds issued to provide long-term financing for ENSCO 6003 and ENSCO 6004. The bonds are guaranteed by MARAD and will be repaid in semiannual principal installments ending in 2016. Interest on the bonds is payable semiannually at a weighted average fixed rate of 4.33%.

We may redeem each series of our outstanding MARAD bonds, in whole or in part, on any interest payment date, at a price equal to 100% of the their principal amount, plus accrued and unpaid interest and a “make-whole” premium.

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. During 2014, we increased the size of our program to permit the issuance of commercial paper notes in an aggregate principal amount not to exceed $2.25 billion at any time outstanding. Amounts issued under the commercial paper program are supported by the available and unused committed capacity under our credit facility. As a result, amounts issued under the commercial paper program are limited by the amount of our available and unused committed capacity under our credit facility. The proceeds of such financings may be used for capital expenditures and other general corporate purposes. The commercial paper bears interest at rates that vary based on market conditions and the ratings assigned by credit rating agencies at the time of issuance. The weighted-average interest rate on our commercial paper borrowings was 0.26% and 0.35% during 2014 and 2013, respectively.  Commercial paper maturities will vary but may not exceed 364 days from the date of issue. The commercial paper is not redeemable or subject to voluntary prepayment by us prior to maturity.  We had no amounts outstanding under our commercial paper program as of December 31, 2014 and 2013.

Revolving Credit Facility

On September 30, 2014, we entered into an amendment to the Fourth Amended and Restated Credit Agreement (the "Five-Year Credit Facility"), among Ensco, Citibank, N.A., as Administrative Agent, DNB Bank ASA, as Syndication Agent, and a syndicate of banks. This amendment extended the Five-Year Credit Facility maturity date from May 7, 2018 to September 30, 2019 and increased the total commitment of the lenders from $2.0 billion to $2.25 billion. As amended, the Five-Year Credit Facility provides for a $2.25 billion senior unsecured revolving credit facility to be used for general corporate purposes.

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Advances under the Five-Year Credit Facility bear interest at Base Rate or LIBOR plus an applicable margin rate (currently 0.125% per annum for Base Rate advances and 1.125% per annum for LIBOR advances) depending on our credit rating. Amounts repaid may be re-borrowed during the term of the Five-Year Credit Facility. We are required to pay a quarterly commitment fee (currently 0.125% per annum) on the undrawn portion of the $2.25 billion commitment which is also based on our credit rating. In addition to other customary restrictive covenants, the Five-Year Credit Facility requires us to maintain a total debt to total capitalization ratio of less than or equal to 50%. We have the right, subject to receipt of commitments from new or existing lenders, to increase the commitments under the Five-Year Credit Facility to an aggregate amount of up to $2.75 billion. We had no amounts outstanding under the Five-Year Credit Facility as of December 31, 2014 and 2013.

Other Financing

     We filed an automatically effective shelf registration statement on Form S-3 with the U.S. Securities and Exchange Commission ("SEC") on January 15, 2015, which provides us the ability to issue debt securities, equity securities, guarantees and/or units of securities in one or more offerings. The registration statement, as amended, expires in January 2018.

In May 2013, our shareholders approved a new share repurchase program. Subject to certain provisions under English law, including the requirement of Ensco plc to have sufficient distributable reserves, we may purchase shares up to a maximum of $2.0 billion in the aggregate under the program, but in no case more than 35.0 million shares. The program terminates in May 2018.

In June 2014, we completed a capital reorganization under UK law (the “Capital Reorganization”), that provides the Company with greater flexibility going forward to return capital to shareholders in the form of dividends and share repurchases. The Capital Reorganization, which was authorized by our Board of Directors and approved by our shareholders at the Annual General Meeting in May 2014, was achieved through the issuance and subsequent cancellation of $3.0 billion of a newly-created class of shares (the “Capital Reorganization Shares”).

The Capital Reorganization Shares had no substantive economic or voting rights and were issued to a subsidiary of the Company on June 17, 2014 for the benefit of existing shareholders solely for the purpose of the Capital Reorganization transaction. Upon cancellation of the shares on June 18, 2014, $3.0 billion of the shareholders' equity of Ensco plc that was previously deemed non-distributable under UK law is now included in distributable reserves.

The Capital Reorganization did not involve any distribution or repayment of capital nor did it have an impact on the underlying net assets of the Company. There was no net impact on our shareholders’ equity for any period as a result of the Capital Reorganization.

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Contractual Obligations

We have various contractual commitments related to our new rig construction and rig enhancement agreements, long-term debt and operating leases. We expect to fund these commitments from existing cash and short-term investments, future operating cash flows and borrowings under our commercial paper program and/or revolving credit facility.  The actual timing of our new rig construction and rig enhancement payments may vary based on the completion of various milestones which are beyond our control.  The following table summarizes our significant contractual obligations as of December 31, 2014 and the periods in which such obligations are due (in millions):

	Payments due by period
	2015		2016 and        2017		2018 and       2019		Thereafter		Total
New rig construction agreements	$	1,353.5	$	373.8	$	—	$	—	$	1,727.3
Principal payments on long-term debt	34.8		1,024.2		509.0		4,104.5		5,672.5
Interest payments on long-term debt	309.1		565.1		526.4		1,771.1		3,171.7
Operating leases	77.3		48.0		20.8		55.0		201.1
Rig enhancement agreements	42.8		—		—		—		42.8
Total contractual obligations(1)	$	1,817.5	$	2,011.1	$	1,056.2	$	5,930.6	$	10,815.4

⁽¹⁾  Contractual obligations do not include $160.9 million of unrecognized tax benefits, inclusive of interest and penalties, included on our consolidated balance sheet as of December 31, 2014.  We are unable to specify with certainty the future periods in which we may be obligated to settle such amounts.

Contractual obligations do not include foreign currency forward contracts ("derivatives"). As of December 31, 2014, we had derivatives outstanding to exchange an aggregate $580.6 million U.S. dollars for various foreign currencies.  As of December 31, 2014, our consolidated balance sheet included net derivative liabilities of $26.3 million.  All of our outstanding derivatives mature during the next 18 months.

a

Other Commitments

We have other commitments that we are contractually obligated to fulfill with cash under certain circumstances.  These commitments include letters of credit to guarantee our performance as it relates to our drilling contracts, contract bidding, customs duties, tax appeals and other obligations in various jurisdictions. Obligations under these letters of credit are not normally called, as we typically comply with the underlying performance requirement. As of December 31, 2014, we had not been required to make collateral deposits with respect to these agreements. The following table summarizes our other commitments as of December 31, 2014 (in millions):

	Commitment expiration by period
	2015		2016 and        2017		2018 and       2019		Thereafter		Total
Letters of Credit	$	80.5	$	47.0	$	136.2	$	.2	$	263.9

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Liquidity

Our liquidity position as of December 31, 2014, 2013 and 2012 is summarized below (in millions, except ratios):

	2014		2013		2012
Cash and cash equivalents	$	664.8	$	165.6	$	487.1
Short-term investments	757.3		50.0		50.0
Working capital	1,830.2		487.9		734.2
Current ratio	2.7		1.5		1.7

We expect to fund our short-term liquidity needs, including contractual obligations and anticipated capital expenditures, as well as dividends or working capital requirements, from our cash and cash equivalents, short-term investments, operating cash flows, funds borrowed under our commercial paper program and, if necessary, funds borrowed under our revolving credit facility.

We expect to fund our long-term liquidity needs, including contractual obligations, anticipated capital expenditures and dividends from our operating cash flows and, if necessary, funds borrowed under our revolving 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 ("GHG") emissions have increasingly become the subject of international, national, regional, state and local attention. During 2009, the United States Environmental Protection Agency (the "EPA") officially published its findings that emissions of carbon dioxide, methane and other GHGs present an endangerment to human health and the environment because emissions of such gases are, according to the EPA, contributing to warming of the earth's atmosphere and other climatic changes. These EPA findings allowed the agency to proceed with the adoption and implementation of regulations to restrict GHG emissions under existing provisions of the Clean Air Act that establish Prevention of Significant Deterioration ("PSD") construction and Title V operating permit reviews for certain large stationary sources that are potential major sources of GHG emissions. Facilities required to obtain PSD permits for their GHG emissions also will be required to meet "best available control technology" standards to be established by the states or, in some cases, the EPA, on a case-by-case basis. The EPA has also adopted rules requiring annual monitoring and reporting of GHG emissions from specified sources in the United States, including, among others, certain onshore and offshore oil and natural gas production facilities.

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The Companies Act 2006 (Strategic and Directors' Reports) Regulations 2013 now requires all quoted U.K. companies to report their annual GHG emissions in the company's directors' report. Additionally, in recent years, cap and trade initiatives to limit GHG emissions have been introduced in the European Union. Similarly, a number of bills related to climate change have been introduced in the U.S. Congress. If these or similar bills were to be adopted, such legislation could adversely impact many industries. However, it appears unlikely that comprehensive federal climate legislation will be passed by Congress in the foreseeable future. In the absence of federal legislation, almost half of the states have begun to address GHG emissions, primarily through the development or planned development of emission inventories or regional GHG cap and trade programs. Future regulation of GHG emissions could occur pursuant to future treaty obligations, statutory or regulatory changes or new climate change legislation in the jurisdictions in which we operate. If Congress undertakes comprehensive tax reform in the future, it is possible that such reform may include a carbon tax, which could impose additional direct costs on operations and reduce demand for refined products. Depending on the particular program, we, or our customers, could be required to control GHG emissions or to purchase and surrender allowances for GHG emissions resulting from our operations. It is uncertain whether any of these initiatives will be implemented. If such initiatives are implemented, we do not believe that such initiatives would have a direct, material adverse effect on our financial condition, operating results or cash flows in a manner different than our competitors.

Restrictions on GHG 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 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 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 utilize cash flow hedges to hedge forecasted foreign currency denominated transactions, primarily to reduce our exposure to foreign currency exchange rate risk on future expected contract drilling expenses and capital expenditures denominated in various foreign currencies. 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. As of December 31, 2014, we had cash flow hedges outstanding to exchange an aggregate $373.1 million for various foreign currencies.

We have net assets and liabilities denominated in numerous foreign currencies and use various strategies to manage our exposure to changes in foreign currency exchange rates. We occasionally enter into derivatives that hedge the fair value of recognized foreign currency denominated assets or liabilities, thereby reducing exposure to earnings fluctuations caused by changes in foreign currency exchange rates. We 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 December 31, 2014, we held derivatives not designated as hedging instruments to exchange an aggregate $207.5 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 as of December 31, 2014 would

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approximate $21.7 million. Approximately $18.1 million of these unrealized losses would be offset by corresponding gains on the derivatives utilized to offset changes in the fair value of net assets and liabilities denominated in foreign currencies.

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 counterparties of our derivatives through a variety of techniques, including transacting with multiple, high-quality financial institutions, thereby limiting our exposure to individual counterparties and by entering into International Swaps and Derivatives Association, Inc. (“ISDA”) Master Agreements, which include provisions for a legally enforceable master netting agreement, with almost all of our derivative counterparties. The terms of the ISDA agreements may also include credit support requirements, cross default provisions, termination events, or set-off provisions. Legally enforceable master netting agreements reduce credit risk by providing protection in bankruptcy in certain circumstances and generally permitting the closeout and netting of transactions with the same counterparty upon the occurrence of certain events.

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 does not expose us to material credit risk or any other material market risk. All our derivatives mature during the next 18 months. See Note 5 to our consolidated financial statements for additional information on our derivative instruments.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

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 consolidated financial statements. 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.

Property and Equipment

As of December 31, 2014, the carrying value of our property and equipment totaled $12.5 billion, which represented 78% 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.

The useful lives of our drilling rigs are difficult to estimate due to a variety of factors, including technological advances that impact the methods or cost of oil and natural gas exploration and development, changes in market or economic conditions and changes in laws or regulations affecting the drilling industry. We evaluate the remaining

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useful lives of our rigs on a periodic basis, considering operating condition, functional capability and market and economic factors.

Our fleet of 20 floater rigs marketed for contract drilling services, exclusive of three rigs under construction, represented 62% of the gross cost and 66% of the net carrying amount of our depreciable property and equipment as of December 31, 2014.  Our floater rigs are depreciated over useful lives ranging from 15 to 35 years.  Our fleet of 36 jackup rigs marketed for contract drilling services, exclusive of four rigs under construction, represented 26% of the gross cost and 21% of the net carrying amount of our depreciable property and equipment as of December 31, 2014.  Our jackup rigs are depreciated over useful lives ranging from ten to 30 years.  The following table provides an analysis of estimated increases and decreases in depreciation expense from continuing operations that would have been recognized for the year ended December 31, 2014 for various assumed changes in the useful lives of our drilling rigs effective January 1, 2014:

Increase (decrease) in useful lives of our drilling rigs	Estimated (decrease) increase in depreciation expense that would have been recognized (in millions)
10%	$(44.3)
20%	(81.2)
(10%)	48.3
(20%)	104.4

Impairment of Long-Lived Assets and Goodwill

During the year ended December 31, 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2.5 billion and a non-cash loss on impairment of our Floaters reporting unit goodwill of $3.0 billion. See "Note 3 - Property and Equipment" and "Note 8 - Goodwill and Other Intangible Assets and Liabilities" to our consolidated financial statements for additional information on our property and equipment and goodwill, respectively.

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. 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.

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 levels, 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.

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 two

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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 all 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 both 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. 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 both of our reporting units has been impaired.

The calculation of fair values of our reporting units is based on a blended income and market approach. The income approach is 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 levels, 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. It is reasonably possible that the judgments and assumptions inherent in our goodwill impairment test may change in response to future market conditions.

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 or other assumptions 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.

Asset impairment evaluations are 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 levels, 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.

Income Taxes

We conduct operations and earn income in numerous countries and are subject to the laws of numerous tax jurisdictions.  As of December 31, 2014, our consolidated balance sheet included an $81.3 million net deferred income tax liability, an $84.2 million liability for income taxes currently payable and a $160.9 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 offset deferred tax assets and deferred tax liabilities attributable to different tax paying jurisdictions.

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We do not provide deferred taxes on the undistributed earnings of certain subsidiaries because our policy and intention is to reinvest such earnings indefinitely. Should we make a distribution from these subsidiaries in the form of dividends or otherwise, we would be subject to additional income taxes.

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 several 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. In some jurisdictions, income tax payments may be required before a final income tax obligation is determined in order to avoid significant penalties and/or interest. 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:

• During recent years, the number of tax jurisdictions in which we conduct operations has increased, and we currently anticipate that this trend will 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 and challenged 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, treaties and the administrative practices and precedents of tax authorities change frequently, requiring us to modify existing tax strategies to conform to such changes.

NEW ACCOUNTING PRONOUNCEMENTS

In April 2014, the Financial Accounting Standards Board issued Accounting Standards Update 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity ("Update 2014-08"). The new guidance changes the criteria for reporting discontinued operations and enhances disclosure requirements. Under the new guidance, only disposals representing a strategic shift in operations should be presented as discontinued operations. Update 2014-08 is effective for annual and interim periods for fiscal years beginning on or after December 15, 2014 and early adoption is permitted for disposals that have not been reported in financial statements previously issued or available for issuance. We will adopt the accounting standard on January 1, 2015. The adoption of ASU 2014-08 is expected to reduce the number of components reported as discontinued operations prospectively in our consolidated financial statements.

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) ("Update 2014-09"), which requires an entity to recognize the

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amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective on January 1, 2017. Early application is not permitted. We are currently evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures.

In June 2014, the Financial Accounting Standards Board issued Accounting Standards Update 2014-12, Compensation- Stock Compensation (Topic 718): Accounting for Share Payments When the Terms of an Award Provide That a Performance Target Could be Achieved After the Requisite Service Period ("Update 2014-12"). The new guidance clarifies that entities should treat performance targets that can be met after the requisite service period of a share-based payment award as performance conditions that affect vesting. Update 2014-12 is effective for annual and interim periods for fiscal years beginning after December 15, 2015 and early adoption is permitted. We will adopt the accounting standard on a prospective basis effective January 1, 2016. We do not expect the adoption to have a material effect on our consolidated financial statements.

In August 2014, the Financial Accounting Standards Board issued Accounting Standards Update 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (“Update 2014-15”). The new guidance clarifies management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. Update 2014-15 is effective for annual periods ending after December 15, 2016 and for annual periods and interim periods thereafter. Early adoption is permitted. We will adopt the accounting standard on January 1, 2016. We do not expect the adoption to have a material effect on our consolidated financial statements.     

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk

Information required under Item 7A. has been incorporated into "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Market Risk."

Item 8.  Financial Statements and Supplementary Data

MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) or 15d-15(f). Our internal control over financial reporting system is designed to provide reasonable assurance to our management and Board of Directors regarding the preparation and fair presentation of published financial statements. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Therefore, even those systems determined

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to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, we have conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control - Integrated Framework (1992) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, we have concluded that our internal control over financial reporting is effective as of December 31, 2014 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.

KPMG LLP, the independent registered public accounting firm who audited our consolidated financial statements, has issued an audit report on our internal control over financial reporting. KPMG LLP's audit report on our internal control over financial reporting is included herein.

March 2, 2015

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Shareholders

Ensco plc:

We have audited the accompanying consolidated balance sheets of Ensco plc and subsidiaries (the Company) as of December 31, 2014 and 2013, and the related consolidated statements of operations, comprehensive (loss) income, and cash flows for each of the years in the three-year period ended December 31, 2014. These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Ensco plc and subsidiaries as of December 31, 2014 and 2013, and the results of their operations and their cash flows for each of the years in the three‑year period ended December 31, 2014, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Ensco plc’s internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control - Integrated Framework (1992) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), and our report dated March 2, 2015 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

/s/ KPMG LLP

Houston, Texas

March 2, 2015

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Shareholders

Ensco plc:

We have audited Ensco plc’s (the Company) internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control - Integrated Framework (1992) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed 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. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Ensco plc maintained, in all material respects, effective internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control - Integrated Framework (1992) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Ensco plc and subsidiaries as of December 31, 2014 and 2013, and the related consolidated statements of operations, comprehensive (loss) income, and cash flows for each of the years in the three-year period ended December 31, 2014, and our report dated March 2, 2015 expressed an unqualified opinion on those consolidated financial statements.

 /s/ KPMG LLP

Houston, Texas

March 2, 2015

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ENSCO PLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(in millions, except per share amounts)

	Year Ended December 31,
	2014			2013			2012
OPERATING REVENUES	$	4,564.5		$	4,323.4		$	3,638.8
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	2,076.9			1,947.1			1,642.8
Loss on impairment	4,218.7			—			—
Depreciation	537.9			496.2			443.8
General and administrative	131.9			146.8			148.9
	6,965.4			2,590.1			2,235.5
OPERATING (LOSS) INCOME	(2,400.9		)	1,733.3			1,403.3
OTHER INCOME (EXPENSE)
Interest income	13.0			16.6			22.8
Interest expense, net	(161.4		)	(158.8		)	(123.6		)
Other, net	.5			42.1			2.2
	(147.9		)	(100.1		)	(98.6		)
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(2,548.8		)	1,633.2			1,304.7
PROVISION FOR INCOME TAXES
Current income tax expense	264.0			193.0			200.8
Deferred income tax (benefit) expense	(123.5		)	10.1			27.8
	140.5			203.1			228.6
(LOSS) INCOME FROM CONTINUING OPERATIONS	(2,689.3		)	1,430.1			1,076.1
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET	(1,199.2		)	(2.2		)	100.6
NET (LOSS) INCOME	(3,888.5		)	1,427.9			1,176.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(14.1		)	(9.7		)	(7.0		)
NET (LOSS) INCOME ATTRIBUTABLE TO ENSCO	$	(3,902.6	)	$	1,418.2		$	1,169.7
(LOSS) EARNINGS PER SHARE - BASIC
Continuing operations	$	(11.70	)	$	6.09		$	4.62
Discontinued operations	(5.18		)	(0.01		)	0.43
	$	(16.88	)	$	6.08		$	5.05
(LOSS) EARNINGS PER SHARE - DILUTED
Continuing operations	$	(11.70	)	$	6.08		$	4.61
Discontinued operations	(5.18		)	(0.01		)	0.43
	$	(16.88	)	$	6.07		$	5.04
NET (LOSS) INCOME ATTRIBUTABLE TO ENSCO SHARES - BASIC AND DILUTED	$	(3,910.5	)	$	1,403.1		$	1,157.4
WEIGHTED-AVERAGE SHARES OUTSTANDING
Basic	231.6			230.9			229.4
Diluted	231.6			231.1			229.7
CASH DIVIDENDS PER SHARE	$	3.00		$	2.25		$	1.50

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

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ENSCO PLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

(in millions)

	Year Ended December 31,
	2014			2013			2012
NET (LOSS) INCOME	$	(3,888.5	)	$	1,427.9		$	1,176.7
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	(11.7		)	(5.8		)	8.7
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	(.9		)	2.0			—
Other	6.3			1.9			2.8
NET OTHER COMPREHENSIVE (LOSS) INCOME	(6.3		)	(1.9		)	11.5
COMPREHENSIVE (LOSS) INCOME	(3,894.8		)	1,426.0			1,188.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(14.1		)	(9.7		)	(7.0		)
COMPREHENSIVE (LOSS) INCOME ATTRIBUTABLE TO ENSCO	$	(3,908.9	)	$	1,416.3		$	1,181.2

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

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ENSCO PLC AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(in millions, except share and par value amounts)

	December 31,
ASSETS	2014			2013
CURRENT ASSETS
Cash and cash equivalents	$	664.8		$	165.6
Short-term investments	757.3			50.0
Accounts receivable, net	883.3			855.7
Other	629.4			463.9
Total current assets	2,934.8			1,535.2
PROPERTY AND EQUIPMENT, AT COST	14,975.5			17,498.5
Less accumulated depreciation	2,440.7			3,187.5
Property and equipment, net	12,534.8			14,311.0
GOODWILL	276.1			3,274.0
OTHER ASSETS, NET	314.2			352.7
	$	16,059.9		$	19,472.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable - trade	$	373.2		$	341.1
Accrued liabilities and other	696.6			658.7
Current maturities of long-term debt	34.8			47.5
Total current liabilities	1,104.6			1,047.3
LONG-TERM DEBT	5,885.6			4,718.9
DEFERRED INCOME TAXES	179.5			362.1
OTHER LIABILITIES	667.3			545.7
COMMITMENTS AND CONTINGENCIES
ENSCO SHAREHOLDERS' EQUITY
Class A ordinary shares, U.S. $.10 par value, 450.0 million shares authorized,        240.7 million and 239.5 million shares issued as of December 31, 2014 and 2013	24.1			24.0
Class B ordinary shares, £1 par value, 50,000 shares authorized and issued        as of December 31, 2014 and 2013	.1			.1
Additional paid-in capital	5,517.5			5,467.2
Retained earnings	2,720.4			7,327.3
Accumulated other comprehensive income	11.9			18.2
Treasury shares, at cost, 6.5 million shares and 6.0 million shares	(59.0		)	(45.2		)
Total Ensco shareholders' equity	8,215.0			12,791.6
NONCONTROLLING INTERESTS	7.9			7.3
Total equity	8,222.9			12,798.9
	$	16,059.9		$	19,472.9

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

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ENSCO PLC AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CASH FLOWS (in millions)
	Year Ended December 31,
	2014			2013			2012
OPERATING ACTIVITIES
Net (loss) income	$	(3,888.5	)	$	1,427.9		$	1,176.7
Adjustments to reconcile net (loss) income to net cash provided by operating activities of continuing operations:
Loss (income) from discontinued operations, net	1,199.2			2.2			(100.6		)
Loss on impairment	4,218.7			—			—
Depreciation expense	537.9			496.2			443.8
Deferred income tax (benefit) expense	(123.5		)	10.1			27.8
Share-based compensation expense	45.1			50.3			53.2
Amortization of intangibles and other, net	(7.9		)	(28.4		)	(33.6		)
Settlement of warranty and other claims	—			(11.0		)	(57.9		)
Other	(16.4		)	15.0			6.0
Changes in operating assets and liabilities	93.3			(151.1		)	439.2
Net cash provided by operating activities of continuing operations	2,057.9			1,811.2			1,954.6
INVESTING ACTIVITIES
Additions to property and equipment	(1,568.8		)	(1,763.5		)	(1,713.2		)
Purchases of short-term investments	(790.6		)	(50.0		)	(90.0		)
Net proceeds from disposition of assets	169.2			6.0			3.2
Maturities of short-term investments	83.3			50.0			44.5
Net cash used in investing activities of continuing operations	(2,106.9		)	(1,757.5		)	(1,755.5		)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	1,246.4			—			—
Cash dividends paid	(703.0		)	(525.6		)	(348.1		)
Reduction of long-term borrowings	(60.1		)	(47.5		)	(47.5		)
Debt financing costs	(13.4		)	(4.6		)	—
Proceeds from exercise of share options	2.6			22.3			35.8
Commercial paper borrowings, net	—			—			(125.0		)
Equity issuance reimbursement	—			—			66.7
Other	(29.8		)	(21.7		)	(17.4		)
Net cash provided by (used in) financing activities	442.7			(577.1		)	(435.5		)
DISCONTINUED OPERATIONS
Operating activities	(3.8		)	169.3			232.5
Investing activities	109.3			32.8			58.3
Net cash provided by discontinued operations	105.5			202.1			290.8
Effect of exchange rate changes on cash and cash equivalents	—			(.2		)	2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	499.2			(321.5		)	56.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	165.6			487.1			430.7
CASH AND CASH EQUIVALENTS, END OF YEAR	$	664.8		$	165.6		$	487.1

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

84

ENSCO PLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  DESCRIPTION OF THE BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Business

We are one of the leading providers of offshore contract drilling services to the international oil and gas industry. We own an offshore drilling rig fleet of 70 rigs, including seven rigs under construction, spanning most of the strategic markets around the globe. Our rig fleet includes ten drillships, 13 dynamically positioned semisubmersible rigs, five moored semisubmersible rigs and 42 jackup rigs.  Our fleet is the world's second largest amongst competitive rigs, our ultra-deepwater fleet is one of the newest in the industry, and our premium jackup fleet is the largest of any offshore drilling company.

Our customers include many of the leading national and international oil companies, in addition to many independent operators. We are among the most geographically diverse offshore drilling companies, with current operations and drilling contracts spanning approximately 20 countries on six continents in nearly every major offshore basin around the world. The markets in which we operate include the U.S. Gulf of Mexico, Mexico, Brazil, the Mediterranean, the North Sea, the Middle East, West Africa, Australia and Southeast Asia.

We provide drilling services on a "day rate" contract basis. Under day rate contracts, we provide a drilling rig and rig crews and receive a fixed amount per day for each day we are performing drilling or related services. Our customers bear substantially all of the ancillary costs of constructing the well and supporting drilling operations, as well as the economic risk relative to the success of the well. In addition, our customers may pay all or a portion of the cost of moving our equipment and personnel to and from the well site. We do not provide "turnkey" or other risk-based drilling services.

Redomestication

During 2009, we completed a reorganization of the corporate structure of the group of companies controlled by our predecessor, ENSCO International Incorporated ("Ensco Delaware"), pursuant to which an indirect, wholly-owned subsidiary merged with Ensco Delaware, and Ensco plc became our publicly-held parent company incorporated under English law (the "redomestication").

We remain subject to the U.S. Securities and Exchange Commission (the "SEC") reporting requirements, the mandates of the Sarbanes-Oxley Act of 2002, as amended, and the applicable corporate governance rules of the New York Stock Exchange ("NYSE"), and we will continue to report our consolidated financial results in U.S. dollars and in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"). We also must comply with additional reporting requirements of English law.

Basis of Presentation—U.K. Companies Act 2006 Section 435 Statement

The accompanying consolidated financial statements have been prepared in accordance with U.S. GAAP, which the Board of Directors consider to be the most meaningful presentation of our results of operations and financial position.  The accompanying consolidated financial statements do not constitute statutory accounts required by the U.K. Companies Act 2006, which for the year ended December 31, 2014 will be prepared in accordance with generally accepted accounting principles in the U.K. and delivered to the Registrar of Companies in the U.K. following the annual general meeting of shareholders.  The U.K. statutory accounts are expected to include an unqualified auditor’s report, which is not expected to contain any references to matters on which the auditors drew attention by way of emphasis without qualifying the report or any statements under Sections 498(2) or 498(3) of the U.K. Companies Act 2006.

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Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Ensco plc and its majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Certain previously reported amounts have been reclassified to conform to the current year presentation.

Pervasiveness of Estimates

The preparation of financial statements in conformity with U.S. GAAP 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.

Foreign Currency Remeasurement and Translation

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 ("foreign currencies"). These transactions are remeasured in U.S. dollars based on a combination of both current and historical exchange rates. Most transaction gains and losses, including certain gains and losses on our derivative instruments, are included in other, net, in our consolidated statement of operations.  Certain gains and losses from the translation of foreign currency balances of our non-U.S. dollar functional currency subsidiaries are included in accumulated other comprehensive income on our consolidated balance sheet.  Net foreign currency exchange gains and losses, inclusive of offsetting fair value derivatives, were $2.6 million of losses, $6.4 million of gains and $3.5 million of losses, and were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.

Cash Equivalents and Short-Term Investments

Highly liquid investments with maturities of three months or less at the date of purchase are considered cash equivalents. Highly liquid investments with maturities of greater than three months but less than one year at the date of purchase are classified as short-term investments.

Short-term investments, consisting of time deposits with initial maturities in excess of three months but less than one year, were included in other current assets on our consolidated balance sheets and totaled $757.3 million and $50.0 million as of December 31, 2014 and 2013, respectively. Cash flows from purchases and maturities of short-term investments were classified as investing activities in our consolidated statements of cash flows for the years ended December 31, 2014, 2013 and 2012.

Property and Equipment

All costs incurred in connection with the acquisition, construction, major enhancement and improvement of assets are capitalized, including allocations of interest incurred during periods that our drilling rigs are under construction or undergoing major enhancements and improvements. Repair and maintenance costs are charged to contract drilling expense in the period in which they are incurred. Upon sale or retirement of assets, the related cost and accumulated depreciation are removed from the balance sheet, and the resulting gain or loss is included in contract drilling expense, unless reclassified to discontinued operations.

Our property and equipment is depreciated on a straight-line basis, after allowing for salvage values, over the estimated useful lives of our assets. Drilling rigs and related equipment are depreciated over estimated useful lives ranging from four to 35 years.  Buildings and improvements are depreciated over estimated useful lives ranging from two to 30 years. Other equipment, including computer and communications hardware and software costs, is depreciated over estimated useful lives ranging from two to six years.

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We evaluate the carrying value of our property and equipment for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. 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. Property and equipment held for sale is recorded at the lower of net book value or net realizable value.

During 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2.5 billion. See "Note 3 - Property and Equipment" for additional information on these impairments.

If the global economy deteriorates and/or our expectation relative to future offshore drilling industry conditions decline, it is reasonably possible that additional impairment charges may occur with respect to specific individual rigs, groups of rigs, such as a specific type of drilling rig, or rigs in a certain geographic location.

Goodwill

Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

We test goodwill for impairment on an annual basis as of December 31 of each year 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.

If we conclude that the fair value of one or both of our reporting units has more-likely-than-not declined below its carrying amount after qualitatively assessing existing facts and circumstances, we perform a quantitative assessment whereby we estimate the fair value of each reporting unit.  In most instances, our calculation of the fair value of our reporting units is based on estimates of future discounted cash flows to be generated by the drilling rigs in the reporting unit.

Based on a qualitative assessment performed as of December 31, 2014, we concluded it was more-likely-than-not that the fair value of our Floater reporting unit was less than its carrying amount and performed a quantitative assessment. As a result, we concluded that our Floater reporting unit goodwill balance was impaired. See "Note 8 - Goodwill and Other Intangible Assets and Liabilities" for additional information on our goodwill.

We concluded the fair value of our Jackup reporting more-likely-than-not exceeded its carrying amount, and there was no impairment of goodwill.

Operating Revenues and Expenses

Substantially all of our drilling contracts ("contracts") are performed on a day rate basis, and the terms of such contracts are typically for a specific period of time or the period of time required to complete a specific task, such as drill a well. Contract revenues and expenses are recognized on a per day basis, as the work is performed. Day rate revenues are typically earned, and contract drilling expense is typically incurred, on a uniform basis over the terms of our contracts.

In connection with some contracts, we receive lump-sum fees or similar compensation for the mobilization of equipment and personnel prior to the commencement of drilling services or the demobilization of equipment and personnel upon contract completion. Fees received for the mobilization or demobilization of equipment and personnel are included in operating revenues. The costs incurred in connection with the mobilization and demobilization of equipment and personnel are included in contract drilling expense.

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Mobilization fees received and costs incurred prior to commencement of drilling operations are deferred and recognized on a straight-line basis over the period that the related drilling services are performed. Demobilization fees and related costs are recognized as incurred upon contract completion. Costs associated with the mobilization of equipment and personnel to more promising market areas without contracts are expensed as incurred.

Deferred mobilization costs were included in other current assets and other assets, net, on our consolidated balance sheets and totaled $95.7 million and $66.6 million as of December 31, 2014 and 2013, respectively. Deferred mobilization revenue was included in accrued liabilities and other, and other liabilities on our consolidated balance sheets and totaled $149.4 million and $76.8 million as of December 31, 2014 and 2013, respectively.

In connection with some contracts, we receive up-front lump-sum fees or similar compensation for capital improvements to our drilling rigs. Such compensation is deferred and recognized as revenue over the period that the related drilling services are performed. The cost of such capital improvements is capitalized and depreciated over the useful life of the asset. Deferred revenue associated with capital improvements was included in accrued liabilities and other, and other liabilities on our consolidated balance sheets and totaled $428.9 million and $273.6 million as of December 31, 2014 and 2013, respectively.

We must obtain certifications from various regulatory bodies in order to operate our drilling rigs and must maintain such certifications through periodic inspections and surveys. The costs incurred in connection with maintaining such certifications, including inspections, tests, surveys and drydock, as well as remedial structural work and other compliance costs, are deferred and amortized over the corresponding certification periods. Deferred regulatory certification and compliance costs were included in other current assets and other assets, net, on our consolidated balance sheets and totaled $20.0 million and $18.3 million as of December 31, 2014 and 2013, respectively.

In certain countries in which we operate, taxes such as sales, use, value-added, gross receipts and excise may be assessed by the local government on our revenues. We generally record our tax-assessed revenue transactions on a net basis in our consolidated statement of operations.

Derivative Instruments

We use derivatives to reduce our exposure to various market risks, primarily foreign currency exchange rate risk. See "Note 5 - Derivative Instruments" for additional information on how and why we use derivatives.

All derivatives are recorded on our consolidated balance sheet at fair value. Derivatives subject to legally enforceable master netting agreements are not offset on our consolidated balance sheet. 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. Derivatives qualify for hedge accounting when they are formally designated as hedges and are effective in reducing the risk exposure that they are designated to hedge. Our assessment of hedge effectiveness is formally documented at hedge inception, and we review hedge effectiveness and measure any ineffectiveness throughout the designated hedge period on at least a quarterly basis.

Changes in the fair value of derivatives that are designated as hedges of the variability in expected future cash flows associated with existing recognized assets or liabilities or forecasted transactions ("cash flow hedges") are recorded in accumulated other comprehensive income ("AOCI").  Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transactions.

Gains and losses on a cash flow hedge, or a portion of a cash flow hedge, that no longer qualifies as effective due to an unanticipated change in the forecasted transaction are recognized currently in earnings and included in other, net, in our consolidated statement of operations based on the change in the fair value of the derivative. When a forecasted transaction is probable of not occurring, gains and losses on the derivative previously recorded in AOCI are reclassified currently into earnings and included in other, net, in our consolidated statement of operations.

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We occasionally enter into derivatives that hedge the fair value of recognized assets or liabilities, but do not designate such derivatives as hedges or the derivatives otherwise do not qualify for hedge accounting. In these situations, there generally is a natural hedging relationship where changes in the fair value of the derivatives offset changes in the fair value of the underlying hedged items. Changes in the fair value of these derivatives are recognized currently in earnings in other, net, in our consolidated statement of operations.

Derivatives with asset fair values are reported in other current assets or other assets, net, on our consolidated balance sheet depending on maturity date. Derivatives with liability fair values are reported in accrued liabilities and other, or other liabilities on our consolidated balance sheet depending on maturity date.

Income Taxes

We conduct operations and earn income in numerous countries. Current income taxes are recognized for the amount of taxes payable or refundable based on the laws and income tax rates in the taxing jurisdictions in which operations are conducted and income is earned.

Deferred tax assets and liabilities are recognized for the anticipated future tax effects of temporary differences between the financial statement basis and the tax basis of our assets and liabilities using the enacted tax rates in effect at year-end. A valuation allowance for deferred tax assets is recorded when it is more-likely-than-not that the benefit from the deferred tax asset will not be realized. We do not offset deferred tax assets and deferred tax liabilities attributable to different tax paying jurisdictions.

We operate in certain jurisdictions where tax laws relating to the offshore drilling industry are not well developed and change frequently. Furthermore, we may enter into transactions with affiliates or employ other tax planning strategies that generally are subject to complex tax regulations. As a result of the foregoing, the tax liabilities and assets we recognize in our financial statements may differ from the tax positions taken, or expected to be taken, in our tax returns. Our tax positions are evaluated for recognition using a more-likely-than-not threshold, and those tax positions requiring recognition are measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon effective settlement with a taxing authority that has full knowledge of all relevant information. Interest and penalties relating to income taxes are included in current income tax expense in our consolidated statement of operations.

Our drilling rigs frequently move from one taxing jurisdiction to another based on where they are contracted to perform drilling services. The movement of drilling rigs among taxing jurisdictions may involve a transfer of drilling rig ownership among our subsidiaries (“intercompany rig sale”). The pre-tax profit resulting from an intercompany rig sale is eliminated from our consolidated financial statements, and the carrying value of a rig sold in an intercompany transaction remains at historical net depreciated cost prior to the transaction. Our consolidated financial statements do not reflect the asset disposition transaction of the selling subsidiary or the asset acquisition transaction of the acquiring subsidiary. Income taxes resulting from an intercompany rig sale, as well as the tax effect of any reversing temporary differences resulting from the sale, are deferred and amortized on a straight-line basis over the remaining useful life of the rig.

In some instances, we may determine that certain temporary differences will not result in a taxable or deductible amount in future years, as it is more-likely-than-not we will commence operations and depart from a given taxing jurisdiction without such temporary differences being recovered or settled. Under these circumstances, no future tax consequences are expected and no deferred taxes are recognized in connection with such operations. We evaluate these determinations on a periodic basis and, in the event our expectations relative to future tax consequences change, the applicable deferred taxes are recognized or derecognized.

We do not provide deferred taxes on the undistributed earnings of certain subsidiaries because our policy and intention is to reinvest such earnings indefinitely. See "Note 9 - Income Taxes" for additional information on our deferred taxes, unrecognized tax benefits, intercompany transfers of drilling rigs and undistributed earnings.

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Share-Based Compensation

We sponsor share-based compensation plans that provide equity compensation to our key employees, officers and non-employee directors. Share-based compensation cost is measured at fair value on the date of grant and recognized on a straight-line basis over the requisite service period (usually the vesting period). The amount of compensation cost recognized in our consolidated statement of operations is based on the awards ultimately expected to vest and, therefore, reduced for estimated forfeitures. All changes in estimated forfeitures are based on historical experience and are recognized as a cumulative adjustment to compensation cost in the period in which they occur. See "Note 7 - Benefit Plans" for additional information on our share-based compensation.

Fair Value Measurements

We measure certain of our assets and liabilities based on a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy assigns the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities ("Level 1") and the lowest priority to unobservable inputs ("Level 3").  Level 2 measurements represent inputs that are observable for similar assets or liabilities, either directly or indirectly, other than quoted prices included within Level 1.  See "Note 2 - Fair Value Measurements" for additional information on the fair value measurement of certain of our assets and liabilities.

Earnings Per Share

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

The following table is a reconciliation of (loss) income from continuing operations attributable to Ensco shares used in our basic and diluted EPS computations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
(Loss) income from continuing operations attributable to Ensco	$	(2,703.1	)	$	1,421.6		$	1,069.6
Income from continuing operations allocated to non-vested share awards	(7.9		)	(15.1		)	(11.2		)
(Loss) income from continuing operations attributable to Ensco shares	$	(2,711.0	)	$	1,406.5		$	1,058.4

The following table is a reconciliation of the weighted-average shares used in our basic and diluted earnings per share computations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014	2013	2012
Weighted-average shares - basic	231.6	230.9	229.4
Potentially dilutive shares	—	.2	.3
Weighted-average shares - diluted	231.6	231.1	229.7

Antidilutive share options totaling 400,000, 300,000 and 400,000 for the years ended December 31, 2014, 2013 and 2012, respectively, were excluded from the computation of diluted EPS.

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Noncontrolling Interests

Third parties hold a noncontrolling ownership interest in certain of our non-U.S. subsidiaries. Noncontrolling interests are classified as equity on our consolidated balance sheet and net income attributable to noncontrolling interests is presented separately in our consolidated statement of operations. 

(Loss) income from continuing operations attributable to Ensco for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
(Loss) income from continuing operations	$	(2,689.3	)	$	1,430.1		$	1,076.1
Income from continuing operations attributable to noncontrolling interests	(13.8		)	(8.5		)	(6.5		)
(Loss) income from continuing operations attributable to Ensco	$	(2,703.1	)	$	1,421.6		$	1,069.6

(Loss) income from discontinued operations attributable to Ensco for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
(Loss) income from discontinued operations	$	(1,199.2	)	$	(2.2	)	$	100.6
Income from discontinued operations attributable to noncontrolling interests	(.3		)	(1.2		)	(.5		)
(Loss) income from discontinued operations attributable to Ensco	$	(1,199.5	)	$	(3.4	)	$	100.1

New Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) ("Update 2014-09"), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective on January 1, 2017. Early application is not permitted. We are currently evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures.

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2.  FAIR VALUE MEASUREMENTS

The following fair value hierarchy table categorizes information regarding our net financial assets measured at fair value on a recurring basis as of December 31, 2014 and 2013 (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 December 31, 2014
Supplemental executive retirement plan assets	$	43.2	$	—		$	—	$	43.2
Total financial assets	$	43.2	$	—		$	—	$	43.2
Derivatives, net	—		(26.3		)	—		(26.3		)
Total financial liabilities	$	—	$	(26.3	)	$	—	$	(26.3	)
As of December 31, 2013
Supplemental executive retirement plan assets	$	37.7	$	—		$	—	$	37.7
Derivatives, net	—		1.8			—		1.8
Total financial assets	$	37.7	$	1.8		$	—	$	39.5

Supplemental Executive Retirement Plans

Our Ensco supplemental executive retirement plans (the "SERP") are non-qualified plans that provide for eligible employees 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 consolidated balance sheets as of December 31, 2014 and 2013.  The fair value measurements of assets held in the SERP were based on quoted market prices. Net unrealized gains of $2.3 million, $6.2 million and $2.8 million from marketable securities held in our SERP were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.

Derivatives

Our derivatives were measured at fair value on a recurring basis using Level 2 inputs as of December 31, 2014 and 2013.  See "Note 5 - 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 measurements of our derivatives were based on market prices that are generally observable for similar assets or liabilities at commonly quoted intervals.

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Other Financial Instruments

The carrying values and estimated fair values of our debt instruments as of December 31, 2014 and 2013 were as follows (in millions):

	December 31, 2014				December 31, 2013
	Carrying Value		Estimated   Fair Value		Carrying Value		Estimated   Fair Value
4.70% Senior notes due 2021	$	1,479.9	$	1,505.3	$	1,477.2	$	1,596.9
6.875% Senior notes due 2020	1,008.2		1,008.5		1,024.8		1,086.7
3.25% Senior notes due 2016	998.0		1,018.3		996.5		1,045.8
4.50% Senior notes due 2024	624.2		602.0		—		—
5.75% Senior notes due 2044	622.3		615.8		—		—
8.50% Senior notes due 2019	583.8		611.8		600.5		635.8
7.875% Senior notes due 2040	381.2		363.8		382.6		410.5
7.20% Debentures due 2027	149.2		171.4		149.1		178.6
4.33% MARAD bonds, including current maturities, due 2016	46.6		46.8		78.9		79.7
6.36% MARAD bonds, including current maturities, due 2015	—		—		25.3		27.1
4.65% MARAD bonds, including current maturities, due 2020	27.0		29.7		31.5		35.2
Total	$	5,920.4	$	5,973.4	$	4,766.4	$	5,096.3

The estimated fair values of our senior notes and debentures were determined using quoted market prices. The estimated fair values of our U.S. Maritime Administration ("MARAD") bonds were determined using an income approach valuation model. The estimated fair values of our cash and cash equivalents, short-term investments, receivables, trade payables and other liabilities approximated their carrying values as of December 31, 2014 and 2013.

See "Note 3 - Property and Equipment" for additional information on the fair value measurement of property and equipment and "Note 8 - Goodwill and Other Intangible Assets and Liabilities" for additional information on the fair value measurement of goodwill.

3.  PROPERTY AND EQUIPMENT

Property and equipment as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Drilling rigs and equipment	$	13,253.2	$	15,839.0
Other	135.0		101.0
Work in progress	1,587.3		1,558.5
	$	14,975.5	$	17,498.5

During 2014, drilling rigs and equipment declined$2.6 billion primarily due to a loss on impairment of $2.5 billion, depreciation expense of $537.9 million and $152.4 million classified as "held for sale" included in other current assets on our December 31, 2014 consolidated balance sheet. These declines were partially offset by ENSCO 120, ENSCO 121 and ENSCO 122, which were placed into service during 2014 and capital upgrades to the existing rig fleet.

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Work in progress as of December 31, 2014 primarily consisted of $820.1 million related to the construction of ENSCO DS-8, ENSCO DS-9 and ENSCO DS-10 ultra-deepwater drillships, $233.1 million related to a capital enhancement project on ENSCO 5006, $179.3 million related to the construction of ENSCO 110, ENSCO 140 and ENSCO 141 premium jackup rigs, $59.2 million related to the construction of ENSCO 123 ultra-premium harsh environment jackup rig and costs associated with various modification and enhancement projects.

Work in progress as of December 31, 2013 primarily consisted of $627.2 million related to the construction of ENSCO 120 Series ultra-premium harsh environment jackup rigs, $513.4 million related to the construction of ENSCO DS-8, ENSCO DS-9 and ENSCO D-S 10 ultra-deepwater drillships, $43.7 million related to the construction of ENSCO 110 premium jackup rig and costs associated with various modification and enhancement projects.

Impairment of Long-Lived Assets

During 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2,463.1 million, of which $1,220.8 million was included in (loss) income from continuing operations and $1,242.3 million was included in (loss) income from discontinued operations, net in our consolidated statement of operations. These losses were recorded during the second and fourth quarters.

During the second quarter, demand for floaters deteriorated as a result of continued reductions in capital spending by operators in addition to delays in operators’ drilling programs. The reduction in demand, combined with the increasing supply from newbuild floater deliveries, led to a very competitive market. In general, contracting activity declined significantly, and day rates and utilization came under pressure, especially for older, less capable floaters.

In response to the adverse change in the floaters business climate, management evaluated our older, less capable floaters and committed to a plan to sell five rigs. ENSCO 5000, ENSCO 5001, ENSCO 5002, ENSCO 6000 and ENSCO 7500 were removed from our portfolio of rigs marketed for contract drilling services and actively marketed for sale. These rigs were written down to fair value, less costs to sell. We completed the sale of ENSCO 5000 in December 2014. The remaining four floaters were classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

We measured the fair value of the "held for sale" rigs by applying a market approach, which was based on unobservable third-party estimated prices that would be received in exchange for the assets in an orderly transaction between market participants. We recorded a pre-tax, non-cash loss on impairment totaling $546.4 million during the second quarter associated with our "held for sale" rigs. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014.

During the fourth quarter, Brent crude oil prices declined from approximately $95 per barrel to near $55 per barrel on December 31, 2014. These declines resulted in further reductions in capital spending by operators, including the cancellation or deferral of planned drilling programs. As a result, day rates and utilization came under further pressure, especially for older, less capable rigs. The significant supply and demand imbalance will continue to be adversely impacted by future newbuild deliveries, program delays and lower capital spending by operators.

In response to the adverse change in business climate, management evaluated our aged rigs and committed to a plan to sell one additional floater and two jackups. ENSCO DS-2, ENSCO 58 and ENSCO 90 were removed from our portfolio of rigs marketed for contract drilling services. These rigs were written down to fair value, less costs to sell, during the fourth quarter and classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

As of December 31, 2014, we measured the fair value of our seven "held for sale" rigs by applying a market approach, which was based on unobservable third-party estimated prices that would be received in exchange for the assets in an orderly transaction between market participants. In addition to the asset impairment recorded during the second quarter, we recorded an additional pre-tax, non-cash loss on impairment totaling $407.9 million during the fourth quarter. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014. See "Note 10 - Discontinued Operations" for additional information on our "held for sale" rigs.

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On a quarterly basis, we evaluate the carrying value of our property and equipment to identify events or changes in circumstances ("triggering events") that indicate the carrying value may not be recoverable. During the second quarter, as a result of the adverse change in the floater business climate, management's decision to sell five floaters and the impairment charge incurred on the "held for sale" floaters, management concluded that a triggering event had occurred and performed an asset impairment analysis on our remaining older, less capable floaters.

Based on the analysis performed as of May 31, 2014, we recorded an additional pre-tax, non-cash loss on impairment with respect to four other floaters totaling $991.5 million, of which $288.0 million related to ENSCO DS-2 which was removed from our portfolio of rigs marketed for contract drilling services during the fourth quarter. The ENSCO DS-2 impairment charge was reclassified to (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014. The remaining $703.5 million impairment charge was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014. We measured the fair value of these rigs by applying an income approach, using projected discounted cash flows. These valuations were based on unobservable inputs that require significant judgments for which there is limited information, including assumptions regarding future day rates, utilization, operating costs and capital requirements.

During the fourth quarter, as a result of the decline in commodity prices and adverse changes in the offshore drilling market, management's decision to sell an additional floater and two jackups and the impairment charge incurred on the "held for sale" rigs, management concluded that a triggering event had occurred and performed an asset impairment analysis for all floaters and jackups.

Based on the analysis performed as of December 31, 2014, we recorded an additional pre-tax, non-cash loss on impairment with respect to two older, less capable floaters and ten older, less capable jackups totaling $517.3 million. The impairment charge was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014. We measured the fair value of these rigs by applying either an income approach, using projected discounted cash flows, or a market approach. These valuations were based on unobservable inputs that require significant judgments for which there is limited information, including assumptions regarding future day rates, utilization, operating costs and capital requirements.  

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4.  DEBT

The carrying value of long-term debt as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014			2013
4.70% Senior notes due 2021	$	1,479.9		$	1,477.2
6.875% Senior notes due 2020	1,008.2			1,024.8
3.25% Senior notes due 2016	998.0			996.5
4.50% Senior notes due 2024	624.2			—
5.75% Senior notes due 2044	622.3			—
8.50% Senior notes due 2019	583.8			600.5
7.875% Senior notes due 2040	381.2			382.6
7.20% Debentures due 2027	149.2			149.1
4.33% MARAD bonds due 2016	46.6			78.9
6.36% MARAD bonds due 2015	—			25.3
4.65% MARAD bonds due 2020	27.0			31.5
Total debt	5,920.4			4,766.4
Less current maturities	(34.8		)	(47.5		)
Total long-term debt	$	5,885.6		$	4,718.9

 Senior Notes

On September 29, 2014, we issued $625.0 million aggregate principal amount of unsecured 4.50% notes due 2024 at a discount of $850,000 and $625.0 million aggregate principal amount of unsecured 5.75% notes due 2044 (collectively the “2014 Notes”) at a discount of $2.8 million in a public offering. Interest on these notes is payable semiannually in April and October of each year commencing April 1, 2015.  The 2014 Notes were issued pursuant to an Indenture between us and Deutsche Bank Trust Company Americas, as trustee (the “Trustee”), dated March 17, 2011 (the "Indenture") and a Second Supplemental Indenture between us and the Trustee, dated September 29, 2014. The net proceeds from the sale of the 2014 Notes are being used for general corporate purposes. 

During 2011, we issued $1.0 billion aggregate principal amount of unsecured 3.25% notes due 2016 at a discount of $7.6 million and $1.5 billion aggregate principal amount of unsecured 4.70% notes due 2021 (collectively the “2011 Notes”) at a discount of $29.6 million in a public offering. Interest on these notes is payable semiannually in March and September of each year.  The 2011 Notes were issued pursuant to the Indenture, and a supplemental indenture between us and the Trustee, dated March 17, 2011. The net proceeds from the sale of the 2011 Notes were used to fund a portion of the cash consideration payable in connection with the Pride acquisition.

Upon consummation of the Pride acquisition during 2011, we assumed the acquired company's outstanding debt comprised of $900.0 million aggregate principal amount of 6.875% senior notes due 2020, $500.0 million aggregate principal amount of 8.5% senior notes due 2019 and $300.0 million aggregate principal amount of 7.875% senior notes due 2040 (the "Acquired Notes").  Under a supplemental indenture, Ensco plc has fully and unconditionally guaranteed the performance of all Pride obligations with respect to the Acquired Notes.  See "Note 15 - Guarantee of Registered Securities" for additional information on the guarantee of the Acquired Notes. 

We may redeem each series of the 2014 Notes in whole, at any time or in part from time to time, prior to maturity. If we elect to redeem the 2014 Notes due 2024 before the date that is three months prior to the maturity date or the 2014 Notes due 2044 before the date that is six months prior to the maturity date, we will pay an amount equal to 100% of the principal amount of the notes redeemed plus accrued and unpaid interest and a "make-whole" premium. If we elect to redeem the 2014 Notes on or after the aforementioned dates, we will pay an amount equal to 100% of the principal amount of the notes redeemed plus accrued and unpaid interest but we are not required to pay a "make-

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whole" premium. We may redeem each series of the 2011 Notes and the Acquired Notes, in whole or in part, at any time, at a price equal to 100% of their principal amount, plus accrued and unpaid interest and a "make-whole" premium.

The indentures governing the 2014 Notes, the 2011 Notes and the Acquired Notes contain customary events of default, including failure to pay principal or interest on such Notes when due, among others. The indentures governing the 2014 Notes, the 2011 Notes and the Acquired Notes also contain certain restrictions, including, among others, restrictions on our ability and the ability of our subsidiaries to create or incur secured indebtedness, enter into certain sale/leaseback transactions and enter into certain merger or consolidation transactions.

Debentures Due 2027

During 1997, Ensco Delaware issued $150.0 million of unsecured 7.20% Debentures due November 15, 2027 (the "Debentures") in a public offering. Interest on the Debentures is payable semiannually in May and November. We may redeem the Debentures, in whole or in part, at any time prior to maturity, at a price equal to 100% of their principal amount, plus accrued and unpaid interest and a "make-whole" premium. The Debentures are not subject to any sinking fund requirements. During 2009, in connection with the redomestication, Ensco plc entered into a supplemental indenture to unconditionally guarantee the principal and interest payments on the Debentures.

The Debentures and the indenture and the supplemental indentures pursuant to which the Debentures were issued, also contain customary events of default, including failure to pay principal or interest on the Debentures when due, among others. The indenture and the supplemental indentures contain certain restrictions, including, among others, restrictions on our ability and the ability of our subsidiaries to create or incur secured indebtedness, enter into certain sale/leaseback transactions and enter into certain merger or consolidation transactions.

MARAD Bonds Due 2016 and 2020

During 2001, a subsidiary of Ensco Delaware issued $190.0 million of 15-year bonds which are guaranteed by MARAD to provide long-term financing for ENSCO 7500. In December 2014, we fully redeemed the remaining outstanding principal of these bonds and incurred a "make-whole" payment of $600,000, and MARAD released all interests in ENSCO 7500.

During 2003, a subsidiary of Ensco Delaware issued $76.5 million of 17-year bonds which are guaranteed by MARAD to provide long-term financing for ENSCO 105. The bonds will be repaid in 34 equal semiannual principal installments of $2.3 million ending in October 2020. Interest on the bonds is payable semiannually, in April and October, at a fixed rate of 4.65%.

Ensco Delaware issued separate guaranties to MARAD, guaranteeing the performance of obligations under the bonds.  During 2010, the documents governing MARAD's guarantee commitments were amended to address certain changes arising from the redomestication and to include Ensco plc as an additional guarantor of the debt obligations of Ensco Delaware and its subsidiaries.

Upon consummation of the Pride acquisition, we assumed $151.5 million of MARAD bonds issued to provide long-term financing for ENSCO 6003 and ENSCO 6004. The bonds are guaranteed by MARAD and will be repaid in semiannual principal installments ending in 2016. Interest on the bonds is payable semiannually at a weighted average fixed rate of 4.33%.

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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. During 2014, we increased the size of our program to permit the issuance of commercial paper notes in an aggregate principal amount not to exceed $2.25 billion at any time outstanding. Amounts issued under the commercial paper program are supported by the available and unused committed capacity under our credit facility. As a result, amounts issued under the commercial paper program are limited by the amount of our available and unused committed capacity under our credit facility. The proceeds of such financings may be used for capital expenditures and other general corporate purposes. The commercial paper bears interest at rates that vary based on market conditions and the ratings assigned by credit rating agencies at the time of issuance. The weighted-average interest rate on our commercial paper borrowings was 0.26% and 0.35% during 2014 and 2013, respectively.  Commercial paper maturities will vary but may not exceed 364 days from the date of issue. The commercial paper is not redeemable or subject to voluntary prepayment by us prior to maturity.  We had no amounts outstanding under our commercial paper program as of December 31, 2014 and 2013.

Revolving Credit Facility

On September 30, 2014, we entered into an amendment to the Fourth Amended and Restated Credit Agreement (the "Five-Year Credit Facility"), among Ensco, Citibank, N.A., as Administrative Agent, DNB Bank ASA, as Syndication Agent, and a syndicate of banks. This amendment extended the Five-Year Credit Facility maturity date from May 7, 2018 to September 30, 2019 and increased the total commitment of the lenders from $2.0 billion to $2.25 billion. As amended, the Five-Year Credit Facility provides for a $2.25 billion senior unsecured revolving credit facility to be used for general corporate purposes.

Advances under the Five-Year Credit Facility bear interest at Base Rate or LIBOR plus an applicable margin rate (currently 0.125% per annum for Base Rate advances and 1.125% per annum for LIBOR advances) depending on our credit rating. Amounts repaid may be re-borrowed during the term of the Five-Year Credit Facility. We are required to pay a quarterly commitment fee (currently 0.125% per annum) on the undrawn portion of the $2.25 billion commitment which is also based on our credit rating. In addition to other customary restrictive covenants, the Five-Year Credit Facility requires us to maintain a total debt to total capitalization ratio of less than or equal to 50%. We have the right, subject to receipt of commitments from new or existing lenders, to increase the commitments under the Five-Year Credit Facility to an aggregate amount of up to $2.75 billion. We had no amounts outstanding under the Five-Year Credit Facility as of December 31, 2014 and 2013.

Maturities

The aggregate maturities of our debt, excluding net unamortized premiums of $247.9 million, as of December 31, 2014 were as follows (in millions):

2015	$	34.8
2016	1,019.7
2017	4.5
2018	4.5
2019	504.5
Thereafter	4,104.5
Total	$	5,672.5

Interest expense totaled $161.4 million, $158.8 million and $123.6 million for the years ended December 31, 2014, 2013 and 2012, respectively, which was net of interest amounts capitalized of $78.2 million, $67.7 million and $105.8 million in connection with our newbuild rig construction and other capital projects.  

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5.  DERIVATIVE INSTRUMENTS

We use derivatives to reduce our exposure to various market risks, primarily foreign currency exchange rate risk. 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 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 entering into International Swaps and Derivatives Association, Inc. (“ISDA”) Master Agreements, which include provisions for a legally enforceable master netting agreement, with almost all of our derivative counterparties. See "Note 14 - Supplemental Financial Information" for additional information on the mitigation of credit risk relating to counterparties of our derivatives. We do not enter into derivatives for trading or other speculative purposes.

All derivatives were recorded on our consolidated balance sheets at fair value. Derivatives subject to legally enforceable master netting agreements were not offset on our consolidated balance sheets. 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. See "Note 1 - Description of the Business and Summary of Significant Accounting Policies" for additional information on our accounting policy for derivatives and "Note 2 - Fair Value Measurements" for additional information on the fair value measurement of our derivatives.

As of December 31, 2014 and 2013, our consolidated balance sheets included net foreign currency derivative liabilities of $26.3 million and net assets of $1.8 million, respectively.  All of our derivatives mature during the next 18 months.  

Derivatives recorded at fair value on our consolidated balance sheets as of December 31, 2014 and 2013 consisted of the following (in millions):

	Derivative Assets				Derivative Liabilities
	2014		2013		2014		2013
Derivatives Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	$	.4	$	9.1	$	17.2	$	9.8
Foreign currency forward contracts - non-current(2)	.1		1.2		2.9		.6
	.5		10.3		20.1		10.4
Derivatives not Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	.2		2.5		6.9		.6
	.2		2.5		6.9		.6
Total	$	.7	$	12.8	$	27.0	$	11.0

⁽¹⁾  Derivative assets and liabilities that have maturity dates equal to or less than 12 months from the respective balance sheet dates were included in other current assets and accrued liabilities and other, respectively, on our consolidated balance sheets.

⁽²⁾  Derivative assets and liabilities that have maturity dates greater than 12 months from the respective balance sheet dates were included in other assets, net, and other liabilities, respectively, on our 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 December 31, 2014, we had cash flow hedges outstanding to exchange an aggregate $373.1 million for various foreign currencies, including $194.3 million for British pounds, $81.2 million for Brazilian reais, $35.5 million for Euros, $28.5 million for Singapore dollars, $20.1 million for Australian dollars and $13.5 million for other currencies.

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Gains and losses, net of tax, on derivatives designated as cash flow hedges included in our consolidated statements of operations and comprehensive income for each of the years in the three-year period ended December 31, 2014 were as follows (in millions):

	(Loss) Gain Recognized in Other Comprehensive Income ("OCI") on Derivatives   (Effective Portion)								(Loss) Gain Reclassified from  AOCI into Income (Effective Portion)(1)									Loss Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(2)
	2014			2013			2012		2014			2013			2012			2014			2013			2012
Interest rate lock contracts(3)	$	—		$	—		$	—	$	(.4	)	$	(.4	)	$	(.5	)	$	—		$	—		$	—
Foreign currency forward contracts(4)	(11.7		)	(5.8		)	8.7		1.3			(1.6		)	.5			(.7		)	(.3		)	(.3		)
Total	$	(11.7	)	$	(5.8	)	$	8.7	$	.9		$	(2.0	)	$	—		$	(.7	)	$	(.3	)	$	(.3	)

⁽¹⁾ Changes in the fair value of cash flow hedges are recorded in AOCI.  Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction.

⁽²⁾  Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our consolidated statements of operations.

⁽³⁾  Losses on interest rate lock derivatives reclassified from AOCI into income (effective portion) were included in interest expense, net in our consolidated statements of operations.

⁽⁴⁾  During the year ended December 31, 2014, $400,000 of gains were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations. During the year ended December 31, 2013, $2.5 million of losses were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations.

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 December 31, 2014, we held derivatives not designated as hedging instruments to exchange an aggregate $207.5 million for various foreign currencies, including $98.9 million for Euros, $36.1 million for British pounds, $31.1 million for Swiss francs, $10.3 million for Indonesian Rupiah, $8.6 million for Brazilian reais and $22.5 million for other currencies.

Net losses of $24.8 million and net gains of $3.6 million and $1.5 million associated with our derivatives not designated as hedging instruments were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.

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As of December 31, 2014, the estimated amount of net losses associated with derivatives, net of tax, that will be reclassified to earnings during the next 12 months was as follows (in millions):

Net unrealized losses to be reclassified to contract drilling expense	$	(9.4	)
Net realized gains to be reclassified to depreciation expense	.9
Net realized losses to be reclassified to interest expense	(.4		)
Net losses to be reclassified to earnings	$	(8.9	)

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6.  SHAREHOLDERS' EQUITY

Activity in our various shareholders' equity accounts for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	Shares	Par Value		Additional Paid-in Capital			Retained Earnings			AOCI			Treasury Shares			Noncontrolling Interest
BALANCE, December 31, 2011	235.9	$	23.7	$	5,253.0		$	5,613.1		$	8.6		$	(19.1	)	$	5.2
Net income	—	—		—			1,169.7			—			—			7.0
Dividends paid	—	—		—			(348.1		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(6.5		)
Shares issued under share-based compensation plans, net	1.8	.2		35.3			—			—			(.1		)	—
Equity issuance costs	—	—		66.7			—			—			—			—
Tax deficiency from share-based compensation	—	—		(1.0		)	—			—			—			—
Repurchase of shares	—	—		—			—			—			(11.8		)	—
Share-based compensation cost	—	—		44.7			—			—			—			—
Net other comprehensive income	—	—		—			—			11.5			—			—
BALANCE, December 31, 2012	237.7	23.9		5,398.7			6,434.7			20.1			(31.0		)	5.7
Net income	—	—		—			1,418.2			—			—			9.7
Dividends paid	—	—		—			(525.6		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(8.1		)
Shares issued in connection with share-based compensation plans, net	1.9	.2		21.8			—			—			(.1		)	—
Tax benefit from share-based compensation	—	—		.1			—			—			—			—
Repurchase of shares	—	—		—			—			—			(14.1		)	—
Share-based compensation cost	—	—		46.6			—			—			—			—
Net other comprehensive loss	—	—		—			—			(1.9		)	—			—
BALANCE, December 31, 2013	239.6	24.1		5,467.2			7,327.3			18.2			(45.2		)	7.3
Net (loss) income	—	—		—			(3,902.6		)	—			—			14.1
Dividends paid	—	—		—			(704.3		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(13.5		)
Shares issued in connection with share-based compensation plans, net	1.1	.1		.4			—			—			(.1		)	—
Tax benefit from share-based compensation	—	—		1.2			—			—			—			—
Repurchase of shares	—	—		—			—			—			(13.7		)	—
Share-based compensation cost	—	—		48.7			—			—			—			—
Net other comprehensive loss	—	—		—			—			(6.3		)	—			—
BALANCE, December 31, 2014	240.7	$	24.2	$	5,517.5		$	2,720.4		$	11.9		$	(59.0	)	$	7.9

During 2013, our shareholders approved a new share repurchase program. Subject to certain provisions under English law, including the requirement of Ensco plc to have sufficient distributable reserves, we may purchase up to a maximum of $2.0 billion in the aggregate under the program, but in no case more than 35.0 million shares. The program terminates during 2018. As of December 31, 2014, there had been no share repurchases under this program.

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7.  BENEFIT PLANS

Our shareholders approved the 2012 Long-Term Incentive Plan (the “2012 LTIP”) effective January 1, 2012, to provide for the issuance of non-vested share awards, share option awards and performance awards (collectively "awards"). Under the 2012 LTIP, 14.0 million shares were reserved for issuance as awards to officers, non-employee directors and key employees who are in a position to contribute materially to our growth, development and long-term success. As of December 31, 2014, there were 7.7 million shares available for issuance as awards under the 2012 LTIP. Awards may be satisfied by newly issued shares, including shares held by a subsidiary or affiliated entity, or by delivery of shares held in an affiliated employee benefit trust at the Company's discretion.

Non-Vested Share Awards

Grants of non-vested share awards generally vest at rates of 20% or 33% per year, as determined by a committee or subcommittee of the Board of Directors at the time of grant. Our non-vested share awards have voting and dividend rights effective on the date of grant. Compensation expense is measured using the market value of our shares on the date of grant and is recognized on a straight-line basis over the requisite service period (usually the vesting period).

The following table summarizes non-vested share award related compensation expense recognized during each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Contract drilling	$	20.9		$	21.3		$	17.1
General and administrative	20.7			21.6			24.8
Non-vested share award related compensation expense included in operating expenses	41.6			42.9			41.9
Tax benefit	(5.1		)	(5.4		)	(7.0		)
Total non-vested share award related compensation expense included in net income	$	36.5		$	37.5		$	34.9

The following table summarizes the value of non-vested share awards granted and vested during each of the years in the three-year period ended December 31, 2014:

	2014		2013		2012
Weighted-average grant-date fair value of   non-vested share awards granted (per share)	$	51.22	$	59.79	$	48.32
Total fair value of non-vested share awards   vested during the period (in millions)	$	46.2	$	49.6	$	42.5

The following table summarizes non-vested share award activity for the year ended December 31, 2014 (shares in thousands): 

	Shares		Weighted-Average Grant-Date Fair Value
Non-vested share awards as of December 31, 2013	2,496		$	52.95
Granted	1,242		51.22
Vested	(898	)	51.07
Forfeited	(199	)	53.80
Non-vested share awards as of December 31, 2014	2,641		$	52.86

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As of December 31, 2014, there was $100.7 million of total unrecognized compensation cost related to non-vested share awards, which is expected to be recognized over a weighted-average period of 2.1 years.

Share Option Awards

Share option awards ("options") granted to officers and employees generally become exercisable in 25% increments over a four-year period or 33% increments over a three-year period and, to the extent not exercised, expire on the seventh anniversary of the date of grant. Options granted to non-employee directors are immediately exercisable and, to the extent not exercised, expire on the seventh anniversary of the date of grant. The exercise price of options granted under the 2012 LTIP equals the market value of the underlying shares on the date of grant. As of December 31, 2014, options granted to purchase 472,000 shares with a weighted average exercise price of $41.09 were outstanding under the 2012 LTIP and predecessor or acquired plans. No options have been granted since 2011, and there were no unrecognized compensation costs related to options as of December 31, 2014.

Performance Awards

Under the 2012 LTIP, performance awards may be issued to our senior executive officers. Performance awards granted prior to 2013 are payable in Ensco shares, cash or a combination thereof upon attainment of specified performance goals based on relative total shareholder return ("TSR") and absolute and relative return on capital employed ("ROCE"). Performance awards granted during 2013 and 2014 are payable in Ensco shares upon attainment of specified performance goals based on relative TSR and relative ROCE. The performance goals are determined by a committee or subcommittee of the Board of Directors.

Performance awards generally vest at the end of a three-year measurement period based on attainment of performance goals. Our performance awards granted prior to 2013 are classified as liability awards with compensation expense measured based on the estimated probability of attainment of the specified performance goals and recognized on a straight-line basis over the requisite service period. The estimated probable outcome of attainment of the specified performance goals is based on historical experience, and any subsequent changes in this estimate are recognized as a cumulative adjustment to compensation cost in the period in which the change in estimate occurs.

Our performance awards granted during 2013 and 2014 are classified as equity awards with compensation expense recognized on a straight-line basis over the requisite service period. The estimated probable outcome of attainment of the specified performance goals is based on historical experience, and any subsequent changes in this estimate for the relative ROCE performance goal are recognized as a cumulative adjustment to compensation cost in the period in which the change in estimate occurs.

The aggregate grant-date fair value of performance awards granted during 2014, 2013 and 2012 totaled $7.4 million, $8.2 million and $7.2 million, respectively. The aggregate fair value of performance awards vested during 2014, 2013 and 2012 totaled $6.9 million, $7.4 million and $5.3 million, respectively, all of which was paid in cash.

During the years ended December 31, 2014, 2013 and 2012, we recognized $3.4 million, $6.6 million and $9.7 million of compensation expense for performance awards, respectively, which was included in general and administrative expense in our consolidated statements of operations.  As of December 31, 2014, there was $5.0 million of total unrecognized compensation cost related to unvested performance awards, which is expected to be recognized over a weighted-average period of 1.9 years.

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Savings Plans

We have profit sharing plans (the "Ensco Savings Plan," the "Ensco Multinational Savings Plan" and the "Ensco Limited Retirement Plan"), which cover eligible employees, as defined within each plan.  The Ensco Savings Plan includes a 401(k) savings plan feature which allows eligible employees to make tax deferred contributions to the plan.  The Ensco Limited Retirement Plan also allows eligible employees to make tax deferred contributions to the plan. Contributions made to the Ensco Multinational Savings Plan may or may not qualify for tax deferral based on each plan participant's local tax requirements.

We generally make matching cash contributions to the plans.  We match 100% of the amount contributed by the employee up to a maximum of 5% of eligible salary. Matching contributions totaled $20.7 million, $21.1 million and $16.5 million for the years ended December 31, 2014, 2013 and 2012, respectively.  Profit sharing contributions made into the plans require approval of the Board of Directors and are generally paid in cash.  We recorded profit sharing contribution provisions of $30.7 million, $55.3 million and $45.1 million for the years ended December 31, 2014, 2013 and 2012, respectively.  Matching contributions and profit sharing contributions become vested in 33% increments upon completion of each initial year of service with all contributions becoming fully vested subsequent to achievement of three or more years of service.  We have 1.0 million shares reserved for issuance as matching contributions under the Ensco Savings Plan.

8.  GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES

Goodwill

The carrying amount of goodwill as of December 31, 2014 is detailed below by reporting unit (in millions):

	December 31, 2014								December 31, 2013
	Gross Carrying Amount		Accumulated Impairment Losses			Net Carrying Amount			Gross Carrying Amount		Accumulated Impairment Losses		Net Carrying Amount
Floaters
Balance, beginning of period	$	3,081.4	$	—		$	3,081.4		$	3,081.4	$	—	$	3,081.4
Loss on impairment	—		(2,997.9		)	(2,997.9		)	—		—		—
Balance, end of period	$	3,081.4	$	(2,997.9	)	$	83.5		$	3,081.4	$	—	$	3,081.4
Jackups
Balance, beginning of period	$	192.6	$	—		$	192.6		$	192.6	$	—	$	192.6
Loss on impairment	—		—			—			—		—		—
Balance, end of period	$	192.6	$	—		$	192.6		$	192.6	$	—	$	192.6

Impairment of Goodwill

Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

We test goodwill for impairment on an annual basis or when events or changes in circumstances indicate that a potential impairment exists.  During the second quarter, demand for floaters deteriorated as a result of a continued reduction in capital spending by operators in addition to announced delays in operators’ drilling programs. The reduction in demand, combined with increasing supply from newbuild floater deliveries, led to a very competitive market. In

general, contracting activity for floaters declined significantly and day rates and utilization came under pressure, especially for older, less capable floaters.

Management considered the adverse change in the floater business climate, the commitment to a plan to sell five floaters in May 2014, and the impairment charge on the "held for sale" floaters during the second quarter and concluded that a triggering event had occurred. We performed an interim goodwill impairment test to evaluate the recoverability of the Floaters reporting unit goodwill balance of $3.1 billion as of May 31, 2014. Based on the valuation performed, the Floaters reporting unit estimated fair value exceeded the carrying value by approximately 7%; therefore, we concluded that the goodwill balance was not impaired.  

As part of our annual goodwill impairment test as of December 31, 2014, we considered the significant decline in commodity prices during the fourth quarter of 2014. Specifically, Brent crude oil prices declined from approximately $95 per barrel at September 30, 2014 to near $55 per barrel at December 31, 2014. These declines resulted in further reductions in capital spending by operators, including the cancellation or deferral of planned drilling programs. We expect that this reduction in demand will cause further deterioration in day rates and utilization and that current market dynamics will create a challenging contracting environment into 2016.

Our stock price also declined significantly during the latter half of 2014, reaching a five-year low of $25.88 on December 16th. Our stock price traded between $25.88 and $41.99 during the fourth quarter of 2014 and averaged $35.23 during this period.

Management considered the adverse changes in the current floater business climate, the sustained decline in stock price and the impairment charge on older, less capable floaters during the fourth quarter and concluded it was more-likely-than-not that the fair value of the Floater reporting unit was less than its carrying amount. As a result, we estimated the fair value of the reporting unit using a blended income and market approach. Based on the valuation performed as of December 31, 2014, the reporting unit estimated fair value was less than the carrying value; therefore, we concluded that the Floater goodwill balance was impaired.  We compared the estimated fair value of the reporting unit to the fair value of all assets and liabilities of the reporting unit to calculate the implied fair value of goodwill. As a result, we recorded a non-cash loss on impairment totaling $3.0 billion which was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014.

The income approach was based on a discounted cash flow model, which utilized present values of cash flows to estimate fair value. The future cash flows were projected based on our estimates of future day rates, utilization, operating costs, capital requirements, growth rates and terminal values. Forecasted day rates and utilization take into account current market conditions and our anticipated business outlook, both of which have been impacted by the adverse changes in the floater business environment during 2014. The day rates reflected contracted rates during the respective contracted periods and management's estimate of market day rates in uncontracted periods. The forecasted market day rates were held constant in the near-term but were forecasted to grow in the longer-term and terminal period.

Operating costs were forecasted using a combination of our historical average operating costs and expected future costs, adjusted for an estimated inflation factor. Capital requirements in the discounted cash flow model were based on management's estimates of future capital costs, taking into consideration our historical trends. The estimated capital requirements included cash outflows for new rig construction, rig enhancements and minor upgrades and improvements.

A terminal period was used to reflect our estimate of stable, perpetual growth. The terminal period reflects a terminal growth rate of 3.0%, which includes an estimated inflation factor. The future cash flows were discounted using a market-participant risk-adjusted weighted average cost of capital ("WACC") of 11.0%. These assumptions were derived from unobservable inputs and reflect management's judgments and assumptions.

The market approach was based upon the application of price-to-earnings multiples to management's estimates of future earnings adjusted for a control premium. The price-to-earnings multiples used in the market valuation ranged from 6.0x to 6.8x and were based on market participant multiples. Management's earnings estimates were derived

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from unobservable inputs that require significant estimates, judgments and assumptions as described in the income approach.

The estimated fair value of the Floaters reporting unit determined under the income approach was consistent with the estimated fair value determined under the market approach. For purposes of the goodwill impairment test, we calculated the Floaters reporting unit estimated fair value as the average of the values calculated under the income approach and the market approach.

We evaluated the estimated fair value of our reporting units compared to our market capitalization as of December 31, 2014. To perform this assessment, we used a market approach to estimate the fair value of the Jackups reporting unit. The aggregate fair values of our reporting units exceeded our market capitalization, and we believe the resulting implied control premium was reasonable based on recent market transactions within our industry or other relevant benchmark data.

We performed a qualitative assessment for our Jackup reporting unit as of December 31, 2014. Goodwill impairment tests performed during prior years indicated that the fair value of the Jackup reporting unit significantly exceeded its carrying amount. Despite the adverse changes in the offshore drilling climate, we concluded that the fair value remains substantially in excess of the carrying value of the reporting unit, as evidenced by the estimated fair value of the Jackup reporting unit calculated for the purpose of reconciling the fair value of our reporting units to our market capitalization. Therefore, we concluded that it remains more-likely-than-not that the Jackup reporting unit was not impaired.

The estimates used to determine the fair value of the Floaters reporting unit reflect management's best estimates, and we believe they are reasonable. Future declines in the Floaters reporting unit's operating performance or our anticipated business outlook may reduce the estimated fair value of our Floaters reporting unit and result in additional impairments. Factors that could have a negative impact on the fair value of the Floaters reporting unit include, but are not limited to:

• decreases in estimated market day rates and utilization due to greater-than-expected market pressures, downtime and other risks associated with offshore rig operations;

• sustained declines in our stock price;

• decreases in revenue due to our inability to attract and retain skilled personnel;

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

• 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;

• possible cancellation or suspension of drilling contracts as a result of mechanical difficulties, performance or other reasons;

• delays in contract commencement dates;

• the outcome of litigation, legal proceedings, investigations or other claims or contract disputes resulting in significant cash outflows;

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

• increases in the market-participant risk-adjusted WACC;

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• declines in anticipated growth rates.

Adverse changes in one or more of these factors could result in additional goodwill impairments in future periods.

Drilling Contract Intangibles

In connection with the Pride acquisition, we recorded intangible assets and liabilities representing the estimated fair values of the acquired company's firm drilling contracts in place at the date of acquisition with favorable or unfavorable contract terms as compared to then-current market day rates for comparable drilling rigs.

The gross carrying amounts of our drilling contract intangibles, which we consider to be definite-lived intangibles assets and intangible liabilities, and accumulated amortization as of December 31, 2014 and 2013 were as follows (in millions):

	December 31, 2014								December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount			Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Drilling contract intangible assets
Balance, beginning of period	$	209.0	$	(130.6	)	$	78.4		$	209.0	$	(88.3	)	$	120.7
Amortization	—		(32.7		)	(32.7		)	—		(42.3		)	(42.3		)
Balance, end of period	$	209.0	$	(163.3	)	$	45.7		$	209.0	$	(130.6	)	$	78.4
Drilling contract intangible liabilities
Balance, beginning of period	$	278.0	$	(208.9	)	$	69.1		$	278.0	$	(160.0	)	$	118.0
Amortization	—		(28.4		)	(28.4		)	—		(48.9		)	(48.9		)
Balance, end of period	$	278.0	$	(237.3	)	$	40.7		$	278.0	$	(208.9	)	$	69.1

The various factors considered in the determination of the fair values of our drilling contract intangibles were (1) the contracted day rate for each contract, (2) the remaining term of each contract, (3) the rig class and (4) the market conditions for each respective rig class at the date of acquisition.  The intangible assets and liabilities were calculated based on the present value of the difference in cash inflows over the remaining contract term as compared to a hypothetical contract with the same remaining term at an estimated then-current market day rate using a risk-adjusted discount rate and an estimated effective income tax rate.  

We amortize the drilling contract intangibles to operating revenues over the respective remaining drilling contract terms on a straight-line basis. The estimated net (reduction) increase to future operating revenues related to the amortization of these intangible assets and liabilities as of December 31, 2014, is as follows (in millions):

2015	$	(4.5	)
2016	(.8		)
2017	.3
Total	$	(5.0	)

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9.  INCOME TAXES

We generated loss of $460.3 million, income of $173.4 million and $101.1 million from continuing operations before income taxes in the U.S. and loss of $2.1 billion, income of $1.5 billion and $1.2 billion from continuing operations before income taxes in non-U.S. countries for the years ended December 31, 2014, 2013 and 2012, respectively.

The following table summarizes components of the provision for income taxes from continuing operations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Current income tax expense:
U.S.	$	114.8		$	94.4		$	46.6
Non-U.S.	149.2			98.6			154.2
	264.0			193.0			200.8
Deferred income tax expense (benefit):
U.S.	(86.7		)	19.2			29.4
Non-U.S.	(36.8		)	(9.1		)	(1.6		)
	(123.5		)	10.1			27.8
Total income tax expense	$	140.5		$	203.1		$	228.6

Deferred Taxes

The following table summarizes significant components of deferred income tax assets (liabilities) as of December 31, 2014 and 2013 (in millions):

	2014			2013
Deferred tax assets:
Net operating loss carryforwards	$	204.5		$	104.0
Deferred revenue	103.0			19.4
Premium on long-term debt	99.2			111.9
Foreign tax credits	98.6			159.0
Employee benefits, including share-based compensation	39.5			41.7
Other	16.7			19.8
Total deferred tax assets	561.5			455.8
Valuation allowance	(271.3		)	(232.6		)
Net deferred tax assets	290.2			223.2
Deferred tax liabilities:
Property and equipment	(314.2		)	(453.6		)
Intercompany transfers of property	(23.0		)	(29.2		)
Deferred costs	(20.2		)	(11.4		)
Other	(14.1		)	(24.0		)
Total deferred tax liabilities	(371.5		)	(518.2		)
Net deferred tax liability	$	(81.3	)	$	(295.0	)
Net current deferred tax asset	$	41.4		$	20.9
Net noncurrent deferred tax liability	(122.7		)	(315.9		)
Net deferred tax liability	$	(81.3	)	$	(295.0	)

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The realization of substantially all of our deferred tax assets is dependent on generating sufficient taxable income during future periods in various jurisdictions in which we operate. Realization of certain of our deferred tax assets is not assured. We recognize a valuation allowance for deferred tax assets when it is more-likely-than-not that the benefit from the deferred tax asset will not be realized. The amount of deferred tax assets considered realizable could increase or decrease in the near-term if our estimates of future taxable income change.

As of December 31, 2014, we had deferred tax assets of $98.6 million for U.S. foreign tax credits (“FTC”) and $204.5 million related to $814.5 million of net operating loss (“NOL”) carryforwards, which can be used to reduce our income taxes payable in future years.  The FTC expire between 2017 and 2023.  NOL carryforwards, which were generated in various jurisdictions worldwide, include $459.5 million that do not expire and $355.0 million that will expire, if not utilized, beginning in 2015 through 2020.  Due to the uncertainty of realization, we have a $267.5 million valuation allowance on FTC and NOL carryforwards, primarily relating to countries where we no longer operate or do not expect to generate future taxable income.

Effective Tax Rate

     Ensco plc, our parent company, is domiciled and resident in the U.K. Our subsidiaries conduct operations and earn income in numerous countries and are subject to the laws of taxing jurisdictions within those countries. The income of our non-U.K. subsidiaries is not subject to U.K. taxation. As a result of frequent changes in the taxing jurisdictions in which our drilling rigs are operated and/or owned, changes in the overall level of our income and changes in tax laws, our consolidated effective income tax rate may vary substantially from one reporting period to another. Our consolidated effective income tax rate on continuing operations for each of the years in the three-year period ended December 31, 2014, differs from the U.K. statutory income tax rate as follows:

	2014		2013		2012
U.K. statutory income tax rate	21.5	%	23.3	%	24.5	%
Goodwill impairment	(25.3	)	—		—
Assets impairment	(10.9	)	—		—
Non-U.K. taxes	9.6		(13.2	)	(17.5	)
Valuation allowance	(1.1	)	1.0		5.0
Income taxes associated with restructuring transactions	—		—		3.9
Other	.7		1.3		1.6
Effective income tax rate	(5.5	)%	12.4	%	17.5	%

Our consolidated effective income tax rate for 2014 includes the impact of various discrete tax items, including the recognition of a net $18.4 million tax expense associated with liabilities for unrecognized tax benefits and other adjustments relating to prior years, and a $16.4 million tax benefit associated with rig impairments. In addition, we recognized a net $41.4 million tax benefit in connection with the utilization of foreign tax credits that were previously subject to a valuation allowance.

The majority of discrete tax expense recognized during 2013 was attributable to the recognition of a $7.4 million liability for taxes associated with a $30.6 million reimbursement from the resolution of a dispute with the Mexican tax authority and a $7.0 million increase in the valuation allowance on U.S. foreign tax credits resulting from a restructuring transaction in December 2013.

The majority of discrete tax expense recognized during 2012 was attributable to $51.2 million of income tax expense associated with the restructuring of certain subsidiaries of Pride in December 2012, and tax expense associated with liabilities for unrecognized tax benefits and other adjustments relating to prior years.

Excluding the impact of the aforementioned tax items and goodwill and asset impairments, our consolidated effective income tax rates for the years ended December 31, 2014, 2013 and 2012 were 10.7%, 12.2% and 12.4%, respectively. The changes in our consolidated effective income tax rate excluding discrete tax items during the three

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years result primarily from changes in the relative components of our earnings from the various taxing jurisdictions in which our drilling rigs are operated and/or owned and the differences in the tax rates in such tax jurisdictions.

Unrecognized Tax Benefits

Our tax positions are evaluated for recognition using a more-likely-than-not threshold, and those tax positions requiring recognition are measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon effective settlement with a taxing authority that has full knowledge of all relevant information.  As of December 31, 2014, we had $134.4 million of unrecognized tax benefits, of which $115.9 million was included in other liabilities on our consolidated balance sheet and the remaining $18.5 million, which is associated with a tax position taken in tax years with NOL carryforwards, was presented as a reduction of deferred tax assets. As of December 31, 2013, we had $151.7 million of unrecognized tax benefits, of which $130.7 million was included in other liabilities on our consolidated balance sheet and the remaining $21.0 million was presented as a reduction of deferred tax assets. If recognized, $110.4 million of our unrecognized tax benefits would impact our consolidated effective income tax rate. A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2014 and 2013 is as follows (in millions):

	2014			2013
Balance, beginning of year	$	151.7		$	110.7
Increases in unrecognized tax benefits as a result       of tax positions taken during prior years	16.3			35.8
Increases in unrecognized tax benefits as a result       of tax positions taken during the current year	5.5			10.0
Decreases in unrecognized tax benefits as a result       of tax positions taken during prior years	(15.5		)	(3.7		)
Settlements with taxing authorities	(14.2		)	—
Lapse of applicable statutes of limitations	(.7		)	(1.1		)
Impact of foreign currency exchange rates	(8.7		)	—
Balance, end of year	$	134.4		$	151.7

Accrued interest and penalties totaled $26.5 million and $17.3 million as of December 31, 2014 and 2013, respectively, and were included in other liabilities on our consolidated balance sheets. We recognized net expense of $9.2 million, benefits $1.6 million and $2.8 million associated with interest and penalties during the years ended December 31, 2014, 2013 and 2012, respectively. Interest and penalties are included in current income tax expense in our consolidated statements of operations.

Tax years as early as 2004 remain subject to examination in the major tax jurisdictions in which we operated. Ensco Delaware and Ensco United Incorporated, an indirect wholly-owned subsidiary of Ensco, participate in the U.S. Internal Revenue Service’s Compliance Assurance Process ("IRS CAP") which, among other things, provides for the resolution of tax issues in a timely manner and generally eliminates the need for lengthy post-filing examinations. The 2010, 2011, 2012 and 2013 U.S. federal tax returns of Ensco Delaware remain subject to examination under the IRS CAP.

Statutes of limitations applicable to certain of our tax positions lapsed during 2014, 2013 and 2012, resulting in net income tax benefits, inclusive of interest and penalties, of $2.4 million, $3.1 million and $28.6 million, respectively.

Statutes of limitations applicable to certain of our tax positions will lapse during 2015.  Therefore, it is reasonably possible that our unrecognized tax benefits will decline during the next 12 months by $9.6 million, inclusive of $2.8 million of accrued interest and penalties, all of which would impact our consolidated effective income tax rate if recognized.

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Intercompany Transfer of Drilling Rigs

During the three-year period ended December 31, 2014, we transferred ownership of certain drilling rigs among our subsidiaries, including three jackup rigs during 2014, two semisubmersible rigs during 2013 and one jackup rig during 2012.  There was no income tax liability associated with the intercompany transfers of drilling rigs during 2014 and 2013. A $1.7 million income tax liability resulted from the gain on the intercompany transfer of the jackup rig in 2012. The related income tax expense was deferred and is being amortized on a straight-line basis over the 15-year remaining useful life of the rig. There were no temporary differences associated with any of the intercompany transfers of drilling rigs during the three-year period ended December 31, 2014

As of December 31, 2014 and 2013, the unamortized balance associated with deferred charges for income taxes incurred in connection with intercompany transfers of drilling rigs totaled $39.7 million and $50.2 million, respectively, and was included in other assets, net, on our consolidated balance sheets. Current income tax expense for the years ended December 31, 2014, 2013 and 2012 included $2.6 million, $4.1 million and $9.1 million, respectively, of amortization of income taxes incurred in connection with intercompany transfers of drilling rigs.

As of December 31, 2014 and 2013, the unamortized balance associated with the deferred tax liability for reversing temporary differences of transferred drilling rigs totaled $23.0 million and $29.2 million, respectively, and was included in deferred income taxes on our consolidated balance sheets.  Deferred income tax benefit for the year ended December 31, 2014 and deferred income tax expense for the years ended December 31, 2013 and 2012 included benefits of $4.8 million, $1.9 million and $3.4 million, respectively, of amortization of deferred reversing temporary differences associated with intercompany transfers of drilling rigs.

Undistributed Earnings

Dividend income received by Ensco plc from its subsidiaries is exempt from U.K. taxation. We do not provide deferred taxes on undistributed earnings of certain subsidiaries because our policy and intention is to reinvest such earnings indefinitely. Each of the subsidiaries for which we maintain such policy has significant net assets, liquidity, contract backlog and/or other financial resources available to meet operational and capital investment requirements and otherwise allow us to continue to maintain our policy of reinvesting the undistributed earnings indefinitely.

In December 2012, a U.S. subsidiary received $530.0 million in earnings distributions from two non-U.S. subsidiaries. There was no net U.S. tax liability on the earnings repatriation, as we utilized net operating loss carryforwards to offset the previously untaxed portion of the earnings distribution. The earnings distribution was made in consideration of unique circumstances, and our U.S. subsidiaries continue to have significant net assets, liquidity, contract backlog and other financial resources available to meet operational and capital investment requirements. Accordingly, this distribution did not change, and we continue to maintain, our policy and intention to reinvest the undistributed earnings of the two aforementioned subsidiaries indefinitely.

As of December 31, 2014 and 2013, the aggregate undistributed earnings of the subsidiaries for which we maintain a policy and intention to reinvest earnings indefinitely totaled $2.3 billion and $2.1 billion, respectively. Should we make a distribution from these subsidiaries in the form of dividends or otherwise, we would be subject to additional income taxes. The unrecognized deferred tax liability related to these undistributed earnings was not practicable to estimate as of December 31, 2014.

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10.  DISCONTINUED OPERATIONS

We sold the following rigs during the three-year period ended December 31, 2014 (in millions):

Rig(3)	Date of Rig Sale	Segment(1)	Net Proceeds		Net Book Value(2)		Pre-tax Gain/(Loss)
ENSCO 5000	December 2014	Floaters	$	1.3	$	.5	$	.8
ENSCO 93	September 2014	Jackups	51.7		52.9		(1.2		)
ENSCO 85	April 2014	Jackups	64.4		54.1		10.3
ENSCO 69 & Pride Wisconsin	January 2014	Jackups	32.2		8.6		23.6
Pride Pennsylvania	March 2013	Jackups	15.5		15.7		(.2		)
ENSCO 5003	December 2012	Floaters	68.2		89.4		(21.2		)
Pride Hawaii	October 2012	Jackups	18.8		16.8		2.0
ENSCO I	September 2012	Other	4.5		12.3		(7.8		)
ENSCO 61	June 2012	Jackups	31.7		19.6		12.1
ENSCO 59	May 2012	Jackups	22.8		21.9		.9
			$	311.1	$	291.8	$	19.3

⁽¹⁾ The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and were previously included within the operating segment noted in the above table.

⁽²⁾ Includes the rig's net book value as well as inventory and other assets on the date of the sale.

⁽³⁾ In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which are contracted to Pemex. As described below, the loss on sale and operating results of ENSCO 93 were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

During 2014, management committed to a plan to sell six floaters and two jackups. ENSCO 5000, ENSCO 5001, ENSCO 5002, ENSCO 6000, ENSCO 7500, ENSCO DS-2, ENSCO 58 and ENSCO 90 were removed from our portfolio of rigs marketed for contract drilling services. These rigs were written down to fair value, less costs to sell. We recorded a non-cash loss on impairment totaling $1.2 billion, net of tax benefits of $83.5 million, during the year ended December 31, 2014. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014.

We completed the sale of ENSCO 5000 for net proceeds of $1.3 million in December 2014. The remaining five floaters and two jackups are being actively marketed for sale and were classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

The operating results from these rigs were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

During 2014, we sold ENSCO 93, a jackup contracted to Pemex. In connection with this sale, we executed a charter agreement with the purchaser to continue operating the rig for the remainder of the Pemex contract, which had an anticipated completion date in late 2015. Based on market developments during the fourth quarter, we now expect that the ENSCO 93 charter agreement will terminate prior to September 30, 2015. As a result, the loss on sale of $1.2 million and ENSCO 93 operating results were reclassified to (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014. Net proceeds from the sale of $51.7 million were included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2014. See "Note 12 - Sale-leaseback" for additional information.

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During 2014, we sold ENSCO 85 for net proceeds of $64.4 million and ENSCO 69 and Pride Wisconsin for net proceeds of $32.2 million. The operating results of these rigs were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014. The net proceeds from the sale for ENSCO 69 and Pride Wisconsin were received in December 2013 and included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2013.

During 2012, we classified jackup rig Pride Pennsylvania as held for sale, and the rig was written down to fair value less estimated cost to sell. We recognized a $2.5 million loss for assets classified as held for sale during the year ended December 31, 2012.

The following table summarizes (loss) income from discontinued operations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Revenues	$	325.0		$	596.4		$	668.6
Operating expenses	372.0			577.6			544.3
Operating (loss) income	(47.0		)	18.8			124.3
Other income	—			.3			1.3
Income tax expense	(30.7		)	(20.2		)	(8.5		)
Loss on impairment, net	(1,158.8		)	—			—
Gain (loss) on disposal of discontinued operations, net	37.3			(1.1		)	(16.5		)
(Loss) income from discontinued operations	$	(1,199.2	)	$	(2.2	)	$	100.6

Debt and interest expense are not allocated to our discontinued operations.

During 2008, ENSCO 74 was lost as a result of Hurricane Ike in the U.S. Gulf of Mexico. The owner of a pipeline filed claims alleging that ENSCO 74 caused the pipeline to rupture during Hurricane Ike. We incurred $3.6 million in professional fees in connection with this matter, which we applied against our $10.0 million per occurrence deductible under our liability insurance policy.

In February 2014, we reached an agreement with the owner of the pipeline to settle the claims for $9.6 million. Accordingly, we recorded a $6.4 million charge for our remaining obligation under our liability insurance policy in loss from discontinued operations in our consolidated statement of operations for the year ended December 31, 2013. The remaining $3.2 million was settled by our underwriters. See "Note 11 - Commitments and Contingencies" for additional information on the ENSCO 74 loss.

11.  COMMITMENTS AND CONTINGENCIES

Leases

We are obligated under leases for certain of our offices and equipment.  Rental expense relating to operating leases was $54.4 million, $49.1 million and $46.9 million during the years ended December 31, 2014, 2013 and 2012, respectively. Future minimum rental payments under our noncancellable operating lease obligations are as follows:  $77.3 million during 2015; $31.8 million during 2016; $16.2 million during 2017; $10.6 million during 2018; $10.2 million during 2019 and $55.0 million thereafter.

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Capital Commitments

The following table summarizes the cumulative amount of contractual payments made as of December 31, 2014 for our rigs under construction and estimated timing of our remaining contractual payments (in millions): 

	Cumulative Paid(1)		2015		2016		2017		Total(2)
ENSCO DS-8	161.4		384.4		—		—		545.8
ENSCO DS-9	157.4		375.0		—		—		532.4
ENSCO DS-10	206.0		310.3		—		—		516.3
ENSCO 110	41.0		166.2		—		—		207.2
ENSCO 123	53.5		—		217.0		—		270.5
ENSCO 140	78.4		78.9		39.2		—		196.5
ENSCO 141	39.2		38.7		117.6		—		195.5
	$	736.9	$	1,353.5	$	373.8	$	—	$	2,464.2

⁽¹⁾ Cumulative paid represents the aggregate amount of contractual payments made from commencement of the construction agreement through December 31, 2014.

⁽²⁾ Total commitments are based on fixed-price shipyard construction contracts, exclusive of costs associated with commissioning, systems integration testing, project management and capitalized interest.

Future contractual payments for rig enhancement projects, which are not reflected in the table above, are $42.8 million. We currently estimate these payments will be made during 2015.     

The timing of these expenditures may vary based on the completion of various construction milestones, which are, to a large extent, beyond our control.

ENSCO 29 Wreck Removal

During 2005, a portion of the ENSCO 29 platform drilling rig was lost over the side of a customer's platform as a result of Hurricane Katrina. In June 2014, we received a letter from an operator demanding that Ensco retrieve the derrick and drawworks from the seabed.

Our property insurance policies include coverage for the ENSCO 29 wreckage and debris removal costs up to $3.8 million. We also maintain liability insurance policies that provide coverage under certain circumstances for wreckage and debris removal costs in excess of the $3.8 million coverage provided under the property insurance policies. We believe that it is not probable a liability exists with respect to this matter, and no liability has been recorded on our consolidated balance sheet as of December 31, 2014. While we cannot reasonably estimate a range of possible loss at this time, it is possible that removal costs may be in excess of our insurance coverage. Although we do not expect costs associated with the ENSCO 29 wreck removal 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.

ENSCO 74 Loss

During 2008, ENSCO 74 was lost as a result of Hurricane Ike in the U.S. Gulf of Mexico.  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 during 2009.  Wreck removal operations on the sunken rig hull of ENSCO 74 were completed during 2010.

We filed a petition for exoneration or limitation of liability under U.S. admiralty and maritime law during 2009. A number of claimants presented claims in the exoneration/limitation proceedings. We have liability insurance policies that provide coverage for such claims as well as removal of wreckage and debris in excess of the property

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insurance policy sublimit, subject to a $10.0 million per occurrence deductible for third-party claims and an annual aggregate limit of $490.0 million. 

The owner of a pipeline filed claims alleging that ENSCO 74 caused the pipeline to rupture during Hurricane Ike and sought damages for the cost of repairs and business interruption in an amount in excess of $26.0 million. During 2014, we reached an agreement with the owner of the pipeline to settle the claims for $9.6 million. Prior to the settlement we incurred legal fees of $3.6 million for this matter. During 2014, we paid the remaining $6.4 million of our deductible under our liability insurance policy, which was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2013. The remaining $3.2 million was paid by our underwriters under the terms of the related insurance policies.

The owner of the oil tanker that struck the hull of ENSCO 74 filed claims seeking monetary damages currently in excess of $5.0 million for losses incurred when the tanker struck the sunken hull of ENSCO 74. This matter went to trial in June 2014, and the Company won a directed verdict on all claims. The plaintiff has the right to appeal the decision. We believe that it is not probable that a liability exists with respect to these claims.

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 Illinois, Mississippi, Texas, Louisiana and the UK by approximately 125 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.

During 2013, we reached an agreement in principle with 58 of the plaintiffs to settle lawsuits filed in Mississippi for a nominal amount. A special master reviewed all 58 cases and made an allocation of settlement funds among the parties.  The District Court Judge reviewed the allocations and accepted the special master’s recommendations and approved the settlements.  The settlement documents and final documentation for the individual plaintiffs are being processed.

We intend to vigorously defend against the remaining 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 Illinois, Mississippi, Texas, Louisiana and the UK, we have other asbestos or lung injury claims pending against us in litigation in other jurisdictions. Although we do not expect 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.

  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,

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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.

In the ordinary course of business with customers and others, we have entered into letters of credit to guarantee our performance as it relates to our drilling contracts, contract bidding, customs duties, tax appeals and other obligations in various jurisdictions. Letters of credit outstanding as of December 31, 2014 totaled $263.9 million and are issued under facilities provided by various banks and other financial institutions. Obligations under these letters of credit are not normally called, as we typically comply with the underlying performance requirement. As of December 31, 2014, we had not been required to make collateral deposits with respect to these agreements.

12.  SALE-LEASEBACK

In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which were contracted to Pemex. We received proceeds of $211.8 million and incurred commissions and other incremental, direct costs of $5.3 million. The carrying value of these rigs was $169.6 million.

In connection with this sale, we executed charter agreements with the purchaser to continue operating the rigs for the remainder of the Pemex contracts, which have anticipated completion dates in either late 2015 or 2016. We accounted for the transaction as a sale-leaseback, whereby we will retain a significant portion of the remaining use of the rigs as a result of the charter agreements.

We recorded an aggregate gain on sale of $7.5 million at the time of disposal, which represented the portion of the gain that exceeded the present value of payments due under the charter agreements, and was included in contract drilling expense in our consolidated statement of operations for the year ended December 31, 2014. The remaining $29.4 million gain was deferred and amortized to contract drilling expense within the Jackup segment over the remaining charter term of each rig. Of the $29.4 million deferred gain, $7.0 million was recognized in contract drilling expense in our consolidated statement of operations for the year ended December 31, 2014 and $22.4 million was included in accrued liabilities and other on our consolidated balance sheet as of December 31, 2014.

Due to our charter agreements with the purchaser, we expect to have significant continuing involvement and cash flows related to ENSCO 83, ENSCO 89 and ENSCO 98; therefore, the operating results for these rigs were included in income from continuing operations within the Jackup segment for periods prior to the date of sale (September 30, 2014). Operating results for periods beginning after September 30, 2014 were included in income from continuing operations within the Other segment. The proceeds from the sale of these rigs were included in investing activities of continuing operations in our consolidated statement of cash flows for the year ended December 31, 2014.

At the time of sale, we expected to also have significant continuing involvement and cash flows related to ENSCO 93; therefore, the operating results for the rig were included in income from continuing operations within the Jackup segment at September 30, 2014. Based on market developments during the fourth quarter, we now expect that the ENSCO 93 charter agreement will terminate prior to September 30, 2015. As a result, the loss on sale of $1.2 million and ENSCO 93 operating results were reclassified to (loss) income from discontinued operations, net in our consolidated statements of operations for the three-year period December 31, 2014. The proceeds from the sale were included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2014. See "Note 10 - Discontinued Operations" for additional information.

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13.  SEGMENT INFORMATION

    Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

Segment information for each of the years in the three-year period ended December 31, 2014 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." We measure segment assets as property and equipment. Prior year information has been reclassified to conform to the current year presentation.

Year Ended December 31, 2014

	Floaters			Jackups		Other		Operating Segments Total			Reconciling Items			Consolidated Total
Revenues	$	2,697.6		$	1,774.6	$	92.3	$	4,564.5		$	—		$	4,564.5
Operating expenses
Contract drilling   (exclusive of depreciation)	1,201.2			807.4		68.3		2,076.9			—			2,076.9
Loss on impairment	3,982.3			236.4		—		4,218.7			—			4,218.7
Depreciation	358.1			171.2		—		529.3			8.6			537.9
General and administrative	—			—		—		—			131.9			131.9
Operating (loss) income	$	(2,844.0	)	$	559.6	$	24.0	$	(2,260.4	)	$	(140.5	)	$	(2,400.9	)
Property and equipment, net	$	9,462.3		$	2,995.3	$	—	$	12,457.6		$	77.2		$	12,534.8
Capital expenditures	$	856.2		$	667.7	$	—	$	1,523.9		$	44.9		$	1,568.8

Year Ended December 31, 2013

	Floaters		Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	2,659.6	$	1,588.7	$	75.1	$	4,323.4	$	—		$	4,323.4
Operating expenses
Contract drilling   (exclusive of depreciation)	1,126.0		762.6		58.5		1,947.1		—			1,947.1
Depreciation	342.2		147.5		—		489.7		6.5			496.2
General and administrative	—		—		—		—		146.8			146.8
Operating income (loss)	$	1,191.4	$	678.6	$	16.6	$	1,886.6	$	(153.3	)	$	1,733.3
Property and equipment, net	$	11,303.4	$	2,961.6	$	—	$	14,265.0	$	46.0		$	14,311.0
Capital expenditures	$	1,028.6	$	708.3	$	—	$	1,736.9	$	26.6		$	1,763.5

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Year Ended December 31, 2012

	Floaters		Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	2,149.1	$	1,406.9	$	82.8	$	3,638.8	$	—		$	3,638.8
Operating expenses
Contract drilling   (exclusive of depreciation)	894.5		687.2		61.1		1,642.8		—			1,642.8
Depreciation	283.3		151.6		—		434.9		8.9			443.8
General and administrative	—		—		—		—		148.9			148.9
Operating income (loss)	$	971.3	$	568.1	$	21.7	$	1,561.1	$	(157.8	)	$	1,403.3
Property and equipment, net	$	10,727.6	$	2,389.8	$	—	$	13,117.4	$	28.2		$	13,145.6
Capital expenditures	$	1,519.4	$	191.1	$	—	$	1,710.5	$	2.7		$	1,713.2

Information about Geographic Areas

As of December 31, 2014, our Floaters segment consisted of seven drillships, 13 dynamically positioned semisubmersible rigs and five moored semisubmersible rigs deployed in various locations throughout North and South America, Middle East and Africa, Asia Pacific, Europe and the Mediterranean and Brazil. Additionally, our Floaters segment included three ultra-deepwater drillships under construction in South Korea.  

Our Jackups segment consisted of 42 jackup rigs, of which 38 were deployed in various locations throughout North and South America, Middle East and Africa, Asia Pacific and Europe and the Mediterranean and four of which were under construction in Singapore and the United Arab Emirates.  

As of December 31, 2014, the geographic distribution of our drilling rigs by operating segment was as follows:

	Floaters(1)	Jackups(1)	Total(2)
North & South America (excluding Brazil)	9	8	17
Middle East & Africa	4	11	15
Europe & the Mediterranean	4	11	15
Asia & Pacific Rim	4	8	12
Asia & Pacific Rim (under construction)	3	2	5
Brazil	4	—	4
Middle East & Africa (under construction)	—	2	2
Total	28	42	70

⁽¹⁾  The five floaters and two jackups classified as "held for sale" as of December 31, 2014 are included in the table above.

⁽²⁾  We provide management services on six rigs owned by third-parties not included in the table above. 

For purposes of our geographic disclosure, we attribute revenues to the geographic location where such revenues are earned and assets to the geographic location of the drilling rig as of the end of the applicable year. For new construction projects, assets are attributed to the location of future operation if known or to the location of construction if the ultimate location of operation is undetermined.

Information by country for those countries that account for more than 10% of total revenues or 10% of our long-lived assets was as follows (in millions):

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	Revenues						Long-lived Assets
	2014		2013		2012		2014		2013		2012
United States	$	1,712.4	$	1,687.2	$	1,265.5	$	5,240.4	$	4,617.8	$	4,525.9
Angola	607.9		365.9		190.0		1,913.5		2,543.7		2,147.2
Brazil	459.1		683.7		776.3		1,459.0		2,447.5		2,911.3
Other countries	1,785.1		1,586.6		1,407.0		3,921.9		4,702.0		3,561.2
Total	$	4,564.5	$	4,323.4	$	3,638.8	$	12,534.8	$	14,311.0	$	13,145.6

14.  SUPPLEMENTAL FINANCIAL INFORMATION

Consolidated Balance Sheet Information

Accounts receivable, net, as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014			2013
Trade	$	878.8		$	869.8
Other	15.9			14.3
	894.7			884.1
Allowance for doubtful accounts	(11.4		)	(28.4		)
	$	883.3		$	855.7

Other current assets as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Inventory	240.3		256.4
Assets held for sale	152.4		8.6
Prepaid taxes	90.6		88.1
Deferred costs	61.9		47.4
Deferred tax assets	43.8		23.1
Prepaid expenses	33.8		18.5
Derivative assets	.6		11.6
Other	6.0		10.2
	$	629.4	$	463.9

Assets held for sale primarily consists of drilling rigs and equipment. See "Note 3 - Property and Equipment" for additional information on the assets classified as "held for sale" on our balance sheet as of December 31, 2014.

119

Other assets, net, as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred costs	$	82.3	$	59.1
Intangible assets	49.0		83.8
Supplemental executive retirement plan assets	43.2		37.7
Prepaid taxes on intercompany transfers of property	39.7		50.2
Deferred tax assets	38.4		25.2
Warranty and other claim receivables	30.6		30.6
Unbilled receivables	18.6		51.9
Other	12.4		14.2
	$	314.2	$	352.7

      Accrued liabilities and other as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred revenue	241.3		169.8
Personnel costs	214.0		242.0
Taxes	97.0		84.2
Accrued interest	83.8		68.0
Derivative liabilities	24.1		10.4
Advance payment received on sale of assets	—		33.0
Customer pre-payments	—		20.0
Other	36.4		31.3
	$	696.6	$	658.7

Other liabilities as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred revenue	$	373.2	$	217.6
Unrecognized tax benefits (inclusive of interest and penalties)	142.4		148.0
Supplemental executive retirement plan liabilities	45.1		40.5
Intangible liabilities	40.7		69.1
Personnel costs	26.1		37.2
Other	39.8		33.3
	$	667.3	$	545.7

Accumulated other comprehensive income as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Derivative Instruments	$	8.0	$	20.6
Other	3.9		(2.4		)
	$	11.9	$	18.2

120

Consolidated Statement of Operations Information

Repair and maintenance expense related to continuing operations for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014		2013		2012
Repair and maintenance expense	$	357.2	$	287.8	$	276.3

Consolidated Statement of Cash Flows Information

Net cash provided by operating activities of continuing operations attributable to the net change in operating assets and liabilities for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
Increase (decrease) in liabilities	208.2			(10.3		)	312.3
(Increase) decrease in other assets	(76.4		)	(94.1		)	67.8
(Increase) decrease in accounts receivable	(38.5		)	(46.7		)	59.1
	$	93.3		$	(151.1	)	$	439.2

Cash paid for interest and income taxes for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014		2013		2012
Interest, net of amounts capitalized	$	170.0	$	182.2	$	150.7
Income taxes	218.2		195.4		77.9

Capitalized interest totaled $78.2 million, $67.7 million and $105.8 million during the years ended December 31, 2014, 2013 and 2012, respectively. Capital expenditure accruals totaling $137.2 million, $111.8 million and $110.7 million for the years ended December 31, 2014, 2013 and 2012, respectively, were excluded from investing activities in our consolidated statements of cash flows. 

Amortization of intangibles and other, net, included amortization of intangible assets and liabilities related to the estimated fair values of acquired Company firm drilling contracts in place at the Pride acquisition date, debt premiums related to the fair value adjustment of acquired Company debt instruments, deferred charges for income taxes incurred on intercompany transfers of drilling rigs and certain other deferred costs.

Concentration of 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 consist 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 generally have been within management's expectations. During 2014, we insured certain receivables deemed to have a higher credit risk. We mitigate our credit risk relating to cash and investments by focusing on diversification and quality of instruments. Cash equivalents and short-term investments consist of a portfolio of high-grade instruments. Custody of cash and cash equivalents and short-term investments is maintained at several well-capitalized financial institutions, and we monitor the financial condition of those financial institutions.  

We mitigate our credit risk relating to counterparties of our derivatives through a variety of techniques, including transacting with multiple, high-quality financial institutions, thereby limiting our exposure to individual counterparties and by entering into ISDA Master Agreements, which include provisions for a legally enforceable master netting

121

agreement, with almost all derivative counterparties. The terms of the ISDA agreements may also include credit support requirements, cross default provisions, termination events, or set-off provisions. Legally enforceable master netting agreements reduce credit risk by providing protection in bankruptcy in certain circumstances and generally permitting the closeout and netting of transactions with the same counterparty upon the occurrence of certain events.

During 2014, BP accounted for $723.9 million, or 16%, of our consolidated revenues, 80% of which were attributable to our Floaters segment.

During 2013, Petrobras accounted for $604.8 million, or 14%, of consolidated revenues, all of which were provided by our Floaters segment, and BP accounted for $444.9 million, or 10%, of consolidated revenues, 84% of which were attributable to our Floaters segment.

During 2012, Petrobras accounted for $771.9 million, or 21%, of our consolidated revenues, all of which were attributable to our Floaters segment.

During 2014, revenues provided by our drilling operations in the U.S. Gulf of Mexico totaled $1.7 billion, or 38%, of our consolidated revenues, of which 79% were provided by our Floaters segment. Revenues provided by our drilling operations in Angola and Brazil during the year ended December 31, 2014 totaled $607.9 million and $459.1 million, or 13% and 10%, of our consolidated revenues, all of which were provided by our Floaters segment.

During 2013, revenues provided by our drilling operations in the U.S. Gulf of Mexico totaled $1.7 billion, or 39%, of our consolidated revenues, of which 77% were provided by our Floaters segment. Revenues provided by our drilling operations in Brazil during the year ended December 31, 2013 totaled $683.7 million, or 16%, of our consolidated revenue, all of which were provided by our Floaters segment.

During 2012, revenues provided by our drilling operations in the U.S. Gulf of Mexico totaled $1.3 billion, or 35%, of our consolidated revenues, of which 75% were provided by our Floaters segment. Revenues provided by our drilling operations in Brazil during the year ended December 31, 2012 totaled $776.3 million, or 21%, of our consolidated revenues, all of which were provided by our Floaters segment.

15.  GUARANTEE OF REGISTERED SECURITIES

In connection with the Pride acquisition, 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% senior notes due 2019, 6.875% senior notes due 2020 and 7.875% senior notes due 2040, which had an aggregate outstanding principal balance of $1.7 billion as of December 31, 2014. 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 is also 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 December 31, 2014.

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 our condensed consolidating statements of operations for each of the years in the three-year period ended December 31, 2014; our condensed consolidating statements of comprehensive (loss) income for each of the years in the three-year period ended December 31, 2014; our condensed consolidating balance sheets as of December 31, 2014 and 2013; and our condensed consolidating statements of cash flows for each of the years in the three-year period ended December 31, 2014, in accordance with Rule 3-10 of Regulation S-X. 

122

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2014 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	34.5		$	145.4		$	—		$	4,683.0		$	(298.4	)	$	4,564.5
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	31.8			145.4			—			2,198.1			(298.4		)	2,076.9
Loss on impairment	—			—			—			4,218.7			—			4,218.7
Depreciation	.2			7.6			—			530.1			—			537.9
General and administrative	52.0			.4			—			79.5			—			131.9
OPERATING (LOSS) INCOME	(49.5		)	(8.0		)	—			(2,343.4		)	—			(2,400.9		)
OTHER (EXPENSE) INCOME, NET	(67.0		)	(43.3		)	(54.7		)	17.1			—			(147.9		)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(116.5		)	(51.3		)	(54.7		)	(2,326.3		)	—			(2,548.8		)
INCOME TAX (BENEFIT) EXPENSE	—			(44.9		)	—			185.4			—			140.5
DISCONTINUED OPERATIONS, NET	—			—			—			(1,199.2		)	—			(1,199.2		)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	(3,786.1		)	(3,651.0		)	(3,744.3		)	—			11,181.4			—
NET LOSS	(3,902.6		)	(3,657.4		)	(3,799.0		)	(3,710.9		)	11,181.4			(3,888.5		)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(14.1		)	—			(14.1		)
NET LOSS ATTRIBUTABLE TO ENSCO	$	(3,902.6	)	$	(3,657.4	)	$	(3,799.0	)	$	(3,725.0	)	$	11,181.4		$	(3,902.6	)

123

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2013 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	35.0		$	149.4		$	—		$	4,446.4		$	(307.4	)	$	4,323.4
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	27.5			149.4			—			2,077.6			(307.4		)	1,947.1
Depreciation	.3			4.0			—			491.9			—			496.2
General and administrative	63.5			.5			—			82.8			—			146.8
OPERATING (LOSS) INCOME	(56.3		)	(4.5		)	—			1,794.1			—			1,733.3
OTHER (EXPENSE) INCOME, NET	(65.6		)	(9.4		)	(27.9		)	2.8			—			(100.1		)
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(121.9		)	(13.9		)	(27.9		)	1,796.9			—			1,633.2
INCOME TAX EXPENSE	—			92.5			—			110.6			—			203.1
DISCONTINUED OPERATIONS, NET	—			—			—			(2.2		)	—			(2.2		)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,540.1			366.2			111.6			—			(2,017.9		)	—
NET INCOME	1,418.2			259.8			83.7			1,684.1			(2,017.9		)	1,427.9
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(9.7		)	—			(9.7		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	1,418.2		$	259.8		$	83.7		$	1,674.4		$	(2,017.9	)	$	1,418.2

124

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	44.0		$	147.6		$	—		$	3,767.3		$	(320.1	)	$	3,638.8
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	51.2			147.6			—			1,764.1			(320.1		)	1,642.8
Depreciation	.4			3.5			—			439.9			—			443.8
General and administrative	63.8			.4			—			84.7			—			148.9
OPERATING (LOSS) INCOME	(71.4		)	(3.9		)	—			1,478.6			—			1,403.3
OTHER (EXPENSE) INCOME, NET	(41.8		)	(7.0		)	(50.0		)	.2			—			(98.6		)
(LOSS) INCOME BEFORE INCOME TAXES	(113.2		)	(10.9		)	(50.0		)	1,478.8			—			1,304.7
INCOME TAX EXPENSE	—			68.8			—			159.8			—			228.6
DISCONTINUED OPERATIONS, NET	—			—			—			100.6						100.6
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,282.9			335.9			239.2			—			(1,858.0		)	—
NET INCOME	1,169.7			256.2			189.2			1,419.6			(1,858.0		)	1,176.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(7.0		)	—			(7.0		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	1,169.7		$	256.2		$	189.2		$	1,412.6		$	(1,858.0	)	$	1,169.7

125

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2014

(in millions)

	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
NET LOSS	$	(3,902.6	)	$	(3,657.4	)	$	(3,799.0	)	$	(3,710.9	)	$	11,181.4	$	(3,888.5	)
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	—			(11.7		)	—			—			—		(11.7		)
Reclassification of net gains on derivative instruments from other comprehensive income into net income	—			(.9		)	—			—			—		(.9		)
Other	—			—			—			6.3			—		6.3
NET OTHER COMPREHENSIVE (LOSS) INCOME	—			(12.6		)	—			6.3			—		(6.3		)
COMPREHENSIVE LOSS	(3,902.6		)	(3,670.0		)	(3,799.0		)	(3,704.6		)	11,181.4		(3,894.8		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(14.1		)	—		(14.1		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$	(3,902.6	)	$	(3,670.0	)	$	(3,799.0	)	$	(3,718.7	)	$	11,181.4	$	(3,908.9	)

126

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2013

(in millions)

	Ensco plc		ENSCO International Incorporated			Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	1,418.2	$	259.8		$	83.7	$	1,684.1		$	(2,017.9	)	$	1,427.9
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	—		(5.8		)	—		—			—			(5.8		)
Reclassification of net losses on derivative instruments from other comprehensive income into net income	—		2.0			—		—			—			2.0
Other	—		—			—		1.9			—			1.9
NET OTHER COMPREHENSIVE (LOSS) INCOME	—		(3.8		)	—		1.9			—			(1.9		)
COMPREHENSIVE INCOME	1,418.2		256.0			83.7		1,686.0			(2,017.9		)	1,426.0
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—			—		(9.7		)	—			(9.7		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	1,418.2	$	256.0		$	83.7	$	1,676.3		$	(2,017.9	)	$	1,416.3

127

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2012

(in millions)

	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	1,169.7	$	256.2	$	189.2	$	1,419.6		$	(1,858.0	)	$	1,176.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		6.3		—		2.4			—			8.7
Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	—		.2		—		(.2		)	—			—
Other	—		—		—		2.8			—			2.8
NET OTHER COMPREHENSIVE INCOME	—		6.5		—		5.0			—			11.5
COMPREHENSIVE INCOME	1,169.7		262.7		189.2		1,424.6			(1,858.0		)	1,188.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—		—		(7.0		)	—			(7.0		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	1,169.7	$	262.7	$	189.2	$	1,417.6		$	(1,858.0	)	$	1,181.2

128

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2014 (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	$	287.4	$	—	$	90.8		$	286.6	$	—		$	664.8
Short-term investments	712.0		—		—			45.3		—			757.3
Accounts receivable, net	—		—		—			883.3		—			883.3
Accounts receivable from   affiliates	34.5		210.4		—			134.6		(379.5		)	—
Other	4.1		86.9		—			538.4		—			629.4
Total current assets	1,038.0		297.3		90.8			1,888.2		(379.5		)	2,934.8
PROPERTY AND EQUIPMENT, AT COST	2.1		71.5		—			14,901.9		—			14,975.5
Less accumulated depreciation	1.7		34.1		—			2,404.9		—			2,440.7
Property and equipment, net	.4		37.4		—			12,497.0		—			12,534.8
GOODWILL	—		—		—			276.1		—			276.1
DUE FROM AFFILIATES	2,873.2		4,748.2		1,835.0			6,308.8		(15,765.2		)	—
INVESTMENTS IN AFFILIATES	9,084.8		1,233.5		461.6			—		(10,779.9		)	—
OTHER ASSETS, NET	17.0		47.4		—			249.8		—			314.2
	$	13,013.4	$	6,363.8	$	2,387.4		$	21,219.9	$	(26,924.6	)	$	16,059.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued      liabilities	$	47.8	$	42.8	$	34.3		$	944.9	$	—		$	1,069.8
Accounts payable to affiliates	23.5		158.3		—			197.7		(379.5		)	—
Current maturities of long-term   debt	—		—		—			34.8		—			34.8
Total current liabilities	71.3		201.1		34.3			1,177.4		(379.5		)	1,104.6
DUE TO AFFILIATES	994.8		3,817.4		1,547.7			9,405.3		(15,765.2		)	—
LONG-TERM DEBT	3,724.4		149.2		1,973.2			38.8		—			5,885.6
DEFERRED INCOME TAXES	—		176.8		—			2.7		—			179.5
OTHER LIABILITIES	—		6.1		7.0			654.2		—			667.3
ENSCO SHAREHOLDERS' EQUITY (DEFICIT)	8,222.9		2,013.2		(1,174.8		)	9,933.6		(10,779.9		)	8,215.0
NONCONTROLLING INTERESTS	—		—		—			7.9		—			7.9
Total equity	8,222.9		2,013.2		(1,174.8		)	9,941.5		(10,779.9		)	8,222.9
	$	13,013.4	$	6,363.8	$	2,387.4		$	21,219.9	$	(26,924.6	)	$	16,059.9

129

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2013 (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	$	46.5	$	.5	$	4.9	$	113.7	$	—		$	165.6
Short-term investments	—		—		—		50.0		—			50.0
Accounts receivable, net	—		—		—		855.7		—			855.7
Accounts receivable from   affiliates	1,235.0		213.8		5.5		4,169.2		(5,623.5		)	—
Other	3.2		61.3		—		399.4		—			463.9
Total current assets	1,284.7		275.6		10.4		5,588.0		(5,623.5		)	1,535.2
PROPERTY AND EQUIPMENT, AT COST	2.1		34.3		—		17,462.1		—			17,498.5
Less accumulated depreciation	1.5		26.5		—		3,159.5		—			3,187.5
Property and equipment, net	.6		7.8		—		14,302.6		—			14,311.0
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	4,876.8		4,236.0		1,898.0		5,069.7		(16,080.5		)	—
INVESTMENTS IN AFFILIATES	13,830.1		4,868.6		4,092.2		—		(22,790.9		)	—
OTHER ASSETS, NET	8.8		60.1		—		283.8		—			352.7
	$	20,001.0	$	9,448.1	$	6,000.6	$	28,518.1	$	(44,494.9	)	$	19,472.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued      liabilities	$	31.5	$	9.1	$	34.2	$	925.0	$	—		$	999.8
Accounts payable to affiliates	3,666.1		549.7		—		1,407.7		(5,623.5		)	—
Current maturities of long-term   debt	—		—		—		47.5		—			47.5
Total current liabilities	3,697.6		558.8		34.2		2,380.2		(5,623.5		)	1,047.3
DUE TO AFFILIATES	1,030.8		2,760.4		1,331.1		10,958.2		(16,080.5		)	—
LONG-TERM DEBT	2,473.7		149.1		2,007.8		88.3		—			4,718.9
DEFERRED INCOME TAXES	—		358.3		—		3.8		—			362.1
OTHER LIABILITIES	—		2.3		8.7		534.7		—			545.7
ENSCO SHAREHOLDERS' EQUITY	12,798.9		5,619.2		2,618.8		14,545.6		(22,790.9		)	12,791.6
NONCONTROLLING INTERESTS	—		—		—		7.3		—			7.3
Total equity	12,798.9		5,619.2		2,618.8		14,552.9		(22,790.9		)	12,798.9
	$	20,001.0	$	9,448.1	$	6,000.6	$	28,518.1	$	(44,494.9	)	$	19,472.9

130

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 2014 (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      operatingactivities of continuing operations	$	(63.8	)	$	(167.6	)	$	(90.9	)	$	2,380.2		$	—	$	2,057.9
INVESTING ACTIVITIES
Additions to property and equipment	—			(37.2		)	—			(1,531.6		)	—		(1,568.8		)
Purchases of short-term investments	(716.1		)	—			—			(74.5		)	—		(790.6		)
Net proceeds from disposition of assets	—			—			—			169.2			—		169.2
Maturities of short-term investments	—			—			—			83.3			—		83.3
Net cash used in investing activities of continuing operations	(716.1		)	(37.2		)	—			(1,353.6		)	—		(2,106.9		)
FINANCING ACTIVITIES
Proceeds from debt issuance	1,246.4			—			—			—			—		1,246.4
Cash dividends paid	(703.0		)	—			—			—			—		(703.0		)
Reduction of long-term   borrowings	—			—			—			(60.1		)	—		(60.1		)
Debt financing costs	(13.4		)	—			—			—			—		(13.4		)
Proceeds from exercise of share   options	2.6			—			—			—			—		2.6
Advances from (to) affiliates	501.9			204.3			176.8			(883.0		)	—		—
Other	(13.7		)	—			—			(16.1		)	—		(29.8		)
Net cash provided by (used in)          financing activities	1,020.8			204.3			176.8			(959.2		)	—		442.7
DISCONTINUED OPERATIONS
Operating activities	—			—			—			(3.8		)	—		(3.8		)
Investing activities	—			—			—			109.3			—		109.3
Net cash provided by discontinued operations	—			—			—			105.5			—		105.5
Effect of exchange rate changes on cash and cash equivalents	—			—			—			—			—		—
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	240.9			(0.5		)	85.9			172.9			—		499.2
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	46.5			0.5			4.9			113.7			—		165.6
CASH AND CASH EQUIVALENTS, END OF YEAR	$	287.4		$	—		$	90.8		$	286.6		$	—	$	664.8

131

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 2013 (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      operatingactivities of continuing operations	$	(114.8	)	$	(128.7	)	$	(62.9	)	$	2,117.6		$	—	$	1,811.2
INVESTING ACTIVITIES
Additions to property and   equipment	—			—			—			(1,763.5		)	—		(1,763.5		)
Purchases of short-term investments	—			—			—			(50.0		)	—		(50.0		)
Maturities of short-term investments	—			—			—			50.0			—		50.0
Net proceeds from disposition of assets	—			(4.1		)	—			10.1			—		6.0
Net cash used in investing activities of continuing operations	—			(4.1		)	—			(1,753.4		)	—		(1,757.5		)
FINANCING ACTIVITIES
Cash dividends paid	(525.6		)	—			—			—			—		(525.6		)
Reduction of long-term   borrowings	—			—			—			(47.5		)	—		(47.5		)
Proceeds from exercise of share   options	22.3			—			—			—			—		22.3
Debt financing costs	—			(4.6		)	—			—			—		(4.6		)
Advances from (to) affiliates	407.2			136.2			(17.2		)	(526.2		)	—		—
Other	(14.4		)	—			—			(7.3		)	—		(21.7		)
Net cash (used in) provided by          financing activities	(110.5		)	131.6			(17.2		)	(581.0		)	—		(577.1		)
DISCONTINUED OPERATIONS
Operating activities	—			—			—			169.3			—		169.3
Investing activities	—			—			—			32.8			—		32.8
Net cash provided by discontinued operations	—			—			—			202.1			—		202.1
Effect of exchange rate changes   on cash and cash equivalents	—			—			—			(.2		)	—		(.2		)
DECREASE IN CASH AND CASH EQUIVALENTS	(225.3		)	(1.2		)	(80.1		)	(14.9		)	—		(321.5		)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	271.8			1.7			85.0			128.6			—		487.1
CASH AND CASH EQUIVALENTS, END OF YEAR	$	46.5		$	.5		$	4.9		$	113.7		$	—	$	165.6

132

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 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      operatingactivities of continuing operations	$	(71.6	)	$	(38.2	)	$	(21.6	)	$	2,086.0		$	—	$	1,954.6
INVESTING ACTIVITIES
Additions to property and equipment	—			—			—			(1,713.2		)	—		(1,713.2		)
Purchases of short-term investments	—			—			—			(90.0		)	—		(90.0		)
Maturities of short-term investments	—			—			—			44.5			—		44.5
Net proceeds from disposition of assets	(.3		)	.4			—			3.1			—		3.2
Net cash (used in) provided       by investing activities of       continuing operations	(.3		)	.4			—			(1,755.6		)	—		(1,755.5		)
FINANCING ACTIVITIES
Cash dividends paid	(348.1		)	—			—			—			—		(348.1		)
Commercial paper borrowings,   net	(125.0		)	—			—			—			—		(125.0		)
Equity issuance cost	66.7			—			—			—			—		66.7
Reduction of long-term borrowings	—			—			—			(47.5		)	—		(47.5		)
Proceeds from exercise of share options	23.9			11.9			—			—			—		35.8
Advances from (to) affiliates	501.2			27.6			84.0			(612.8		)	—		—
Other	(11.6		)	—			—			(5.8		)	—		(17.4		)
Net cash provided by (used in) financing activities	107.1			39.5			84.0			(666.1		)	—		(435.5		)
DISCONTINUED OPERATIONS
Operating activities	—			—			—			232.5			—		232.5
Investing activities	—			—			—			58.3			—		58.3
Net cash provided by discontinued operations	—			—			—			290.8			—		290.8
Effect of exchange rate changes on cash and cash equivalents	—			—			—			2.0			—		2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	35.2			1.7			62.4			(42.9		)	—		56.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	236.6			—			22.6			171.5			—		430.7
CASH AND CASH EQUIVALENTS, END        OF YEAR	$	271.8		$	1.7		$	85.0		$	128.6		$	—	$	487.1

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16.  UNAUDITED QUARTERLY FINANCIAL DATA

The following tables summarize our unaudited quarterly consolidated income statement data for the years ended December 31, 2014 and 2013 (in millions, except per share amounts):

2014	First  Quarter			Second Quarter			Third Quarter			Fourth  Quarter			Year
Operating revenues	$	1,066.7		$	1,136.6		$	1,201.4		$	1,159.8		$	4,564.5
Operating expenses
Contract drilling (exclusive of depreciation)	520.2			542.5			500.2			514.0			2,076.9
Loss on impairment	—			703.5			—			3,515.2			4,218.7
Depreciation	131.1			132.2			135.2			139.4			537.9
General and administrative	38.1			36.2			29.3			28.3			131.9
Operating income	377.3			(277.8		)	536.7			(3,037.1		)	(2,400.9		)
Other expense, net	(29.1		)	(30.8		)	(38.4		)	(49.6		)	(147.9		)
Income (loss) from continuing operations before income taxes	348.2			(308.6		)	498.3			(3,086.7		)	(2,548.8		)
Income tax expense (benefit)	49.5			42.6			74.6			(26.2		)	140.5
Income (loss) from continuing operations	298.7			(351.2		)	423.7			(3,060.5		)	(2,689.3		)
(Loss) income from discontinued operations, net	(2.0		)	(818.4		)	9.2			(388.0		)	(1,199.2		)
Net income (loss)	296.7			(1,169.6		)	432.9			(3,448.5		)	(3,888.5		)
Net income attributable to noncontrolling interests	(4.2		)	(3.1		)	(3.5		)	(3.3		)	(14.1		)
Net income (loss) attributable to Ensco	$	292.5		$	(1,172.7	)	$	429.4		$	(3,451.8	)	$	(3,902.6	)
Earnings (loss) per share – basic
Continuing operations	$	1.26		$	(1.53	)	$	1.79		$	(13.22	)	$	(11.70	)
Discontinued operations	(0.01		)	(3.54		)	0.04			(1.67		)	(5.18		)
	$	1.25		$	(5.07	)	$	1.83		$	(14.89	)	$	(16.88	)
Earnings (loss) per share – diluted
Continuing operations	$	1.26		$	(1.53	)	$	1.79		$	(13.22	)	$	(11.70	)
Discontinued operations	(0.01		)	(3.54		)	0.04			(1.67		)	(5.18		)
	$	1.25		$	(5.07	)	$	1.83		$	(14.89	)	$	(16.88	)

134

2013	First  Quarter			Second Quarter			Third Quarter			Fourth  Quarter			Year
Operating revenues	$	989.4		$	1,076.1		$	1,119.9		$	1,138.0		$	4,323.4
Operating expenses
Contract drilling (exclusive of depreciation)	451.4			496.1			499.2			500.4			1,947.1
Depreciation	120.0			124.0			124.7			127.5			496.2
General and administrative	37.8			36.4			37.4			35.2			146.8
Operating income	380.2			419.6			458.6			474.9			1,733.3
Other expense, net	(29.8		)	(39.8		)	(1.6		)	(28.9		)	(100.1		)
Income from continuing operations before income taxes	350.4			379.8			457.0			446.0			1,633.2
Income tax expense	47.8			43.2			67.5			44.6			203.1
Income from continuing operations	302.6			336.6			389.5			401.4			1,430.1
Income (loss) from discontinued operations, net	17.3			26.0			(8.1		)	(37.4		)	(2.2		)
Net income	319.9			362.6			381.4			364.0			1,427.9
Net income attributable to noncontrolling interests	(2.8		)	(1.7		)	(2.6		)	(2.6		)	(9.7		)
Net income attributable to Ensco	$	317.1		$	360.9		$	378.8		$	361.4		$	1,418.2
Earnings (loss) per share – basic
Continuing operations	$	1.29		$	1.44		$	1.66		$	1.71		$	6.09
Discontinued operations	0.07			0.11			(0.04		)	(0.16		)	(0.01		)
	$	1.36		$	1.55		$	1.62		$	1.55		$	6.08
Earnings (loss) per share – diluted
Continuing operations	$	1.29		$	1.44		$	1.66		$	1.70		$	6.08
Discontinued operations	0.07			0.11			(0.04		)	(0.16		)	(0.01		)
	$	1.36		$	1.55		$	1.62		$	1.54		$	6.07

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Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Not applicable.

Item 9A.  Controls and Procedures

CONCLUSION REGARDING THE EFFECTIVENESS OF DISCLOSURE CONTROLS AND PROCEDURES

Based on their evaluation as of the end of the period covered by this Annual Report on Form 10-K, our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has concluded that our disclosure controls and procedures, as defined in Rule 13a-15 under the Securities Exchange Act of 1934, as amended, (the "Exchange Act"), are effective.

During the fiscal quarter ended December 31, 2014, 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.

See "Item 8. Financial Statements and Supplementary Data" for Management's Report on Internal Control Over Financial Reporting.

Item 9B.  Other Information

    Not applicable.

136

PART III

Item 10.  Directors, Executive Officers and Corporate Governance

The information required by this item with respect to our directors, corporate governance matters, committees of the Board of Directors and Section 16(a) of the Exchange Act is contained in our Proxy Statement for the Annual General Meeting of Shareholders ("Proxy Statement") to be filed with the SEC not later than 120 days after the end of our fiscal year ended December 31, 2014 and incorporated herein by reference.

The information required by this item with respect to our executive officers is set forth in "Executive Officers" in Part I of this Annual Report on Form 10-K.

The guidelines and procedures of the Board of Directors are outlined in our Corporate Governance Policy. The committees of the Board of Directors operate under written charters adopted by the Board of Directors. The Corporate Governance Policy and committee charters are available on our website at www.enscoplc.com in the Corporate Governance section and are available in print without charge by contacting our Investor Relations Department at 713-430-4607.

We have a Code of Business Conduct Policy that applies to all employees, including our principal executive officer, principal financial officer and controller. The Code of Business Conduct Policy is available on our website at www.enscoplc.com in the Corporate Governance section and is available in print without charge by contacting our Investor Relations Department. We intend to disclose any amendments to or waivers from our Code of Business Conduct Policy by posting such information on our website. Our Proxy Statement contains governance disclosures, including information on our Code of Business Conduct Policy, the Ensco Corporate Governance Policy, the director nomination process, shareholder director nominations, shareholder communications to the Board of Directors and director attendance at the Annual General Meeting of Shareholders.

Item 11.  Executive Compensation

    The information required by this item is contained in our Proxy Statement and incorporated herein by reference.

137

Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters

The following table summarizes certain information related to our compensation plans under which our shares are authorized for issuance as of December 31, 2014:

Plan category	Number of securities to be issued upon exercise of outstanding options, warrants and rights	Weighted-average exercise price of outstanding options, warrants and rights		Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))(1)
	(a)	(b)		(c)
Equity compensation      plans approved by       security holders	270,408	$	43.81	7,745,278
Equity compensation      plans not approved by      security holders(2)	201,555	37.43		—
Total	471,963	$	41.09	7,745,278

(1)

Under the 2012 LTIP, 7.7 million shares remained available for future issuances of non-vested share awards, share option awards and performance awards as of December 31, 2014.  Our performance awards granted prior to 2013 may be settled in Ensco shares, cash or a combination thereof. Performance awards granted in 2013 and 2014 will be settled in Ensco shares.

(2)

In connection with the Pride acquisition, we assumed Pride’s option plan and the outstanding options thereunder. As of December 31, 2014, options to purchase 201,555 shares at a weighted-average exercise price of $37.43 per share were outstanding under this plan. No shares are available for future issuance under this plan, no further options will be granted under this plan and the plan will be terminated upon the earlier of the exercise or expiration date of the last outstanding option.

Additional information required by this item is included in our Proxy Statement and incorporated herein by reference.

Item 13.  Certain Relationships and Related Transactions, and Director Independence

    The information required by this item is contained in our Proxy Statement and incorporated herein by reference.

Item 14.  Principal Accounting Fees and Services

    The information required by this item is contained in our Proxy Statement and incorporated herein by reference.

138

Item 15.  Exhibits, Financial Statement Schedules

(a)	The following documents are filed as part of this report:
	1.  Financial Statements
	Reports of Independent Registered Public Accounting Firm	79
	Consolidated Statements of Operations	81
	Consolidated Statements of Comprehensive Income	82
	Consolidated Balance Sheets	83
	Consolidated Statements of Cash Flows	84
	Notes to Consolidated Financial Statements	85
	2.  Financial Statement Schedules:
	The schedules for which provision is made in the applicable accounting regulations of the SEC are not required under the related instructions or are inapplicable or provided elsewhere in the financial statements and, therefore, have been omitted.

 3.  Exhibits

Exhibit         Number	Exhibit
2.1	Agreement and Plan of Merger and Reorganization, dated November 9, 2009, between ENSCO International Incorporated and ENSCO Newcastle LLC (incorporated by reference to Annex A to the Registration Statement of ENSCO International Limited on Form S-4 filed on November 9, 2009, File No. 333-162975).
2.2	Agreement and Plan of Merger, dated  February 6, 2011, among Ensco plc, ENSCO Ventures LLC, ENSCO International Incorporated and Pride International, Inc. (incorporated by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K filed on February 7, 2011, File No. 1-8097).
2.3	Amendment No. 1 to Agreement and Plan of Merger, dated March 1, 2011, by and among Ensco plc, Pride International, Inc., ENSCO Ventures LLC and ENSCO International Incorporated (incorporated by reference to Exhibit 2.2 to the Registrant's Registration Statement on Form S-4 filed on March 3, 2011, File No. 333-172587).
2.4	Amendment No. 2 to Agreement and Plan of Merger, dated May 23, 2011, by and among Ensco plc, Pride International, Inc., ENSCO International Incorporated and ENSCO Ventures LLC (incorporated by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K filed on May 24, 2011, File No.1-8097).
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 (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).
3.3	New Articles of Association of Ensco plc (incorporated by reference to Annex 2 to the Registrant's Proxy Statement on Form DEF 14A filed on April 5, 2013, as adopted by Special Resolution passed on May 20, 2013, File No. 1-8097).
4.1	Indenture, dated November 20, 1997, between ENSCO International Incorporated and Deutsche Bank Trust Company Americas (successor to Bankers Trust Company), as Trustee (incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K filed on November 24, 1997, File No. 1-8097).

139

4.2	First Supplemental Indenture, dated November 20, 1997, between ENSCO International Incorporated and Deutsche Bank Trust Company Americas (successor to Bankers Trust Company, as Trustee (incorporated by reference to Exhibit 4.2 to the Registrant's Current Report on Form 8-K, filed on November 24, 1997, File No. 1-8097).
4.3	Second Supplemental Indenture, dated December 22, 2009, among ENSCO International Incorporated, Ensco International plc and Deutsche Bank Trust Company Americas, as Trustee (incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
4.4	Form of Debenture (incorporated by reference to Exhibit 4.4 to the Registrant's Current Report on Form 8-K filed on November 24, 1997, File No. 1-8097).
4.5	Indenture, dated July 1, 2004, between Pride International, Inc. and The Bank of New York Mellon, as Trustee, including the form of notes issued pursuant thereto (successor to JPMorgan Chase Bank) (incorporated by reference to Exhibit 4.1 to Pride's Registration Statement on Form S-4 filed on August 10, 2004, File No. 333-118104).
4.6	First Supplemental Indenture, dated July 7, 2004, between Pride International, Inc. and The Bank of New York Mellon (successor to JPMorgan Chase Bank), as Trustee, including the form of note issued pursuant thereto (incorporated by reference to Exhibit 4.2 to Pride's Registration Statement on Form S-4 filed on August 10, 2004, File No. 333-118104).
4.7	Second Supplemental Indenture, dated June 2, 2009, between Pride International, Inc. and The Bank of New York Mellon, as Trustee, including the form of notes issued pursuant thereto (incorporated by reference to Exhibit 4.1 to Pride's Quarterly Report on Form 10-Q for the quarter ended June 30, 2009, File No. 1-13289).
4.8	Third Supplemental Indenture, dated August 6, 2010, between Pride International, Inc. and The Bank of New York Mellon, as Trustee, including the form of notes issued pursuant thereto (incorporated by reference to Exhibit 4.3 to Pride's Quarterly Report on Form 10-Q for the quarter ended September 30, 2010, File No. 1-13289).
4.9	Fourth Supplemental Indenture, dated May 31, 2011, among Ensco plc, Pride International, Inc. and The Bank of New York Mellon, as Trustee (incorporated by reference to Exhibit 4.4 to the Registrant's Current Report on Form 8-K filed on May 31, 2011, File No. 1-8097).
4.10	Form of Guarantee by Ensco plc (incorporated by reference to Exhibit 4.4  to the Registrant's Current Report on Form 8-K filed on May 31, 2011, File No. 1-8097).
4.11	Indenture, dated March 17, 2011, between Ensco plc and Deutsche Bank Trust Company Americas, as Trustee (incorporated by reference to Exhibit 4.22 to Post-Effective Amendment No. 2 to the Registrant's Registration Statement on Form S-3 filed on March 17, 2011, File No. 333-156705).
4.12	First Supplemental Indenture, dated March 17, 2011, between Ensco plc and Deutsche Bank Trust Company Americas, as Trustee (incorporated by reference to Exhibit 4.23 to Post-Effective Amendment No. 2 to the Registrant's Registration Statement on Form S-3 filed on March 17, 2011, File No. 333-156705).
4.13	Second Supplemental Indenture, dated as of September 29, 2014, between Ensco plc and Deutsche Bank Trust Company Americas, as Trustee (incorporated by reference to Exhibit 4.1 to the Registrant's Quarterly Report on Form 10-Q filed on October 30, 2014, File No.1-8097).
4.14	Form of Note for 4.50% Senior Notes due 2024 (incorporated by reference to Exhibit 4.2 to the Registrant's Quarterly Report on Form 10-Q filed on October 30, 2014, File No.1-8097).
4.15	Form of Note for 5.75% Senior Notes due 2044 (incorporated by reference to Exhibit 4.3 to the Registrant's Quarterly Report on Form 10-Q filed on October 30, 2014, File No.1-8097).
4.16	Form of Global Note for 3.250% Senior Notes due 2016 (incorporated by reference to Exhibit A of Exhibit 4.23 to Post-Effective Amendment No. 2 to the Registrant's Registration Statement on Form S-3 filed on March 17, 2011, File No. 333-156705).
4.17	Form of Global Note for 4.700% Senior Notes due 2021 (incorporated by reference to Exhibit B of Exhibit 4.23 to Post-Effective Amendment No. 2 to the Registrant's Registration Statement on Form S-3 filed on March 17, 2011, File No. 333-156705).
4.18	Form of Deed of Release of Shareholders (incorporated by reference to Annex A to the Registrant's Proxy Statement on Schedule 14A filed on April 5, 2011, File No. 1-8097).

140

10.1	Fourth Amended and Restated Credit Agreement, dated May 7, 2013, by and among Ensco plc, and Pride International, Inc., as Borrowers, the Banks named therein, Citibank, N.A., as Administrative Agent, DNB Bank ASA, as Syndication Agent, Deutsche Bank Securities Inc., HSBC Bank USA, NA and Wells Fargo Bank, National Association, as Co-Documentation Agents, and Citigroup Global Markets Inc., DNB Markets, Inc., Deutsche Bank Securities Inc., HSBC Securities (USA) Inc. and Wells Fargo Securities, LLC, as Joint Lead Arrangers and Joint Book Managers (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on May 13, 2013, File No. 1-8097).
10.2	First Amendment to the Fourth Amended and Restated Credit Agreement, dates as of September 30, 2014, by and among Ensco plc, and Pride International, Inc., the lenders named therein, and Citibank, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report filed on Form 8-K on October 1, 2014 File No. 1-8097).
+10.3	Pride International, Inc. 1998 Long-Term Incentive Plan (As Amended and Restated Effective February 17, 2005) (incorporated by reference to Exhibit 10.21 to Pride's Annual Report on Form 10-K for the year ended December 31, 2004, File No. 1-13289).
+10.4	Amendment to Pride International, Inc. 1998 Long-Term Incentive Plan (As Amended and Restated Effective February 17, 2005) (incorporated by reference to Exhibit 4.37 to the Registrant's Registration Statement on Form S-8 filed on May 31, 2011, File No. 333-174611).
+10.5	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), effective 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).
+10.6	Pride International, Inc. 2004 Directors' Stock Incentive Plan (As Amended and Restated Effective March 26, 2008) (incorporated by reference to Appendix B to Pride's Proxy Statement on Schedule 14A filed on April 9, 2008, File No. 1-13289).
+10.7	First Amendment to the Pride International, Inc. 2004 Directors' Stock Incentive Plan (As Amended and Restated March 26, 2008), effective August 14, 2008 (incorporated by reference to Exhibit 10.2 to Pride's Quarterly Report on Form 10-Q for the quarter ended September 30, 2008, File No. 1-13289).
+10.8	Amendment to the Pride International, Inc. 2004 Directors' Stock Incentive Plan (As Amended and Restated Effective March 26, 2008), effective May 31, 2011 (incorporated by reference to Exhibit 4.36 to the Registrant's Registration Statement on Form S-8 filed on May 31, 2011, File No. 333-174611).
+10.9	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), effective 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).
+10.10	Pride International, Inc. 2007 Long-Term Incentive Plan (As Amended and Restated Effective March 24, 2010) (incorporated by reference to Appendix A to Pride's Proxy Statement on Schedule 14A filed on April 1, 2010, File No. 1-13289).
+10.11	First Amendment to Pride International, Inc. 2007 Long-Term Incentive Plan (As Amended and Restated Effective March 16, 2010), effective August 13, 2010 (incorporated by reference to Exhibit 10.1 to Pride's Quarterly Report on Form 10-Q for the quarter ended September 30, 2010, File No. 1-13289).
+10.12	Amendment to the Pride International, Inc. 2007 Long-Term Incentive Plan (As Amended and Restated Effective March 16, 2010), effective May 31, 2011 (incorporated by reference to Exhibit 4.35 to the Registrant's Registration Statement on Form S-8 filed on May 31, 2011, File No. 333-174611).
+10.13	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), effective 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).
+10.14	Deed of Assumption by Ensco plc relating to Equity Incentive Plans of Pride International, Inc., dated May 26, 2011 (incorporated by reference to Exhibit 4.34 to the Registrant's Registration Statement on Form S-8 filed on May 31, 2011, File No. 333-174611).
+10.15	Form of Deed of Release of Directors (incorporated by reference to Annex B to the Registrant's Proxy Statement on Schedule 14A filed on April 5, 2011, File No. 1-8097).

141

+10.16	Form of Deed of Indemnity for Directors and Executive Officers of Ensco plc (incorporated by reference to Exhibit 10.27 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2011, File No. 1-8097).
+10.17	ENSCO International Incorporated 1998 Incentive Plan (incorporated by reference to Exhibit 4.1 to the Registrant's Form S-8 filed on July 7, 1998, File No. 333-58625).
+10.18	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated January 1, 2003 (incorporated by reference to Exhibit 10.19 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2002, File No. 1-8097).
+10.19	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated November 9, 2005 (incorporated by reference to Exhibit 10.29 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2005, File No. 1-8097).
+10.20	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated May 31, 2006 (incorporated by reference to Exhibit 10.4 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2006, File No. 1-8097).
+10.21	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated December 22, 2009 (incorporated by reference to Exhibit 10.4 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.22	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated August 23, 2011 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2011, File No. 1-8097).
+10.23	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 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).
+10.24	ENSCO International Incorporated 2000 Stock Option Plan, dated June 22, 2000 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 4.6 to the Registrant's Registration Statement on Form S-8 filed on August 7, 2002, File No. 333-97757).
+10.25	Amendment No. 1 to the ENSCO International Incorporated 2000 Stock Option Plan, dated November 13, 2000 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 4.7 to the Registrant's Registration Statement on Form S-8 filed on August 7, 2002, File No. 333-97757).
+10.26	Amendment No. 2 to the ENSCO International Incorporated 2000 Stock Option Plan, dated August 7, 2002 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 4.8 to the Registrant's Registration Statement on Form S-8 filed on August 7, 2002, File No. 333-97757).
+10.27	Amendment No. 3 to the ENSCO International Incorporated 2000 Stock Option Plan, dated January 1, 2003 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 10.18 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2002, File No. 1-8097).
+10.28	Amendment No. 4 to the ENSCO International Incorporated 2000 Stock Option Plan, dated December 22, 2009 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 10.5 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.29	ENSCO Non-Employee Director Deferred Compensation Plan, effective January 1, 2004 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2003, File No. 1-8097).
+10.30	Amendment No. 1 to the ENSCO Non-Employee Director Deferred Compensation Plan, dated March 11, 2008 (incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2008, File No. 1-8097).
+10.31	Amendment No. 2 to the ENSCO Non-Employee Director Deferred Compensation Plan, dated August 4, 2009 (incorporated by reference to Exhibit 10.4 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, File No. 1-8097).

142

+10.32	Amendment No. 3 to the ENSCO Non-Employee Director Deferred Compensation Plan, dated December 22, 2009 (incorporated by reference to Exhibit 10.11 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.33	Amendment No. 4 to the ENSCO Non-Employee Director Deferred Compensation Plan, dated 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).
+10.34	ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004) (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2003, File No. 1-8097).
+10.35	Amendment No. 1 to the ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated March 11, 2008 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2008, File No. 1-8097).
+10.36	Amendment No. 2 to the ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated November 4, 2008 (incorporated by reference to Exhibit 10.57 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2008, File No. 1-8097).
+10.37	Amendment No. 3 to the ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated August 4, 2009 (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, File No. 1-8097).
+10.38	Amendment No. 4 to the ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated December 22, 2009 (incorporated by reference to Exhibit 10.10 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.39	Amendment No. 5 to the Ensco Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated 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).
+10.40	ENSCO Supplemental Executive Retirement Plan and Non-Employee Director Deferred Compensation Plan Trust Agreement (As Revised and Restated Effective January 1, 2004), dated August 27, 2003 (incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2003, File No. 1-8097).
+10.41	ENSCO 2005 Non-Employee Director Deferred Compensation Plan, effective January 1, 2005 (incorporated by reference to Exhibit 99.2 to the Registrant's Current Report on Form 8-K filed on January 5, 2005, File No. 1-8097).
+10.42	Amendment No. 1 to the ENSCO 2005 Non-Employee Director Deferred Compensation Plan, dated March 11, 2008 (incorporated by reference to Exhibit 10.4 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2008, File No. 1-8097).
+10.43	Amendment No. 2 to the ENSCO 2005 Non-Employee Director Deferred Compensation Plan, dated November 4, 2008 (incorporated by reference to Exhibit 10.60 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2008, File No. 1-8097).
+10.44	Amendment No. 3 to the ENSCO 2005 Non-Employee Director Deferred Compensation Plan, dated August 4, 2009 (incorporated by reference to Exhibit 10.5 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, File No. 1-8097).
+10.45	Amendment No. 4 to the ENSCO 2005 Non-Employee Director Deferred Compensation Plan, dated December 22, 2009 (incorporated by reference to Exhibit 10.9 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.46	Amendment No. 5 to the Ensco 2005 Non-Employee Director Deferred Compensation Plan, dated 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).
+10.47	ENSCO 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated November 4, 2008 (incorporated by reference to Exhibit 10.56 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2008, File No. 1-8097).

143

+10.48	Amendment No. 1 to the ENSCO 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated August 4, 2009 (incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, File No. 1-8097).
+10.49	Amendment No. 2 to the ENSCO 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated November 3, 2009 (incorporated by reference to Exhibit 10.31 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2009, File No. 1-8097).
+10.50	Amendment No. 3 to the ENSCO 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated December 22, 2009 (incorporated by reference to Exhibit 10.8 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.51	Amendment No. 4 to the Ensco 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated 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).
+10.52	Amendment No. 5 to the Ensco 2005 Amended and Restated Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated 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).
+10.53	ENSCO 2005 Benefit Reserve Trust, effective January 1, 2005 (incorporated by reference to Exhibit 99.3 to the Registrant's Current Report on Form 8-K filed on January 5, 2005, File No. 1-8097).
+10.54	Deed of Assumption relating to Equity Incentive Plans of ENSCO International Incorporated, dated December 22, 2009, executed by Ensco International plc (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.55	ENSCO International Incorporated 2005 Long-Term Incentive Plan (As Revised and Restated on December 22, 2009 and As Assumed by Ensco International plc as of December 23, 2009), effective December 23, 2009 (incorporated by reference to Exhibit 10.3 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.56	First 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 March 1, 2011 (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the period ending March 31, 2011, File No. 1-8097).
+10.57	Second 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), effective August 23, 2011 (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the period ending September 30, 2011, File No. 1-8097).
+10.58	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 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).
+10.59	Fourth 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 January 1, 2013 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the period ending June 30, 2013, File No. 1-8097).
+10.60	Form of ENSCO International Incorporated 2005 Long-Term Incentive Plan Performance Unit Award Agreement Terms and Conditions (incorporated by reference to Exhibit 10.7 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.61	Form of Ensco Performance-Based Long-Term Incentive Award Summary (incorporated by reference to Exhibit 10.6 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
*+10.62	Amended and Restated ENSCO International Incorporated 2005 Cash Incentive Plan, dated November 10, 2014.
+10.63	Form of ENSCO International Incorporated Director Indemnification Agreement (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).

144

+10.64	Form of ENSCO International Incorporated Executive Officer Indemnification Agreement (incorporated by reference to Exhibit 10.2 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.65	Form of ENSCO International Incorporated Director and/or Officer Indemnification Agreement with Daniel W. Rabun (incorporated by reference to Exhibit 10.3 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.66	Form of ENSCO International Incorporated Director and/or Officer Indemnification Agreement with John Mark Burns (incorporated by reference to Exhibit 10.4 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.67	Form of Indemnification Agreement of ENSCO International Incorporated (incorporated by reference to Exhibit 10.12 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.68	Form of Deed of Indemnity of Ensco International plc (incorporated by reference to Exhibit 10.13 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.69	Employment Offer Letter Agreement between ENSCO International Incorporated and Daniel W. Rabun, dated January 13, 2006 and accepted on February 6, 2006 (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on February 6, 2006, File No. 1-8097).
+10.70	Amendment to the Employment Offer Letter Agreement between ENSCO International Incorporated and Daniel W. Rabun, dated December 22, 2009 (incorporated by reference to Exhibit 10.15 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.71	Restated and Superseding Employment Agreement, dated as of November 13, 2013, between Daniel W. Rabun and Ensco plc (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on November 19, 2013, File No. 1-8097).
+10.72	Employment Offer Letter between ENSCO International Incorporated and Mark Burns, dated May 19, 2008 and accepted on May 22, 2008 (incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2008, File No. 1-8097).
+10.73	Employment Offer Letter between ENSCO International Incorporated and Carey Lowe, dated June 23, 2008 and accepted July 22, 2008 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2008, File No. 1-8097).
+10.74	Summary of Relocation Benefits of Certain Executive Officers (incorporated by reference to Item 5.02 to the Registrant's Current Report on Form 8-K filed on December 1, 2009, File No. 1-8097).
+10.75	Ensco plc 2012 Long-Term Incentive Plan, effective January 1, 2012 (incorporated by reference to Annex A to the Registrant's Proxy Statement filed on April 4, 2012, File No. 1-8097).
+10.80	First Amendment to the Ensco plc 2012 Long-Term Incentive Plan, effective August 21, 2012 (incorporated by reference to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2012, File No. 1-8097).
+10.81	Second Amendment to the Ensco plc 2012 Long-Term Incentive Plan, effective January 1, 2013 (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2013, File No. 1-8097).
+10.82	Separation Agreement, dated as of January 10, 2014, between Kevin C. Robert and Ensco plc.(incorporated by reference to Exhibit 10.80 of the Registrant's Annual Report on Form 10-K filed on February 26, 2014, File No. 1-8097).
+10.83	Deed of Variation among Ensco Global Resources Limited, Carl Trowell and Ensco Services Limited, dated June 2, 2014, together with the Employment Agreement between Ensco Global Resources Limited and Carl Trowell, dated May 3, 2014 and attached as a schedule to the Deed of Variation (incorporated by reference to Exhibit 10.1 of the Registrant's Quarterly Report on Form 10-Q filed on August 1, 2014, File No. 1-8097).
+10.84	Form of Deed of Indemnity entered into between Ensco plc and Carl Trowell as of June 2, 2014 (incorporated by reference to Exhibit 10.2 of the Registrant's Quarterly Report on Form 10-Q filed on August 1, 2014, File No. 1-8097).
*12.1	Computation of ratio of earnings to fixed charges.
*21.1	Subsidiaries of the Registrant.

145

*23.1	Consent of Independent Registered Public Accounting Firm.
*31.1	Certification of the Chief Executive Officer of Registrant pursuant to Rule 13a-14 or 15d-14 of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification of the Chief Financial Officer of Registrant pursuant to Rule 13a-14 or 15d-14 of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
**32.1	Certification of the Chief Executive Officer of Registrant pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
**32.2	Certification of the Chief Financial Officer of Registrant pursuant to 18 U.S.C. Section 1350, as adopted 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. Management contracts or compensatory plans and arrangements required to be filed as exhibits pursuant to Item 15(b) of this report.

Certain agreements relating to our long-term debt have not been filed as exhibits as permitted by paragraph (b)(4)(iii)(A) of Item 601 of Regulation S-K since the total amount of securities authorized under any such agreements do not exceed 10% of our total assets on a consolidated basis. Upon request, we will furnish to the SEC all constituent agreements defining the rights of holders of our long-term debt not filed herewith.

146

PART IV

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) 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, on March 2, 2015.

                       Ensco plc

                       (Registrant)

By   /s/         CARL G. TROWELL                                      

                     Carl G. Trowell

                     President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons on behalf of the Registrant and in the capacities and on the date indicated.

Signatures	Title	Date
/s/     CARL G. TROWELL                            Carl G. Trowell	Chief Executive Officer and President	March 2, 2015
/s/     DANIEL W. RABUN                            Daniel W. Rabun	Chairman	March 2, 2015
/s/     J. RODERICK CLARK                         J. Roderick Clark	Director	March 2, 2015
/s/     MARY E. FRANCIS CBE               Mary E. Francis CBE	Director	March 2, 2015
/s/     GERALD W. HADDOCK                     Gerald W. Haddock	Director	March 2, 2015
/s/     FRANCIS S. KALMAN                     Francis S. Kalman	Director	March 2, 2015
/s/     KEITH O. RATTIE                          Keith O. Rattie	Director	March 2, 2015
/s/     PAUL E. ROWSEY, III                         Paul E. Rowsey, III	Director	March 2, 2015
/s/     JAMES W. SWENT III                         James W. Swent III	Executive Vice President and     Chief Financial Officer     (principal financial officer)	March 2, 2015
/s/     JONATHAN H. BAKSHT             Jonathan H. Baksht	Vice President - Finance	March 2, 2015
/s/     ROBERT W. EDWARDS III                 Robert W. Edwards III	Controller (principal accounting officer)	March 2, 2015

147

INDEX TO EXHIBITS

Exhibit         Number	Exhibit
2.1	Agreement and Plan of Merger and Reorganization, dated November 9, 2009, between ENSCO International Incorporated and ENSCO Newcastle LLC (incorporated by reference to Annex A to the Registration Statement of ENSCO International Limited on Form S-4 filed on November 9, 2009, File No. 333-162975).
2.2	Agreement and Plan of Merger, dated  February 6, 2011, among Ensco plc, ENSCO Ventures LLC, ENSCO International Incorporated and Pride International, Inc. (incorporated by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K filed on February 7, 2011, File No. 1-8097).
2.3	Amendment No. 1 to Agreement and Plan of Merger, dated March 1, 2011, by and among Ensco plc, Pride International, Inc., ENSCO Ventures LLC and ENSCO International Incorporated (incorporated by reference to Exhibit 2.2 to the Registrant's Registration Statement on Form S-4 filed on March 3, 2011, File No. 333-172587).
2.4	Amendment No. 2 to Agreement and Plan of Merger, dated May 23, 2011, by and among Ensco plc, Pride International, Inc., ENSCO International Incorporated and ENSCO Ventures LLC (incorporated by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K filed on May 24, 2011, File No.1-8097).
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 (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).
3.3	New Articles of Association of Ensco plc (incorporated by reference to Annex 2 to the Registrant's Proxy Statement on Form DEF 14A filed on April 5, 2013, as adopted by Special Resolution passed on May 20, 2013, File No. 1-8097).
4.1	Indenture, dated November 20, 1997, between ENSCO International Incorporated and Deutsche Bank Trust Company Americas (successor to Bankers Trust Company), as Trustee (incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K filed on November 24, 1997, File No. 1-8097).
4.2	First Supplemental Indenture, dated November 20, 1997, between ENSCO International Incorporated and Deutsche Bank Trust Company Americas (successor to Bankers Trust Company, as Trustee (incorporated by reference to Exhibit 4.2 to the Registrant's Current Report on Form 8-K, filed on November 24, 1997, File No. 1-8097).
4.3	Second Supplemental Indenture, dated December 22, 2009, among ENSCO International Incorporated, Ensco International plc and Deutsche Bank Trust Company Americas, as Trustee (incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
4.4	Form of Debenture (incorporated by reference to Exhibit 4.4 to the Registrant's Current Report on Form 8-K filed on November 24, 1997, File No. 1-8097).
4.5	Indenture, dated July 1, 2004, between Pride International, Inc. and The Bank of New York Mellon, as Trustee, including the form of notes issued pursuant thereto (successor to JPMorgan Chase Bank) (incorporated by reference to Exhibit 4.1 to Pride's Registration Statement on Form S-4 filed on August 10, 2004, File No. 333-118104).
4.6	First Supplemental Indenture, dated July 7, 2004, between Pride International, Inc. and The Bank of New York Mellon (successor to JPMorgan Chase Bank), as Trustee, including the form of note issued pursuant thereto (incorporated by reference to Exhibit 4.2 to Pride's Registration Statement on Form S-4 filed on August 10, 2004, File No. 333-118104).
4.7	Second Supplemental Indenture, dated June 2, 2009, between Pride International, Inc. and The Bank of New York Mellon, as Trustee, including the form of notes issued pursuant thereto (incorporated by reference to Exhibit 4.1 to Pride's Quarterly Report on Form 10-Q for the quarter ended June 30, 2009, File No. 1-13289).

148

4.8	Third Supplemental Indenture, dated August 6, 2010, between Pride International, Inc. and The Bank of New York Mellon, as Trustee, including the form of notes issued pursuant thereto (incorporated by reference to Exhibit 4.3 to Pride's Quarterly Report on Form 10-Q for the quarter ended September 30, 2010, File No. 1-13289).
4.9	Fourth Supplemental Indenture, dated May 31, 2011, among Ensco plc, Pride International, Inc. and The Bank of New York Mellon, as Trustee (incorporated by reference to Exhibit 4.4 to the Registrant's Current Report on Form 8-K filed on May 31, 2011, File No. 1-8097).
4.10	Form of Guarantee by Ensco plc (incorporated by reference to Exhibit 4.4  to the Registrant's Current Report on Form 8-K filed on May 31, 2011, File No. 1-8097).
4.11	Indenture, dated March 17, 2011, between Ensco plc and Deutsche Bank Trust Company Americas, as Trustee (incorporated by reference to Exhibit 4.22 to Post-Effective Amendment No. 2 to the Registrant's Registration Statement on Form S-3 filed on March 17, 2011, File No. 333-156705).
4.12	First Supplemental Indenture, dated March 17, 2011, between Ensco plc and Deutsche Bank Trust Company Americas, as Trustee (incorporated by reference to Exhibit 4.23 to Post-Effective Amendment No. 2 to the Registrant's Registration Statement on Form S-3 filed on March 17, 2011, File No. 333-156705).
4.13	Second Supplemental Indenture, dated as of September 29, 2014, between Ensco plc and Deutsche Bank Trust Company Americas, as Trustee (incorporated by reference to Exhibit 4.1 to the Registrant's Quarterly Report on Form 10-Q filed on October 30, 2014, File No.1-8097).
4.14	Form of Note for 4.50% Senior Notes due 2024 (incorporated by reference to Exhibit 4.2 to the Registrant's Quarterly Report on Form 10-Q filed on October 30, 2014, File No.1-8097).
4.15	Form of Note for 5.75% Senior Notes due 2044 (incorporated by reference to Exhibit 4.3 to the Registrant's Quarterly Report on Form 10-Q filed on October 30, 2014, File No.1-8097).
4.16	Form of Global Note for 3.250% Senior Notes due 2016 (incorporated by reference to Exhibit A of Exhibit 4.23 to Post-Effective Amendment No. 2 to the Registrant's Registration Statement on Form S-3 filed on March 17, 2011, File No. 333-156705).
4.17	Form of Global Note for 4.700% Senior Notes due 2021 (incorporated by reference to Exhibit B of Exhibit 4.23 to Post-Effective Amendment No. 2 to the Registrant's Registration Statement on Form S-3 filed on March 17, 2011, File No. 333-156705).
4.18	Form of Deed of Release of Shareholders (incorporated by reference to Annex A to the Registrant's Proxy Statement on Schedule 14A filed on April 5, 2011, File No. 1-8097).
10.1	Fourth Amended and Restated Credit Agreement, dated May 7, 2013, by and among Ensco plc, and Pride International, Inc., as Borrowers, the Banks named therein, Citibank, N.A., as Administrative Agent, DNB Bank ASA, as Syndication Agent, Deutsche Bank Securities Inc., HSBC Bank USA, NA and Wells Fargo Bank, National Association, as Co-Documentation Agents, and Citigroup Global Markets Inc., DNB Markets, Inc., Deutsche Bank Securities Inc., HSBC Securities (USA) Inc. and Wells Fargo Securities, LLC, as Joint Lead Arrangers and Joint Book Managers (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on May 13, 2013, File No. 1-8097).
10.2	First Amendment to the Fourth Amended and Restated Credit Agreement, dates as of September 30, 2014, by and among Ensco plc, and Pride International, Inc., the lenders named therein, and Citibank, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report filed on Form 8-K on October 1, 2014 File No. 1-8097).
+10.3	Pride International, Inc. 1998 Long-Term Incentive Plan (As Amended and Restated Effective February 17, 2005) (incorporated by reference to Exhibit 10.21 to Pride's Annual Report on Form 10-K for the year ended December 31, 2004, File No. 1-13289).
+10.4	Amendment to Pride International, Inc. 1998 Long-Term Incentive Plan (As Amended and Restated Effective February 17, 2005) (incorporated by reference to Exhibit 4.37 to the Registrant's Registration Statement on Form S-8 filed on May 31, 2011, File No. 333-174611).
+10.5	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), effective 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).

149

+10.6	Pride International, Inc. 2004 Directors' Stock Incentive Plan (As Amended and Restated Effective March 26, 2008) (incorporated by reference to Appendix B to Pride's Proxy Statement on Schedule 14A filed on April 9, 2008, File No. 1-13289).
+10.7	First Amendment to the Pride International, Inc. 2004 Directors' Stock Incentive Plan (As Amended and Restated March 26, 2008), effective August 14, 2008 (incorporated by reference to Exhibit 10.2 to Pride's Quarterly Report on Form 10-Q for the quarter ended September 30, 2008, File No. 1-13289).
+10.8	Amendment to the Pride International, Inc. 2004 Directors' Stock Incentive Plan (As Amended and Restated Effective March 26, 2008), effective May 31, 2011 (incorporated by reference to Exhibit 4.36 to the Registrant's Registration Statement on Form S-8 filed on May 31, 2011, File No. 333-174611).
+10.9	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), effective 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).
+10.10	Pride International, Inc. 2007 Long-Term Incentive Plan (As Amended and Restated Effective March 24, 2010) (incorporated by reference to Appendix A to Pride's Proxy Statement on Schedule 14A filed on April 1, 2010, File No. 1-13289).
+10.11	First Amendment to Pride International, Inc. 2007 Long-Term Incentive Plan (As Amended and Restated Effective March 16, 2010), effective August 13, 2010 (incorporated by reference to Exhibit 10.1 to Pride's Quarterly Report on Form 10-Q for the quarter ended September 30, 2010, File No. 1-13289).
+10.12	Amendment to the Pride International, Inc. 2007 Long-Term Incentive Plan (As Amended and Restated Effective March 16, 2010), effective May 31, 2011 (incorporated by reference to Exhibit 4.35 to the Registrant's Registration Statement on Form S-8 filed on May 31, 2011, File No. 333-174611).
+10.13	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), effective 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).
+10.14	Deed of Assumption by Ensco plc relating to Equity Incentive Plans of Pride International, Inc., dated May 26, 2011 (incorporated by reference to Exhibit 4.34 to the Registrant's Registration Statement on Form S-8 filed on May 31, 2011, File No. 333-174611).
+10.15	Form of Deed of Release of Directors (incorporated by reference to Annex B to the Registrant's Proxy Statement on Schedule 14A filed on April 5, 2011, File No. 1-8097).
+10.16	Form of Deed of Indemnity for Directors and Executive Officers of Ensco plc (incorporated by reference to Exhibit 10.27 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2011, File No. 1-8097).
+10.17	ENSCO International Incorporated 1998 Incentive Plan (incorporated by reference to Exhibit 4.1 to the Registrant's Form S-8 filed on July 7, 1998, File No. 333-58625).
+10.18	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated January 1, 2003 (incorporated by reference to Exhibit 10.19 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2002, File No. 1-8097).
+10.19	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated November 9, 2005 (incorporated by reference to Exhibit 10.29 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2005, File No. 1-8097).
+10.20	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated May 31, 2006 (incorporated by reference to Exhibit 10.4 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2006, File No. 1-8097).
+10.21	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated December 22, 2009 (incorporated by reference to Exhibit 10.4 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.22	Amendment to the ENSCO International Incorporated 1998 Incentive Plan, dated August 23, 2011 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2011, File No. 1-8097).

150

+10.23	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 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).
+10.24	ENSCO International Incorporated 2000 Stock Option Plan, dated June 22, 2000 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 4.6 to the Registrant's Registration Statement on Form S-8 filed on August 7, 2002, File No. 333-97757).
+10.25	Amendment No. 1 to the ENSCO International Incorporated 2000 Stock Option Plan, dated November 13, 2000 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 4.7 to the Registrant's Registration Statement on Form S-8 filed on August 7, 2002, File No. 333-97757).
+10.26	Amendment No. 2 to the ENSCO International Incorporated 2000 Stock Option Plan, dated August 7, 2002 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 4.8 to the Registrant's Registration Statement on Form S-8 filed on August 7, 2002, File No. 333-97757).
+10.27	Amendment No. 3 to the ENSCO International Incorporated 2000 Stock Option Plan, dated January 1, 2003 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 10.18 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2002, File No. 1-8097).
+10.28	Amendment No. 4 to the ENSCO International Incorporated 2000 Stock Option Plan, dated December 22, 2009 (formerly known as the Chiles Offshore Inc. 2000 Stock Option Plan) (incorporated by reference to Exhibit 10.5 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.29	ENSCO Non-Employee Director Deferred Compensation Plan, effective January 1, 2004 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2003, File No. 1-8097).
+10.30	Amendment No. 1 to the ENSCO Non-Employee Director Deferred Compensation Plan, dated March 11, 2008 (incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2008, File No. 1-8097).
+10.31	Amendment No. 2 to the ENSCO Non-Employee Director Deferred Compensation Plan, dated August 4, 2009 (incorporated by reference to Exhibit 10.4 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, File No. 1-8097).
+10.32	Amendment No. 3 to the ENSCO Non-Employee Director Deferred Compensation Plan, dated December 22, 2009 (incorporated by reference to Exhibit 10.11 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.33	Amendment No. 4 to the ENSCO Non-Employee Director Deferred Compensation Plan, dated 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).
+10.34	ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004) (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2003, File No. 1-8097).
+10.35	Amendment No. 1 to the ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated March 11, 2008 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2008, File No. 1-8097).
+10.36	Amendment No. 2 to the ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated November 4, 2008 (incorporated by reference to Exhibit 10.57 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2008, File No. 1-8097).
+10.37	Amendment No. 3 to the ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated August 4, 2009 (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, File No. 1-8097).
+10.38	Amendment No. 4 to the ENSCO Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated December 22, 2009 (incorporated by reference to Exhibit 10.10 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).

151

+10.39	Amendment No. 5 to the Ensco Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2004), dated 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).
+10.40	ENSCO Supplemental Executive Retirement Plan and Non-Employee Director Deferred Compensation Plan Trust Agreement (As Revised and Restated Effective January 1, 2004), dated August 27, 2003 (incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2003, File No. 1-8097).
+10.41	ENSCO 2005 Non-Employee Director Deferred Compensation Plan, effective January 1, 2005 (incorporated by reference to Exhibit 99.2 to the Registrant's Current Report on Form 8-K filed on January 5, 2005, File No. 1-8097).
+10.42	Amendment No. 1 to the ENSCO 2005 Non-Employee Director Deferred Compensation Plan, dated March 11, 2008 (incorporated by reference to Exhibit 10.4 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2008, File No. 1-8097).
+10.43	Amendment No. 2 to the ENSCO 2005 Non-Employee Director Deferred Compensation Plan, dated November 4, 2008 (incorporated by reference to Exhibit 10.60 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2008, File No. 1-8097).
+10.44	Amendment No. 3 to the ENSCO 2005 Non-Employee Director Deferred Compensation Plan, dated August 4, 2009 (incorporated by reference to Exhibit 10.5 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, File No. 1-8097).
+10.45	Amendment No. 4 to the ENSCO 2005 Non-Employee Director Deferred Compensation Plan, dated December 22, 2009 (incorporated by reference to Exhibit 10.9 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.46	Amendment No. 5 to the Ensco 2005 Non-Employee Director Deferred Compensation Plan, dated 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).
+10.47	ENSCO 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated November 4, 2008 (incorporated by reference to Exhibit 10.56 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2008, File No. 1-8097).
+10.48	Amendment No. 1 to the ENSCO 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated August 4, 2009 (incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2009, File No. 1-8097).
+10.49	Amendment No. 2 to the ENSCO 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated November 3, 2009 (incorporated by reference to Exhibit 10.31 to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2009, File No. 1-8097).
+10.50	Amendment No. 3 to the ENSCO 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated December 22, 2009 (incorporated by reference to Exhibit 10.8 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.51	Amendment No. 4 to the Ensco 2005 Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated 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).
+10.52	Amendment No. 5 to the Ensco 2005 Amended and Restated Supplemental Executive Retirement Plan (As Amended and Restated Effective January 1, 2005), dated 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).
+10.53	ENSCO 2005 Benefit Reserve Trust, effective January 1, 2005 (incorporated by reference to Exhibit 99.3 to the Registrant's Current Report on Form 8-K filed on January 5, 2005, File No. 1-8097).
+10.54	Deed of Assumption relating to Equity Incentive Plans of ENSCO International Incorporated, dated December 22, 2009, executed by Ensco International plc (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.55	ENSCO International Incorporated 2005 Long-Term Incentive Plan (As Revised and Restated on December 22, 2009 and As Assumed by Ensco International plc as of December 23, 2009), effective December 23, 2009 (incorporated by reference to Exhibit 10.3 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).

152

+10.56	First 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 March 1, 2011 (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the period ending March 31, 2011, File No. 1-8097).
+10.57	Second 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), effective August 23, 2011 (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the period ending September 30, 2011, File No. 1-8097).
+10.58	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 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).
+10.59	Fourth 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 January 1, 2013 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the period ending June 30, 2013, File No. 1-8097).
+10.60	Form of ENSCO International Incorporated 2005 Long-Term Incentive Plan Performance Unit Award Agreement Terms and Conditions (incorporated by reference to Exhibit 10.7 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.61	Form of Ensco Performance-Based Long-Term Incentive Award Summary (incorporated by reference to Exhibit 10.6 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
*+10.62	Amended and Restated ENSCO International Incorporated 2005 Cash Incentive Plan, dated November 10, 2014.
+10.63	Form of ENSCO International Incorporated Director Indemnification Agreement (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.64	Form of ENSCO International Incorporated Executive Officer Indemnification Agreement (incorporated by reference to Exhibit 10.2 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.65	Form of ENSCO International Incorporated Director and/or Officer Indemnification Agreement with Daniel W. Rabun (incorporated by reference to Exhibit 10.3 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.66	Form of ENSCO International Incorporated Director and/or Officer Indemnification Agreement with John Mark Burns (incorporated by reference to Exhibit 10.4 to the Registrant's Current Report on Form 8-K filed on November 6, 2009, File No. 1-8097).
+10.67	Form of Indemnification Agreement of ENSCO International Incorporated (incorporated by reference to Exhibit 10.12 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.68	Form of Deed of Indemnity of Ensco International plc (incorporated by reference to Exhibit 10.13 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.69	Employment Offer Letter Agreement between ENSCO International Incorporated and Daniel W. Rabun, dated January 13, 2006 and accepted on February 6, 2006 (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on February 6, 2006, File No. 1-8097).
+10.70	Amendment to the Employment Offer Letter Agreement between ENSCO International Incorporated and Daniel W. Rabun, dated December 22, 2009 (incorporated by reference to Exhibit 10.15 to the Registrant's Current Report on Form 8-K filed on December 23, 2009, File No. 1-8097).
+10.71	Restated and Superseding Employment Agreement, dated as of November 13, 2013, between Daniel W. Rabun and Ensco plc (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed on November 19, 2013, File No. 1-8097).
+10.72	Employment Offer Letter between ENSCO International Incorporated and Mark Burns, dated May 19, 2008 and accepted on May 22, 2008 (incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2008, File No. 1-8097).

153

+10.73	Employment Offer Letter between ENSCO International Incorporated and Carey Lowe, dated June 23, 2008 and accepted July 22, 2008 (incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2008, File No. 1-8097).
+10.74	Summary of Relocation Benefits of Certain Executive Officers (incorporated by reference to Item 5.02 to the Registrant's Current Report on Form 8-K filed on December 1, 2009, File No. 1-8097).
+10.75	Ensco plc 2012 Long-Term Incentive Plan, effective January 1, 2012 (incorporated by reference to Annex A to the Registrant's Proxy Statement filed on April 4, 2012, File No. 1-8097).
+10.76	First Amendment to the Ensco plc 2012 Long-Term Incentive Plan, effective August 21, 2012 (incorporated by reference to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2012, File No. 1-8097).
+10.77	Second Amendment to the Ensco plc 2012 Long-Term Incentive Plan, effective January 1, 2013 (incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2013, File No. 1-8097).
+10.78	Separation Agreement, dated as of January 10, 2014, between Kevin C. Robert and Ensco plc.(incorporated by reference to Exhibit 10.80 of the Registrant's Annual Report on Form 10-K filed on February 26, 2014, File No. 1-8097).
+10.79	Deed of Variation among Ensco Global Resources Limited, Carl Trowell and Ensco Services Limited, dated June 2, 2014, together with the Employment Agreement between Ensco Global Resources Limited and Carl Trowell, dated May 3, 2014 and attached as a schedule to the Deed of Variation (incorporated by reference to Exhibit 10.1 of the Registrant's Quarterly Report on Form 10-Q filed on August 1, 2014, File No. 1-8097).
+10.80	Form of Deed of Indemnity entered into between Ensco plc and Carl Trowell as of June 2, 2014 (incorporated by reference to Exhibit 10.2 of the Registrant's Quarterly Report on Form 10-Q filed on August 1, 2014, File No. 1-8097).
*12.1	Computation of ratio of earnings to fixed charges.
*21.1	Subsidiaries of the Registrant.
*23.1	Consent of Independent Registered Public Accounting Firm.
*31.1	Certification of the Chief Executive Officer of Registrant pursuant to Rule 13a-14 or 15d-14 of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification of the Chief Financial Officer of Registrant pursuant to Rule 13a-14 or 15d-14 of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
**32.1	Certification of the Chief Executive Officer of Registrant pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
**32.2	Certification of the Chief Financial Officer of Registrant pursuant to 18 U.S.C. Section 1350, as adopted 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. Management contracts or compensatory plans and arrangements required to be filed as exhibits pursuant to Item 15(b) of this report.

154

Certain agreements relating to our long-term debt have not been filed as exhibits as permitted by paragraph (b)(4)(iii)(A) of Item 601 of Regulation S-K since the total amount of securities authorized under any such agreements do not exceed 10% of our total assets on a consolidated basis. Upon request, we will furnish to the SEC all constituent agreements defining the rights of holders of our long-term debt not filed herewith.

155

EX-10.62

EXHIBIT 10.62

ENSCO INTERNATIONAL INCORPORATED

2005 CASH INCENTIVE PLAN

(As Revised and Restated for Amendments Through November 10, 2014)

SECTION 1

ESTABLISHMENT AND PURPOSE

a.Purpose. This Plan is established (i) to offer selected Employees, including officers, of the Company or its Subsidiaries an opportunity to participate in the growth and financial success of the Company, (ii) to provide the Company an opportunity to attract and retain the best available personnel for positions of substantial responsibility, (iii) to provide incentives to such Employees by means of performance-related incentives to achieve short-term performance goals, and (iv) to promote the growth and success of the Company’s business by aligning the financial interests of Employees with that of the other stockholders of the Company. Toward these objectives, this Plan provides for the grant of Annual Performance Bonuses and Discretionary Bonuses.

b.Effective Date; Stockholder Approval. This Plan is effective as of January 1, 2005, subject to the prior approval of the Committee and by a vote at the Company’s 2005 Annual Meeting of Stockholders (the “2005 Annual Meeting”) of the owners of at least a majority of the shares of the common stock of the Company, present in person or by proxy and entitled to vote, and shall apply to the Annual Performance Bonuses and Discretionary Bonuses awarded to each Participant in respect of 2005 and thereafter. If this Plan is approved by the stockholders of the Company at the 2005 Annual Meeting, the ENSCO International Incorporated Key Employees’ Incentive Compensation Plan, as revised and restated effective January 1, 2003 (the “KEIP”), shall be frozen and no additional bonuses shall be awarded under the KEIP, but the KEIP shall continue to apply to and govern the determination and payment of bonuses awarded under the KEIP for fiscal years of the Company beginning prior to January 1, 2005. Any Annual Performance Bonus awarded under this Plan to a Covered Employee will be contingent on the approval of this Plan by the Company’s stockholders. If their approval is not obtained, any Annual Performance Bonuses awarded under this Plan to a Covered Employee will be rescinded.

SECTION 2

DEFINITIONS

For purposes of this Plan, the following terms have the following meanings, unless another definition is clearly indicated by particular usage and context:

“Annual Performance Bonus” shall mean an Award of cash granted under Section 5 of this Plan that is paid solely on account of the attainment of a specified performance target in relation to one or more Performance Goals.

“Award” shall mean any Annual Performance Bonus or Discretionary Bonus, whether granted singly, in combination or in tandem, to a Participant pursuant to such applicable terms, conditions, and limitations as the Committee may establish and set forth in the applicable Award Notice in order to fulfill the objectives of this Plan.

“Award Notice” shall mean the document issued, either in writing or an electronic medium, by the Committee to a Participant evidencing the grant of an Award, and setting forth the terms, conditions and limitations applicable to that Award, including any amendments thereto.

“Board” shall mean the board of directors of the Company, as duly elected from time to time.

“Change in Control” shall mean the occurrence of any of the following events: (a) a change in the ownership of the Company, which occurs on the date that any one person, or more than one person acting as a group, acquires ownership of stock of the Company that, together with stock held by such person or group, constitutes more than 50% of the total voting power of the stock of the Company, or (b) a majority of the members of the Board is replaced during any 12-month period by directors whose appointment or election is not endorsed by a majority of the members of the Board prior to the date of the appointment or election. The determination of whether a Change in Control has occurred shall be determined by the Committee consistent with Section 409A of the Code.

Notwithstanding the foregoing, a “Change in Control” of the Company shall not be deemed to have occurred by virtue of the consummation of any transaction or series of related transactions immediately following which the beneficial owners of the voting stock of the Company immediately before such transaction or series of transactions continue to have a majority of the direct or indirect ownership in one or more entities which, singly or together, immediately following such transaction or series of transactions, either (a) own all or substantially all of the assets of the Company as constituted immediately prior to such transaction or series of transactions, or (b) are the ultimate parent with direct or indirect ownership of all of the voting stock of the Company after such transaction or series of transactions.

“Code” shall mean the Internal Revenue Code of 1986, as amended, and as interpreted by the regulations thereunder.

“Committee” shall mean the Nominating, Governance and Compensation Committee of the Board, or such other Committee as may be appointed by the Board from time to time, which shall be comprised solely of two or more persons who are Disinterested Directors. The Chief Executive Officer of the Company, or such other officers of the Company as may be designated by the Chief Executive Officer of the Company from time to time, may assume any or all of the powers and responsibilities prescribed for the Committee with respect to Awards to Employees who are not Covered Employees or officers of the Company, and to that extent, the term “Committee” as used herein shall also be applicable to the Chief Executive Officer or such other designated officers.

“Company” shall mean ENSCO International Incorporated, a Delaware corporation, or any successor thereto.

“Covered Employee” shall mean, effective January 1, 2007, an Employee who would be subject to Section 162(m) of the Code such that on the last day of the taxable year, the Employee (a) is the principal executive officer of the Company (or is acting in such capacity), or (b) if the total compensation of such Employee for that taxable year is required to be reported to stockholders of the Company under the Exchange Act by reason of such Employee being among the three highest compensated officers of the Company for the taxable year (other than the principal executive officer or the principal financial officer of the Company) as determined pursuant to the executive compensation disclosure rules under the Exchange Act contained in Item 402 of Regulation S-K, as amended by the Securities and Exchange Commission on September 8, 2006.

“Director” shall mean a member of the Board.

“Discretionary Bonuses” shall mean the amount, if any, awarded to a Participant during a Performance Period by the Committee pursuant to Section 6.

“Disinterested Director” shall mean a member of the Board who is (a) a “non-employee director,” within the meaning of Rule 16b‑3(b)(3) promulgated under the Exchange Act, (b) an “outside director,” within the meaning of Section 162(m)(4)(C)(i) of the Code, and (c) “independent” within the meaning of the applicable rules and regulations of the Securities and Exchange Commission and the New York Stock Exchange (or, in each case, any successor provision or term).

“Effective Date” shall mean January 1, 2005.

“Employee” shall include every individual performing Services for the Company or its Subsidiaries if the relationship between such individual and the Company or its Subsidiaries is the legal relationship of employer and employee. This definition of “Employee” is qualified in its entirety and is subject to the definition set forth in Section 3401(c) of the Code.

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended, and as interpreted by the rules and regulations promulgated thereunder.

“GAAP” means generally accepted accounting principles.

“Incentive Award” shall mean the total of each Participant’s Annual Performance Bonus Award plus his or her Discretionary Bonus Award, if any, for that Performance Period.

“Normal Retirement Age” shall mean with respect to a Participant the later of (a) his or her 65^th birthday, or (b) the date a Participant has credit for a “period of service” under the ENSCO Savings Plan of at least twenty (20) years, considering for purposes of this Plan (i) with respect to any Participant hired before the Effective Date, any other prior service recognized previously by the Company as of his or her date of hire by the Company or any Subsidiary, and (ii) with respect to any Participant hired after the Effective Date, any other prior service recognized by the Committee. The Committee, in its discretion, may consider a Participant whose employment terminates after his or her 62^nd birthday but prior to satisfying the requirements specified in the preceding sentence to have retired on or after his or her Normal Retirement Age.

“Participants” shall mean those individuals described in Section 1 of this Plan selected by the Committee who are eligible under Section 4 of this Plan for grants of Awards.

“Performance Goals” shall mean, with respect to any Annual Performance Bonus, the business criteria (and related factors) selected by the Committee to measure the level of performance of the Company during the Performance Period, in each case, prepared on the same basis as the financial statements published for financial reporting purposes, except as adjusted pursuant to Section 5(e). The Committee may select as the Performance Goal for a Performance Period any one or combination of the following Company measures, as interpreted and defined by the Committee, which measures (to the extent applicable) will be determined in accordance with GAAP:

a.Net income as a percentage of revenue;

b.Earnings per share;

c.Return on net assets employed before interest and taxes (RONAEBIT);

d.Operating margin as a percentage of revenue;

e.Safety performance relative to industry standards and the Company annual target;

f.Strategic team goals;

g.Net operating profit after taxes;

h.Net operating profit after taxes per share;

i.Return on invested capital;

j.Return on assets or net assets;

k.Total stockholder return;

l.Relative total stockholder return (as compared with a peer group of the Company);

m.Earnings before income taxes;

n.Net income;

o.Free cash flow;

p.Free cash flow per share;

q.Revenue (or any component thereof);

r.Revenue growth; or

s. Any other performance objective approved by the stockholders of the Company in accordance with Section 162(m) of the Code.

As of the Effective Date, the Committee has determined to determine the earning of Annual Performance Bonuses on the attainment of a specific performance target in relation to one or more of the six Performance Goals listed above in paragraphs (a)-(f).

“Performance Period” shall mean that period established by the Committee at the time any Annual Performance Bonus is awarded or, except in the case of any award to a Covered Employee, at any time thereafter, during which any Performance Goals specified by the Committee with respect to such Award are to be measured. It is intended that the Performance Period will coincide with the fiscal year of the Company.

“Permanent and Total Disability” shall mean that an individual is unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected to last for a continuous period of not less than twelve (12) months. An individual shall not be considered to suffer from Permanent and Total Disability unless such individual furnishes proof of the existence thereof in such form and manner, and at such times, as the Committee may reasonably require. The scope of this definition shall automatically be reduced or expanded to the extent the comparable definition in the ENSCO International Incorporated 2005 Long-Term Incentive Plan is reduced or expanded from time to time.

“Plan” shall mean this ENSCO International Incorporated 2005 Cash Incentive Plan, as amended from time to time.

“Plan Schedule” shall mean a schedule that constitutes a part of this Plan and details certain particulars with respect to this Plan and Annual Performance Bonus Awards hereunder for one or more Performance Periods, including the relative Performance Goals, specific performance factors and targets related to these Performance Goals, award criteria, and the targeted amounts of each Annual Performance Bonus Award granted to a Participant. Each Plan Schedule that is applicable to Covered Employees and officers of the Company (as defined in Section 4(b)) shall be adopted by the Committee or shall be prepared by the appropriate officers of the Company based on resolutions, minutes or consents adopted by the Committee. Each Plan Schedule that is applicable to Employees who are not Covered Employees or officers of the Company shall be adopted in consultation with the Committee by the Chief Executive Officer of the Company or such other officers of the Company as may be designated by the Chief Executive Officer of the Company from time to time. There may be more than one Plan Schedule under this Plan. Each Plan Schedule is incorporated herein by reference and thereby made a part of this Plan, and references herein to this Plan shall include the Plan Schedule.

“Services” shall mean services rendered to the Company or any of its Subsidiaries as an Employee.

“Subsidiary” shall mean any corporation as to which more than fifty percent (50%) of the outstanding voting stock or shares shall now or hereafter be owned or controlled, directly by a person, any Subsidiary of such person, or any Subsidiary of such Subsidiary.

SECTION 3

ADMINISTRATION

a. General Administration. This Plan shall be administered by the Committee.

b.Authority of Committee. The Committee shall administer this Plan so as to comply at all times with the Exchange Act and, subject to the Code, shall otherwise have sole and absolute and final authority to interpret this Plan and to make all determinations specified in or permitted by this Plan or deemed necessary or desirable for its administration or for the conduct of the Committee’s business, including, without limitation, the authority to take the following actions:

(i) To interpret and administer this Plan and to apply its provisions;

(ii) To adopt, amend or rescind rules, procedures and forms relating to this Plan;

(iii) To authorize any person to execute, on behalf of the Company, any instrument required to carry out the purposes of this Plan;

(iv) To determine when Awards are to be granted under this Plan;

(v) To select the Employees and Participants to whom Awards may be awarded from time to time;

(vi) To determine the type or types of Award to be granted to each Participant hereunder;

(vii) To determine the potential cash bonus to be made subject to each Award;

(viii) To prescribe the terms, conditions and restrictions, not inconsistent with the provisions of this Plan, of any Award granted hereunder;

(ix) To determine whether, to what extent, and under what circumstances Awards may be settled in cash, reduced, varied, canceled or suspended;

(x) To determine whether, to what extent and under what circumstances payment of cash and other amounts payable with respect to an Award made under this Plan shall be deferred either automatically or at the election of the Participant;

(xi) To amend or modify any outstanding Awards, in its discretion, in accordance with Section 5(e);

(xii) To establish and interpret Performance Goals and the specific performance factors and targets in relation to the Performance Goals in connection with any Award of an Annual Performance Bonus; provided that in any case, the Performance Goals may be based on either a single period or cumulative results, aggregate or per-share data or results computed independently or with respect to a peer group;

(xiii) Evaluate the level of performance over a Performance Period and certify the level of performance attained with respect to Performance Goals and specific performance factors and targets related to Performance Goals;

(xiv) Waive or amend any terms, conditions, restriction or limitation on an Award, except that (A) this Subsection 3(b)(xiv) shall not apply to an Annual Performance Bonus Award held by a Covered Employee, and (B) the terms and conditions of Awards to an Employee who is subject to the reporting requirements of Section 16(a) of the Exchange Act cannot be modified, amended, or waived other than on account of death, disability, retirement, a change in control, or a termination of employment in connection with a business transfer;

(xv) Appoint such agents as it shall deem appropriate for proper administration of this Plan; and

(xvi) To take any other actions deemed necessary or advisable for the administration of this Plan.

The Committee may, in its sole and absolute discretion, and subject to the provisions of this Plan, from time to time delegate any or all of its authority to administer this Plan to any other persons or committee as it deems necessary or appropriate for the proper administration of this Plan, except that no such delegation shall be made in the case of Awards intended to be qualified under Section 162(m) of the Code or Awards held by Employees who are subject to the reporting requirements of Section 16(a) of the Exchange Act. All interpretations and determinations of the Committee made with respect to the granting of Awards shall be final, conclusive and binding on all interested parties. The Committee may make grants of Awards on an individual or group basis.

c.Employment of Advisors. The Committee may employ attorneys, consultants, accountants, and other advisors, and the Committee, the Company and the officers and directors of the Company may rely upon the advice, opinions or valuations of the advisors employed.

d.Limitation of Liability/Rights of Indemnification. No member of the Committee or any person acting as a delegate of the Committee with respect to this Plan shall be liable for any action that is taken or is omitted to be taken or for any losses resulting from any action, interpretation, construction or omission made in good faith with respect to this Plan or any Award granted under this Plan. In addition to such other rights of indemnification as they may have as directors, members of the Committee shall be indemnified by the Company against any reasonable expenses, including attorneys’ fees actually and necessarily incurred, which they or any of them may incur by reason of any action taken or failure to act under or in connection with this Plan or any Award granted thereunder, and against all amounts paid by them in settlement of any claim related thereto (provided such settlement is approved by independent legal counsel selected by the Company), or paid by them in satisfaction of a judgment in any such action, suit or proceeding that such director or Committee member is liable for negligence or misconduct in the performance of his or her duties; provided that within sixty (60) days after institution of any such action, suit or proceeding a director or Committee member shall in writing offer the Company the opportunity, at its own expense, to handle the defense of the same.

SECTION 4

ELIGIBILITY

a.General Rule. Initially, this Plan has a four-tiered design which will utilize different corporate goals, thresholds, criteria and weighting to determine the Annual Performance Bonuses earned by the Employees who may be eligible for an Award under this Plan; the eligible Employees are described in this Section 4. The Committee or the Chief Executive Officer may determine from time to time to revise or expand the tiers described in Sections 4(b)-(e).

b.Corporate Officers. This group consists of Employees who are officers of the Company from the Chief Executive Officer to the Controller who have an impact on the strategic direction of the Company.

c.Business Unit Management. This group consists of Employees who are key business unit leaders of the Company or its Subsidiaries ranging from general managers to directors of staff functions in the business units.

d.Corporate Key Employees. This group consists of Employees who are department directors, managers, and a few select key senior professionals such as critical engineering talent.

e.Business Unit Key Employees. This group includes Employees who are business unit managers, including rig managers, functional managers, and select key senior professionals.

f.New Employees. Eligible positions from which individuals may be selected for participation are described in Sections 4(b)-(e). A new or current Employee who moves into an eligible position and becomes an Employee described in Sections 4(b)-(e) during a Performance Period may participate for that Performance Period at the discretion of the Chief Executive Officer of the Company. Such individual's Award will be prorated for the portion of the Performance Period the individual was eligible.

SECTION 5

ANNUAL PERFORMANCE BONUSES

a.Annual Performance Bonuses. The Committee may grant Annual Performance Bonuses under this Plan in the form of cash to the eligible Employees determined under Section 4 in the amounts and pursuant to the terms and conditions that the Committee may determine and set forth in the Award Notice, subject to the provisions of this Section 5.

b.Performance Periods. Annual Performance Bonuses will be awarded in connection with a twelve-(12) month Performance Period, which will be the fiscal year of the Company.

c.Eligible Participants. Prior to the commencement of each Performance Period beginning before January 1, 2010, the Committee will determine the Employees who will be eligible to receive an Annual Performance Bonus under this Plan with respect to that Performance Period; provided that the Committee may determine the eligibility of any Employee, other than a Covered Employee, after the commencement of the Performance Period. For any Performance Period beginning after December 31, 2009, the Committee may elect to determine the Employees who will be eligible to receive an Annual Performance Bonus under this Plan with respect to any such Performance Period after the commencement of that Performance Period as long as the Committee’s determinations are made in writing by not later than ninety (90) days after the commencement of that Performance Period and the outcome is substantially uncertain at the time that the determinations are made. An Award Notice shall be provided to each Participant under this Plan as soon as administratively feasible after such Participant becomes eligible for a Performance Period. An Award Notice shall specify the applicable Performance Period, and the Performance Goals, specific performance factors and targets related to the Performance Goals, award criteria, and the targeted amount of his or her Annual Performance Bonus, as well as any other applicable terms of the Annual Performance Bonus for which he or she is eligible.

d.Performance Goals; Specific Performance Targets; Award Criteria.

(i)Prior to the commencement of each Performance Period beginning before January 1, 2010, the Committee shall fix and establish in writing (A) the Performance Goals that will apply to that Performance Period; (B) with respect to Performance Goals, the specific performance factors and targets related to each Participant and, if achieved, the targeted amount of his or her Annual Performance Bonus; and (C) subject to Subsection (e) below, the criteria for computing the amount that will be paid with respect to each level of attained performance. The Committee shall also set forth the minimum level of performance, based on objective factors and criteria, that must be attained during the Performance Period before any Performance Goal is deemed to be attained and any Annual Performance Bonus will be earned and become payable, and the percentage of the Annual Performance Bonus that will be earned and become payable upon attainment of various levels of performance that equal or exceed the minimum required level. For any Performance Period beginning after December 31, 2009, the Committee may elect to determine the

Performance Goals and make the other determinations described in the preceding sentences of this Subsection (d)(i) with respect to each Annual Performance Bonus awarded for that Performance Period after the commencement of that Performance Period as long as all such required determinations are made by the Committee by not later than ninety (90) days after the commencement of that Performance Period, and the outcome is substantially uncertain at the time that the required determinations are made. The Committee shall adopt the Plan Schedule for a particular Performance Period prior to the applicable deadline for that Performance Period specified in this Subsection (d)(i).

(ii)The Committee may, in its discretion, select Performance Goals and specific performance factors and targets that measure the performance of the Company or one or more business units, divisions or Subsidiaries of the Company. The Committee may select Performance Goals and specific performance targets that are absolute or relative to the performance of one or more peer companies or an index of peer companies. Annual Performance Bonuses awarded to Participants who are not Covered Employees will be based on the Performance Goals and payment formulas that the Committee, in its discretion, may establish for these purposes. These Performance Goals and formulas may be the same as or different than the Performance Goals and formulas that apply to Covered Employees.

e. Adjustments.

i.In order to assure the incentive features of this Plan and to avoid distortion in the operation of this Plan, the Committee may make adjustments in the Performance Goals, specific performance factors and targets related to those Performance Goals and award criteria established by it for any Performance Period under this Section 5, whether before or after the end of the Performance Period to the extent it deems appropriate in its sole discretion, which shall be conclusive and binding upon all parties concerned, to compensate for or reflect any extraordinary changes which may have occurred during the Performance Period which significantly affect factors that formed part of the basis upon which such Performance Goals, specific performance targets related to those Performance Goals and award criteria were determined. Such changes may include, without limitation, changes in accounting practices, tax, regulatory or other laws or regulations, or economic changes not in the ordinary course of business cycles. The Committee also reserves the right to adjust Annual Performance Bonus Awards to insulate them from the effects of unanticipated, extraordinary, major business developments, e.g., unusual events such as a special asset writedown, sale of a division, etc. The determination of financial performance achieved for any Performance Period may, but need not be, adjusted by the Committee to reflect such extraordinary, major business developments. Any such determination shall not be affected by subsequent adjustments or restatements. Effective January 1, 2009, the Committee also reserves the right to decrease by up to twenty-five percent (25%) the amount of the Annual Performance Bonus Award determined by the Committee pursuant to Section 5(f) to be payable for the Performance Period to any Participant who is the Chief Executive Officer or a senior executive of the Company to reflect the determination by the Committee pursuant to Section 6, as amended, of the level of that Participant’s achievement (or non-achievement) of the individual goals previously established by the Committee for that Participant for the Performance Period. The determination of the amount of the decrease, if any, in the amount of any such Participant’s Annual Performance Bonus for the Performance Period shall be determined by the Committee in connection with its determinations under Section 5(f) and Section 6 for the Performance Period.

ii.In the event of any change in outstanding shares of the Company by reason of any stock dividend or split, recapitalization, merger, consolidation, combination or exchange of shares or other similar corporate change, the Committee shall make such adjustments, if any, that it deems appropriate in the Performance Goals, specific performance factors and targets related to those Performance Goals and

award criteria established by it under this Section 5 for any Performance Period not then completed; any and all such adjustments to be conclusive and binding upon all parties concerned.

iii.Notwithstanding the foregoing provisions of this Subsection (e) and the subsequent provisions of Subsections (f) and (i), with respect to (A) any Annual Performance Bonus Award, the Committee shall not have any discretion granted by this Subsection (e) or Subsections (f) and (i) to the extent that reserving or exercising such discretion would be impermissible under Section 409A of the Code, and (B) any Annual Performance Bonus Award to a Covered Employee that is intended to be “performance-based compensation” for purposes of Section 162(m) of the Code, the Committee shall not have any discretion granted by this Subsection (e) or Subsections (f) and (i) to the extent that reserving or exercising such discretion would cause any such Annual Performance Bonus Award not to qualify for the exemption from the limitation on deductibility imposed by Section 162(m) of the Code that is set forth in Section 162(m)(4)(C) of the Code.

f.Payment, Certification. As soon as administratively feasible after the end of each Performance Period, the Committee shall determine whether the Performance Goals applicable to Annual Performance Bonus Awards for such Performance Period were satisfied and, if such Performance Goals were satisfied in whole or in part, the amount payable for each Participant granted an Annual Performance Bonus Award. No Annual Performance Bonus Award will be deemed to be earned and payable with respect to any Covered Employee or other Employee subject to the reporting requirements of Section 16(a) of the Exchange Act until the Committee certifies in writing the level of performance attained for the Performance Period in relation to the applicable Performance Goals. For purposes of this Subsection (f), approved minutes of the Committee meeting in which the certification is made shall be treated as a written certification. In applying Performance Goals, the Committee may, in its discretion, exclude unusual or infrequently occurring items (including any event listed in Section 9 of the ENSCO International Incorporated 2005 Long-Term Incentive Plan and the cumulative effect of changes in the law, regulations or accounting rules), and may determine no later than ninety (90) days after the commencement of any applicable Performance Period to exclude other items, each determined in accordance with GAAP (to the extent applicable) and as identified in the financial statements, notes to the financial statements or discussion and analysis of management.

g.Form of Payment. Annual Performance Bonuses will be paid in cash in accordance with Section 7.

h.Limitation on Amount of Annual Performance Bonuses. The maximum amount that may be paid pursuant to an Annual Performance Bonus Award for any Performance Period to any one individual under this Plan is $2,500,000.

i.Section 162(m) of the Code. To the extent that it is the intent of the Company and the Committee that any Annual Performance Bonus Award be “performance-based compensation” for purposes of Section 162(m) of the Code, this Section 5 shall be interpreted in a manner that satisfies the applicable requirements of Section 162(m)(4)(C) of the Code and related regulations and this Plan shall be operated so that the Company may take a full tax deduction for such Annual Performance Bonus. If any provision of this Plan or any Annual Performance Bonus would otherwise frustrate or conflict with this intent, that provision shall be interpreted and deemed amended so as to avoid this conflict and such terms or provisions shall be deemed inoperative to the extent necessary to avoid the conflict with the requirements of Section 162(m) of the Code without invalidating the remaining provisions hereof. With respect to any intended compliance with Section 162(m) of the Code, if this Plan does not contain any provision required to be included herein under Section 162(m) of the Code, such provisions shall be deemed to be incorporated herein with the same force and effect as if such provision had been set out at length herein.

j.Promotion or Transfer. In the event of promotion or transfer during the Performance Period, the Incentive Award will be determined on a pro rata basis at the different job levels and/or different units or unit sectors. Promotion or transfer after the Performance Period does not affect determination of the Incentive Award amount for that Performance Period.

k.Acceleration. Each Participant who has been granted an Annual Performance Bonus Award that is outstanding as of the date of a Change in Control will have his or her Annual Performance Bonus Award interpreted as if the specific targets related to the Performance Goals have been achieved to a level of performance, as of the date of Change in Control, that would cause all (100%) of the Participant’s targeted amount under the Annual Performance Bonus to become payable in an amount determined by multiplying that targeted amount by a fraction, the numerator of which is the number of days in the Performance Period that had elapsed as of the Change in Control date and the denominator of which is 365. The Committee or the Chief Executive Officer may, however, determine in its or his or her sole discretion not to apply the pro rata reduction described in the preceding sentence.

l.Disqualification of Award. This Plan is intended to align Employee and stockholder interests. Occasionally unusual circumstances may arise that are not anticipated by this Plan. Should a situation occur where a Participant is deemed to have (A) breached the Company’s Code of Business Conduct (Ethics) Policy, (B) materially breached any other policy of the Company, or (C) experienced a significant incident involving a fatal or serious injury to an Employee under the supervision of the Participant or significant damage to the property of the Company and its Subsidiaries or the environment which is caused by the actions or inactions of the Participant or one or more Employees under his or her supervision, the Committee, in its sole discretion, may disqualify the Participant from earning or receiving payment of any Award for a given Performance Period in whole or in part. Participation in future Performance Periods may be considered independent of this decision.

SECTION 6

DISCRETIONARY BONUSES

The Committee has designed this Plan with the intent to ensure that this Plan design regarding Annual Performance Bonus Awards will eliminate or minimize the need for the Award of any Discretionary Bonuses. The Committee recognizes, however, that unusual circumstances may occur that prevent paying appropriate rewards to a few key eligible Employees. In recognition of truly extraordinary performance, occasional Discretionary Bonuses Awards may be required and granted by the Committee. In summary, while Discretionary Bonus Awards are made entirely at the discretion of the Committee, they are primarily intended to provide a means of redressing rare inequities in Annual Performance Bonus Award determinations or to reward exemplary performance on a very limited basis. Discretionary Bonuses will be paid in cash in accordance with Section 7.

Notwithstanding the limitations of the preceding paragraph of this Section 6 to the contrary, effective January 1, 2009, the Committee may determine to make a Discretionary Bonus Award to the Chief Executive Officer and/or to any Participant selected by the Chief Executive Officer who is senior executive of the Company for the period coinciding with the Performance Period based upon the Committee’s determination regarding the level of that Participant’s achievement (or non-achievement) of the individual goals previously established by the Committee (and, with respect to the Chief Executive Officer, are ratified by the Board, and with respect to each such senior executive, are based on recommendations from the Chief Executive Officer) for that Participant for such period. The amount of the Discretionary Bonus that may be payable to any such Participant pursuant to this paragraph may not exceed twenty-five percent (25%) of the amount of the Annual Performance Bonus Award determined by the Committee pursuant to Section 5(f) to be payable

for that Performance Period to such Participant. As provided in Section 5(e)(i), as amended, the determination by the Committee pursuant to this paragraph with respect to any such Participant may result in a decrease in the amount of the Annual Performance Bonus determined by the Committee pursuant to Section 5(f) for the Performance Period. The Committee shall make its determinations under this paragraph in connection with its determinations under Section 5(f) for the Performance Period.

SECTION 7

PAYMENT; TAX WITHHOLDING

a.Eligibility for Non-Tax Deferred Payment. Except as provided in Sections 7(c) and (d) below, upon the Committee’s written certification in accordance with Section 5(f) that a payment for an Annual Performance Bonus Award with respect to a Performance Period is due under the Plan, each Participant who has been granted an Annual Performance Bonus Award with respect to such Performance Period and who has remained continuously employed by the Company or a Subsidiary until the last day of such Performance Period shall be entitled to the payment amount applicable to such Participant’s Annual Performance Bonus Award certified by the Committee for such Performance Period and his or her Discretionary Bonus Award, if any. Payments under this Plan shall be made in cash in one lump sum payment. Effective January 1, 2009, it is intended that payments under this Plan shall be made as soon as administratively feasible after the end of the Performance Period following written certification by the Committee under Section 5(f) that payment of Incentive Awards are due and no later than the December 31^st of the year following the year in which that Performance Period ends in order to ensure that this Plan complies with the specified time of payment requirement of Section 409A(a)(2)(A)(iv) of the Code and Treas. Reg. §§1.409A-3(a)(4) and (b).

b.Tax Deferred Payment. If an Award recipient for any Performance Period is eligible to participate in any deferred compensation program sponsored and administered by the Company, he or she may elect, prior to the first day of that Performance Period, to defer all or any portion of that Award payment under the terms and conditions, and up to the limits, determined in the discretion of the Committee and as permitted by the terms of that deferred compensation plan. Notwithstanding the preceding sentence of this Subsection (b), in the case of an Award granted to a Participant described in the preceding sentence for any Performance Period beginning after December 31, 2009, an initial deferral election may be made by that Participant after the commencement of the Performance Period with respect to the portion of the Award which constitutes “performance-based compensation” under Section 409A of the Code; provided that (i) any such election must be made on or before the date that is six months before the end of the Performance Period, (ii) the Participant must perform services continuously from the later of the beginning of the Performance Period or the date all of the required performance criteria are established under Section 5(d) or, if applicable, under the second paragraph of Section 6, through the date an election is made under that deferred compensation program, and (iii) in no event may an election to defer performance-based compensation be made after such compensation has become readily ascertainable. For purposes of this Subsection (b), if the performance-based compensation is a specified or calculable amount, the compensation shall be considered to be readily ascertainable if and when the amount is first substantially certain to be paid. If the performance-based compensation is not a specified or calculable amount because, for example, the amount may vary based upon the level of performance, the compensation, or any portion of the compensation, shall be considered to be readily ascertainable when the amount is first both calculable and substantially certain to be paid.

Except as provided in the next paragraph of this Subsection (b), (i) an Annual Performance Bonus Award granted in accordance Sections 5(c) and 5(d)(i) shall be considered to constitute performance-based compensation under Section 409A of the Code, and (ii) a Discretionary Bonus Award granted for a Performance Period in accordance with the second paragraph of Section 6 shall be considered to constitute

performance-based compensation under Section 409A of the Code to the extent the amount of such Discretionary Bonus, or the entitlement to such Discretionary Bonus, is contingent on the satisfaction of organizational or individual performance criteria relating to the Performance Period which were established in writing while the outcome was substantially uncertain and by not later than ninety (90) days after the commencement of the Performance Period to which the criteria relates.

For purposes of this Subsection (b), performance-based compensation under Section 409A of the Code shall not include any amount or portion of any amount of an Award that will be paid either regardless of performance, or based upon a level of performance, that is substantially certain to be met at the time the criteria is established. The amount payable under an Award may be performance-based compensation under Section 409A of the Code where the amount will be paid regardless of satisfaction of the performance criteria due to the Participant’s death, Permanent and Total Disability, or a Change in Control, provided that a payment made under such circumstances without regard to the satisfaction of the performance criteria shall not constitute performance-based compensation under Section 409A of the Code.

Any portion of any Award not deferred under this section of this Plan will be paid as described under Subsection (a).

c.Retirement, Permanent and Total Disability or Death. If a Participant was granted an Incentive Award for a Performance Period beginning after December 31, 2008 and his or her employment with the Company and its Subsidiaries terminates during the Performance Period by reason of death, Permanent and Total Disability, or retirement on or after Normal Retirement Age, the Incentive Award shall be determined on a pro rata basis for that Performance Period by comparing the actual level of performance to the specific targets related to the Performance Goals and individual performance goals established by the Committee for that Participant for that Performance Period and then multiplying that amount by a fraction, the numerator of which is the number of days in the Performance Period that had elapsed as of the date of such employment termination and the denominator of which is 365. The amount determined pursuant to the preceding sentence of this Subsection (c) shall become payable as provided in Subsection (a). In the event of death, payment shall be made to the beneficiary or beneficiaries as designated on the Participant’s beneficiary designation form under the Company’s group term life insurance program. In the absence of a beneficiary designation form, payment of the Incentive Award shall be made to the estate of the deceased Participant. Any amount that has been deferred as provided under Subsection (b) shall be processed in accordance with the applicable deferred compensation plan.

d.Employee Termination or Resignation. Except as provided in Subsection (c) or in Section 7(e) or (f) below, if a Participant resigns before his or her Normal Retirement Age or is terminated by the Company or any Subsidiary of the Company, and such employment resignation or termination occurs before the payment date of the Participant’s Incentive Award, if any, then such Participant shall forfeit that unpaid Incentive Award and shall not be entitled to receive any payment under this Plan with respect to his or her Incentive Award for such Performance Period.

e.Challenge to Control-Committee Discretion. The Committee may, in its discretion, direct that all employment continuation requirements be waived if it finds, in its sole discretion, that a major challenge to the control of the Company exists; subject, however, to the requirement that the exercise of such discretion shall result in all Annual Performance Bonus Awards for any Performance Period beginning after December 31, 2008 being determined on a pro-rated basis consistent with the procedure described in Subsection (c). Any amount that has been deferred as provided under Subsection (b) shall be processed in accordance with the applicable deferred compensation plan.

f.Change in Control-Automatic Acceleration of Incentive Awards. If in fact a Change in Control occurs, all Incentive Awards will be determined and paid to Participants within sixty (60) days of such event.

g.Tax Withholding. Incentive Awards under this Plan will be subject to tax withholding as required by law. Any deferred payments pursuant to Subsection (b) shall be subject to tax withholding as provided in the applicable deferred compensation plan.

h.Impact on Employee Benefits. Incentive Awards paid under this Plan shall not be included in the determination of an Employee’s eligible compensation when determining benefits under other benefit programs.

SECTION 8

NO EMPLOYMENT RIGHTS

No provisions of this Plan under any Award Notice shall be construed to give any Participant any right to remain an Employee of, or provide Services to, the Company or any of its Subsidiaries or to affect the right of the Company to terminate any Employee’s service at any time, with or without cause.

SECTION 9

FUNDING AND STATUS OF PLAN

This Plan is a payroll practice of the Company and not an employee benefit plan within the meaning of Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”). This Plan is not funded in the sense of a "funded plan" under ERISA, or Internal Revenue Service or other government regulations, which prescribe certain Participant rights and fiduciary obligations. Funding for this Plan will be equivalent to the sum of individual Incentive Awards. Funding is for accounting purposes only and does not confer any rights to Participants to any portion of such funds or any other Company assets except under this Plan rules and Award guidelines. To the extent that a Participant acquires a right to receive payment from the Company under this Plan, such right shall be no greater than the rights of any unsecured creditor of the Company.

SECTION 10

TERM OF PLAN; EFFECT OF AMENDMENT OR TERMINATION

a.Effective Date; Term of Plan. This Plan shall continue in effect until terminated under this Section

b.Amendment and Termination. The Committee in its sole discretion may terminate this Plan at any time and may amend this Plan at any time in such respects as the Committee may deem advisable; provided, no amendment, suspension or termination of this Plan shall materially adversely affect the rights of a Participant with respect to compensation previously earned and not yet paid. In the event that this Plan shall be suspended or terminated during the course of a Performance Period, an Incentive Award calculated in accordance with the terms of this Plan prior to such event will be paid to Participants on a pro rata basis.

SECTION 11

ALIENATION AND SUBORDINATION OF BENEFITS

No benefit or payment under this Plan may be subject to anticipation, alienation, sale, transfer, assignment, pledge, encumbrance, lien or charge, by operation of law or otherwise, including levy, garnishment, pledge, or bankruptcy, except by will or the laws of descent and distribution, and any attempt to treat otherwise shall be void. No payment or benefit shall be in any manner liable for or subject to the recipient’s debts, contracts, liabilities, or torts except where legislation provides for regulatory action or court order (garnishment, etc.) to supersede this restriction.

GOVERNING LAW

THIS PLAN AND ANY AND ALL AWARD NOTICES EXECUTED IN CONNECTION WITH THIS PLAN SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS, WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES.

EX-12.1

Exhibit 12.1

ENSCO PLC AND SUBSIDIARIES

Statement of Calculation of Ratios of Earnings to Fixed Charges

(In millions, except ratios)

(Unaudited)

	Year Ended December 31,
	2014			2013			2012			2011			2010
Earnings
(Loss) income from continuing operations before income tax	$	(2,548.8	)	$	1,633.2		$	1,304.7		$	673.5		$	494.7
Fixed charges deducted from income from continuing operations	260.4			245.3			247.3			187.6			26.6
Amortization of capitalized interest	17.0			13.3			12.3			6.7			4.5
Less:
Income from continuing operations before income tax attributable to noncontrolling interests	(15.5		)	(9.7		)	(7.4		)	(5.8		)	(7.7		)
Interest capitalized	(78.2		)	(67.7		)	(105.8		)	(80.2		)	(21.3		)
	(2,365.1		)	1,814.4			1,451.1			781.8			496.8
Fixed Charges
Interest on indebtedness, including amortization of deferred loan costs	161.4			158.8			123.6			95.9			—
Estimated interest within rental expense	20.8			18.8			17.9			11.5			5.3
Fixed charges deducted from income from continuing operations	182.2			177.6			141.5			107.4			5.3
Interest capitalized	78.2			67.7			105.8			80.2			21.3
Total	$	260.4		$	245.3		$	247.3		$	187.6		$	26.6
Ratio of Earnings to Fixed Charges	(a)			7.4			5.9			4.2			18.7

(a) For the year ended December 31, 2014, our earnings were inadequate to cover our fixed charges by $2,625.5 million. Net loss from continuing operations before income taxes of $2,548.8 million for the year ended December 31, 2014 included a non-cash loss on impairment of $4,218.7 million recorded during the period.

EX-21.1

SUBSIDIARIES OF THE REGISTRANT
Ensco plc Subsidiaries as of December 31, 2014
Company Name	Jurisdiction
Andre Maritime Ltd.	Bahamas
C.A. Foravep	Venezuela
Caland Boren B.V.	Netherlands
Criwey Corporation S.A.	Uruguay
Drilling Labor Services PTE Ltd.	Singapore
Dupont Maritime LLC	Liberia
Durand Maritime S.A.S.	France
Ensco (Thailand) Limited	Thailand
ENSCO Arabia Co. Ltd.	Saudi Arabia
ENSCO Asia Company LLC	Texas
ENSCO Asia Pacific Pte. Limited	Singapore
ENSCO Australia Pty. Limited	Australia
ENSCO (Barbados) Limited	Cayman Islands B.W.I.
ENSCO Brazil Servicos de Petroleo Ltda.	Brazil
ENSCO Capital Limited	Cayman Islands B.W.I.
Ensco Corporate Resources LLC	Delaware
ENSCO de Venezuela, S.R.L.	Venezuela
Ensco Deepwater Drilling Limited	England and Wales
Ensco Deepwater International Coöperatief U.A.	Netherlands
Ensco Deepwater LLC	Delaware
ENSCO Development Limited	Cayman Islands B.W.I.
Ensco do Brasil Petróleo E Gás Ltda.	Brazil
ENSCO Drilling Company (Nigeria) Ltd.	Nigeria
ENSCO Drilling Company LLC	Delaware
ENSCO Drilling Mexico LLC	Delaware
Ensco Endeavors Limited	Cayman Islands B.W.I.
ENSCO Finance Limited	England and Wales
Ensco France S.A.S.	France
ENSCO Gerudi (M) Sdn. Bhd.	Malaysia
ENSCO Global GmbH	Switzerland
ENSCO Global Investments LP	England
Ensco Global IV Ltd.	British Virgin Islands
ENSCO Global Limited	Cayman Islands B.W.I.
Ensco Global Offshore Drilling Ltd.	British Virgin Islands
ENSCO Global Resources Limited	England and Wales
Ensco Holdco Limited	England and Wales
ENSCO Holding Company	Delaware
ENSCO Holland B.V.	Netherlands
Ensco Incorporated	Texas
Ensco Intercontinental GmbH	Switzerland
ENSCO International Incorporated	Delaware
Ensco International Management GP LLC	Delaware
Ensco International Management LP LLC	Delaware
Ensco Investments, LLC	Nevada
ENSCO Labuan Limited	Malaysia (Labuan)
Ensco Management Corp	British Virgin Islands
ENSCO Maritime Limited	Bermuda
ENSCO Oceanics Company, LLC	Delaware
ENSCO Oceanics International Company	Cayman Islands B.W.I.
ENSCO Offshore Company	Delaware
ENSCO Offshore International Company	Cayman Islands B.W.I.

ENSCO Offshore International Holdings Limited	Cayman Islands B.W.I.
Ensco Offshore International LLC	Delaware
Ensco Offshore Petróleo e Gás Ltda.	Brazil
ENSCO Offshore U.K. Limited	England and Wales
ENSCO Overseas Limited	Cayman Islands B.W.I.
ENSCO Services Limited	England and Wales
ENSCO Services LLC	Delaware
Ensco South Pacific LLC	Delaware
Ensco Synergies LLC	Delaware
Ensco Transcontinental I LLC	Nevada
Ensco Transcontinental I LP	England and Wales
Ensco Transcontinental II LLC	Nevada
Ensco Transcontinental II LP	England and Wales
Ensco Transcontinental III LP	England and Wales
ENSCO U.K. Limited	England and Wales
ENSCO United Incorporated	Delaware
ENSCO Universal Limited	England and Wales
Ensco Wisconsin LLC	Delaware
ENSCO Worldwide GmbH	Switzerland
ENSCO Worldwide Investments Limited	England and Wales
EnscoMadeira Holdings, SGPS, Unipessoal Lda.	Madeira
Foradel SDN B.H.D.	Malaysia
Forasub B.V.	Netherlands
Forwest de Venezuela SA	Venezuela
International Technical Services LLC	Delaware
Internationale de Travaux et de Materiel (I.T.M.) S.A.S.	France
Martin Maritime Ltd.	Bahamas
Medfor (L) Ltd.	Malaysia (Labuan)
P.T. ENSCO Sarida Offshore	Indonesia
Petroleum International PTE Ltd.	Singapore
Petroleum Supply Company	Delaware
Pride Arabia Co. Ltd.	Saudi Arabia
Pride Deepwater (BVI) 1, Ltd.	British Virgin Islands
Pride Deepwater (BVI) 2, Ltd.	British Virgin Islands
Pride Deepwater USA, Inc.	Delaware
Pride Foramer S.A.S.	France
Pride Forasol Drilling Nigeria Ltd.	Nigeria
Pride Forasol S.A.S.	France
Pride Global III Ltd.	British Virgin Islands
Pride Global Offshore Nigeria Limited	Nigeria
Pride International Egypt LLC	Egypt
Pride International Ltd.	British Virgin Islands
Pride International Management Company LP	Texas
Pride International Services, Inc.	Delaware
Pride International, Inc.	Delaware
Pride North America LLC	Delaware
Societe Maritime de Services "SOMASER" S.A.S.	France
Sonamer Angola Ltd.	Bahamas
Sonamer Drilling International Limited	Bahamas
Sonamer Limited	Bahamas
Sonamer Perfuracoes Ltd.	Bahamas

EX-23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors and Shareholders

Ensco plc:

We consent to the incorporation by reference in the registration statement 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. 333-201532) of Ensco plc of our report dated March 2, 2015, with respect to the consolidated balance sheets of Ensco plc as of December 31, 2014 and 2013, and the related consolidated statements of operations, comprehensive (loss) income, and cash flows for each of the years in the three-year period ended December 31, 2014, and the effectiveness of internal controls over financial reporting as of December 31, 2014, which report appears in the December 31, 2014 annual report on Form 10-K of Ensco plc.

/s/ KPMG LLP

Houston, Texas

March 2, 2015

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Carl G. Trowell, certify that:

1. I have reviewed this report on Form 10-K 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) 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;

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:   March 2, 2015

/s/ Carl G. Trowell

Carl G. Trowell

Chief Executive Officer and President

EX-31.2

Exhibit 31.2

CERTIFICATION

I, James W. Swent III, certify that:

1. I have reviewed this report on Form 10-K 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:   March 2, 2015

/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 Annual Report of Ensco plc (the "Company") on Form 10-K for the period ending December 31, 2014 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Carl G. Trowell, Chief Executive Officer and President of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)   The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; 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/ Carl G. Trowell

Carl G. Trowell

Chief Executive Officer and President

March 2, 2015

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 Annual Report of Ensco plc (the "Company") on Form 10-K for the period ending December 31, 2014 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, that:

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

March 2, 2015

XML

Description Of The Business And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 continent country segments service rigs	Dec. 31, 2013	Dec. 31, 2012
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Number of rigs under construction	7
Number of different countries having drilling contracts spanning	20
Number of different continents having drilling contracts	6
Net foreign currency exchange gains (losses)	$ (2,600,000)	$ 6,400,000	$ (3,500,000)
Short-term Investments	757,300,000	50,000,000
Number of operating segments	3
Number of reportable segments	2
Number of services	1
Antidilutive share options excluded from computation of diluted earnings per share	0.4	0.3	0.4
Impairment of Long Lived Assets	2,500,000,000
Deferred Mobilization Costs [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Other assets	95,700,000	66,600,000
Deferred Regulatory Certification And Compliance Costs [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Other assets	20,000,000	18,300,000
Offshore Drilling Rigs [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Number of contract drilling rigs	70
Ultra Deepwater Drillships [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Number of contract drilling rigs	10
Semisubmersible Rigs [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Number of contract drilling rigs	13
Moored Semisubmersible Rigs [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Number of contract drilling rigs	5
Jackup Rigs [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Number of contract drilling rigs	42
Drilling Rigs And Equipment [Member] | Minimum [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives assets, minimum years	4 years
Drilling Rigs And Equipment [Member] | Maximum [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives assets, minimum years	35 years
Buildings And Improvements [Member] | Minimum [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives assets, minimum years	2 years
Buildings And Improvements [Member] | Maximum [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives assets, minimum years	30 years
Other Equipment, Computer And Communications Hardware And Software [Member] | Minimum [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives assets, minimum years	2 years
Other Equipment, Computer And Communications Hardware And Software [Member] | Maximum [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives assets, minimum years	6 years
Capital Reimbursements [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	428,900,000	273,600,000
Mobilization Revenue [Member]
Description Of The Business And Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	$ 149,400,000	$ 76,800,000

XML

Derivative Instruments (Gains And Losses On Derivatives Designated As Cash Flow Hedges) (Details) (Designated as Hedging Instrument [Member], Cash Flow Hedges [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivatives (Effective Portion)	$ (11.7)		$ (5.8)		$ 8.7
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0.9		(2.0)		0
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	(0.7)		(0.3)		(0.3)
Interest Rate Lock Contracts [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivatives (Effective Portion)	0	[1]	0	[1]	0	[1]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(0.4)	[1],[2]	(0.4)	[1],[2]	(0.5)	[1],[2]
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	[1],[3]	0	[1],[3]	0	[1],[3]
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	1.3	[2],[4]	(1.6)	[2],[4]	0.5	[2],[4]
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	(0.7)	[3],[4]	(0.3)	[3],[4]	(0.3)	[3],[4]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ (11.7)	[4]	$ (5.8)	[4]	$ 8.7	[4]

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

[2] Changes in the fair value of cash flow hedges are recorded in AOCI. Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction.

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

[4] During the year ended December 31, 2014, $400,000 of gains were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations. During the year ended December 31, 2013, $2.5 million of losses were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations.

XML

Property And Equipment (Schedule Of Property And Equipment) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment	$ 14,975.5	$ 17,498.5
Drilling rigs and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	13,253.2	15,839.0
Other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	135.0	101.0
Work in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,587.3	$ 1,558.5

XML

Discontinued Operations (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended				32 Months Ended		3 Months Ended				1 Months Ended		3 Months Ended
	Jun. 30, 2014 rigs		Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014		Mar. 31, 2014		Sep. 30, 2014		Mar. 31, 2013		Dec. 31, 2014 rigs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Rigs Committed To Be Sold	5
Pre-tax Gain/(Loss)							$ 19.3	[1],[2]
Net Cash Provided by (Used in) Discontinued Operations			105.5		202.1	290.8	311.1	[2]
Litigation Settlement, Amount			9.6
Legal Fees			3.6
Estimated Litigation Liability			6.4				6.4								6.4
Liability insurance self-insured retention per occurrence			10.0				10.0								10.0
Litigation Settlement, Amount to be Paid by Underwriters			3.2				3.2								3.2
Pride Pennsylvania Rig [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charge for asset write down						(2.5)
Jackups [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Rigs Committed To Be Sold			2
Jackups [Member] | ENSCO 69 And Wisconsin [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax Gain/(Loss)									23.6
Net Cash Provided by (Used in) Discontinued Operations									32.2	[2]
Jackups [Member] | ENSCO 93 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax Gain/(Loss)			1.2								(1.2)
Net Cash Provided by (Used in) Discontinued Operations			51.7	[2]							51.7	[2]
Jackups [Member] | ENSCO 85 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax Gain/(Loss)	10.3
Net Cash Provided by (Used in) Discontinued Operations	64.4	[2]
Jackups [Member] | Pride Pennsylvania Rig [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax Gain/(Loss)													(0.2)
Net Cash Provided by (Used in) Discontinued Operations													15.5	[2]
Floaters [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Rigs Committed To Be Sold			6												5
Floaters [Member] | ENSCO 5000 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax Gain/(Loss)															0.8
Net Cash Provided by (Used in) Discontinued Operations															1.3	[2]
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of, Tax Benefit			$ 83.5

[1] In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which are contracted to Pemex. As described below, the loss on sale and operating results of ENSCO 93 were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

[2] The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and were previously included within the operating segment noted in the above table.

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Derivative Instruments (Schedule Of Estimated Amount Of Net Gains Associated With Derivatives) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net unrealized gains to be reclassified to contract drilling expense	$ (9.4)
Net realized gains to be reclassified to depreciation expense	0.9
Net realized (losses) to be reclassified to interest expense	(0.4)
Net gains to be reclassified to earnings	$ (8.9)

XML

Segment Information (Schedule Of Revenues And Long-Lived Assets By Geographical Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 1,159.8	$ 1,201.4	$ 1,136.6	$ 1,066.7	$ 1,138.0	$ 1,119.9	$ 1,076.1	$ 989.4	$ 4,564.5	$ 4,323.4	$ 3,638.8
Long-lived Assets	12,534.8				14,311.0				12,534.8	14,311.0	13,145.6
Geographic Areas [Member]
Segment Reporting Information [Line Items]
Revenues									4,564.5	4,323.4	3,638.8
Long-lived Assets	12,534.8				14,311.0				12,534.8	14,311.0	13,145.6
Geographic Areas [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenues									1,712.4	1,687.2	1,265.5
Long-lived Assets	5,240.4				4,617.8				5,240.4	4,617.8	4,525.9
Geographic Areas [Member] | Brazil [Member]
Segment Reporting Information [Line Items]
Revenues									459.1	683.7	776.3
Long-lived Assets	1,459.0				2,447.5				1,459.0	2,447.5	2,911.3
Geographic Areas [Member] | Angola [Member]
Segment Reporting Information [Line Items]
Revenues									607.9	365.9	190.0
Long-lived Assets	1,913.5				2,543.7				1,913.5	2,543.7	2,147.2
Geographic Areas [Member] | Other countries [Member]
Segment Reporting Information [Line Items]
Revenues									1,785.1	1,586.6	1,407.0
Long-lived Assets	$ 3,921.9				$ 4,702.0				$ 3,921.9	$ 4,702.0	$ 3,561.2

XML

Fair Value Measurements (Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
4.70% Senior notes due 2021 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	4.70%
Debt instrument maturity period	2021
6.875% Senior notes due 2020 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	6.875%
Debt instrument maturity period	2020
3.25% Senior notes due 2016 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	3.25%
Debt instrument maturity period	2016
Four Point Five Percent Senior Notes Member [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	4.50%
Debt instrument maturity period	2024
Five Point Seven Five Percent Senior Notes [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	5.75%
Debt instrument maturity period	2044
8.50% Senior notes due 2019 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	8.50%
Debt instrument maturity period	2019
7.875% Senior notes due 2040 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	7.875%
Debt instrument maturity period	2040
7.20% Debentures due 2027 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	7.20%
Debt instrument maturity period	2027
4.33% MARAD bonds, including current maturities, due 2016 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	4.33%
Debt instrument maturity period	2016
6.36% MARAD bonds, including current maturities, due 2015 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	6.36%
Debt instrument maturity period	2015
4.65% MARAD bonds, including current maturities, due 2020 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, interest rate, stated percentage	4.65%
Debt instrument maturity period	2020
Carrying Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	5,920.4	$ 4,766.4
Carrying Value [Member] | 4.70% Senior notes due 2021 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	1,479.9	1,477.2
Carrying Value [Member] | 6.875% Senior notes due 2020 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	1,008.2	1,024.8
Carrying Value [Member] | 3.25% Senior notes due 2016 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	998.0	996.5
Carrying Value [Member] | Four Point Five Percent Senior Notes Member [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	624.2	0
Carrying Value [Member] | Five Point Seven Five Percent Senior Notes [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	622.3	0
Carrying Value [Member] | 8.50% Senior notes due 2019 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	583.8	600.5
Carrying Value [Member] | 7.875% Senior notes due 2040 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	381.2	382.6
Carrying Value [Member] | 7.20% Debentures due 2027 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	149.2	149.1
Carrying Value [Member] | 4.33% MARAD bonds, including current maturities, due 2016 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	46.6	78.9
Carrying Value [Member] | 6.36% MARAD bonds, including current maturities, due 2015 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	0	25.3
Carrying Value [Member] | 4.65% MARAD bonds, including current maturities, due 2020 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	27.0	31.5
Estimated Fair Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	5,973.4	5,096.3
Estimated Fair Value [Member] | 4.70% Senior notes due 2021 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	1,505.3	1,596.9
Estimated Fair Value [Member] | 6.875% Senior notes due 2020 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	1,008.5	1,086.7
Estimated Fair Value [Member] | 3.25% Senior notes due 2016 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	1,018.3	1,045.8
Estimated Fair Value [Member] | Four Point Five Percent Senior Notes Member [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	602.0	0
Estimated Fair Value [Member] | Five Point Seven Five Percent Senior Notes [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	615.8	0
Estimated Fair Value [Member] | 8.50% Senior notes due 2019 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	611.8	635.8
Estimated Fair Value [Member] | 7.875% Senior notes due 2040 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	363.8	410.5
Estimated Fair Value [Member] | 7.20% Debentures due 2027 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	171.4	178.6
Estimated Fair Value [Member] | 4.33% MARAD bonds, including current maturities, due 2016 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	46.8	79.7
Estimated Fair Value [Member] | 6.36% MARAD bonds, including current maturities, due 2015 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	0	27.1
Estimated Fair Value [Member] | 4.65% MARAD bonds, including current maturities, due 2020 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument	29.7	$ 35.2

XML

Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

Summary Of Rig Sales and Income From Discontinued Operations

The following table summarizes (loss) income from discontinued operations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Revenues	$	325.0		$	596.4		$	668.6
Operating expenses	372.0			577.6			544.3
Operating (loss) income	(47.0		)	18.8			124.3
Other income	—			.3			1.3
Income tax expense	(30.7		)	(20.2		)	(8.5		)
Loss on impairment, net	(1,158.8		)	—			—
Gain (loss) on disposal of discontinued operations, net	37.3			(1.1		)	(16.5		)
(Loss) income from discontinued operations	$	(1,199.2	)	$	(2.2	)	$	100.6

We sold the following rigs during the three-year period ended December 31, 2014 (in millions):

Rig(3)	Date of Rig Sale	Segment(1)	Net Proceeds		Net Book Value(2)		Pre-tax Gain/(Loss)
ENSCO 5000	December 2014	Floaters	$	1.3	$	.5	$	.8
ENSCO 93	September 2014	Jackups	51.7		52.9		(1.2		)
ENSCO 85	April 2014	Jackups	64.4		54.1		10.3
ENSCO 69 & Pride Wisconsin	January 2014	Jackups	32.2		8.6		23.6
Pride Pennsylvania	March 2013	Jackups	15.5		15.7		(.2		)
ENSCO 5003	December 2012	Floaters	68.2		89.4		(21.2		)
Pride Hawaii	October 2012	Jackups	18.8		16.8		2.0
ENSCO I	September 2012	Other	4.5		12.3		(7.8		)
ENSCO 61	June 2012	Jackups	31.7		19.6		12.1
ENSCO 59	May 2012	Jackups	22.8		21.9		.9
			$	311.1	$	291.8	$	19.3

⁽¹⁾ The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and were previously included within the operating segment noted in the above table.

⁽²⁾ Includes the rig's net book value as well as inventory and other assets on the date of the sale.

⁽³⁾ In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which are contracted to Pemex. As described below, the loss on sale and operating results of ENSCO 93 were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

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Supplemental Financial Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Capitalized interest	$ 78.2	$ 67.7	$ 105.8
Capital expenditure accruals	137.2	111.8	110.7
Customer Concentration Risk [Member] | Petrobras [Member] | Sales Revenue, Services, Net [Member]
Revenues		604.8	771.9
Concentration Risk, Percentage		14.00%	21.00%
Customer Concentration Risk [Member] | BP [Member] | Sales Revenue, Services, Net [Member]
Revenues	723.9	444.9
Concentration Risk, Percentage	16.00%	10.00%
Customer Concentration Risk [Member] | BP [Member] | Sales Revenue, Services, Net [Member] | Floaters [Member]
Concentration Risk, Percentage	80.00%	84.00%
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | U.S. Gulf of Mexico [Member]
Revenues	1,700.0	1,700.0	1,300.0
Concentration Risk, Percentage	38.00%	39.00%	35.00%
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Brazil [Member]
Revenues	459.1	683.7	776.3
Concentration Risk, Percentage	10.00%	16.00%	21.00%
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Angola [Member]
Revenues	$ 607.9
Concentration Risk, Percentage	13.00%
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Floaters [Member] | U.S. Gulf of Mexico [Member]
Concentration Risk, Percentage	79.00%	77.00%	75.00%

XML

Commitments And Contingencies (Capital Commitments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Cumulative Paid	$ 736.9	[1]
2014	1,353.5
2015	373.8
2016	0
Total	2,464.2	[2]
ENSCO DS-8 [Member]
Property, Plant and Equipment [Line Items]
Cumulative Paid	161.4	[1]
2014	384.4
2015	0
2016	0
Total	545.8	[2]
ENSCO DS-9 [Member]
Property, Plant and Equipment [Line Items]
Cumulative Paid	157.4	[1]
2014	375.0
2015	0
2016	0
Total	532.4	[2]
ENSCO DS-10 [Member]
Property, Plant and Equipment [Line Items]
Cumulative Paid	206.0	[1]
2014	310.3
2015	0
2016	0
Total	516.3	[2]
ENSCO 110 [Member]
Property, Plant and Equipment [Line Items]
Cumulative Paid	41.0	[1]
2014	166.2
2015	0
2016	0
Total	207.2	[2]
ENSCO 123 [Member]
Property, Plant and Equipment [Line Items]
Cumulative Paid	53.5	[1]
2014	0
2015	217.0
2016	0
Total	270.5
ENSCO 140 [Member]
Property, Plant and Equipment [Line Items]
Cumulative Paid	78.4	[1]
2014	78.9
2015	39.2
2016	0
Total	196.5
ENSCO 141 [Member]
Property, Plant and Equipment [Line Items]
Cumulative Paid	39.2	[1]
2014	38.7
2015	117.6
2016	0
Total	$ 195.5

[1] Cumulative paid represents the aggregate amount of contractual payments made from commencement of the construction agreement through December 31, 2014.

[2] Total commitments are based on fixed-price shipyard construction contracts, exclusive of costs associated with commissioning, systems integration testing, project management and capitalized interest.

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Guarantee Of Registered Securities (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Guarantor Obligations [Line Items]
Senior notes aggregate outstanding principal balance	1,700,000,000
8.50% Senior Notes Due 2019 [Member]
Guarantor Obligations [Line Items]
Senior note, maturity year	2019
Debt instrument interest rate stated percentage	8.50%
6.875% Senior notes due 2020 [Member]
Guarantor Obligations [Line Items]
Senior note, maturity year	2020
Debt instrument interest rate stated percentage	6.875%
7.875% Senior Notes Due 2040 [Member]
Guarantor Obligations [Line Items]
Senior note, maturity year	2040
Debt instrument interest rate stated percentage	7.875%
7.20% Debentures due 2027 [Member]
Guarantor Obligations [Line Items]
Senior note, maturity year	2027
Debt instrument interest rate stated percentage	7.20%
Notes Issued	150,000,000.0

XML

Shareholders' Equity (Schedule Of Activity In Our Various Shareholders' Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE				$ 12,798.9					$ 12,798.9
Net income	(3,448.5)	432.9	(1,169.6)	296.7	364.0	381.4	362.6	319.9	(3,888.5)	1,427.9	1,176.7
Equity financing costs									0	0	(66.7)
Net other comprehensive income (loss)									(6.3)	(1.9)	11.5
BALANCE	8,222.9				12,798.9				8,222.9	12,798.9
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE, shares				239.6				237.7	239.6	237.7	235.9
BALANCE				24.1				23.9	24.1	23.9	23.7
Shares issued under share-based compensation plans, net, shares									1.1	1.9	1.8
Shares issued under share-based compensation plans, net									0.1	0.2	0.2
BALANCE, shares	240.7				239.6				240.7	239.6	237.7
BALANCE	24.2				24.1				24.2	24.1	23.9
Additional Paid-In Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE				5,467.2				5,398.7	5,467.2	5,398.7	5,253.0
Shares issued under share-based compensation plans, net									0.4	21.8	35.3
Equity financing costs											66.7
Tax benefit (deficiency) from share-based compensation									1.2	0.1	(1.0)
Share-based compensation cost									48.7	46.6	44.7
BALANCE	5,517.5				5,467.2				5,517.5	5,467.2	5,398.7
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE				7,327.3				6,434.7	7,327.3	6,434.7	5,613.1
Net income									(3,902.6)	1,418.2	1,169.7
Cash dividends paid									(704.3)	(525.6)	(348.1)
BALANCE	2,720.4				7,327.3				2,720.4	7,327.3	6,434.7
AOCI [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE				18.2				20.1	18.2	20.1	8.6
Net other comprehensive income (loss)									(6.3)	(1.9)	11.5
BALANCE	11.9				18.2				11.9	18.2	20.1
Treasury Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE				(45.2)				(31.0)	(45.2)	(31.0)	(19.1)
Shares issued under share-based compensation plans, net									(0.1)	(0.1)	(0.1)
Repurchase of shares									(13.7)	(14.1)	(11.8)
BALANCE	(59.0)				(45.2)				(59.0)	(45.2)	(31.0)
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE				7.3				5.7	7.3	5.7	5.2
Net income									14.1	9.7	7.0
Distributions to noncontrolling interests									(13.5)	(8.1)	(6.5)
BALANCE	$ 7.9				$ 7.3				$ 7.9	$ 7.3	$ 5.7

XML

Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 1,159.8	$ 1,201.4	$ 1,136.6	$ 1,066.7	$ 1,138.0	$ 1,119.9	$ 1,076.1	$ 989.4	$ 4,564.5	$ 4,323.4	$ 3,638.8
Operating expenses - Contract drilling (exclusive of depreciation)	514.0	500.2	542.5	520.2	500.4	499.2	496.1	451.4	2,076.9	1,947.1	1,642.8
Asset Impairment Charges	3,515.2	0	703.5	0					4,218.7	0	0
Depreciation	139.4	135.2	132.2	131.1	127.5	124.7	124.0	120.0	537.9	496.2	443.8
General and administrative	28.3	29.3	36.2	38.1	35.2	37.4	36.4	37.8	131.9	146.8	148.9
OPERATING INCOME	(3,037.1)	536.7	(277.8)	377.3	474.9	458.6	419.6	380.2	(2,400.9)	1,733.3	1,403.3
Property and equipment, net	12,534.8				14,311.0				12,534.8	14,311.0	13,145.6
Capital expenditures									1,568.8	1,763.5	1,713.2
Floaters [Member]
Segment Reporting Information [Line Items]
Revenues									2,697.6	2,659.6	2,149.1
Operating expenses - Contract drilling (exclusive of depreciation)									1,201.2	1,126.0	894.5
Asset Impairment Charges									3,982.3
Depreciation									358.1	342.2	283.3
General and administrative									0	0	0
OPERATING INCOME									(2,844.0)	1,191.4	971.3
Property and equipment, net	9,462.3				11,303.4				9,462.3	11,303.4	10,727.6
Capital expenditures									856.2	1,028.6	1,519.4
Jackups [Member]
Segment Reporting Information [Line Items]
Revenues									1,774.6	1,588.7	1,406.9
Operating expenses - Contract drilling (exclusive of depreciation)									807.4	762.6	687.2
Asset Impairment Charges									236.4
Depreciation									171.2	147.5	151.6
General and administrative									0	0	0
OPERATING INCOME									559.6	678.6	568.1
Property and equipment, net	2,995.3				2,961.6				2,995.3	2,961.6	2,389.8
Capital expenditures									667.7	708.3	191.1
Other [Member]
Segment Reporting Information [Line Items]
Revenues									92.3	75.1	82.8
Operating expenses - Contract drilling (exclusive of depreciation)									68.3	58.5	61.1
Asset Impairment Charges									0
Depreciation									0	0	0
General and administrative									0	0	0
OPERATING INCOME									24.0	16.6	21.7
Property and equipment, net	0				0				0	0	0
Capital expenditures									0	0	0
Operating Segments Total [Member]
Segment Reporting Information [Line Items]
Revenues									4,564.5	4,323.4	3,638.8
Operating expenses - Contract drilling (exclusive of depreciation)									2,076.9	1,947.1	1,642.8
Asset Impairment Charges									4,218.7
Depreciation									529.3	489.7	434.9
General and administrative									0	0	0
OPERATING INCOME									(2,260.4)	1,886.6	1,561.1
Property and equipment, net	12,457.6				14,265.0				12,457.6	14,265.0	13,117.4
Capital expenditures									1,523.9	1,736.9	1,710.5
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Revenues									0	0	0
Operating expenses - Contract drilling (exclusive of depreciation)									0	0	0
Asset Impairment Charges									0
Depreciation									8.6	6.5	8.9
General and administrative									131.9	146.8	148.9
OPERATING INCOME									(140.5)	(153.3)	(157.8)
Property and equipment, net	77.2				46.0				77.2	46.0	28.2
Capital expenditures									$ 44.9	$ 26.6	$ 2.7

XML

Supplemental Financial Information (Repair And Maintenance Expense Related To Continuing Operations) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Financial Information [Abstract]
Repair and maintenance expense	$ 357.2	$ 287.8	$ 276.3

XML

Supplemental Financial Information (Other Current Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Supplemental Financial Information [Abstract]
Inventory	$ 240.3	$ 256.4
Prepaid taxes	90.6	88.1
Deferred mobilization costs	61.9	47.4
Prepaid expenses	33.8	18.5
Derivative assets	0.6	11.6
Deferred tax assets	43.8	23.1
Assets held for sale	152.4	8.6
Other	6.0	10.2
Other current assets	$ 629.4	$ 463.9

XML

Supplemental Financial Information (Cash Flows Information) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Financial Information [Abstract]
(Increase) decrease in other assets	$ (76.4)	$ (94.1)	$ 67.8
Increase (decrease) in liabilities	208.2	(10.3)	312.3
(Increase) decrease in accounts receivable	(38.5)	(46.7)	59.1
Changes in operating assets and liabilities	$ (93.3)	$ 151.1	$ (439.2)

XML

Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)	Dec. 31, 2014 contract rigs
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	70
Number of drilling management contracts	6
Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	28
Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	42
North & South America (Excluding Brazil) [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	17
North & South America (Excluding Brazil) [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	9
North & South America (Excluding Brazil) [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	8
Middle East & Africa [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	15
Middle East & Africa [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	4
Middle East & Africa [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	11
Asia & Pacific Rim [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	12
Asia & Pacific Rim [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	4
Asia & Pacific Rim [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	8
Europe & Mediterranean [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	15
Europe & Mediterranean [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	4
Europe & Mediterranean [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	11
Brazil [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	4
Brazil [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	4
Brazil [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Asia & Pacific Rim (Under Construction) [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	5
Asia & Pacific Rim (Under Construction) [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	3
Asia & Pacific Rim (Under Construction) [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	2
Middle East Under Construction [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	2
Middle East Under Construction [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Middle East Under Construction [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	2

XML

Discontinued Operations (Summary Of Income From Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenues									$ 325.0	$ 596.4	$ 668.6
Operating expenses									372.0	577.6	544.3
Operating (loss) income before income taxes									(47.0)	18.8	124.3
Other income (expense)									0	0.3	1.3
Income tax benefit									(30.7)	(20.2)	(8.5)
Impairment of Long-Lived Assets to be Disposed of, Net of Tax Benefit									1,158.8	0	0
Gain on disposal of discontinued operations, net									37.3	(1.1)	(16.5)
DISCONTINUED OPERATIONS, NET	$ (388.0)	$ 9.2	$ (818.4)	$ (2.0)	$ (37.4)	$ (8.1)	$ 26.0	$ 17.3	$ (1,199.2)	$ (2.2)	$ 100.6

XML

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

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

The following fair value hierarchy table categorizes information regarding our net financial assets measured at fair value on a recurring basis as of December 31, 2014 and 2013 (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 December 31, 2014
Supplemental executive retirement plan assets	$	43.2	$	—		$	—	$	43.2
Total financial assets	$	43.2	$	—		$	—	$	43.2
Derivatives, net	—		(26.3		)	—		(26.3		)
Total financial liabilities	$	—	$	(26.3	)	$	—	$	(26.3	)
As of December 31, 2013
Supplemental executive retirement plan assets	$	37.7	$	—		$	—	$	37.7
Derivatives, net	—		1.8			—		1.8
Total financial assets	$	37.7	$	1.8		$	—	$	39.5

Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments

The carrying values and estimated fair values of our debt instruments as of December 31, 2014 and 2013 were as follows (in millions):

	December 31, 2014				December 31, 2013
	Carrying Value		Estimated   Fair Value		Carrying Value		Estimated   Fair Value
4.70% Senior notes due 2021	$	1,479.9	$	1,505.3	$	1,477.2	$	1,596.9
6.875% Senior notes due 2020	1,008.2		1,008.5		1,024.8		1,086.7
3.25% Senior notes due 2016	998.0		1,018.3		996.5		1,045.8
4.50% Senior notes due 2024	624.2		602.0		—		—
5.75% Senior notes due 2044	622.3		615.8		—		—
8.50% Senior notes due 2019	583.8		611.8		600.5		635.8
7.875% Senior notes due 2040	381.2		363.8		382.6		410.5
7.20% Debentures due 2027	149.2		171.4		149.1		178.6
4.33% MARAD bonds, including current maturities, due 2016	46.6		46.8		78.9		79.7
6.36% MARAD bonds, including current maturities, due 2015	—		—		25.3		27.1
4.65% MARAD bonds, including current maturities, due 2020	27.0		29.7		31.5		35.2
Total	$	5,920.4	$	5,973.4	$	4,766.4	$	5,096.3

XML

Debt (Schedule Of Long-Term Debt Instruments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Total	5,920.4	$ 4,766.4
Less current maturities	(34.8)	(47.5)
Total long-term debt	5,885.6	4,718.9
4.70% Senior notes due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.70%
Debt instrument maturity period	2021
6.875% Senior notes due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	6.875%
Debt instrument maturity period	2020
3.25% Senior notes due 2016 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	3.25%
Debt instrument maturity period	2016
Four Point Five Percent Senior Notes Member [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.50%
Debt instrument maturity period	2024
Five Point Seven Five Percent Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	5.75%
Debt instrument maturity period	2044
8.50% Senior notes due 2019 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	8.50%
Debt instrument maturity period	2019
7.875% Senior notes due 2040 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	7.875%
Debt instrument maturity period	2040
7.20% Debentures due 2027 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	7.20%
Debt instrument maturity period	2027
4.33% MARAD bonds due 2016 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.33%
Debt instrument maturity period	2016
6.36% MARAD bonds due 2015 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	6.36%
Debt instrument maturity period	2015
4.65% MARAD bonds due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.65%
Debt instrument maturity period	2020
Reported Value Measurement [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	5,920.4	4,766.4
Reported Value Measurement [Member] | 4.70% Senior notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	1,479.9	1,477.2
Reported Value Measurement [Member] | 6.875% Senior notes due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	1,008.2	1,024.8
Reported Value Measurement [Member] | 3.25% Senior notes due 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	998.0	996.5
Reported Value Measurement [Member] | Four Point Five Percent Senior Notes Member [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	624.2	0
Reported Value Measurement [Member] | Five Point Seven Five Percent Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	622.3	0
Reported Value Measurement [Member] | 8.50% Senior notes due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	583.8	600.5
Reported Value Measurement [Member] | 7.875% Senior notes due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	381.2	382.6
Reported Value Measurement [Member] | 7.20% Debentures due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	149.2	149.1
Reported Value Measurement [Member] | 4.33% MARAD bonds due 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	46.6	78.9
Reported Value Measurement [Member] | 6.36% MARAD bonds due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	0	25.3
Reported Value Measurement [Member] | 4.65% MARAD bonds due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Fair Value Disclosure	27.0	$ 31.5

XML

Description Of The Business And Summary Of Significant Accounting Policies (Schedule Of Income From Continuing Operations Attributable To Ensco) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Description Of The Business And Summary Of Significant Accounting Policies [Abstract]
Income from continuing operations	$ (3,060.5)	$ 423.7	$ (351.2)	$ 298.7	$ 401.4	$ 389.5	$ 336.6	$ 302.6	$ (2,689.3)	$ 1,430.1	$ 1,076.1
Income (Loss) from Continuing Operations, Portion Attributable to Noncontrolling Interest									(13.8)	(8.5)	(6.5)
Income from continuing operations attributable to Ensco									$ (2,703.1)	$ 1,421.6	$ 1,069.6

XML

Segment Information (Narrative) (Details)	12 Months Ended
	Dec. 31, 2014 service segments contract
Segment Reporting Information [Line Items]
Number of operating segments	3
Number of reportable segments	2
Number of services	1
Number of drilling management contracts	6
Moored Semisubmersible Rigs [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs	5
Jackup Rigs [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs	42
Floaters [Member]
Segment Reporting Information [Line Items]
Number of drillships	7
Floaters [Member] | Dynamically Positioned Semisubmersible [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs	13
Floaters [Member] | Moored Semisubmersible Rigs [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs	5
Floaters [Member] | Ultra-Deepwater [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs	3
Jackups [Member] | Jackup Rigs [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs	42
Jackups [Member] | Asset under Construction [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs	4
Asia Pacific, Europe and Mediterranean, Middle East and Africa and North and South America [Member] | Jackups [Member] | Jackup Rigs [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs	38

XML

Guarantee Of Registered Securities (Tables)

12 Months Ended

Dec. 31, 2014

Guarantees [Abstract]

Condensed Consolidating Statements Of Income

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2014 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	34.5		$	145.4		$	—		$	4,683.0		$	(298.4	)	$	4,564.5
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	31.8			145.4			—			2,198.1			(298.4		)	2,076.9
Loss on impairment	—			—			—			4,218.7			—			4,218.7
Depreciation	.2			7.6			—			530.1			—			537.9
General and administrative	52.0			.4			—			79.5			—			131.9
OPERATING (LOSS) INCOME	(49.5		)	(8.0		)	—			(2,343.4		)	—			(2,400.9		)
OTHER (EXPENSE) INCOME, NET	(67.0		)	(43.3		)	(54.7		)	17.1			—			(147.9		)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(116.5		)	(51.3		)	(54.7		)	(2,326.3		)	—			(2,548.8		)
INCOME TAX (BENEFIT) EXPENSE	—			(44.9		)	—			185.4			—			140.5
DISCONTINUED OPERATIONS, NET	—			—			—			(1,199.2		)	—			(1,199.2		)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	(3,786.1		)	(3,651.0		)	(3,744.3		)	—			11,181.4			—
NET LOSS	(3,902.6		)	(3,657.4		)	(3,799.0		)	(3,710.9		)	11,181.4			(3,888.5		)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(14.1		)	—			(14.1		)
NET LOSS ATTRIBUTABLE TO ENSCO	$	(3,902.6	)	$	(3,657.4	)	$	(3,799.0	)	$	(3,725.0	)	$	11,181.4		$	(3,902.6	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2013 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	35.0		$	149.4		$	—		$	4,446.4		$	(307.4	)	$	4,323.4
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	27.5			149.4			—			2,077.6			(307.4		)	1,947.1
Depreciation	.3			4.0			—			491.9			—			496.2
General and administrative	63.5			.5			—			82.8			—			146.8
OPERATING (LOSS) INCOME	(56.3		)	(4.5		)	—			1,794.1			—			1,733.3
OTHER (EXPENSE) INCOME, NET	(65.6		)	(9.4		)	(27.9		)	2.8			—			(100.1		)
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(121.9		)	(13.9		)	(27.9		)	1,796.9			—			1,633.2
INCOME TAX EXPENSE	—			92.5			—			110.6			—			203.1
DISCONTINUED OPERATIONS, NET	—			—			—			(2.2		)	—			(2.2		)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,540.1			366.2			111.6			—			(2,017.9		)	—
NET INCOME	1,418.2			259.8			83.7			1,684.1			(2,017.9		)	1,427.9
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(9.7		)	—			(9.7		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	1,418.2		$	259.8		$	83.7		$	1,674.4		$	(2,017.9	)	$	1,418.2

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	44.0		$	147.6		$	—		$	3,767.3		$	(320.1	)	$	3,638.8
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	51.2			147.6			—			1,764.1			(320.1		)	1,642.8
Depreciation	.4			3.5			—			439.9			—			443.8
General and administrative	63.8			.4			—			84.7			—			148.9
OPERATING (LOSS) INCOME	(71.4		)	(3.9		)	—			1,478.6			—			1,403.3
OTHER (EXPENSE) INCOME, NET	(41.8		)	(7.0		)	(50.0		)	.2			—			(98.6		)
(LOSS) INCOME BEFORE INCOME TAXES	(113.2		)	(10.9		)	(50.0		)	1,478.8			—			1,304.7
INCOME TAX EXPENSE	—			68.8			—			159.8			—			228.6
DISCONTINUED OPERATIONS, NET	—			—			—			100.6						100.6
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,282.9			335.9			239.2			—			(1,858.0		)	—
NET INCOME	1,169.7			256.2			189.2			1,419.6			(1,858.0		)	1,176.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(7.0		)	—			(7.0		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	1,169.7		$	256.2		$	189.2		$	1,412.6		$	(1,858.0	)	$	1,169.7

Schedule of Condensed Consolidated Statements of Comprehensive Income

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2014

(in millions)

	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
NET LOSS	$	(3,902.6	)	$	(3,657.4	)	$	(3,799.0	)	$	(3,710.9	)	$	11,181.4	$	(3,888.5	)
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	—			(11.7		)	—			—			—		(11.7		)
Reclassification of net gains on derivative instruments from other comprehensive income into net income	—			(.9		)	—			—			—		(.9		)
Other	—			—			—			6.3			—		6.3
NET OTHER COMPREHENSIVE (LOSS) INCOME	—			(12.6		)	—			6.3			—		(6.3		)
COMPREHENSIVE LOSS	(3,902.6		)	(3,670.0		)	(3,799.0		)	(3,704.6		)	11,181.4		(3,894.8		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(14.1		)	—		(14.1		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$	(3,902.6	)	$	(3,670.0	)	$	(3,799.0	)	$	(3,718.7	)	$	11,181.4	$	(3,908.9	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2013

(in millions)

	Ensco plc		ENSCO International Incorporated			Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	1,418.2	$	259.8		$	83.7	$	1,684.1		$	(2,017.9	)	$	1,427.9
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	—		(5.8		)	—		—			—			(5.8		)
Reclassification of net losses on derivative instruments from other comprehensive income into net income	—		2.0			—		—			—			2.0
Other	—		—			—		1.9			—			1.9
NET OTHER COMPREHENSIVE (LOSS) INCOME	—		(3.8		)	—		1.9			—			(1.9		)
COMPREHENSIVE INCOME	1,418.2		256.0			83.7		1,686.0			(2,017.9		)	1,426.0
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—			—		(9.7		)	—			(9.7		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	1,418.2	$	256.0		$	83.7	$	1,676.3		$	(2,017.9	)	$	1,416.3

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2012

(in millions)

	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	1,169.7	$	256.2	$	189.2	$	1,419.6		$	(1,858.0	)	$	1,176.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		6.3		—		2.4			—			8.7
Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	—		.2		—		(.2		)	—			—
Other	—		—		—		2.8			—			2.8
NET OTHER COMPREHENSIVE INCOME	—		6.5		—		5.0			—			11.5
COMPREHENSIVE INCOME	1,169.7		262.7		189.2		1,424.6			(1,858.0		)	1,188.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—		—		(7.0		)	—			(7.0		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	1,169.7	$	262.7	$	189.2	$	1,417.6		$	(1,858.0	)	$	1,181.2

Condensed Consolidating Balance Sheets

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2014 (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	$	287.4	$	—	$	90.8		$	286.6	$	—		$	664.8
Short-term investments	712.0		—		—			45.3		—			757.3
Accounts receivable, net	—		—		—			883.3		—			883.3
Accounts receivable from   affiliates	34.5		210.4		—			134.6		(379.5		)	—
Other	4.1		86.9		—			538.4		—			629.4
Total current assets	1,038.0		297.3		90.8			1,888.2		(379.5		)	2,934.8
PROPERTY AND EQUIPMENT, AT COST	2.1		71.5		—			14,901.9		—			14,975.5
Less accumulated depreciation	1.7		34.1		—			2,404.9		—			2,440.7
Property and equipment, net	.4		37.4		—			12,497.0		—			12,534.8
GOODWILL	—		—		—			276.1		—			276.1
DUE FROM AFFILIATES	2,873.2		4,748.2		1,835.0			6,308.8		(15,765.2		)	—
INVESTMENTS IN AFFILIATES	9,084.8		1,233.5		461.6			—		(10,779.9		)	—
OTHER ASSETS, NET	17.0		47.4		—			249.8		—			314.2
	$	13,013.4	$	6,363.8	$	2,387.4		$	21,219.9	$	(26,924.6	)	$	16,059.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued      liabilities	$	47.8	$	42.8	$	34.3		$	944.9	$	—		$	1,069.8
Accounts payable to affiliates	23.5		158.3		—			197.7		(379.5		)	—
Current maturities of long-term   debt	—		—		—			34.8		—			34.8
Total current liabilities	71.3		201.1		34.3			1,177.4		(379.5		)	1,104.6
DUE TO AFFILIATES	994.8		3,817.4		1,547.7			9,405.3		(15,765.2		)	—
LONG-TERM DEBT	3,724.4		149.2		1,973.2			38.8		—			5,885.6
DEFERRED INCOME TAXES	—		176.8		—			2.7		—			179.5
OTHER LIABILITIES	—		6.1		7.0			654.2		—			667.3
ENSCO SHAREHOLDERS' EQUITY (DEFICIT)	8,222.9		2,013.2		(1,174.8		)	9,933.6		(10,779.9		)	8,215.0
NONCONTROLLING INTERESTS	—		—		—			7.9		—			7.9
Total equity	8,222.9		2,013.2		(1,174.8		)	9,941.5		(10,779.9		)	8,222.9
	$	13,013.4	$	6,363.8	$	2,387.4		$	21,219.9	$	(26,924.6	)	$	16,059.9

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2013 (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	$	46.5	$	.5	$	4.9	$	113.7	$	—		$	165.6
Short-term investments	—		—		—		50.0		—			50.0
Accounts receivable, net	—		—		—		855.7		—			855.7
Accounts receivable from   affiliates	1,235.0		213.8		5.5		4,169.2		(5,623.5		)	—
Other	3.2		61.3		—		399.4		—			463.9
Total current assets	1,284.7		275.6		10.4		5,588.0		(5,623.5		)	1,535.2
PROPERTY AND EQUIPMENT, AT COST	2.1		34.3		—		17,462.1		—			17,498.5
Less accumulated depreciation	1.5		26.5		—		3,159.5		—			3,187.5
Property and equipment, net	.6		7.8		—		14,302.6		—			14,311.0
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	4,876.8		4,236.0		1,898.0		5,069.7		(16,080.5		)	—
INVESTMENTS IN AFFILIATES	13,830.1		4,868.6		4,092.2		—		(22,790.9		)	—
OTHER ASSETS, NET	8.8		60.1		—		283.8		—			352.7
	$	20,001.0	$	9,448.1	$	6,000.6	$	28,518.1	$	(44,494.9	)	$	19,472.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued      liabilities	$	31.5	$	9.1	$	34.2	$	925.0	$	—		$	999.8
Accounts payable to affiliates	3,666.1		549.7		—		1,407.7		(5,623.5		)	—
Current maturities of long-term   debt	—		—		—		47.5		—			47.5
Total current liabilities	3,697.6		558.8		34.2		2,380.2		(5,623.5		)	1,047.3
DUE TO AFFILIATES	1,030.8		2,760.4		1,331.1		10,958.2		(16,080.5		)	—
LONG-TERM DEBT	2,473.7		149.1		2,007.8		88.3		—			4,718.9
DEFERRED INCOME TAXES	—		358.3		—		3.8		—			362.1
OTHER LIABILITIES	—		2.3		8.7		534.7		—			545.7
ENSCO SHAREHOLDERS' EQUITY	12,798.9		5,619.2		2,618.8		14,545.6		(22,790.9		)	12,791.6
NONCONTROLLING INTERESTS	—		—		—		7.3		—			7.3
Total equity	12,798.9		5,619.2		2,618.8		14,552.9		(22,790.9		)	12,798.9
	$	20,001.0	$	9,448.1	$	6,000.6	$	28,518.1	$	(44,494.9	)	$	19,472.9

Condensed Consolidating Statements Of Cash Flows

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 2014 (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      operatingactivities of continuing operations	$	(63.8	)	$	(167.6	)	$	(90.9	)	$	2,380.2		$	—	$	2,057.9
INVESTING ACTIVITIES
Additions to property and equipment	—			(37.2		)	—			(1,531.6		)	—		(1,568.8		)
Purchases of short-term investments	(716.1		)	—			—			(74.5		)	—		(790.6		)
Net proceeds from disposition of assets	—			—			—			169.2			—		169.2
Maturities of short-term investments	—			—			—			83.3			—		83.3
Net cash used in investing activities of continuing operations	(716.1		)	(37.2		)	—			(1,353.6		)	—		(2,106.9		)
FINANCING ACTIVITIES
Proceeds from debt issuance	1,246.4			—			—			—			—		1,246.4
Cash dividends paid	(703.0		)	—			—			—			—		(703.0		)
Reduction of long-term   borrowings	—			—			—			(60.1		)	—		(60.1		)
Debt financing costs	(13.4		)	—			—			—			—		(13.4		)
Proceeds from exercise of share   options	2.6			—			—			—			—		2.6
Advances from (to) affiliates	501.9			204.3			176.8			(883.0		)	—		—
Other	(13.7		)	—			—			(16.1		)	—		(29.8		)
Net cash provided by (used in)          financing activities	1,020.8			204.3			176.8			(959.2		)	—		442.7
DISCONTINUED OPERATIONS
Operating activities	—			—			—			(3.8		)	—		(3.8		)
Investing activities	—			—			—			109.3			—		109.3
Net cash provided by discontinued operations	—			—			—			105.5			—		105.5
Effect of exchange rate changes on cash and cash equivalents	—			—			—			—			—		—
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	240.9			(0.5		)	85.9			172.9			—		499.2
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	46.5			0.5			4.9			113.7			—		165.6
CASH AND CASH EQUIVALENTS, END OF YEAR	$	287.4		$	—		$	90.8		$	286.6		$	—	$	664.8

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 2013 (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      operatingactivities of continuing operations	$	(114.8	)	$	(128.7	)	$	(62.9	)	$	2,117.6		$	—	$	1,811.2
INVESTING ACTIVITIES
Additions to property and   equipment	—			—			—			(1,763.5		)	—		(1,763.5		)
Purchases of short-term investments	—			—			—			(50.0		)	—		(50.0		)
Maturities of short-term investments	—			—			—			50.0			—		50.0
Net proceeds from disposition of assets	—			(4.1		)	—			10.1			—		6.0
Net cash used in investing activities of continuing operations	—			(4.1		)	—			(1,753.4		)	—		(1,757.5		)
FINANCING ACTIVITIES
Cash dividends paid	(525.6		)	—			—			—			—		(525.6		)
Reduction of long-term   borrowings	—			—			—			(47.5		)	—		(47.5		)
Proceeds from exercise of share   options	22.3			—			—			—			—		22.3
Debt financing costs	—			(4.6		)	—			—			—		(4.6		)
Advances from (to) affiliates	407.2			136.2			(17.2		)	(526.2		)	—		—
Other	(14.4		)	—			—			(7.3		)	—		(21.7		)
Net cash (used in) provided by          financing activities	(110.5		)	131.6			(17.2		)	(581.0		)	—		(577.1		)
DISCONTINUED OPERATIONS
Operating activities	—			—			—			169.3			—		169.3
Investing activities	—			—			—			32.8			—		32.8
Net cash provided by discontinued operations	—			—			—			202.1			—		202.1
Effect of exchange rate changes   on cash and cash equivalents	—			—			—			(.2		)	—		(.2		)
DECREASE IN CASH AND CASH EQUIVALENTS	(225.3		)	(1.2		)	(80.1		)	(14.9		)	—		(321.5		)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	271.8			1.7			85.0			128.6			—		487.1
CASH AND CASH EQUIVALENTS, END OF YEAR	$	46.5		$	.5		$	4.9		$	113.7		$	—	$	165.6

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 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      operatingactivities of continuing operations	$	(71.6	)	$	(38.2	)	$	(21.6	)	$	2,086.0		$	—	$	1,954.6
INVESTING ACTIVITIES
Additions to property and equipment	—			—			—			(1,713.2		)	—		(1,713.2		)
Purchases of short-term investments	—			—			—			(90.0		)	—		(90.0		)
Maturities of short-term investments	—			—			—			44.5			—		44.5
Net proceeds from disposition of assets	(.3		)	.4			—			3.1			—		3.2
Net cash (used in) provided       by investing activities of       continuing operations	(.3		)	.4			—			(1,755.6		)	—		(1,755.5		)
FINANCING ACTIVITIES
Cash dividends paid	(348.1		)	—			—			—			—		(348.1		)
Commercial paper borrowings,   net	(125.0		)	—			—			—			—		(125.0		)
Equity issuance cost	66.7			—			—			—			—		66.7
Reduction of long-term borrowings	—			—			—			(47.5		)	—		(47.5		)
Proceeds from exercise of share options	23.9			11.9			—			—			—		35.8
Advances from (to) affiliates	501.2			27.6			84.0			(612.8		)	—		—
Other	(11.6		)	—			—			(5.8		)	—		(17.4		)
Net cash provided by (used in) financing activities	107.1			39.5			84.0			(666.1		)	—		(435.5		)
DISCONTINUED OPERATIONS
Operating activities	—			—			—			232.5			—		232.5
Investing activities	—			—			—			58.3			—		58.3
Net cash provided by discontinued operations	—			—			—			290.8			—		290.8
Effect of exchange rate changes on cash and cash equivalents	—			—			—			2.0			—		2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	35.2			1.7			62.4			(42.9		)	—		56.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	236.6			—			22.6			171.5			—		430.7
CASH AND CASH EQUIVALENTS, END        OF YEAR	$	271.8		$	1.7		$	85.0		$	128.6		$	—	$	487.1

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Derivative Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	$ (26.3)
Maximum maturity period for all derivatives	18 months
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains on derivatives not designated as hedging instruments	(24.8)		3.6		1.5
Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0.9		(2.0)		0
Foreign Currency Derivative [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	(26.3)		1.8
Foreign Exchange Forward [Member] | Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1.3	[1],[2]	(1.6)	[1],[2]	0.5	[1],[2]
Foreign Exchange [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate cash flow hedges outstanding	207.5
British pounds	36.1
Brazilian reais	8.6
Euros	98.9
Indonesian rupiah	10.3
Swiss francs	31.1
Other currencies	22.5
Foreign Exchange [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate cash flow hedges outstanding	373.1
British pounds	194.3
Brazilian reais	81.2
Singapore dollars	28.5
Australian dollars	20.1
Euros	35.5
Other currencies	13.5
Contract Drilling [Member] | Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0.4		(2.5)
Depreciation Expense [Member] | Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 0.9		$ 0.9

[1] During the year ended December 31, 2014, $400,000 of gains were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations. During the year ended December 31, 2013, $2.5 million of losses were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations.

[2] Changes in the fair value of cash flow hedges are recorded in AOCI. Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction.

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Income Taxes (Summary Of Effective Income Tax Rate On Continuing Operations) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.K. statutory income tax rate	21.50%	23.30%	24.50%
Goodwill impairment	(25.30%)	0.00%	0.00%
Assets impairment	(10.90%)	0.00%	0.00%
Non-U.K. taxes	9.60%	(13.20%)	(17.50%)
Redomestication related income taxes	0.00%	0.00%	3.90%
Valuation allowance	(1.10%)	1.00%	5.00%
Other	0.70%	1.30%	1.60%
Effective income tax rate	(5.50%)	12.40%	17.50%

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Benefit Plans (Summary Of Non-Vested Share Award Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested as of December 31, 2011, Shares	2,496
Non-vested Granted, Shares	1,242
Non-vested Vested, Shares	(898)
Non-vested Forfeited, Shares	(199)
Non-vested as of December 31, 2012, Shares	2,641	2,496
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested as of December 31, 2011, Weighted-Average Grant-Date Fair Value	$ 52.95
Non-vested Granted, Weighted-Average Grant-Date Fair Value	$ 51.22	$ 59.79	$ 48.32
Non-vested Vested, Weighted-Average Grant-Date Fair Value	$ 51.07
Non-vested Forfeited, Weighted-Average Grant-Date Fair Value	$ 53.80
Non-vested as of December 31, 2012, Weighted-Average Grant-Date Fair Value	$ 52.86	$ 52.95

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Property And Equipment (Narrative) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014 rigs	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 517,300,000								$ 1,220,800,000
Cost of Services, Depreciation	139,400,000	135,200,000	132,200,000	131,100,000	127,500,000	124,700,000	124,000,000	120,000,000	537,900,000	496,200,000	443,800,000
Assets held for sale	152,400,000				8,600,000				152,400,000	8,600,000
Property and equipment	14,975,500,000				17,498,500,000				14,975,500,000	17,498,500,000
Impairment of Long Lived Assets									2,500,000,000
Impairment of Long-Lived Assets to be Disposed of									1,242,300,000
Price Per Barrel	55	95							55
Asset Impairment Charges	3,515,200,000	0	703,500,000	0					4,218,700,000	0	0
Number Of Rigs Committed To Be Sold			5
Drilling rigs and equipment [Member]
Property, Plant and Equipment [Line Items]
Increase in drilling rigs and equipment									(2,585,800,000)
Property and equipment	13,253,200,000				15,839,000,000				13,253,200,000	15,839,000,000
Work in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	1,587,300,000				1,558,500,000				1,587,300,000	1,558,500,000
Work in progress [Member] | Jackup Rigs [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	179,300,000				43,700,000				179,300,000	43,700,000
Work in progress [Member] | Ultra Deepwater Drillships [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	820,100,000				513,400,000				820,100,000	513,400,000
Work in progress [Member] | Premium Jackup Rigs [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	59,200,000				627,200,000				59,200,000	627,200,000
Rig Enhancement Projects [Member] | Moored Semisubmersible Rigs [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	233,100,000								233,100,000
ENSCO DS-2 [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets to be Disposed of			(288,000,000)
Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets to be Disposed of	407,900,000		546,400,000
Floaters [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use			991,500,000
Impaired Long-Lived Assets Held and Used, Asset Description									2
Cost of Services, Depreciation									358,100,000	342,200,000	283,300,000
Asset Impairment Charges									3,982,300,000
Number Of Additional Rigs Committed To Be Sold	1
Number Of Rigs Committed To Be Sold	5								6
Jackups [Member]
Property, Plant and Equipment [Line Items]
Impaired Long-Lived Assets Held and Used, Asset Description									10
Cost of Services, Depreciation									171,200,000	147,500,000	151,600,000
Asset Impairment Charges									$ 236,400,000
Number Of Additional Rigs Committed To Be Sold	2
Number Of Rigs Committed To Be Sold									2

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Property And Equipment

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Property And Equipment

PROPERTY AND EQUIPMENT

Property and equipment as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Drilling rigs and equipment	$	13,253.2	$	15,839.0
Other	135.0		101.0
Work in progress	1,587.3		1,558.5
	$	14,975.5	$	17,498.5

During 2014, drilling rigs and equipment declined$2.6 billion primarily due to a loss on impairment of $2.5 billion, depreciation expense of $537.9 million and $152.4 million classified as "held for sale" included in other current assets on our December 31, 2014 consolidated balance sheet. These declines were partially offset by ENSCO 120, ENSCO 121 and ENSCO 122, which were placed into service during 2014 and capital upgrades to the existing rig fleet.

Work in progress as of December 31, 2014 primarily consisted of $820.1 million related to the construction of ENSCO DS-8, ENSCO DS-9 and ENSCO DS-10 ultra-deepwater drillships, $233.1 million related to a capital enhancement project on ENSCO 5006, $179.3 million related to the construction of ENSCO 110, ENSCO 140 and ENSCO 141 premium jackup rigs, $59.2 million related to the construction of ENSCO 123 ultra-premium harsh environment jackup rig and costs associated with various modification and enhancement projects.

Work in progress as of December 31, 2013 primarily consisted of $627.2 million related to the construction of ENSCO 120 Series ultra-premium harsh environment jackup rigs, $513.4 million related to the construction of ENSCO DS-8, ENSCO DS-9 and ENSCO D-S 10 ultra-deepwater drillships, $43.7 million related to the construction of ENSCO 110 premium jackup rig and costs associated with various modification and enhancement projects.

Impairment of Long-Lived Assets

During 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2,463.1 million, of which $1,220.8 million was included in (loss) income from continuing operations and $1,242.3 million was included in (loss) income from discontinued operations, net in our consolidated statement of operations. These losses were recorded during the second and fourth quarters.

During the second quarter, demand for floaters deteriorated as a result of continued reductions in capital spending by operators in addition to delays in operators’ drilling programs. The reduction in demand, combined with the increasing supply from newbuild floater deliveries, led to a very competitive market. In general, contracting activity declined significantly, and day rates and utilization came under pressure, especially for older, less capable floaters.

In response to the adverse change in the floaters business climate, management evaluated our older, less capable floaters and committed to a plan to sell five rigs. ENSCO 5000, ENSCO 5001, ENSCO 5002, ENSCO 6000 and ENSCO 7500 were removed from our portfolio of rigs marketed for contract drilling services and actively marketed for sale. These rigs were written down to fair value, less costs to sell. We completed the sale of ENSCO 5000 in December 2014. The remaining four floaters were classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

We measured the fair value of the "held for sale" rigs by applying a market approach, which was based on unobservable third-party estimated prices that would be received in exchange for the assets in an orderly transaction between market participants. We recorded a pre-tax, non-cash loss on impairment totaling $546.4 million during the second quarter associated with our "held for sale" rigs. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014.

During the fourth quarter, Brent crude oil prices declined from approximately $95 per barrel to near $55 per barrel on December 31, 2014. These declines resulted in further reductions in capital spending by operators, including the cancellation or deferral of planned drilling programs. As a result, day rates and utilization came under further pressure, especially for older, less capable rigs. The significant supply and demand imbalance will continue to be adversely impacted by future newbuild deliveries, program delays and lower capital spending by operators.

In response to the adverse change in business climate, management evaluated our aged rigs and committed to a plan to sell one additional floater and two jackups. ENSCO DS-2, ENSCO 58 and ENSCO 90 were removed from our portfolio of rigs marketed for contract drilling services. These rigs were written down to fair value, less costs to sell, during the fourth quarter and classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

As of December 31, 2014, we measured the fair value of our seven "held for sale" rigs by applying a market approach, which was based on unobservable third-party estimated prices that would be received in exchange for the assets in an orderly transaction between market participants. In addition to the asset impairment recorded during the second quarter, we recorded an additional pre-tax, non-cash loss on impairment totaling $407.9 million during the fourth quarter. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014. See "Note 10 - Discontinued Operations" for additional information on our "held for sale" rigs.

On a quarterly basis, we evaluate the carrying value of our property and equipment to identify events or changes in circumstances ("triggering events") that indicate the carrying value may not be recoverable. During the second quarter, as a result of the adverse change in the floater business climate, management's decision to sell five floaters and the impairment charge incurred on the "held for sale" floaters, management concluded that a triggering event had occurred and performed an asset impairment analysis on our remaining older, less capable floaters.

Based on the analysis performed as of May 31, 2014, we recorded an additional pre-tax, non-cash loss on impairment with respect to four other floaters totaling $991.5 million, of which $288.0 million related to ENSCO DS-2 which was removed from our portfolio of rigs marketed for contract drilling services during the fourth quarter. The ENSCO DS-2 impairment charge was reclassified to (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014. The remaining $703.5 million impairment charge was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014. We measured the fair value of these rigs by applying an income approach, using projected discounted cash flows. These valuations were based on unobservable inputs that require significant judgments for which there is limited information, including assumptions regarding future day rates, utilization, operating costs and capital requirements.

During the fourth quarter, as a result of the decline in commodity prices and adverse changes in the offshore drilling market, management's decision to sell an additional floater and two jackups and the impairment charge incurred on the "held for sale" rigs, management concluded that a triggering event had occurred and performed an asset impairment analysis for all floaters and jackups.

Based on the analysis performed as of December 31, 2014, we recorded an additional pre-tax, non-cash loss on impairment with respect to two older, less capable floaters and ten older, less capable jackups totaling $517.3 million. The impairment charge was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014. We measured the fair value of these rigs by applying either an income approach, using projected discounted cash flows, or a market approach. These valuations were based on unobservable inputs that require significant judgments for which there is limited information, including assumptions regarding future day rates, utilization, operating costs and capital requirements.

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Benefit Plans (Summary Of Option Activity) (Details) (USD $)	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Exercisable as of December 31, 2012, Weighted-Average Exercise Price	$ 41.09

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Description Of The Business And Summary Of Significant Accounting Policies (Schedule Of Income From Discontinued Operations Attributable To Ensco) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Description Of The Business And Summary Of Significant Accounting Policies [Abstract]
(Loss) income from discontinued operations	$ (388.0)	$ 9.2	$ (818.4)	$ (2.0)	$ (37.4)	$ (8.1)	$ 26.0	$ 17.3	$ (1,199.2)	$ (2.2)	$ 100.6
Income from discontinued operations attributable to noncontrolling interests									(0.3)	(1.2)	(0.5)
(Loss) income from discontinued operations attributable to Ensco									$ (1,199.5)	$ (3.4)	$ 100.1

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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

Schedule Of Activity In Our Various Shareholders' Equity

Activity in our various shareholders' equity accounts for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	Shares	Par Value		Additional Paid-in Capital			Retained Earnings			AOCI			Treasury Shares			Noncontrolling Interest
BALANCE, December 31, 2011	235.9	$	23.7	$	5,253.0		$	5,613.1		$	8.6		$	(19.1	)	$	5.2
Net income	—	—		—			1,169.7			—			—			7.0
Dividends paid	—	—		—			(348.1		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(6.5		)
Shares issued under share-based compensation plans, net	1.8	.2		35.3			—			—			(.1		)	—
Equity issuance costs	—	—		66.7			—			—			—			—
Tax deficiency from share-based compensation	—	—		(1.0		)	—			—			—			—
Repurchase of shares	—	—		—			—			—			(11.8		)	—
Share-based compensation cost	—	—		44.7			—			—			—			—
Net other comprehensive income	—	—		—			—			11.5			—			—
BALANCE, December 31, 2012	237.7	23.9		5,398.7			6,434.7			20.1			(31.0		)	5.7
Net income	—	—		—			1,418.2			—			—			9.7
Dividends paid	—	—		—			(525.6		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(8.1		)
Shares issued in connection with share-based compensation plans, net	1.9	.2		21.8			—			—			(.1		)	—
Tax benefit from share-based compensation	—	—		.1			—			—			—			—
Repurchase of shares	—	—		—			—			—			(14.1		)	—
Share-based compensation cost	—	—		46.6			—			—			—			—
Net other comprehensive loss	—	—		—			—			(1.9		)	—			—
BALANCE, December 31, 2013	239.6	24.1		5,467.2			7,327.3			18.2			(45.2		)	7.3
Net (loss) income	—	—		—			(3,902.6		)	—			—			14.1
Dividends paid	—	—		—			(704.3		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(13.5		)
Shares issued in connection with share-based compensation plans, net	1.1	.1		.4			—			—			(.1		)	—
Tax benefit from share-based compensation	—	—		1.2			—			—			—			—
Repurchase of shares	—	—		—			—			—			(13.7		)	—
Share-based compensation cost	—	—		48.7			—			—			—			—
Net other comprehensive loss	—	—		—			—			(6.3		)	—			—
BALANCE, December 31, 2014	240.7	$	24.2	$	5,517.5		$	2,720.4		$	11.9		$	(59.0	)	$	7.9

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Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule Of Derivatives At Fair Value

Derivatives recorded at fair value on our consolidated balance sheets as of December 31, 2014 and 2013 consisted of the following (in millions):

	Derivative Assets				Derivative Liabilities
	2014		2013		2014		2013
Derivatives Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	$	.4	$	9.1	$	17.2	$	9.8
Foreign currency forward contracts - non-current(2)	.1		1.2		2.9		.6
	.5		10.3		20.1		10.4
Derivatives not Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	.2		2.5		6.9		.6
	.2		2.5		6.9		.6
Total	$	.7	$	12.8	$	27.0	$	11.0

⁽¹⁾  Derivative assets and liabilities that have maturity dates equal to or less than 12 months from the respective balance sheet dates were included in other current assets and accrued liabilities and other, respectively, on our consolidated balance sheets.

⁽²⁾  Derivative assets and liabilities that have maturity dates greater than 12 months from the respective balance sheet dates were included in other assets, net, and other liabilities, respectively, on our 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 consolidated statements of operations and comprehensive income for each of the years in the three-year period ended December 31, 2014 were as follows (in millions):

	(Loss) Gain Recognized in Other Comprehensive Income ("OCI") on Derivatives   (Effective Portion)								(Loss) Gain Reclassified from  AOCI into Income (Effective Portion)(1)									Loss Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(2)
	2014			2013			2012		2014			2013			2012			2014			2013			2012
Interest rate lock contracts(3)	$	—		$	—		$	—	$	(.4	)	$	(.4	)	$	(.5	)	$	—		$	—		$	—
Foreign currency forward contracts(4)	(11.7		)	(5.8		)	8.7		1.3			(1.6		)	.5			(.7		)	(.3		)	(.3		)
Total	$	(11.7	)	$	(5.8	)	$	8.7	$	.9		$	(2.0	)	$	—		$	(.7	)	$	(.3	)	$	(.3	)

⁽¹⁾ Changes in the fair value of cash flow hedges are recorded in AOCI.  Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction.

⁽²⁾  Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our consolidated statements of operations.

⁽³⁾  Losses on interest rate lock derivatives reclassified from AOCI into income (effective portion) were included in interest expense, net in our consolidated statements of operations.

⁽⁴⁾  During the year ended December 31, 2014, $400,000 of gains were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations.

Schedule Of Estimated Amount Of Net Gains Associated With Derivatives

As of December 31, 2014, the estimated amount of net losses associated with derivatives, net of tax, that will be reclassified to earnings during the next 12 months was as follows (in millions):

Net unrealized losses to be reclassified to contract drilling expense	$	(9.4	)
Net realized gains to be reclassified to depreciation expense	.9
Net realized losses to be reclassified to interest expense	(.4		)
Net losses to be reclassified to earnings	$	(8.9	)

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Shareholders' Equity (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Stock Repurchase Program, Authorized Amount	$ 2,000,000,000.0
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	35,000,000.0
Stock Repurchased During Period, Shares	0

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Fair Value Measurements (Narrative) (Details) (Supplemental Executive Retirement Plans [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Executive Retirement Plans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in unrealized gains (losses) included in other income	$ 2.3	$ 6.2	$ 2.8

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Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

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

Summary Of Non-Vested Share Award Related Compensation Expense Recognized

The following table summarizes non-vested share award related compensation expense recognized during each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Contract drilling	$	20.9		$	21.3		$	17.1
General and administrative	20.7			21.6			24.8
Non-vested share award related compensation expense included in operating expenses	41.6			42.9			41.9
Tax benefit	(5.1		)	(5.4		)	(7.0		)
Total non-vested share award related compensation expense included in net income	$	36.5		$	37.5		$	34.9

Summary Of Value Of Non-Vested Share Awards Granted And Vested

The following table summarizes the value of non-vested share awards granted and vested during each of the years in the three-year period ended December 31, 2014:

	2014		2013		2012
Weighted-average grant-date fair value of   non-vested share awards granted (per share)	$	51.22	$	59.79	$	48.32
Total fair value of non-vested share awards   vested during the period (in millions)	$	46.2	$	49.6	$	42.5

Summary Of Non-Vested Share Award Activity

The following table summarizes non-vested share award activity for the year ended December 31, 2014 (shares in thousands): 

	Shares		Weighted-Average Grant-Date Fair Value
Non-vested share awards as of December 31, 2013	2,496		$	52.95
Granted	1,242		51.22
Vested	(898	)	51.07
Forfeited	(199	)	53.80
Non-vested share awards as of December 31, 2014	2,641		$	52.86

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Goodwill and Other Intangible Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Changes In The Carrying Amount Of Goodwill

The carrying amount of goodwill as of December 31, 2014 is detailed below by reporting unit (in millions):

	December 31, 2014								December 31, 2013
	Gross Carrying Amount		Accumulated Impairment Losses			Net Carrying Amount			Gross Carrying Amount		Accumulated Impairment Losses		Net Carrying Amount
Floaters
Balance, beginning of period	$	3,081.4	$	—		$	3,081.4		$	3,081.4	$	—	$	3,081.4
Loss on impairment	—		(2,997.9		)	(2,997.9		)	—		—		—
Balance, end of period	$	3,081.4	$	(2,997.9	)	$	83.5		$	3,081.4	$	—	$	3,081.4
Jackups
Balance, beginning of period	$	192.6	$	—		$	192.6		$	192.6	$	—	$	192.6
Loss on impairment	—		—			—			—		—		—
Balance, end of period	$	192.6	$	—		$	192.6		$	192.6	$	—	$	192.6

Schedule of Other Intangible Assets and Liabilities

The gross carrying amounts of our drilling contract intangibles, which we consider to be definite-lived intangibles assets and intangible liabilities, and accumulated amortization as of December 31, 2014 and 2013 were as follows (in millions):

	December 31, 2014								December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount			Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Drilling contract intangible assets
Balance, beginning of period	$	209.0	$	(130.6	)	$	78.4		$	209.0	$	(88.3	)	$	120.7
Amortization	—		(32.7		)	(32.7		)	—		(42.3		)	(42.3		)
Balance, end of period	$	209.0	$	(163.3	)	$	45.7		$	209.0	$	(130.6	)	$	78.4
Drilling contract intangible liabilities
Balance, beginning of period	$	278.0	$	(208.9	)	$	69.1		$	278.0	$	(160.0	)	$	118.0
Amortization	—		(28.4		)	(28.4		)	—		(48.9		)	(48.9		)
Balance, end of period	$	278.0	$	(237.3	)	$	40.7		$	278.0	$	(208.9	)	$	69.1

Schedule of Expected Amortization Income (Expense)

The estimated net (reduction) increase to future operating revenues related to the amortization of these intangible assets and liabilities as of December 31, 2014, is as follows (in millions):

2015	$	(4.5	)
2016	(.8		)
2017	.3
Total	$	(5.0	)

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Fair Value Measurements

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

The following fair value hierarchy table categorizes information regarding our net financial assets measured at fair value on a recurring basis as of December 31, 2014 and 2013 (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 December 31, 2014
Supplemental executive retirement plan assets	$	43.2	$	—		$	—	$	43.2
Total financial assets	$	43.2	$	—		$	—	$	43.2
Derivatives, net	—		(26.3		)	—		(26.3		)
Total financial liabilities	$	—	$	(26.3	)	$	—	$	(26.3	)
As of December 31, 2013
Supplemental executive retirement plan assets	$	37.7	$	—		$	—	$	37.7
Derivatives, net	—		1.8			—		1.8
Total financial assets	$	37.7	$	1.8		$	—	$	39.5

Supplemental Executive Retirement Plans

Our Ensco supplemental executive retirement plans (the "SERP") are non-qualified plans that provide for eligible employees 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 consolidated balance sheets as of December 31, 2014 and 2013.  The fair value measurements of assets held in the SERP were based on quoted market prices. Net unrealized gains of $2.3 million, $6.2 million and $2.8 million from marketable securities held in our SERP were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.

Derivatives

Our derivatives were measured at fair value on a recurring basis using Level 2 inputs as of December 31, 2014 and 2013.  See "Note 5 - 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 measurements of our derivatives were based on market prices that are generally observable for similar assets or liabilities at commonly quoted intervals.

Other Financial Instruments

The carrying values and estimated fair values of our debt instruments as of December 31, 2014 and 2013 were as follows (in millions):

	December 31, 2014				December 31, 2013
	Carrying Value		Estimated   Fair Value		Carrying Value		Estimated   Fair Value
4.70% Senior notes due 2021	$	1,479.9	$	1,505.3	$	1,477.2	$	1,596.9
6.875% Senior notes due 2020	1,008.2		1,008.5		1,024.8		1,086.7
3.25% Senior notes due 2016	998.0		1,018.3		996.5		1,045.8
4.50% Senior notes due 2024	624.2		602.0		—		—
5.75% Senior notes due 2044	622.3		615.8		—		—
8.50% Senior notes due 2019	583.8		611.8		600.5		635.8
7.875% Senior notes due 2040	381.2		363.8		382.6		410.5
7.20% Debentures due 2027	149.2		171.4		149.1		178.6
4.33% MARAD bonds, including current maturities, due 2016	46.6		46.8		78.9		79.7
6.36% MARAD bonds, including current maturities, due 2015	—		—		25.3		27.1
4.65% MARAD bonds, including current maturities, due 2020	27.0		29.7		31.5		35.2
Total	$	5,920.4	$	5,973.4	$	4,766.4	$	5,096.3

The estimated fair values of our senior notes and debentures were determined using quoted market prices. The estimated fair values of our U.S. Maritime Administration ("MARAD") bonds were determined using an income approach valuation model. The estimated fair values of our cash and cash equivalents, short-term investments, receivables, trade payables and other liabilities approximated their carrying values as of December 31, 2014 and 2013.

See "Note 3 - Property and Equipment" for additional information on the fair value measurement of property and equipment and "Note 8 - Goodwill and Other Intangible Assets and Liabilities" for additional information on the fair value measurement of goodwill.

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

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

Summary Of Components Of Provision For Income Taxes From Continuing Operations

The following table summarizes components of the provision for income taxes from continuing operations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Current income tax expense:
U.S.	$	114.8		$	94.4		$	46.6
Non-U.S.	149.2			98.6			154.2
	264.0			193.0			200.8
Deferred income tax expense (benefit):
U.S.	(86.7		)	19.2			29.4
Non-U.S.	(36.8		)	(9.1		)	(1.6		)
	(123.5		)	10.1			27.8
Total income tax expense	$	140.5		$	203.1		$	228.6

Summary Of Significant Components Of Deferred Income Tax Assets (Liabilities)

The following table summarizes significant components of deferred income tax assets (liabilities) as of December 31, 2014 and 2013 (in millions):

	2014			2013
Deferred tax assets:
Net operating loss carryforwards	$	204.5		$	104.0
Deferred revenue	103.0			19.4
Premium on long-term debt	99.2			111.9
Foreign tax credits	98.6			159.0
Employee benefits, including share-based compensation	39.5			41.7
Other	16.7			19.8
Total deferred tax assets	561.5			455.8
Valuation allowance	(271.3		)	(232.6		)
Net deferred tax assets	290.2			223.2
Deferred tax liabilities:
Property and equipment	(314.2		)	(453.6		)
Intercompany transfers of property	(23.0		)	(29.2		)
Deferred costs	(20.2		)	(11.4		)
Other	(14.1		)	(24.0		)
Total deferred tax liabilities	(371.5		)	(518.2		)
Net deferred tax liability	$	(81.3	)	$	(295.0	)
Net current deferred tax asset	$	41.4		$	20.9
Net noncurrent deferred tax liability	(122.7		)	(315.9		)
Net deferred tax liability	$	(81.3	)	$	(295.0	)

Summary Of Effective Income Tax Rate On Continuing Operations

Our consolidated effective income tax rate on continuing operations for each of the years in the three-year period ended December 31, 2014, differs from the U.K. statutory income tax rate as follows:

	2014		2013		2012
U.K. statutory income tax rate	21.5	%	23.3	%	24.5	%
Goodwill impairment	(25.3	)	—		—
Assets impairment	(10.9	)	—		—
Non-U.K. taxes	9.6		(13.2	)	(17.5	)
Valuation allowance	(1.1	)	1.0		5.0
Income taxes associated with restructuring transactions	—		—		3.9
Other	.7		1.3		1.6
Effective income tax rate	(5.5	)%	12.4	%	17.5	%

Summary Of Reconciliation Of The Beginning And Ending Amount Of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2014 and 2013 is as follows (in millions):

	2014			2013
Balance, beginning of year	$	151.7		$	110.7
Increases in unrecognized tax benefits as a result       of tax positions taken during prior years	16.3			35.8
Increases in unrecognized tax benefits as a result       of tax positions taken during the current year	5.5			10.0
Decreases in unrecognized tax benefits as a result       of tax positions taken during prior years	(15.5		)	(3.7		)
Settlements with taxing authorities	(14.2		)	—
Lapse of applicable statutes of limitations	(.7		)	(1.1		)
Impact of foreign currency exchange rates	(8.7		)	—
Balance, end of year	$	134.4		$	151.7

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Supplemental Financial Information (Accrued Liabilities And Other) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Supplemental Financial Information [Abstract]
Personnel costs	$ 214.0	$ 242.0
Deferred revenue	241.3	169.8
Taxes	97.0	84.2
Accrued interest	83.8	68.0
Prepayment Liability for Sale of Assets, Current	0	33.0
Derivative Liability	24.1	10.4
Customer Prepayments, Current	0	20.0
Other	36.4	31.3
Accrued liabilities and other	$ 696.6	$ 658.7

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Description Of The Business And Summary Of Significant Accounting Policies Description Of The Business And Summary Of Significant Accounting Policies (Reconciliation Of Net Income Attributable To Ensco Shares Used In Basic And Diluted EPS Computations) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Description Of The Business And Summary Of Significant Accounting Policies [Abstract]
Income (Loss) from Continuing Operations Attributable to Parent	$ (2,703.1)	$ 1,421.6	$ 1,069.6
Other Preferred Stock Dividends and Adjustments	7.9	15.1	11.2
Income (Loss) from Continuing Operations Attributable to Parent, Available to Common Stockholders	$ (2,711.0)	$ 1,406.5	$ 1,058.4

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Derivative Instruments (Schedule Of Derivatives At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Derivative [Line Items]
Total fair value of derivative assets	$ 0.7		$ 12.8
Total fair value of derivative liabilities	27.0		11.0
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Total fair value of derivative assets	0.5		10.3
Total fair value of derivative liabilities	20.1		10.4
Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts - Current [Member]
Derivative [Line Items]
Total fair value of derivative assets	0.4	[1]	9.1	[1]
Total fair value of derivative liabilities	17.2	[1]	9.8	[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]	1.2	[2]
Total fair value of derivative liabilities	2.9	[2]	0.6	[2]
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Total fair value of derivative assets	0.2		2.5
Total fair value of derivative liabilities	6.9		0.6
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts - Current [Member]
Derivative [Line Items]
Total fair value of derivative assets	0.2	[1]	2.5	[1]
Total fair value of derivative liabilities	$ 6.9	[1]	$ 0.6	[1]

[1] Derivative assets and liabilities that have maturity dates equal to or less than 12 months from the respective balance sheet dates were included in other current assets and accrued liabilities and other, respectively, on our consolidated balance sheets.

[2] Derivative assets and liabilities that have maturity dates greater than 12 months from the respective balance sheet dates were included in other assets, net, and other liabilities, respectively, on our consolidated balance sheets.

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Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 occurrence plaintiffs	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2009 mi
Oil and Gas Delivery Commitments and Contracts [Line Items]
Aggregate Contractual Capital Commitments Due In One Year	$ 1,353.5
Rental expenses	54.4	49.1	46.9
2014	77.3
2015	31.8
2016	16.2
2017	10.6
2018	10.2
Thereafter	55.0
Distance from original drilling location in miles				95
Liability insurance self-insured retention per occurrence	10.0
Annual liability coverage limit for wreckage and debris removal costs	490.0
Damages sought	5.0
Civil litigation claim damages for cost of repairs and business interruption due to pipeline rupture	26.0
Litigation Settlement, Amount	9.6
Legal Fees	3.6
Estimated Litigation Liability	6.4
Litigation Settlement, Amount to be Paid by Underwriters	3.2
Liability insurance self-insured retention	15.0
Number of occurrences	2
Liability insurance self-insured retention for each occurrence thereafter	1.0
Number of plaintiffs	125
Loss Contingency, Claims Settled, Number	58
Letters of Credit Outstanding, Amount	263.9
Rig Enhancement Projects [Member]
Oil and Gas Delivery Commitments and Contracts [Line Items]
Aggregate Contractual Capital Commitments Due In One Year	42.8
Ensco 29 [Member]
Oil and Gas Delivery Commitments and Contracts [Line Items]
Annual liability coverage limit for wreckage and debris removal costs	$ 4.0

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Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
OPERATING REVENUES	$ 4,564.5	$ 4,323.4	$ 3,638.8
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	2,076.9	1,947.1	1,642.8
Asset Impairment Charges	4,218.7	0	0
Depreciation	537.9	496.2	443.8
General and administrative	131.9	146.8	148.9
Total operating expenses	6,965.4	2,590.1	2,235.5
OPERATING INCOME	(2,400.9)	1,733.3	1,403.3
OTHER INCOME (EXPENSE)
Interest income	13.0	16.6	22.8
Interest expense, net	(161.4)	(158.8)	(123.6)
Other, net	0.5	42.1	2.2
Other income (expense), net	(147.9)	(100.1)	(98.6)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(2,548.8)	1,633.2	1,304.7
PROVISION FOR INCOME TAXES
Current income tax expense	264.0	193.0	200.8
Deferred income tax expense (benefit)	(123.5)	10.1	27.8
Total provision for income taxes	140.5	203.1	228.6
INCOME FROM CONTINUING OPERATIONS	(2,689.3)	1,430.1	1,076.1
DISCONTINUED OPERATIONS, NET	(1,199.2)	(2.2)	100.6
NET INCOME	(3,888.5)	1,427.9	1,176.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(14.1)	(9.7)	(7.0)
NET INCOME ATTRIBUTABLE TO ENSCO	(3,902.6)	1,418.2	1,169.7
EARNINGS PER SHARE - BASIC
Continuing operations	$ (11.70)	$ 6.09	$ 4.62
Discontinued operations	$ (5.18)	$ (0.01)	$ 0.43
Total earnings per share - basic	$ (16.88)	$ 6.08	$ 5.05
EARNINGS PER SHARE - DILUTED
Continuing operations	$ (11.70)	$ 6.08	$ 4.61
Discontinued operations	$ (5.18)	$ (0.01)	$ 0.43
Total earnings per share - diluted	$ (16.88)	$ 6.07	$ 5.04
NET INCOME ATTRIBUTABLE TO ENSCO SHARES - BASIC AND DILUTED	$ (3,910.5)	$ 1,403.1	$ 1,157.4
WEIGHTED-AVERAGE SHARES OUTSTANDING
Basic	231.6	230.9	229.4
Diluted	231.6	231.1	229.7
CASH DIVIDENDS PER SHARE	$ 3.0	$ 2.25	$ 1.50

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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	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Supplemental executive retirement plan assets	$ 43.2	$ 37.7
Derivatives, net		1.8
Total financial assets	43.2	39.5
Derivative Assets (Liabilities), at Fair Value, Net	(26.3)
Financial Liabilities Fair Value Disclosure	(26.3)
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	43.2	37.7
Derivatives, net		0
Total financial assets	43.2	37.7
Derivative Assets (Liabilities), at Fair Value, Net	0
Financial Liabilities Fair Value Disclosure	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		1.8
Total financial assets	0	1.8
Derivative Assets (Liabilities), at Fair Value, Net	(26.3)
Financial Liabilities Fair Value Disclosure	(26.3)
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
Derivative Assets (Liabilities), at Fair Value, Net	0
Financial Liabilities Fair Value Disclosure	$ 0

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Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES
Net income	$ (3,888.5)	$ 1,427.9	$ 1,176.7
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	1,199.2	2.2	(100.6)
Asset Impairment Charges	4,218.7	0	0
Cost of Services, Depreciation	537.9	496.2	443.8
Settlement of warranty or other claims	0	(11.0)	(57.9)
Share-based compensation expense	45.1	50.3	53.2
Amortization of intangibles and other, net	(7.9)	(28.4)	(33.6)
Deferred income tax expense (benefit)	(123.5)	10.1	27.8
Other	(16.4)	15.0	6.0
Changes in operating assets and liabilities	93.3	(151.1)	439.2
Net cash provided by operating activities of continuing operations	2,057.9	1,811.2	1,954.6
INVESTING ACTIVITIES
Additions to property and equipment	(1,568.8)	(1,763.5)	(1,713.2)
Purchases of short-term investments	(790.6)	(50.0)	(90.0)
Proceeds from Sale of Property, Plant, and Equipment	169.2	6.0	3.2
Maturities of short-term investments	83.3	50.0	44.5
Net cash used in investing activities of continuing operations	(2,106.9)	(1,757.5)	(1,755.5)
FINANCING ACTIVITIES
Cash dividends paid	(703.0)	(525.6)	(348.1)
Reduction of long-term borrowings	(60.1)	(47.5)	(47.5)
Proceeds from exercise of share options	2.6	22.3	35.8
Debt financing costs	(13.4)	(4.6)	0
Commercial paper borrowings, net	0	0	(125.0)
Equity financing costs	0	0	66.7
Proceeds from issuance of senior notes	1,246.4	0	0
Other	(29.8)	(21.7)	(17.4)
Net cash (used in) provided by financing activities of continuing operations	442.7	(577.1)	(435.5)
DISCONTINUED OPERATIONS
Operating activities	(3.8)	169.3	232.5
Investing activities	109.3	32.8	58.3
Net Cash Provided by (Used in) Discontinued Operations	105.5	202.1	290.8
Effect of exchange rate changes on cash and cash equivalents	0	(0.2)	2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	499.2	(321.5)	56.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	165.6	487.1	430.7
CASH AND CASH EQUIVALENTS, END OF YEAR	664.8	165.6	487.1
Ensco Plc [Member]
OPERATING ACTIVITIES
Net income	(3,902.6)	1,418.2	1,169.7
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0	0	0
Asset Impairment Charges	0
Cost of Services, Depreciation	0.2	0.3	0.4
Net cash provided by operating activities of continuing operations	(63.8)	(114.8)	(71.6)
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	(716.1)	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	(0.3)
Maturities of short-term investments	0	0	0
FINANCING ACTIVITIES
Cash dividends paid	(703.0)	(525.6)	(348.1)
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	2.6	22.3	23.9
Debt financing costs	(13.4)	0
Commercial paper borrowings, net			(125.0)
Equity financing costs			66.7
Proceeds from issuance of senior notes	1,246.4
Other	(13.7)	(14.4)	(11.6)
Net cash (used in) provided by financing activities of continuing operations	1,020.8	(110.5)	107.1
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net Cash Provided by (Used in) Discontinued Operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	240.9	(225.3)	35.2
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	46.5	271.8	236.6
CASH AND CASH EQUIVALENTS, END OF YEAR	287.4	46.5	271.8
Ensco International Inc [Member]
OPERATING ACTIVITIES
Net income	(3,657.4)	259.8	256.2
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0	0	0
Asset Impairment Charges	0
Cost of Services, Depreciation	7.6	4.0	3.5
Net cash provided by operating activities of continuing operations	(167.6)	(128.7)	(38.2)
INVESTING ACTIVITIES
Additions to property and equipment	(37.2)	0	0
Purchases of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	(4.1)	0.4
Maturities of short-term investments	0	0	0
FINANCING ACTIVITIES
Cash dividends paid	0	0	0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	11.9
Debt financing costs	0	(4.6)
Commercial paper borrowings, net			0
Equity financing costs			0
Proceeds from issuance of senior notes	0
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	204.3	131.6	39.5
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net Cash Provided by (Used in) Discontinued Operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(0.5)	(1.2)	1.7
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	0.5	1.7	0
CASH AND CASH EQUIVALENTS, END OF YEAR	0	0.5	1.7
Pride International Inc Member
OPERATING ACTIVITIES
Net income	(3,799.0)	83.7	189.2
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0	0	0
Asset Impairment Charges	0
Cost of Services, Depreciation	0	0	0
Net cash provided by operating activities of continuing operations	(90.9)	(62.9)	(21.6)
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	0
Maturities of short-term investments	0	0	0
FINANCING ACTIVITIES
Cash dividends paid	0	0	0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Proceeds from issuance of senior notes	0
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	176.8	(17.2)	84.0
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net Cash Provided by (Used in) Discontinued Operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	85.9	(80.1)	62.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4.9	85.0	22.6
CASH AND CASH EQUIVALENTS, END OF YEAR	90.8	4.9	85.0
Other Non Guarantor Subsidiaries Member
OPERATING ACTIVITIES
Net income	(3,710.9)	1,684.1	1,419.6
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	1,199.2	2.2	(100.6)
Asset Impairment Charges	4,218.7
Cost of Services, Depreciation	530.1	491.9	439.9
Net cash provided by operating activities of continuing operations	2,380.2	2,117.6	2,086.0
INVESTING ACTIVITIES
Additions to property and equipment	(1,531.6)	(1,763.5)	(1,713.2)
Purchases of short-term investments	(74.5)	(50.0)	(90.0)
Proceeds from Sale of Property, Plant, and Equipment	169.2	10.1	3.1
Maturities of short-term investments	83.3	50.0	44.5
FINANCING ACTIVITIES
Cash dividends paid	0	0	0
Reduction of long-term borrowings	(60.1)	(47.5)	(47.5)
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Proceeds from issuance of senior notes	0
Other	(16.1)	(7.3)	(5.8)
Net cash (used in) provided by financing activities of continuing operations	(959.2)	(581.0)	(666.1)
DISCONTINUED OPERATIONS
Operating activities	(3.8)	169.3	232.5
Investing activities	109.3	32.8	58.3
Net Cash Provided by (Used in) Discontinued Operations	105.5	202.1	290.8
Effect of exchange rate changes on cash and cash equivalents	0	(0.2)	2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	172.9	(14.9)	(42.9)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	113.7	128.6	171.5
CASH AND CASH EQUIVALENTS, END OF YEAR	286.6	113.7	128.6
Consolidated Adjustments Member
OPERATING ACTIVITIES
Net income	11,181.4	(2,017.9)	(1,858.0)
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0	0
Asset Impairment Charges	0
Cost of Services, Depreciation	0	0	0
Net cash provided by operating activities of continuing operations	0	0	0
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	0
Maturities of short-term investments	0	0	0
FINANCING ACTIVITIES
Cash dividends paid	0	0	0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Proceeds from issuance of senior notes	0
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	0	0	0
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net Cash Provided by (Used in) Discontinued Operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	0	0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	0	0	0
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 0	$ 0	$ 0

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Unaudited Quarterly Financial Data (Summary Of Unaudited Quarterly Consolidated Income Statement) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Data [Abstract]
OPERATING REVENUES	$ 1,159.8	$ 1,201.4	$ 1,136.6	$ 1,066.7	$ 1,138.0	$ 1,119.9	$ 1,076.1	$ 989.4	$ 4,564.5	$ 4,323.4	$ 3,638.8
Contract drilling (exclusive of depreciation)	514.0	500.2	542.5	520.2	500.4	499.2	496.1	451.4	2,076.9	1,947.1	1,642.8
Asset Impairment Charges	3,515.2	0	703.5	0					4,218.7	0	0
Depreciation	139.4	135.2	132.2	131.1	127.5	124.7	124.0	120.0	537.9	496.2	443.8
General and administrative	28.3	29.3	36.2	38.1	35.2	37.4	36.4	37.8	131.9	146.8	148.9
OPERATING INCOME	(3,037.1)	536.7	(277.8)	377.3	474.9	458.6	419.6	380.2	(2,400.9)	1,733.3	1,403.3
Other income (expense), net	(49.6)	(38.4)	(30.8)	(29.1)	(28.9)	(1.6)	(39.8)	(29.8)	(147.9)	(100.1)	(98.6)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(3,086.7)	498.3	(308.6)	348.2	446.0	457.0	379.8	350.4	(2,548.8)	1,633.2	1,304.7
Provision for income taxes	(26.2)	74.6	42.6	49.5	44.6	67.5	43.2	47.8	140.5	203.1	228.6
Income from continuing operations	(3,060.5)	423.7	(351.2)	298.7	401.4	389.5	336.6	302.6	(2,689.3)	1,430.1	1,076.1
DISCONTINUED OPERATIONS, NET	(388.0)	9.2	(818.4)	(2.0)	(37.4)	(8.1)	26.0	17.3	(1,199.2)	(2.2)	100.6
NET INCOME	(3,448.5)	432.9	(1,169.6)	296.7	364.0	381.4	362.6	319.9	(3,888.5)	1,427.9	1,176.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(3.3)	(3.5)	(3.1)	(4.2)	(2.6)	(2.6)	(1.7)	(2.8)	(14.1)	(9.7)	(7.0)
NET INCOME ATTRIBUTABLE TO ENSCO	$ (3,451.8)	$ 429.4	$ (1,172.7)	$ 292.5	$ 361.4	$ 378.8	$ 360.9	$ 317.1	$ (3,902.6)	$ 1,418.2	$ 1,169.7
EARNINGS PER SHARE - BASIC
Continuing operations	$ (13.22)	$ 1.79	$ (1.53)	$ 1.26	$ 1.71	$ 1.66	$ 1.44	$ 1.29	$ (11.70)	$ 6.09	$ 4.62
Discontinued operations	$ (1.67)	$ 0.04	$ (3.54)	$ (0.01)	$ (0.16)	$ (0.04)	$ 0.11	$ 0.07	$ (5.18)	$ (0.01)	$ 0.43
Total earnings per share - basic	$ (14.89)	$ 1.83	$ (5.07)	$ 1.25	$ 1.55	$ 1.62	$ 1.55	$ 1.36	$ (16.88)	$ 6.08	$ 5.05
EARNINGS PER SHARE - DILUTED
Continuing operations	$ (13.22)	$ 1.79	$ (1.53)	$ 1.26	$ 1.70	$ 1.66	$ 1.44	$ 1.29	$ (11.70)	$ 6.08	$ 4.61
Discontinued operations	$ (1.67)	$ 0.04	$ (3.54)	$ (0.01)	$ (0.16)	$ (0.04)	$ 0.11	$ 0.07	$ (5.18)	$ (0.01)	$ 0.43
Total earnings per share - diluted	$ (14.89)	$ 1.83	$ (5.07)	$ 1.25	$ 1.54	$ 1.62	$ 1.55	$ 1.36	$ (16.88)	$ 6.07	$ 5.04

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Benefit Plans (Summary Of Non-Vested Share Award Related Compensation Expense Recognized) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Tax benefit	$ (5.1)	$ (5.4)	$ (7.0)
Total non-vested share award related compensation expense included in net income	36.5	37.5	34.9
Contract Drilling [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Non-vested share award related compensation expense	20.9	21.3	17.1
General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Non-vested share award related compensation expense	20.7	21.6	24.8
Operating Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Non-vested share award related compensation expense	$ 41.6	$ 42.9	$ 41.9

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Segment Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Schedule Of Segment Reporting Information

Year Ended December 31, 2014

	Floaters			Jackups		Other		Operating Segments Total			Reconciling Items			Consolidated Total
Revenues	$	2,697.6		$	1,774.6	$	92.3	$	4,564.5		$	—		$	4,564.5
Operating expenses
Contract drilling   (exclusive of depreciation)	1,201.2			807.4		68.3		2,076.9			—			2,076.9
Loss on impairment	3,982.3			236.4		—		4,218.7			—			4,218.7
Depreciation	358.1			171.2		—		529.3			8.6			537.9
General and administrative	—			—		—		—			131.9			131.9
Operating (loss) income	$	(2,844.0	)	$	559.6	$	24.0	$	(2,260.4	)	$	(140.5	)	$	(2,400.9	)
Property and equipment, net	$	9,462.3		$	2,995.3	$	—	$	12,457.6		$	77.2		$	12,534.8
Capital expenditures	$	856.2		$	667.7	$	—	$	1,523.9		$	44.9		$	1,568.8

Year Ended December 31, 2013

	Floaters		Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	2,659.6	$	1,588.7	$	75.1	$	4,323.4	$	—		$	4,323.4
Operating expenses
Contract drilling   (exclusive of depreciation)	1,126.0		762.6		58.5		1,947.1		—			1,947.1
Depreciation	342.2		147.5		—		489.7		6.5			496.2
General and administrative	—		—		—		—		146.8			146.8
Operating income (loss)	$	1,191.4	$	678.6	$	16.6	$	1,886.6	$	(153.3	)	$	1,733.3
Property and equipment, net	$	11,303.4	$	2,961.6	$	—	$	14,265.0	$	46.0		$	14,311.0
Capital expenditures	$	1,028.6	$	708.3	$	—	$	1,736.9	$	26.6		$	1,763.5

Year Ended December 31, 2012

	Floaters		Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	2,149.1	$	1,406.9	$	82.8	$	3,638.8	$	—		$	3,638.8
Operating expenses
Contract drilling   (exclusive of depreciation)	894.5		687.2		61.1		1,642.8		—			1,642.8
Depreciation	283.3		151.6		—		434.9		8.9			443.8
General and administrative	—		—		—		—		148.9			148.9
Operating income (loss)	$	971.3	$	568.1	$	21.7	$	1,561.1	$	(157.8	)	$	1,403.3
Property and equipment, net	$	10,727.6	$	2,389.8	$	—	$	13,117.4	$	28.2		$	13,145.6
Capital expenditures	$	1,519.4	$	191.1	$	—	$	1,710.5	$	2.7		$	1,713.2

Schedule Of Geographic Distribution Of Rigs By Segment

As of December 31, 2014, the geographic distribution of our drilling rigs by operating segment was as follows:

	Floaters(1)	Jackups(1)	Total(2)
North & South America (excluding Brazil)	9	8	17
Middle East & Africa	4	11	15
Europe & the Mediterranean	4	11	15
Asia & Pacific Rim	4	8	12
Asia & Pacific Rim (under construction)	3	2	5
Brazil	4	—	4
Middle East & Africa (under construction)	—	2	2
Total	28	42	70

⁽¹⁾  The five floaters and two jackups classified as "held for sale" as of December 31, 2014 are included in the table above.

⁽²⁾  We provide management services on six rigs owned by third-parties not included in the table above. 

Schedule Of Revenues And Long-Lived Assets By Geographical Segment

Information by country for those countries that account for more than 10% of total revenues or 10% of our long-lived assets was as follows (in millions):

	Revenues						Long-lived Assets
	2014		2013		2012		2014		2013		2012
United States	$	1,712.4	$	1,687.2	$	1,265.5	$	5,240.4	$	4,617.8	$	4,525.9
Angola	607.9		365.9		190.0		1,913.5		2,543.7		2,147.2
Brazil	459.1		683.7		776.3		1,459.0		2,447.5		2,911.3
Other countries	1,785.1		1,586.6		1,407.0		3,921.9		4,702.0		3,561.2
Total	$	4,564.5	$	4,323.4	$	3,638.8	$	12,534.8	$	14,311.0	$	13,145.6

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Income Taxes (Summary Of Components Of Provision For Income Taxes From Continuing Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current income tax expense, U.S.									$ 114.8	$ 94.4	$ 46.6
Current income tax expense, Non-U.S.									149.2	98.6	154.2
Current Income Tax Expense, Total									264.0	193.0	200.8
Deferred income tax expense (benefit), U.S.									(86.7)	19.2	29.4
Deferred income tax expense (benefit), Non-U.S.									(36.8)	(9.1)	(1.6)
Deferred income tax expense									(123.5)	10.1	27.8
Income Tax Expense (Benefit)	$ (26.2)	$ 74.6	$ 42.6	$ 49.5	$ 44.6	$ 67.5	$ 43.2	$ 47.8	$ 140.5	$ 203.1	$ 228.6

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Unaudited Quarterly Financial Data

12 Months Ended

Dec. 31, 2014

Quarterly Financial Data [Abstract]

Unaudited Quarterly Financial Data

UNAUDITED QUARTERLY FINANCIAL DATA

The following tables summarize our unaudited quarterly consolidated income statement data for the years ended December 31, 2014 and 2013 (in millions, except per share amounts):

2014	First  Quarter			Second Quarter			Third Quarter			Fourth  Quarter			Year
Operating revenues	$	1,066.7		$	1,136.6		$	1,201.4		$	1,159.8		$	4,564.5
Operating expenses
Contract drilling (exclusive of depreciation)	520.2			542.5			500.2			514.0			2,076.9
Loss on impairment	—			703.5			—			3,515.2			4,218.7
Depreciation	131.1			132.2			135.2			139.4			537.9
General and administrative	38.1			36.2			29.3			28.3			131.9
Operating income	377.3			(277.8		)	536.7			(3,037.1		)	(2,400.9		)
Other expense, net	(29.1		)	(30.8		)	(38.4		)	(49.6		)	(147.9		)
Income (loss) from continuing operations before income taxes	348.2			(308.6		)	498.3			(3,086.7		)	(2,548.8		)
Income tax expense (benefit)	49.5			42.6			74.6			(26.2		)	140.5
Income (loss) from continuing operations	298.7			(351.2		)	423.7			(3,060.5		)	(2,689.3		)
(Loss) income from discontinued operations, net	(2.0		)	(818.4		)	9.2			(388.0		)	(1,199.2		)
Net income (loss)	296.7			(1,169.6		)	432.9			(3,448.5		)	(3,888.5		)
Net income attributable to noncontrolling interests	(4.2		)	(3.1		)	(3.5		)	(3.3		)	(14.1		)
Net income (loss) attributable to Ensco	$	292.5		$	(1,172.7	)	$	429.4		$	(3,451.8	)	$	(3,902.6	)
Earnings (loss) per share – basic
Continuing operations	$	1.26		$	(1.53	)	$	1.79		$	(13.22	)	$	(11.70	)
Discontinued operations	(0.01		)	(3.54		)	0.04			(1.67		)	(5.18		)
	$	1.25		$	(5.07	)	$	1.83		$	(14.89	)	$	(16.88	)
Earnings (loss) per share – diluted
Continuing operations	$	1.26		$	(1.53	)	$	1.79		$	(13.22	)	$	(11.70	)
Discontinued operations	(0.01		)	(3.54		)	0.04			(1.67		)	(5.18		)
	$	1.25		$	(5.07	)	$	1.83		$	(14.89	)	$	(16.88	)

2013	First  Quarter			Second Quarter			Third Quarter			Fourth  Quarter			Year
Operating revenues	$	989.4		$	1,076.1		$	1,119.9		$	1,138.0		$	4,323.4
Operating expenses
Contract drilling (exclusive of depreciation)	451.4			496.1			499.2			500.4			1,947.1
Depreciation	120.0			124.0			124.7			127.5			496.2
General and administrative	37.8			36.4			37.4			35.2			146.8
Operating income	380.2			419.6			458.6			474.9			1,733.3
Other expense, net	(29.8		)	(39.8		)	(1.6		)	(28.9		)	(100.1		)
Income from continuing operations before income taxes	350.4			379.8			457.0			446.0			1,633.2
Income tax expense	47.8			43.2			67.5			44.6			203.1
Income from continuing operations	302.6			336.6			389.5			401.4			1,430.1
Income (loss) from discontinued operations, net	17.3			26.0			(8.1		)	(37.4		)	(2.2		)
Net income	319.9			362.6			381.4			364.0			1,427.9
Net income attributable to noncontrolling interests	(2.8		)	(1.7		)	(2.6		)	(2.6		)	(9.7		)
Net income attributable to Ensco	$	317.1		$	360.9		$	378.8		$	361.4		$	1,418.2
Earnings (loss) per share – basic
Continuing operations	$	1.29		$	1.44		$	1.66		$	1.71		$	6.09
Discontinued operations	0.07			0.11			(0.04		)	(0.16		)	(0.01		)
	$	1.36		$	1.55		$	1.62		$	1.55		$	6.08
Earnings (loss) per share – diluted
Continuing operations	$	1.29		$	1.44		$	1.66		$	1.70		$	6.08
Discontinued operations	0.07			0.11			(0.04		)	(0.16		)	(0.01		)
	$	1.36		$	1.55		$	1.62		$	1.54		$	6.07

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Supplemental Financial Information (Tables)

12 Months Ended

Dec. 31, 2014

Supplemental Financial Information [Abstract]

Accounts Receivable, Net

Accounts receivable, net, as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014			2013
Trade	$	878.8		$	869.8
Other	15.9			14.3
	894.7			884.1
Allowance for doubtful accounts	(11.4		)	(28.4		)
	$	883.3		$	855.7

Other Current Assets

Other current assets as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Inventory	240.3		256.4
Assets held for sale	152.4		8.6
Prepaid taxes	90.6		88.1
Deferred costs	61.9		47.4
Deferred tax assets	43.8		23.1
Prepaid expenses	33.8		18.5
Derivative assets	.6		11.6
Other	6.0		10.2
	$	629.4	$	463.9

Other Assets, Net

Other assets, net, as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred costs	$	82.3	$	59.1
Intangible assets	49.0		83.8
Supplemental executive retirement plan assets	43.2		37.7
Prepaid taxes on intercompany transfers of property	39.7		50.2
Deferred tax assets	38.4		25.2
Warranty and other claim receivables	30.6		30.6
Unbilled receivables	18.6		51.9
Other	12.4		14.2
	$	314.2	$	352.7

Accrued Liabilities And Other

Accrued liabilities and other as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred revenue	241.3		169.8
Personnel costs	214.0		242.0
Taxes	97.0		84.2
Accrued interest	83.8		68.0
Derivative liabilities	24.1		10.4
Advance payment received on sale of assets	—		33.0
Customer pre-payments	—		20.0
Other	36.4		31.3
	$	696.6	$	658.7

Other Liabilities

Other liabilities as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred revenue	$	373.2	$	217.6
Unrecognized tax benefits (inclusive of interest and penalties)	142.4		148.0
Supplemental executive retirement plan liabilities	45.1		40.5
Intangible liabilities	40.7		69.1
Personnel costs	26.1		37.2
Other	39.8		33.3
	$	667.3	$	545.7

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated other comprehensive income as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Derivative Instruments	$	8.0	$	20.6
Other	3.9		(2.4		)
	$	11.9	$	18.2

Repair And Maintenance Expense Related To Continuing Operations

Repair and maintenance expense related to continuing operations for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014		2013		2012
Repair and maintenance expense	$	357.2	$	287.8	$	276.3

Schedule of Cash Flows Information

Net cash provided by operating activities of continuing operations attributable to the net change in operating assets and liabilities for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
Increase (decrease) in liabilities	208.2			(10.3		)	312.3
(Increase) decrease in other assets	(76.4		)	(94.1		)	67.8
(Increase) decrease in accounts receivable	(38.5		)	(46.7		)	59.1
	$	93.3		$	(151.1	)	$	439.2

Cash Paid For Interest And Income Taxes

Cash paid for interest and income taxes for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014		2013		2012
Interest, net of amounts capitalized	$	170.0	$	182.2	$	150.7
Income taxes	218.2		195.4		77.9

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Description Of The Business And Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Description Of The Business And Summary Of Significant Accounting Policies [Abstract]

Reconciliation Of Net Income Attributable To Ensco Shares Used In Basic And Diluted EPS Computations

The following table is a reconciliation of (loss) income from continuing operations attributable to Ensco shares used in our basic and diluted EPS computations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
(Loss) income from continuing operations attributable to Ensco	$	(2,703.1	)	$	1,421.6		$	1,069.6
Income from continuing operations allocated to non-vested share awards	(7.9		)	(15.1		)	(11.2		)
(Loss) income from continuing operations attributable to Ensco shares	$	(2,711.0	)	$	1,406.5		$	1,058.4

Reconciliation Of The Weighted-Average Shares Used In Basic And Diluted Earnings Per Share Computations

The following table is a reconciliation of the weighted-average shares used in our basic and diluted earnings per share computations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014	2013	2012
Weighted-average shares - basic	231.6	230.9	229.4
Potentially dilutive shares	—	.2	.3
Weighted-average shares - diluted	231.6	231.1	229.7

Schedule Of Income From Continuing Operations Attributable To Ensco

(Loss) income from continuing operations attributable to Ensco for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
(Loss) income from continuing operations	$	(2,689.3	)	$	1,430.1		$	1,076.1
Income from continuing operations attributable to noncontrolling interests	(13.8		)	(8.5		)	(6.5		)
(Loss) income from continuing operations attributable to Ensco	$	(2,703.1	)	$	1,421.6		$	1,069.6

Reconciliation of Income (Loss) from Discontinued Operations [Table Text Block]

(Loss) income from discontinued operations attributable to Ensco for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
(Loss) income from discontinued operations	$	(1,199.2	)	$	(2.2	)	$	100.6
Income from discontinued operations attributable to noncontrolling interests	(.3		)	(1.2		)	(.5		)
(Loss) income from discontinued operations attributable to Ensco	$	(1,199.5	)	$	(3.4	)	$	100.1

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Income Taxes (Summary Of Reconciliation Of The Beginning And Ending Amount Of Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Balance, beginning of year	$ 151.7	$ 110.7
Increases in unrecognized tax benefits as a result of tax positions taken during prior years	16.3	35.8
Increases in unrecognized tax benefits as a result of tax positions taken during the current year	5.5	10.0
Decreases in unrecognized tax benefits as a result of tax positions taken during prior years	(15.5)	(3.7)
Settlements with taxing authorities	(14.2)	0
Lapse of applicable statutes of limitations	(0.7)	(1.1)
Impact of foreign currency exchange rates	(8.7)	0
Balance, end of year	$ 134.4	$ 151.7

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Description Of The Business And Summary Of Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Description Of The Business And Summary Of Significant Accounting Policies [Abstract]

Description Of The Business And Summary Of Significant Accounting Policies

DESCRIPTION OF THE BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Business

We are one of the leading providers of offshore contract drilling services to the international oil and gas industry. We own an offshore drilling rig fleet of 70 rigs, including seven rigs under construction, spanning most of the strategic markets around the globe. Our rig fleet includes ten drillships, 13 dynamically positioned semisubmersible rigs, five moored semisubmersible rigs and 42 jackup rigs.  Our fleet is the world's second largest amongst competitive rigs, our ultra-deepwater fleet is one of the newest in the industry, and our premium jackup fleet is the largest of any offshore drilling company.

Our customers include many of the leading national and international oil companies, in addition to many independent operators. We are among the most geographically diverse offshore drilling companies, with current operations and drilling contracts spanning approximately 20 countries on six continents in nearly every major offshore basin around the world. The markets in which we operate include the U.S. Gulf of Mexico, Mexico, Brazil, the Mediterranean, the North Sea, the Middle East, West Africa, Australia and Southeast Asia.

We provide drilling services on a "day rate" contract basis. Under day rate contracts, we provide a drilling rig and rig crews and receive a fixed amount per day for each day we are performing drilling or related services. Our customers bear substantially all of the ancillary costs of constructing the well and supporting drilling operations, as well as the economic risk relative to the success of the well. In addition, our customers may pay all or a portion of the cost of moving our equipment and personnel to and from the well site. We do not provide "turnkey" or other risk-based drilling services.

Redomestication

During 2009, we completed a reorganization of the corporate structure of the group of companies controlled by our predecessor, ENSCO International Incorporated ("Ensco Delaware"), pursuant to which an indirect, wholly-owned subsidiary merged with Ensco Delaware, and Ensco plc became our publicly-held parent company incorporated under English law (the "redomestication").

We remain subject to the U.S. Securities and Exchange Commission (the "SEC") reporting requirements, the mandates of the Sarbanes-Oxley Act of 2002, as amended, and the applicable corporate governance rules of the New York Stock Exchange ("NYSE"), and we will continue to report our consolidated financial results in U.S. dollars and in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"). We also must comply with additional reporting requirements of English law.

Basis of Presentation—U.K. Companies Act 2006 Section 435 Statement

The accompanying consolidated financial statements have been prepared in accordance with U.S. GAAP, which the Board of Directors consider to be the most meaningful presentation of our results of operations and financial position.  The accompanying consolidated financial statements do not constitute statutory accounts required by the U.K. Companies Act 2006, which for the year ended December 31, 2014 will be prepared in accordance with generally accepted accounting principles in the U.K. and delivered to the Registrar of Companies in the U.K. following the annual general meeting of shareholders.  The U.K. statutory accounts are expected to include an unqualified auditor’s report, which is not expected to contain any references to matters on which the auditors drew attention by way of emphasis without qualifying the report or any statements under Sections 498(2) or 498(3) of the U.K. Companies Act 2006.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Ensco plc and its majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Certain previously reported amounts have been reclassified to conform to the current year presentation.

Pervasiveness of Estimates

The preparation of financial statements in conformity with U.S. GAAP 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.

Foreign Currency Remeasurement and Translation

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 ("foreign currencies"). These transactions are remeasured in U.S. dollars based on a combination of both current and historical exchange rates. Most transaction gains and losses, including certain gains and losses on our derivative instruments, are included in other, net, in our consolidated statement of operations.  Certain gains and losses from the translation of foreign currency balances of our non-U.S. dollar functional currency subsidiaries are included in accumulated other comprehensive income on our consolidated balance sheet.  Net foreign currency exchange gains and losses, inclusive of offsetting fair value derivatives, were $2.6 million of losses, $6.4 million of gains and $3.5 million of losses, and were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.

Cash Equivalents and Short-Term Investments

Highly liquid investments with maturities of three months or less at the date of purchase are considered cash equivalents. Highly liquid investments with maturities of greater than three months but less than one year at the date of purchase are classified as short-term investments.

Short-term investments, consisting of time deposits with initial maturities in excess of three months but less than one year, were included in other current assets on our consolidated balance sheets and totaled $757.3 million and $50.0 million as of December 31, 2014 and 2013, respectively. Cash flows from purchases and maturities of short-term investments were classified as investing activities in our consolidated statements of cash flows for the years ended December 31, 2014, 2013 and 2012.

Property and Equipment

All costs incurred in connection with the acquisition, construction, major enhancement and improvement of assets are capitalized, including allocations of interest incurred during periods that our drilling rigs are under construction or undergoing major enhancements and improvements. Repair and maintenance costs are charged to contract drilling expense in the period in which they are incurred. Upon sale or retirement of assets, the related cost and accumulated depreciation are removed from the balance sheet, and the resulting gain or loss is included in contract drilling expense, unless reclassified to discontinued operations.

Our property and equipment is depreciated on a straight-line basis, after allowing for salvage values, over the estimated useful lives of our assets. Drilling rigs and related equipment are depreciated over estimated useful lives ranging from four to 35 years.  Buildings and improvements are depreciated over estimated useful lives ranging from two to 30 years. Other equipment, including computer and communications hardware and software costs, is depreciated over estimated useful lives ranging from two to six years.

We evaluate the carrying value of our property and equipment for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. 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. Property and equipment held for sale is recorded at the lower of net book value or net realizable value.

During 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2.5 billion. See "Note 3 - Property and Equipment" for additional information on these impairments.

If the global economy deteriorates and/or our expectation relative to future offshore drilling industry conditions decline, it is reasonably possible that additional impairment charges may occur with respect to specific individual rigs, groups of rigs, such as a specific type of drilling rig, or rigs in a certain geographic location.

Goodwill

Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

We test goodwill for impairment on an annual basis as of December 31 of each year 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.

If we conclude that the fair value of one or both of our reporting units has more-likely-than-not declined below its carrying amount after qualitatively assessing existing facts and circumstances, we perform a quantitative assessment whereby we estimate the fair value of each reporting unit.  In most instances, our calculation of the fair value of our reporting units is based on estimates of future discounted cash flows to be generated by the drilling rigs in the reporting unit.

Based on a qualitative assessment performed as of December 31, 2014, we concluded it was more-likely-than-not that the fair value of our Floater reporting unit was less than its carrying amount and performed a quantitative assessment. As a result, we concluded that our Floater reporting unit goodwill balance was impaired. See "Note 8 - Goodwill and Other Intangible Assets and Liabilities" for additional information on our goodwill.

We concluded the fair value of our Jackup reporting more-likely-than-not exceeded its carrying amount, and there was no impairment of goodwill.

Operating Revenues and Expenses

Substantially all of our drilling contracts ("contracts") are performed on a day rate basis, and the terms of such contracts are typically for a specific period of time or the period of time required to complete a specific task, such as drill a well. Contract revenues and expenses are recognized on a per day basis, as the work is performed. Day rate revenues are typically earned, and contract drilling expense is typically incurred, on a uniform basis over the terms of our contracts.

In connection with some contracts, we receive lump-sum fees or similar compensation for the mobilization of equipment and personnel prior to the commencement of drilling services or the demobilization of equipment and personnel upon contract completion. Fees received for the mobilization or demobilization of equipment and personnel are included in operating revenues. The costs incurred in connection with the mobilization and demobilization of equipment and personnel are included in contract drilling expense.

Mobilization fees received and costs incurred prior to commencement of drilling operations are deferred and recognized on a straight-line basis over the period that the related drilling services are performed. Demobilization fees and related costs are recognized as incurred upon contract completion. Costs associated with the mobilization of equipment and personnel to more promising market areas without contracts are expensed as incurred.

Deferred mobilization costs were included in other current assets and other assets, net, on our consolidated balance sheets and totaled $95.7 million and $66.6 million as of December 31, 2014 and 2013, respectively. Deferred mobilization revenue was included in accrued liabilities and other, and other liabilities on our consolidated balance sheets and totaled $149.4 million and $76.8 million as of December 31, 2014 and 2013, respectively.

In connection with some contracts, we receive up-front lump-sum fees or similar compensation for capital improvements to our drilling rigs. Such compensation is deferred and recognized as revenue over the period that the related drilling services are performed. The cost of such capital improvements is capitalized and depreciated over the useful life of the asset. Deferred revenue associated with capital improvements was included in accrued liabilities and other, and other liabilities on our consolidated balance sheets and totaled $428.9 million and $273.6 million as of December 31, 2014 and 2013, respectively.

We must obtain certifications from various regulatory bodies in order to operate our drilling rigs and must maintain such certifications through periodic inspections and surveys. The costs incurred in connection with maintaining such certifications, including inspections, tests, surveys and drydock, as well as remedial structural work and other compliance costs, are deferred and amortized over the corresponding certification periods. Deferred regulatory certification and compliance costs were included in other current assets and other assets, net, on our consolidated balance sheets and totaled $20.0 million and $18.3 million as of December 31, 2014 and 2013, respectively.

In certain countries in which we operate, taxes such as sales, use, value-added, gross receipts and excise may be assessed by the local government on our revenues. We generally record our tax-assessed revenue transactions on a net basis in our consolidated statement of operations.

Derivative Instruments

We use derivatives to reduce our exposure to various market risks, primarily foreign currency exchange rate risk. See "Note 5 - Derivative Instruments" for additional information on how and why we use derivatives.

All derivatives are recorded on our consolidated balance sheet at fair value. Derivatives subject to legally enforceable master netting agreements are not offset on our consolidated balance sheet. 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. Derivatives qualify for hedge accounting when they are formally designated as hedges and are effective in reducing the risk exposure that they are designated to hedge. Our assessment of hedge effectiveness is formally documented at hedge inception, and we review hedge effectiveness and measure any ineffectiveness throughout the designated hedge period on at least a quarterly basis.

Changes in the fair value of derivatives that are designated as hedges of the variability in expected future cash flows associated with existing recognized assets or liabilities or forecasted transactions ("cash flow hedges") are recorded in accumulated other comprehensive income ("AOCI").  Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transactions.

Gains and losses on a cash flow hedge, or a portion of a cash flow hedge, that no longer qualifies as effective due to an unanticipated change in the forecasted transaction are recognized currently in earnings and included in other, net, in our consolidated statement of operations based on the change in the fair value of the derivative. When a forecasted transaction is probable of not occurring, gains and losses on the derivative previously recorded in AOCI are reclassified currently into earnings and included in other, net, in our consolidated statement of operations.

We occasionally enter into derivatives that hedge the fair value of recognized assets or liabilities, but do not designate such derivatives as hedges or the derivatives otherwise do not qualify for hedge accounting. In these situations, there generally is a natural hedging relationship where changes in the fair value of the derivatives offset changes in the fair value of the underlying hedged items. Changes in the fair value of these derivatives are recognized currently in earnings in other, net, in our consolidated statement of operations.

Derivatives with asset fair values are reported in other current assets or other assets, net, on our consolidated balance sheet depending on maturity date. Derivatives with liability fair values are reported in accrued liabilities and other, or other liabilities on our consolidated balance sheet depending on maturity date.

Income Taxes

We conduct operations and earn income in numerous countries. Current income taxes are recognized for the amount of taxes payable or refundable based on the laws and income tax rates in the taxing jurisdictions in which operations are conducted and income is earned.

Deferred tax assets and liabilities are recognized for the anticipated future tax effects of temporary differences between the financial statement basis and the tax basis of our assets and liabilities using the enacted tax rates in effect at year-end. A valuation allowance for deferred tax assets is recorded when it is more-likely-than-not that the benefit from the deferred tax asset will not be realized. We do not offset deferred tax assets and deferred tax liabilities attributable to different tax paying jurisdictions.

We operate in certain jurisdictions where tax laws relating to the offshore drilling industry are not well developed and change frequently. Furthermore, we may enter into transactions with affiliates or employ other tax planning strategies that generally are subject to complex tax regulations. As a result of the foregoing, the tax liabilities and assets we recognize in our financial statements may differ from the tax positions taken, or expected to be taken, in our tax returns. Our tax positions are evaluated for recognition using a more-likely-than-not threshold, and those tax positions requiring recognition are measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon effective settlement with a taxing authority that has full knowledge of all relevant information. Interest and penalties relating to income taxes are included in current income tax expense in our consolidated statement of operations.

Our drilling rigs frequently move from one taxing jurisdiction to another based on where they are contracted to perform drilling services. The movement of drilling rigs among taxing jurisdictions may involve a transfer of drilling rig ownership among our subsidiaries (“intercompany rig sale”). The pre-tax profit resulting from an intercompany rig sale is eliminated from our consolidated financial statements, and the carrying value of a rig sold in an intercompany transaction remains at historical net depreciated cost prior to the transaction. Our consolidated financial statements do not reflect the asset disposition transaction of the selling subsidiary or the asset acquisition transaction of the acquiring subsidiary. Income taxes resulting from an intercompany rig sale, as well as the tax effect of any reversing temporary differences resulting from the sale, are deferred and amortized on a straight-line basis over the remaining useful life of the rig.

In some instances, we may determine that certain temporary differences will not result in a taxable or deductible amount in future years, as it is more-likely-than-not we will commence operations and depart from a given taxing jurisdiction without such temporary differences being recovered or settled. Under these circumstances, no future tax consequences are expected and no deferred taxes are recognized in connection with such operations. We evaluate these determinations on a periodic basis and, in the event our expectations relative to future tax consequences change, the applicable deferred taxes are recognized or derecognized.

We do not provide deferred taxes on the undistributed earnings of certain subsidiaries because our policy and intention is to reinvest such earnings indefinitely. See "Note 9 - Income Taxes" for additional information on our deferred taxes, unrecognized tax benefits, intercompany transfers of drilling rigs and undistributed earnings.

Share-Based Compensation

We sponsor share-based compensation plans that provide equity compensation to our key employees, officers and non-employee directors. Share-based compensation cost is measured at fair value on the date of grant and recognized on a straight-line basis over the requisite service period (usually the vesting period). The amount of compensation cost recognized in our consolidated statement of operations is based on the awards ultimately expected to vest and, therefore, reduced for estimated forfeitures. All changes in estimated forfeitures are based on historical experience and are recognized as a cumulative adjustment to compensation cost in the period in which they occur. See "Note 7 - Benefit Plans" for additional information on our share-based compensation.

Fair Value Measurements

We measure certain of our assets and liabilities based on a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy assigns the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities ("Level 1") and the lowest priority to unobservable inputs ("Level 3").  Level 2 measurements represent inputs that are observable for similar assets or liabilities, either directly or indirectly, other than quoted prices included within Level 1.  See "Note 2 - Fair Value Measurements" for additional information on the fair value measurement of certain of our assets and liabilities.

Earnings Per Share

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

The following table is a reconciliation of (loss) income from continuing operations attributable to Ensco shares used in our basic and diluted EPS computations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
(Loss) income from continuing operations attributable to Ensco	$	(2,703.1	)	$	1,421.6		$	1,069.6
Income from continuing operations allocated to non-vested share awards	(7.9		)	(15.1		)	(11.2		)
(Loss) income from continuing operations attributable to Ensco shares	$	(2,711.0	)	$	1,406.5		$	1,058.4

The following table is a reconciliation of the weighted-average shares used in our basic and diluted earnings per share computations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014	2013	2012
Weighted-average shares - basic	231.6	230.9	229.4
Potentially dilutive shares	—	.2	.3
Weighted-average shares - diluted	231.6	231.1	229.7

Antidilutive share options totaling 400,000, 300,000 and 400,000 for the years ended December 31, 2014, 2013 and 2012, respectively, were excluded from the computation of diluted EPS.

Noncontrolling Interests

Third parties hold a noncontrolling ownership interest in certain of our non-U.S. subsidiaries. Noncontrolling interests are classified as equity on our consolidated balance sheet and net income attributable to noncontrolling interests is presented separately in our consolidated statement of operations. 

(Loss) income from continuing operations attributable to Ensco for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
(Loss) income from continuing operations	$	(2,689.3	)	$	1,430.1		$	1,076.1
Income from continuing operations attributable to noncontrolling interests	(13.8		)	(8.5		)	(6.5		)
(Loss) income from continuing operations attributable to Ensco	$	(2,703.1	)	$	1,421.6		$	1,069.6

(Loss) income from discontinued operations attributable to Ensco for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
(Loss) income from discontinued operations	$	(1,199.2	)	$	(2.2	)	$	100.6
Income from discontinued operations attributable to noncontrolling interests	(.3		)	(1.2		)	(.5		)
(Loss) income from discontinued operations attributable to Ensco	$	(1,199.5	)	$	(3.4	)	$	100.1

New Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) ("Update 2014-09"), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective on January 1, 2017. Early application is not permitted. We are currently evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures.

Noncontrolling Interest Disclosure [Text Block]

Noncontrolling Interests

Third parties hold a noncontrolling ownership interest in certain of our non-U.S. subsidiaries. Noncontrolling interests are classified as equity on our consolidated balance sheet and net income attributable to noncontrolling interests is presented separately in our consolidated statement of operations. 

(Loss) income from continuing operations attributable to Ensco for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
(Loss) income from continuing operations	$	(2,689.3	)	$	1,430.1		$	1,076.1
Income from continuing operations attributable to noncontrolling interests	(13.8		)	(8.5		)	(6.5		)
(Loss) income from continuing operations attributable to Ensco	$	(2,703.1	)	$	1,421.6		$	1,069.6

(Loss) income from discontinued operations attributable to Ensco for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
(Loss) income from discontinued operations	$	(1,199.2	)	$	(2.2	)	$	100.6
Income from discontinued operations attributable to noncontrolling interests	(.3		)	(1.2		)	(.5		)
(Loss) income from discontinued operations attributable to Ensco	$	(1,199.5	)	$	(3.4	)	$	100.1

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Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
NET INCOME	$ (3,448.5)	$ 432.9	$ (1,169.6)	$ 296.7	$ 364.0	$ 381.4	$ 362.6	$ 319.9	$ (3,888.5)	$ 1,427.9	$ 1,176.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives									(11.7)	(5.8)	8.7
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income									(0.9)	2.0	0
Other									6.3	1.9	2.8
NET OTHER COMPREHENSIVE INCOME (LOSS)									(6.3)	(1.9)	11.5
COMPREHENSIVE INCOME									(3,894.8)	1,426.0	1,188.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									(14.1)	(9.7)	(7.0)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO									$ (3,908.9)	$ 1,416.3	$ 1,181.2

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Commitments And Contingencies

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments And Contingencies

COMMITMENTS AND CONTINGENCIES

Leases

We are obligated under leases for certain of our offices and equipment.  Rental expense relating to operating leases was $54.4 million, $49.1 million and $46.9 million during the years ended December 31, 2014, 2013 and 2012, respectively. Future minimum rental payments under our noncancellable operating lease obligations are as follows:  $77.3 million during 2015; $31.8 million during 2016; $16.2 million during 2017; $10.6 million during 2018; $10.2 million during 2019 and $55.0 million thereafter.

Capital Commitments

The following table summarizes the cumulative amount of contractual payments made as of December 31, 2014 for our rigs under construction and estimated timing of our remaining contractual payments (in millions): 

	Cumulative Paid(1)		2015		2016		2017		Total(2)
ENSCO DS-8	161.4		384.4		—		—		545.8
ENSCO DS-9	157.4		375.0		—		—		532.4
ENSCO DS-10	206.0		310.3		—		—		516.3
ENSCO 110	41.0		166.2		—		—		207.2
ENSCO 123	53.5		—		217.0		—		270.5
ENSCO 140	78.4		78.9		39.2		—		196.5
ENSCO 141	39.2		38.7		117.6		—		195.5
	$	736.9	$	1,353.5	$	373.8	$	—	$	2,464.2

⁽¹⁾ Cumulative paid represents the aggregate amount of contractual payments made from commencement of the construction agreement through December 31, 2014.

⁽²⁾ Total commitments are based on fixed-price shipyard construction contracts, exclusive of costs associated with commissioning, systems integration testing, project management and capitalized interest.

Future contractual payments for rig enhancement projects, which are not reflected in the table above, are $42.8 million. We currently estimate these payments will be made during 2015.     

The timing of these expenditures may vary based on the completion of various construction milestones, which are, to a large extent, beyond our control.

ENSCO 29 Wreck Removal

During 2005, a portion of the ENSCO 29 platform drilling rig was lost over the side of a customer's platform as a result of Hurricane Katrina. In June 2014, we received a letter from an operator demanding that Ensco retrieve the derrick and drawworks from the seabed.

Our property insurance policies include coverage for the ENSCO 29 wreckage and debris removal costs up to $3.8 million. We also maintain liability insurance policies that provide coverage under certain circumstances for wreckage and debris removal costs in excess of the $3.8 million coverage provided under the property insurance policies. We believe that it is not probable a liability exists with respect to this matter, and no liability has been recorded on our consolidated balance sheet as of December 31, 2014. While we cannot reasonably estimate a range of possible loss at this time, it is possible that removal costs may be in excess of our insurance coverage. Although we do not expect costs associated with the ENSCO 29 wreck removal 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.

ENSCO 74 Loss

During 2008, ENSCO 74 was lost as a result of Hurricane Ike in the U.S. Gulf of Mexico.  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 during 2009.  Wreck removal operations on the sunken rig hull of ENSCO 74 were completed during 2010.

We filed a petition for exoneration or limitation of liability under U.S. admiralty and maritime law during 2009. A number of claimants presented claims in the exoneration/limitation proceedings. We have liability insurance policies that provide coverage for such 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 deductible for third-party claims and an annual aggregate limit of $490.0 million. 

The owner of a pipeline filed claims alleging that ENSCO 74 caused the pipeline to rupture during Hurricane Ike and sought damages for the cost of repairs and business interruption in an amount in excess of $26.0 million. During 2014, we reached an agreement with the owner of the pipeline to settle the claims for $9.6 million. Prior to the settlement we incurred legal fees of $3.6 million for this matter. During 2014, we paid the remaining $6.4 million of our deductible under our liability insurance policy, which was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2013. The remaining $3.2 million was paid by our underwriters under the terms of the related insurance policies.

The owner of the oil tanker that struck the hull of ENSCO 74 filed claims seeking monetary damages currently in excess of $5.0 million for losses incurred when the tanker struck the sunken hull of ENSCO 74. This matter went to trial in June 2014, and the Company won a directed verdict on all claims. The plaintiff has the right to appeal the decision. We believe that it is not probable that a liability exists with respect to these claims.

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 Illinois, Mississippi, Texas, Louisiana and the UK by approximately 125 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.

During 2013, we reached an agreement in principle with 58 of the plaintiffs to settle lawsuits filed in Mississippi for a nominal amount. A special master reviewed all 58 cases and made an allocation of settlement funds among the parties.  The District Court Judge reviewed the allocations and accepted the special master’s recommendations and approved the settlements.  The settlement documents and final documentation for the individual plaintiffs are being processed.

We intend to vigorously defend against the remaining 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 Illinois, Mississippi, Texas, Louisiana and the UK, we have other asbestos or lung injury claims pending against us in litigation in other jurisdictions. Although we do not expect 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.

  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.

In the ordinary course of business with customers and others, we have entered into letters of credit to guarantee our performance as it relates to our drilling contracts, contract bidding, customs duties, tax appeals and other obligations in various jurisdictions. Letters of credit outstanding as of December 31, 2014 totaled $263.9 million and are issued under facilities provided by various banks and other financial institutions. Obligations under these letters of credit are not normally called, as we typically comply with the underlying performance requirement. As of December 31, 2014, we had not been required to make collateral deposits with respect to these agreements.

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Guarantee Of Registered Securities (Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			32 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	$ 2,057.9	$ 1,811.2	$ 1,954.6
INVESTING ACTIVITIES
Additions to property and equipment	(1,568.8)	(1,763.5)	(1,713.2)
Purchases of short-term investments	(790.6)	(50.0)	(90.0)
Maturities of short-term investments	83.3	50.0	44.5
Proceeds from Sale of Property, Plant, and Equipment	169.2	6.0	3.2
Net cash used in investing activities of continuing operations	(2,106.9)	(1,757.5)	(1,755.5)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	1,246.4	0	0
Cash dividends paid	(703.0)	(525.6)	(348.1)
Commercial paper borrowings, net	0	0	(125.0)
Equity financing costs	0	0	66.7
Reduction of long-term borrowings	(60.1)	(47.5)	(47.5)
Proceeds from exercise of share options	2.6	22.3	35.8
Debt financing costs	(13.4)	(4.6)	0
Advances (to) from affiliates	0	0	0
Other	(29.8)	(21.7)	(17.4)
Net cash (used in) provided by financing activities of continuing operations	442.7	(577.1)	(435.5)
DISCONTINUED OPERATIONS
Operating activities	(3.8)	169.3	232.5
Investing activities	109.3	32.8	58.3
Net cash provided by discontinued operations	105.5	202.1	290.8	311.1	[1]
Effect of exchange rate changes on cash and cash equivalents	0	(0.2)	2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	499.2	(321.5)	56.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	165.6	487.1	430.7
CASH AND CASH EQUIVALENTS, END OF YEAR	664.8	165.6	487.1	664.8
Ensco Plc [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(63.8)	(114.8)	(71.6)
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	(716.1)	0	0
Maturities of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	(0.3)
Net cash used in investing activities of continuing operations	(716.1)	0	(0.3)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	1,246.4
Cash dividends paid	(703.0)	(525.6)	(348.1)
Commercial paper borrowings, net			(125.0)
Equity financing costs			66.7
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	2.6	22.3	23.9
Debt financing costs	(13.4)	0
Advances (to) from affiliates	501.9	407.2	501.2
Other	(13.7)	(14.4)	(11.6)
Net cash (used in) provided by financing activities of continuing operations	1,020.8	(110.5)	107.1
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net cash provided by discontinued operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	240.9	(225.3)	35.2
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	46.5	271.8	236.6
CASH AND CASH EQUIVALENTS, END OF YEAR	287.4	46.5	271.8	287.4
ENSCO International Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(167.6)	(128.7)	(38.2)
INVESTING ACTIVITIES
Additions to property and equipment	(37.2)	0	0
Purchases of short-term investments	0	0	0
Maturities of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	(4.1)	0.4
Net cash used in investing activities of continuing operations	(37.2)	(4.1)	0.4
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	0
Cash dividends paid	0	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	11.9
Debt financing costs	0	(4.6)
Advances (to) from affiliates	204.3	136.2	27.6
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	204.3	131.6	39.5
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net cash provided by discontinued operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(0.5)	(1.2)	1.7
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	0.5	1.7	0
CASH AND CASH EQUIVALENTS, END OF YEAR	0	0.5	1.7	0
Pride International Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(90.9)	(62.9)	(21.6)
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	0	0	0
Maturities of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	0
Net cash used in investing activities of continuing operations	0	0	0
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	0
Cash dividends paid	0	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Advances (to) from affiliates	176.8	(17.2)	84.0
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	176.8	(17.2)	84.0
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net cash provided by discontinued operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	85.9	(80.1)	62.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4.9	85.0	22.6
CASH AND CASH EQUIVALENTS, END OF YEAR	90.8	4.9	85.0	90.8
Other Non-Guarantor Subsidiaries Of Ensco [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	2,380.2	2,117.6	2,086.0
INVESTING ACTIVITIES
Additions to property and equipment	(1,531.6)	(1,763.5)	(1,713.2)
Purchases of short-term investments	(74.5)	(50.0)	(90.0)
Maturities of short-term investments	83.3	50.0	44.5
Proceeds from Sale of Property, Plant, and Equipment	169.2	10.1	3.1
Net cash used in investing activities of continuing operations	(1,353.6)	(1,753.4)	(1,755.6)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	0
Cash dividends paid	0	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Reduction of long-term borrowings	(60.1)	(47.5)	(47.5)
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Advances (to) from affiliates	(883.0)	(526.2)	(612.8)
Other	(16.1)	(7.3)	(5.8)
Net cash (used in) provided by financing activities of continuing operations	(959.2)	(581.0)	(666.1)
DISCONTINUED OPERATIONS
Operating activities	(3.8)	169.3	232.5
Investing activities	109.3	32.8	58.3
Net cash provided by discontinued operations	105.5	202.1	290.8
Effect of exchange rate changes on cash and cash equivalents	0	(0.2)	2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	172.9	(14.9)	(42.9)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	113.7	128.6	171.5
CASH AND CASH EQUIVALENTS, END OF YEAR	286.6	113.7	128.6	286.6
Consolidating Adjustments [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	0	0	0
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	0	0	0
Maturities of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	0
Net cash used in investing activities of continuing operations	0	0	0
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	0
Cash dividends paid	0	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Advances (to) from affiliates	0	0	0
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	0	0	0
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net cash provided by discontinued operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	0	0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	0	0	0
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 0	$ 0	$ 0	$ 0

[1] The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and were previously included within the operating segment noted in the above table.

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Guarantee Of Registered Securities (Condensed Consolidating Statements Of Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Guarantor Obligations [Line Items]
NET INCOME	$ (3,448.5)	$ 432.9	$ (1,169.6)	$ 296.7	$ 364.0	$ 381.4	$ 362.6	$ 319.9	$ (3,888.5)	$ 1,427.9	$ 1,176.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives									(11.7)	(5.8)	8.7
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income									(0.9)	2.0	0
Other									6.3	1.9	2.8
NET OTHER COMPREHENSIVE INCOME (LOSS)									(6.3)	(1.9)	11.5
COMPREHENSIVE INCOME									(3,894.8)	1,426.0	1,188.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									(14.1)	(9.7)	(7.0)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO									(3,908.9)	1,416.3	1,181.2
Ensco Plc [Member]
Guarantor Obligations [Line Items]
NET INCOME									(3,902.6)	1,418.2	1,169.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives									0	0	0
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income									0	0	0
Other									0	0	0
NET OTHER COMPREHENSIVE INCOME (LOSS)									0	0	0
COMPREHENSIVE INCOME									(3,902.6)	1,418.2	1,169.7
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									0	0	0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO									(3,902.6)	1,418.2	1,169.7
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
NET INCOME									(3,657.4)	259.8	256.2
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives									(11.7)	(5.8)	6.3
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income									(0.9)	2.0	0.2
Other									0	0	0
NET OTHER COMPREHENSIVE INCOME (LOSS)									(12.6)	(3.8)	6.5
COMPREHENSIVE INCOME									(3,670.0)	256.0	262.7
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									0	0	0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO									(3,670.0)	256.0	262.7
Pride International Inc. [Member]
Guarantor Obligations [Line Items]
NET INCOME									(3,799.0)	83.7	189.2
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives									0	0	0
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income									0	0	0
Other									0	0	0
NET OTHER COMPREHENSIVE INCOME (LOSS)									0	0	0
COMPREHENSIVE INCOME									(3,799.0)	83.7	189.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									0	0	0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO									(3,799.0)	83.7	189.2
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
NET INCOME									(3,710.9)	1,684.1	1,419.6
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives									0	0	2.4
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income									0	0	(0.2)
Other									6.3	1.9	2.8
NET OTHER COMPREHENSIVE INCOME (LOSS)									6.3	1.9	5.0
COMPREHENSIVE INCOME									(3,704.6)	1,686.0	1,424.6
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									(14.1)	(9.7)	(7.0)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO									(3,718.7)	1,676.3	1,417.6
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
NET INCOME									11,181.4	(2,017.9)	(1,858.0)
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives									0	0	0
Reclassification of gains and losses on derivative instruments from other comprehensive (income) loss into net income									0	0	0
Other									0	0	0
NET OTHER COMPREHENSIVE INCOME (LOSS)									0	0	0
COMPREHENSIVE INCOME									11,181.4	(2,017.9)	(1,858.0)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									0	0	0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO									$ 11,181.4	$ (2,017.9)	$ (1,858.0)

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Document And Entity Information (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Feb. 24, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2014
Entity Registrant Name	Ensco plc
Entity Central Index Key	0000314808
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 11,554,518
Entity Common Shares, Shares Outstanding		234,172,524

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Sale Leaseback (Notes)

12 Months Ended

Dec. 31, 2014

Sale Leaseback [Abstract]

Sale Leaseback Transaction Disclosure [Text Block]

SALE-LEASEBACK

In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which were contracted to Pemex. We received proceeds of $211.8 million and incurred commissions and other incremental, direct costs of $5.3 million. The carrying value of these rigs was $169.6 million.

In connection with this sale, we executed charter agreements with the purchaser to continue operating the rigs for the remainder of the Pemex contracts, which have anticipated completion dates in either late 2015 or 2016. We accounted for the transaction as a sale-leaseback, whereby we will retain a significant portion of the remaining use of the rigs as a result of the charter agreements.

We recorded an aggregate gain on sale of $7.5 million at the time of disposal, which represented the portion of the gain that exceeded the present value of payments due under the charter agreements, and was included in contract drilling expense in our consolidated statement of operations for the year ended December 31, 2014. The remaining $29.4 million gain was deferred and amortized to contract drilling expense within the Jackup segment over the remaining charter term of each rig. Of the $29.4 million deferred gain, $7.0 million was recognized in contract drilling expense in our consolidated statement of operations for the year ended December 31, 2014 and $22.4 million was included in accrued liabilities and other on our consolidated balance sheet as of December 31, 2014.

Due to our charter agreements with the purchaser, we expect to have significant continuing involvement and cash flows related to ENSCO 83, ENSCO 89 and ENSCO 98; therefore, the operating results for these rigs were included in income from continuing operations within the Jackup segment for periods prior to the date of sale (September 30, 2014). Operating results for periods beginning after September 30, 2014 were included in income from continuing operations within the Other segment. The proceeds from the sale of these rigs were included in investing activities of continuing operations in our consolidated statement of cash flows for the year ended December 31, 2014.

At the time of sale, we expected to also have significant continuing involvement and cash flows related to ENSCO 93; therefore, the operating results for the rig were included in income from continuing operations within the Jackup segment at September 30, 2014. Based on market developments during the fourth quarter, we now expect that the ENSCO 93 charter agreement will terminate prior to September 30, 2015. As a result, the loss on sale of $1.2 million and ENSCO 93 operating results were reclassified to (loss) income from discontinued operations, net in our consolidated statements of operations for the three-year period December 31, 2014. The proceeds from the sale were included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2014. See "Note 10 - Discontinued Operations" for additional information.

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Supplemental Financial Information (Accounts Receivable, Net) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	$ 894.7	$ 884.1
Allowance for doubtful accounts	(11.4)	(28.4)
Accounts receivable, net	883.3	855.7
Trade [Member]
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	878.8	869.8
Other Credit Derivatives [Member]
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	$ 15.9	$ 14.3

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Guarantee Of Registered Securities (Condensed Consolidating Statements Of Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Guarantor Obligations [Line Items]
OPERATING REVENUES	$ 1,159.8	$ 1,201.4	$ 1,136.6	$ 1,066.7	$ 1,138.0	$ 1,119.9	$ 1,076.1	$ 989.4	$ 4,564.5	$ 4,323.4	$ 3,638.8
Contract drilling (exclusive of depreciation)	514.0	500.2	542.5	520.2	500.4	499.2	496.1	451.4	2,076.9	1,947.1	1,642.8
Asset Impairment Charges	3,515.2	0	703.5	0					4,218.7	0	0
Depreciation	139.4	135.2	132.2	131.1	127.5	124.7	124.0	120.0	537.9	496.2	443.8
General and administrative	28.3	29.3	36.2	38.1	35.2	37.4	36.4	37.8	131.9	146.8	148.9
OPERATING INCOME	(3,037.1)	536.7	(277.8)	377.3	474.9	458.6	419.6	380.2	(2,400.9)	1,733.3	1,403.3
OTHER (EXPENSE) INCOME, NET	(49.6)	(38.4)	(30.8)	(29.1)	(28.9)	(1.6)	(39.8)	(29.8)	(147.9)	(100.1)	(98.6)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(3,086.7)	498.3	(308.6)	348.2	446.0	457.0	379.8	350.4	(2,548.8)	1,633.2	1,304.7
Total provision for income taxes	(26.2)	74.6	42.6	49.5	44.6	67.5	43.2	47.8	140.5	203.1	228.6
DISCONTINUED OPERATIONS, NET	(388.0)	9.2	(818.4)	(2.0)	(37.4)	(8.1)	26.0	17.3	(1,199.2)	(2.2)	100.6
EQUITY EARNINGS IN AFFILIATES, NET OF TAX									0	0	0
NET INCOME	(3,448.5)	432.9	(1,169.6)	296.7	364.0	381.4	362.6	319.9	(3,888.5)	1,427.9	1,176.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(3.3)	(3.5)	(3.1)	(4.2)	(2.6)	(2.6)	(1.7)	(2.8)	(14.1)	(9.7)	(7.0)
NET INCOME ATTRIBUTABLE TO ENSCO	(3,451.8)	429.4	(1,172.7)	292.5	361.4	378.8	360.9	317.1	(3,902.6)	1,418.2	1,169.7
Ensco Plc [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES									34.5	35.0	44.0
Contract drilling (exclusive of depreciation)									31.8	27.5	51.2
Asset Impairment Charges									0
Depreciation									0.2	0.3	0.4
General and administrative									52.0	63.5	63.8
OPERATING INCOME									(49.5)	(56.3)	(71.4)
OTHER (EXPENSE) INCOME, NET									(67.0)	(65.6)	(41.8)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									(116.5)	(121.9)	(113.2)
Total provision for income taxes									0	0	0
DISCONTINUED OPERATIONS, NET									0	0	0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX									(3,786.1)	1,540.1	1,282.9
NET INCOME									(3,902.6)	1,418.2	1,169.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									0	0	0
NET INCOME ATTRIBUTABLE TO ENSCO									(3,902.6)	1,418.2	1,169.7
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES									145.4	149.4	147.6
Contract drilling (exclusive of depreciation)									145.4	149.4	147.6
Asset Impairment Charges									0
Depreciation									7.6	4.0	3.5
General and administrative									0.4	0.5	0.4
OPERATING INCOME									(8.0)	(4.5)	(3.9)
OTHER (EXPENSE) INCOME, NET									(43.3)	(9.4)	(7.0)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									(51.3)	(13.9)	(10.9)
Total provision for income taxes									(44.9)	92.5	68.8
DISCONTINUED OPERATIONS, NET									0	0	0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX									(3,651.0)	366.2	335.9
NET INCOME									(3,657.4)	259.8	256.2
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									0	0	0
NET INCOME ATTRIBUTABLE TO ENSCO									(3,657.4)	259.8	256.2
Pride International Inc. [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES									0	0	0
Contract drilling (exclusive of depreciation)									0	0	0
Asset Impairment Charges									0
Depreciation									0	0	0
General and administrative									0	0	0
OPERATING INCOME									0	0	0
OTHER (EXPENSE) INCOME, NET									(54.7)	(27.9)	(50.0)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									(54.7)	(27.9)	(50.0)
Total provision for income taxes									0	0	0
DISCONTINUED OPERATIONS, NET									0	0	0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX									(3,744.3)	111.6	239.2
NET INCOME									(3,799.0)	83.7	189.2
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									0	0	0
NET INCOME ATTRIBUTABLE TO ENSCO									(3,799.0)	83.7	189.2
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES									4,683.0	4,446.4	3,767.3
Contract drilling (exclusive of depreciation)									2,198.1	2,077.6	1,764.1
Asset Impairment Charges									4,218.7
Depreciation									530.1	491.9	439.9
General and administrative									79.5	82.8	84.7
OPERATING INCOME									(2,343.4)	1,794.1	1,478.6
OTHER (EXPENSE) INCOME, NET									17.1	2.8	0.2
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									(2,326.3)	1,796.9	1,478.8
Total provision for income taxes									185.4	110.6	159.8
DISCONTINUED OPERATIONS, NET									(1,199.2)	(2.2)	100.6
EQUITY EARNINGS IN AFFILIATES, NET OF TAX									0	0	0
NET INCOME									(3,710.9)	1,684.1	1,419.6
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									(14.1)	(9.7)	(7.0)
NET INCOME ATTRIBUTABLE TO ENSCO									(3,725.0)	1,674.4	1,412.6
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES									(298.4)	(307.4)	(320.1)
Contract drilling (exclusive of depreciation)									(298.4)	(307.4)	(320.1)
Asset Impairment Charges									0
Depreciation									0	0	0
General and administrative									0	0	0
OPERATING INCOME									0	0	0
OTHER (EXPENSE) INCOME, NET									0	0	0
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									0	0	0
Total provision for income taxes									0	0	0
DISCONTINUED OPERATIONS, NET									0	0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX									11,181.4	(2,017.9)	(1,858.0)
NET INCOME									11,181.4	(2,017.9)	(1,858.0)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS									0	0	0
NET INCOME ATTRIBUTABLE TO ENSCO									$ 11,181.4	$ (2,017.9)	$ (1,858.0)

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Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 664,800,000	$ 165,600,000
Short-term Investments	757,300,000	50,000,000
Accounts receivable, net	883,300,000	855,700,000
Other	629,400,000	463,900,000
Total current assets	2,934,800,000	1,535,200,000
PROPERTY AND EQUIPMENT, AT COST	14,975,500,000	17,498,500,000
Less accumulated depreciation	2,440,700,000	3,187,500,000
Property and equipment, net	12,534,800,000	14,311,000,000
GOODWILL	276,100,000	3,274,000,000
OTHER ASSETS, NET	314,200,000	352,700,000
TOTAL ASSETS	16,059,900,000	19,472,900,000
CURRENT LIABILITIES
Accounts payable - trade	373,200,000	341,100,000
Accrued liabilities and other	696,600,000	658,700,000
Short-term debt	0	0
Current maturities of long-term debt	34,800,000	47,500,000
Total current liabilities	1,104,600,000	1,047,300,000
LONG-TERM DEBT	5,885,600,000	4,718,900,000
DEFERRED INCOME TAXES	179,500,000	362,100,000
OTHER LIABILITIES	667,300,000	545,700,000
ENSCO SHAREHOLDERS' EQUITY
Additional paid-in capital	5,517,500,000	5,467,200,000
Retained earnings	2,720,400,000	7,327,300,000
Accumulated other comprehensive income	11,900,000	18,200,000
Treasury shares, at cost, 6.5 million shares and 6.0 million shares	(59,000,000)	(45,200,000)
Total Ensco shareholders' equity	8,215,000,000	12,791,600,000
NONCONTROLLING INTERESTS	7,900,000	7,300,000
Total equity	8,222,900,000	12,798,900,000
Total liabilities and shareholders' equity	16,059,900,000	19,472,900,000
Class A Ordinary Shares, U.S. [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	24,100,000	24,000,000
Common Class B, Par Value In GBP [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	$ 100,000	$ 100,000

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Shareholders' Equity

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

Shareholders' Equity

SHAREHOLDERS' EQUITY

Activity in our various shareholders' equity accounts for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	Shares	Par Value		Additional Paid-in Capital			Retained Earnings			AOCI			Treasury Shares			Noncontrolling Interest
BALANCE, December 31, 2011	235.9	$	23.7	$	5,253.0		$	5,613.1		$	8.6		$	(19.1	)	$	5.2
Net income	—	—		—			1,169.7			—			—			7.0
Dividends paid	—	—		—			(348.1		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(6.5		)
Shares issued under share-based compensation plans, net	1.8	.2		35.3			—			—			(.1		)	—
Equity issuance costs	—	—		66.7			—			—			—			—
Tax deficiency from share-based compensation	—	—		(1.0		)	—			—			—			—
Repurchase of shares	—	—		—			—			—			(11.8		)	—
Share-based compensation cost	—	—		44.7			—			—			—			—
Net other comprehensive income	—	—		—			—			11.5			—			—
BALANCE, December 31, 2012	237.7	23.9		5,398.7			6,434.7			20.1			(31.0		)	5.7
Net income	—	—		—			1,418.2			—			—			9.7
Dividends paid	—	—		—			(525.6		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(8.1		)
Shares issued in connection with share-based compensation plans, net	1.9	.2		21.8			—			—			(.1		)	—
Tax benefit from share-based compensation	—	—		.1			—			—			—			—
Repurchase of shares	—	—		—			—			—			(14.1		)	—
Share-based compensation cost	—	—		46.6			—			—			—			—
Net other comprehensive loss	—	—		—			—			(1.9		)	—			—
BALANCE, December 31, 2013	239.6	24.1		5,467.2			7,327.3			18.2			(45.2		)	7.3
Net (loss) income	—	—		—			(3,902.6		)	—			—			14.1
Dividends paid	—	—		—			(704.3		)	—			—			—
Distributions to noncontrolling interests	—	—		—			—			—			—			(13.5		)
Shares issued in connection with share-based compensation plans, net	1.1	.1		.4			—			—			(.1		)	—
Tax benefit from share-based compensation	—	—		1.2			—			—			—			—
Repurchase of shares	—	—		—			—			—			(13.7		)	—
Share-based compensation cost	—	—		48.7			—			—			—			—
Net other comprehensive loss	—	—		—			—			(6.3		)	—			—
BALANCE, December 31, 2014	240.7	$	24.2	$	5,517.5		$	2,720.4		$	11.9		$	(59.0	)	$	7.9

During 2013, our shareholders approved a new share repurchase program. Subject to certain provisions under English law, including the requirement of Ensco plc to have sufficient distributable reserves, we may purchase up to a maximum of $2.0 billion in the aggregate under the program, but in no case more than 35.0 million shares. The program terminates during 2018. As of December 31, 2014, there had been no share repurchases under this program.

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Derivative Instruments

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

DERIVATIVE INSTRUMENTS

We use derivatives to reduce our exposure to various market risks, primarily foreign currency exchange rate risk. 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 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 entering into International Swaps and Derivatives Association, Inc. (“ISDA”) Master Agreements, which include provisions for a legally enforceable master netting agreement, with almost all of our derivative counterparties. See "Note 14 - Supplemental Financial Information" for additional information on the mitigation of credit risk relating to counterparties of our derivatives. We do not enter into derivatives for trading or other speculative purposes.

All derivatives were recorded on our consolidated balance sheets at fair value. Derivatives subject to legally enforceable master netting agreements were not offset on our consolidated balance sheets. 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. See "Note 1 - Description of the Business and Summary of Significant Accounting Policies" for additional information on our accounting policy for derivatives and "Note 2 - Fair Value Measurements" for additional information on the fair value measurement of our derivatives.

As of December 31, 2014 and 2013, our consolidated balance sheets included net foreign currency derivative liabilities of $26.3 million and net assets of $1.8 million, respectively.  All of our derivatives mature during the next 18 months.  

Derivatives recorded at fair value on our consolidated balance sheets as of December 31, 2014 and 2013 consisted of the following (in millions):

	Derivative Assets				Derivative Liabilities
	2014		2013		2014		2013
Derivatives Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	$	.4	$	9.1	$	17.2	$	9.8
Foreign currency forward contracts - non-current(2)	.1		1.2		2.9		.6
	.5		10.3		20.1		10.4
Derivatives not Designated as Hedging Instruments
Foreign currency forward contracts - current(1)	.2		2.5		6.9		.6
	.2		2.5		6.9		.6
Total	$	.7	$	12.8	$	27.0	$	11.0

⁽¹⁾  Derivative assets and liabilities that have maturity dates equal to or less than 12 months from the respective balance sheet dates were included in other current assets and accrued liabilities and other, respectively, on our consolidated balance sheets.

⁽²⁾  Derivative assets and liabilities that have maturity dates greater than 12 months from the respective balance sheet dates were included in other assets, net, and other liabilities, respectively, on our 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 December 31, 2014, we had cash flow hedges outstanding to exchange an aggregate $373.1 million for various foreign currencies, including $194.3 million for British pounds, $81.2 million for Brazilian reais, $35.5 million for Euros, $28.5 million for Singapore dollars, $20.1 million for Australian dollars and $13.5 million for other currencies.

Gains and losses, net of tax, on derivatives designated as cash flow hedges included in our consolidated statements of operations and comprehensive income for each of the years in the three-year period ended December 31, 2014 were as follows (in millions):

	(Loss) Gain Recognized in Other Comprehensive Income ("OCI") on Derivatives   (Effective Portion)								(Loss) Gain Reclassified from  AOCI into Income (Effective Portion)(1)									Loss Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(2)
	2014			2013			2012		2014			2013			2012			2014			2013			2012
Interest rate lock contracts(3)	$	—		$	—		$	—	$	(.4	)	$	(.4	)	$	(.5	)	$	—		$	—		$	—
Foreign currency forward contracts(4)	(11.7		)	(5.8		)	8.7		1.3			(1.6		)	.5			(.7		)	(.3		)	(.3		)
Total	$	(11.7	)	$	(5.8	)	$	8.7	$	.9		$	(2.0	)	$	—		$	(.7	)	$	(.3	)	$	(.3	)

⁽¹⁾ Changes in the fair value of cash flow hedges are recorded in AOCI.  Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction.

⁽²⁾  Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our consolidated statements of operations.

⁽³⁾  Losses on interest rate lock derivatives reclassified from AOCI into income (effective portion) were included in interest expense, net in our consolidated statements of operations.

⁽⁴⁾  During the year ended December 31, 2014, $400,000 of gains were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations. During the year ended December 31, 2013, $2.5 million of losses were reclassified from AOCI into contract drilling expense and $900,000 of gains were reclassified from AOCI into depreciation expense in our consolidated statement of operations.

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 December 31, 2014, we held derivatives not designated as hedging instruments to exchange an aggregate $207.5 million for various foreign currencies, including $98.9 million for Euros, $36.1 million for British pounds, $31.1 million for Swiss francs, $10.3 million for Indonesian Rupiah, $8.6 million for Brazilian reais and $22.5 million for other currencies.

Net losses of $24.8 million and net gains of $3.6 million and $1.5 million associated with our derivatives not designated as hedging instruments were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.

As of December 31, 2014, the estimated amount of net losses associated with derivatives, net of tax, that will be reclassified to earnings during the next 12 months was as follows (in millions):

Net unrealized losses to be reclassified to contract drilling expense	$	(9.4	)
Net realized gains to be reclassified to depreciation expense	.9
Net realized losses to be reclassified to interest expense	(.4		)
Net losses to be reclassified to earnings	$	(8.9	)

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Description Of The Business And Summary Of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Description Of The Business And Summary Of Significant Accounting Policies [Abstract]

Business

Business

We are one of the leading providers of offshore contract drilling services to the international oil and gas industry. We own an offshore drilling rig fleet of 70 rigs, including seven rigs under construction, spanning most of the strategic markets around the globe. Our rig fleet includes ten drillships, 13 dynamically positioned semisubmersible rigs, five moored semisubmersible rigs and 42 jackup rigs.  Our fleet is the world's second largest amongst competitive rigs, our ultra-deepwater fleet is one of the newest in the industry, and our premium jackup fleet is the largest of any offshore drilling company.

Our customers include many of the leading national and international oil companies, in addition to many independent operators. We are among the most geographically diverse offshore drilling companies, with current operations and drilling contracts spanning approximately 20 countries on six continents in nearly every major offshore basin around the world. The markets in which we operate include the U.S. Gulf of Mexico, Mexico, Brazil, the Mediterranean, the North Sea, the Middle East, West Africa, Australia and Southeast Asia.

Redomestication

Redomestication

During 2009, we completed a reorganization of the corporate structure of the group of companies controlled by our predecessor, ENSCO International Incorporated ("Ensco Delaware"), pursuant to which an indirect, wholly-owned subsidiary merged with Ensco Delaware, and Ensco plc became our publicly-held parent company incorporated under English law (the "redomestication").

We remain subject to the U.S. Securities and Exchange Commission (the "SEC") reporting requirements, the mandates of the Sarbanes-Oxley Act of 2002, as amended, and the applicable corporate governance rules of the New York Stock Exchange ("NYSE"), and we will continue to report our consolidated financial results in U.S. dollars and in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"). We also must comply with additional reporting requirements of English law.

Basis Of Presentation-U.K. Companies Act 2006 Section 435 Statement

Basis of Presentation—U.K. Companies Act 2006 Section 435 Statement

The accompanying consolidated financial statements have been prepared in accordance with U.S. GAAP, which the Board of Directors consider to be the most meaningful presentation of our results of operations and financial position.  The accompanying consolidated financial statements do not constitute statutory accounts required by the U.K. Companies Act 2006, which for the year ended December 31, 2014 will be prepared in accordance with generally accepted accounting principles in the U.K. and delivered to the Registrar of Companies in the U.K. following the annual general meeting of shareholders.  The U.K. statutory accounts are expected to include an unqualified auditor’s report, which is not expected to contain any references to matters on which the auditors drew attention by way of emphasis without qualifying the report or any statements under Sections 498(2) or 498(3) of the U.K. Companies Act 2006.

Principles Of Consolidation

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Ensco plc and its majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Certain previously reported amounts have been reclassified to conform to the current year presentation.

Cash Equivalents And Short-Term Investments

Cash Equivalents and Short-Term Investments

Highly liquid investments with maturities of three months or less at the date of purchase are considered cash equivalents. Highly liquid investments with maturities of greater than three months but less than one year at the date of purchase are classified as short-term investments.

Short-term investments, consisting of time deposits with initial maturities in excess of three months but less than one year, were included in other current assets on our consolidated balance sheets and totaled $757.3 million and $50.0 million as of December 31, 2014 and 2013, respectively. Cash flows from purchases and maturities of short-term investments were classified as investing activities in our consolidated statements of cash flows for the years ended December 31, 2014, 2013 and 2012.

Pervasiveness Of Estimates

Pervasiveness of Estimates

The preparation of financial statements in conformity with U.S. GAAP 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.

Foreign Currency Remeasurement And Translation

Foreign Currency Remeasurement and Translation

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 ("foreign currencies"). These transactions are remeasured in U.S. dollars based on a combination of both current and historical exchange rates. Most transaction gains and losses, including certain gains and losses on our derivative instruments, are included in other, net, in our consolidated statement of operations.  Certain gains and losses from the translation of foreign currency balances of our non-U.S. dollar functional currency subsidiaries are included in accumulated other comprehensive income on our consolidated balance sheet.  Net foreign currency exchange gains and losses, inclusive of offsetting fair value derivatives, were $2.6 million of losses, $6.4 million of gains and $3.5 million of losses, and were included in other, net, in our consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.

Property And Equipment

Property and Equipment

All costs incurred in connection with the acquisition, construction, major enhancement and improvement of assets are capitalized, including allocations of interest incurred during periods that our drilling rigs are under construction or undergoing major enhancements and improvements. Repair and maintenance costs are charged to contract drilling expense in the period in which they are incurred. Upon sale or retirement of assets, the related cost and accumulated depreciation are removed from the balance sheet, and the resulting gain or loss is included in contract drilling expense, unless reclassified to discontinued operations.

Our property and equipment is depreciated on a straight-line basis, after allowing for salvage values, over the estimated useful lives of our assets. Drilling rigs and related equipment are depreciated over estimated useful lives ranging from four to 35 years.  Buildings and improvements are depreciated over estimated useful lives ranging from two to 30 years. Other equipment, including computer and communications hardware and software costs, is depreciated over estimated useful lives ranging from two to six years.

We evaluate the carrying value of our property and equipment for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. 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. Property and equipment held for sale is recorded at the lower of net book value or net realizable value.

During 2014, we recorded a pre-tax, non cash loss on impairment of long-lived assets of $2.5 billion. See "Note 3 - Property and Equipment" for additional information on these impairments.

If the global economy deteriorates and/or our expectation relative to future offshore drilling industry conditions decline, it is reasonably possible that additional impairment charges may occur with respect to specific individual rigs, groups of rigs, such as a specific type of drilling rig, or rigs in a certain geographic location.

Goodwill

Goodwill

Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

We test goodwill for impairment on an annual basis as of December 31 of each year 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.

If we conclude that the fair value of one or both of our reporting units has more-likely-than-not declined below its carrying amount after qualitatively assessing existing facts and circumstances, we perform a quantitative assessment whereby we estimate the fair value of each reporting unit.  In most instances, our calculation of the fair value of our reporting units is based on estimates of future discounted cash flows to be generated by the drilling rigs in the reporting unit.

Based on a qualitative assessment performed as of December 31, 2014, we concluded it was more-likely-than-not that the fair value of our Floater reporting unit was less than its carrying amount and performed a quantitative assessment. As a result, we concluded that our Floater reporting unit goodwill balance was impaired. See "Note 8 - Goodwill and Other Intangible Assets and Liabilities" for additional information on our goodwill.

We concluded the fair value of our Jackup reporting more-likely-than-not exceeded its carrying amount, and there was no impairment of goodwill.

Operating Revenues And Expenses

Operating Revenues and Expenses

Substantially all of our drilling contracts ("contracts") are performed on a day rate basis, and the terms of such contracts are typically for a specific period of time or the period of time required to complete a specific task, such as drill a well. Contract revenues and expenses are recognized on a per day basis, as the work is performed. Day rate revenues are typically earned, and contract drilling expense is typically incurred, on a uniform basis over the terms of our contracts.

In connection with some contracts, we receive lump-sum fees or similar compensation for the mobilization of equipment and personnel prior to the commencement of drilling services or the demobilization of equipment and personnel upon contract completion. Fees received for the mobilization or demobilization of equipment and personnel are included in operating revenues. The costs incurred in connection with the mobilization and demobilization of equipment and personnel are included in contract drilling expense.

Mobilization fees received and costs incurred prior to commencement of drilling operations are deferred and recognized on a straight-line basis over the period that the related drilling services are performed. Demobilization fees and related costs are recognized as incurred upon contract completion. Costs associated with the mobilization of equipment and personnel to more promising market areas without contracts are expensed as incurred.

Deferred mobilization costs were included in other current assets and other assets, net, on our consolidated balance sheets and totaled $95.7 million and $66.6 million as of December 31, 2014 and 2013, respectively. Deferred mobilization revenue was included in accrued liabilities and other, and other liabilities on our consolidated balance sheets and totaled $149.4 million and $76.8 million as of December 31, 2014 and 2013, respectively.

In connection with some contracts, we receive up-front lump-sum fees or similar compensation for capital improvements to our drilling rigs. Such compensation is deferred and recognized as revenue over the period that the related drilling services are performed. The cost of such capital improvements is capitalized and depreciated over the useful life of the asset. Deferred revenue associated with capital improvements was included in accrued liabilities and other, and other liabilities on our consolidated balance sheets and totaled $428.9 million and $273.6 million as of December 31, 2014 and 2013, respectively.

We must obtain certifications from various regulatory bodies in order to operate our drilling rigs and must maintain such certifications through periodic inspections and surveys. The costs incurred in connection with maintaining such certifications, including inspections, tests, surveys and drydock, as well as remedial structural work and other compliance costs, are deferred and amortized over the corresponding certification periods. Deferred regulatory certification and compliance costs were included in other current assets and other assets, net, on our consolidated balance sheets and totaled $20.0 million and $18.3 million as of December 31, 2014 and 2013, respectively.

In certain countries in which we operate, taxes such as sales, use, value-added, gross receipts and excise may be assessed by the local government on our revenues. We generally record our tax-assessed revenue transactions on a net basis in our consolidated statement of operations.

Derivative Instruments

Derivative Instruments

We use derivatives to reduce our exposure to various market risks, primarily foreign currency exchange rate risk. See "Note 5 - Derivative Instruments" for additional information on how and why we use derivatives.

All derivatives are recorded on our consolidated balance sheet at fair value. Derivatives subject to legally enforceable master netting agreements are not offset on our consolidated balance sheet. 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. Derivatives qualify for hedge accounting when they are formally designated as hedges and are effective in reducing the risk exposure that they are designated to hedge. Our assessment of hedge effectiveness is formally documented at hedge inception, and we review hedge effectiveness and measure any ineffectiveness throughout the designated hedge period on at least a quarterly basis.

Changes in the fair value of derivatives that are designated as hedges of the variability in expected future cash flows associated with existing recognized assets or liabilities or forecasted transactions ("cash flow hedges") are recorded in accumulated other comprehensive income ("AOCI").  Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transactions.

Gains and losses on a cash flow hedge, or a portion of a cash flow hedge, that no longer qualifies as effective due to an unanticipated change in the forecasted transaction are recognized currently in earnings and included in other, net, in our consolidated statement of operations based on the change in the fair value of the derivative. When a forecasted transaction is probable of not occurring, gains and losses on the derivative previously recorded in AOCI are reclassified currently into earnings and included in other, net, in our consolidated statement of operations.

We occasionally enter into derivatives that hedge the fair value of recognized assets or liabilities, but do not designate such derivatives as hedges or the derivatives otherwise do not qualify for hedge accounting. In these situations, there generally is a natural hedging relationship where changes in the fair value of the derivatives offset changes in the fair value of the underlying hedged items. Changes in the fair value of these derivatives are recognized currently in earnings in other, net, in our consolidated statement of operations.

Derivatives with asset fair values are reported in other current assets or other assets, net, on our consolidated balance sheet depending on maturity date. Derivatives with liability fair values are reported in accrued liabilities and other, or other liabilities on our consolidated balance sheet depending on maturity date.

Income Taxes

Income Taxes

We conduct operations and earn income in numerous countries. Current income taxes are recognized for the amount of taxes payable or refundable based on the laws and income tax rates in the taxing jurisdictions in which operations are conducted and income is earned.

Deferred tax assets and liabilities are recognized for the anticipated future tax effects of temporary differences between the financial statement basis and the tax basis of our assets and liabilities using the enacted tax rates in effect at year-end. A valuation allowance for deferred tax assets is recorded when it is more-likely-than-not that the benefit from the deferred tax asset will not be realized. We do not offset deferred tax assets and deferred tax liabilities attributable to different tax paying jurisdictions.

We operate in certain jurisdictions where tax laws relating to the offshore drilling industry are not well developed and change frequently. Furthermore, we may enter into transactions with affiliates or employ other tax planning strategies that generally are subject to complex tax regulations. As a result of the foregoing, the tax liabilities and assets we recognize in our financial statements may differ from the tax positions taken, or expected to be taken, in our tax returns. Our tax positions are evaluated for recognition using a more-likely-than-not threshold, and those tax positions requiring recognition are measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon effective settlement with a taxing authority that has full knowledge of all relevant information. Interest and penalties relating to income taxes are included in current income tax expense in our consolidated statement of operations.

Our drilling rigs frequently move from one taxing jurisdiction to another based on where they are contracted to perform drilling services. The movement of drilling rigs among taxing jurisdictions may involve a transfer of drilling rig ownership among our subsidiaries (“intercompany rig sale”). The pre-tax profit resulting from an intercompany rig sale is eliminated from our consolidated financial statements, and the carrying value of a rig sold in an intercompany transaction remains at historical net depreciated cost prior to the transaction. Our consolidated financial statements do not reflect the asset disposition transaction of the selling subsidiary or the asset acquisition transaction of the acquiring subsidiary. Income taxes resulting from an intercompany rig sale, as well as the tax effect of any reversing temporary differences resulting from the sale, are deferred and amortized on a straight-line basis over the remaining useful life of the rig.

In some instances, we may determine that certain temporary differences will not result in a taxable or deductible amount in future years, as it is more-likely-than-not we will commence operations and depart from a given taxing jurisdiction without such temporary differences being recovered or settled. Under these circumstances, no future tax consequences are expected and no deferred taxes are recognized in connection with such operations. We evaluate these determinations on a periodic basis and, in the event our expectations relative to future tax consequences change, the applicable deferred taxes are recognized or derecognized.

We do not provide deferred taxes on the undistributed earnings of certain subsidiaries because our policy and intention is to reinvest such earnings indefinitely. See "Note 9 - Income Taxes" for additional information on our deferred taxes, unrecognized tax benefits, intercompany transfers of drilling rigs and undistributed earnings.

Share-Based Compensation

Share-Based Compensation

We sponsor share-based compensation plans that provide equity compensation to our key employees, officers and non-employee directors. Share-based compensation cost is measured at fair value on the date of grant and recognized on a straight-line basis over the requisite service period (usually the vesting period). The amount of compensation cost recognized in our consolidated statement of operations is based on the awards ultimately expected to vest and, therefore, reduced for estimated forfeitures. All changes in estimated forfeitures are based on historical experience and are recognized as a cumulative adjustment to compensation cost in the period in which they occur. See "Note 7 - Benefit Plans" for additional information on our share-based compensation.

Fair Value Measurements

Fair Value Measurements

We measure certain of our assets and liabilities based on a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy assigns the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities ("Level 1") and the lowest priority to unobservable inputs ("Level 3").  Level 2 measurements represent inputs that are observable for similar assets or liabilities, either directly or indirectly, other than quoted prices included within Level 1.  See "Note 2 - Fair Value Measurements" for additional information on the fair value measurement of certain of our assets and liabilities.

Earnings Per Share

Earnings Per Share

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

The following table is a reconciliation of (loss) income from continuing operations attributable to Ensco shares used in our basic and diluted EPS computations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
(Loss) income from continuing operations attributable to Ensco	$	(2,703.1	)	$	1,421.6		$	1,069.6
Income from continuing operations allocated to non-vested share awards	(7.9		)	(15.1		)	(11.2		)
(Loss) income from continuing operations attributable to Ensco shares	$	(2,711.0	)	$	1,406.5		$	1,058.4

The following table is a reconciliation of the weighted-average shares used in our basic and diluted earnings per share computations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014	2013	2012
Weighted-average shares - basic	231.6	230.9	229.4
Potentially dilutive shares	—	.2	.3
Weighted-average shares - diluted	231.6	231.1	229.7

Antidilutive share options totaling 400,000, 300,000 and 400,000 for the years ended December 31, 2014, 2013 and 2012, respectively, were excluded from the computation of diluted EPS.

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Segment Information

12 Months Ended

Dec. 31, 2014

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Segment Information

SEGMENT INFORMATION

    Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

Segment information for each of the years in the three-year period ended December 31, 2014 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." We measure segment assets as property and equipment. Prior year information has been reclassified to conform to the current year presentation.

Year Ended December 31, 2014

	Floaters			Jackups		Other		Operating Segments Total			Reconciling Items			Consolidated Total
Revenues	$	2,697.6		$	1,774.6	$	92.3	$	4,564.5		$	—		$	4,564.5
Operating expenses
Contract drilling   (exclusive of depreciation)	1,201.2			807.4		68.3		2,076.9			—			2,076.9
Loss on impairment	3,982.3			236.4		—		4,218.7			—			4,218.7
Depreciation	358.1			171.2		—		529.3			8.6			537.9
General and administrative	—			—		—		—			131.9			131.9
Operating (loss) income	$	(2,844.0	)	$	559.6	$	24.0	$	(2,260.4	)	$	(140.5	)	$	(2,400.9	)
Property and equipment, net	$	9,462.3		$	2,995.3	$	—	$	12,457.6		$	77.2		$	12,534.8
Capital expenditures	$	856.2		$	667.7	$	—	$	1,523.9		$	44.9		$	1,568.8

Year Ended December 31, 2013

	Floaters		Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	2,659.6	$	1,588.7	$	75.1	$	4,323.4	$	—		$	4,323.4
Operating expenses
Contract drilling   (exclusive of depreciation)	1,126.0		762.6		58.5		1,947.1		—			1,947.1
Depreciation	342.2		147.5		—		489.7		6.5			496.2
General and administrative	—		—		—		—		146.8			146.8
Operating income (loss)	$	1,191.4	$	678.6	$	16.6	$	1,886.6	$	(153.3	)	$	1,733.3
Property and equipment, net	$	11,303.4	$	2,961.6	$	—	$	14,265.0	$	46.0		$	14,311.0
Capital expenditures	$	1,028.6	$	708.3	$	—	$	1,736.9	$	26.6		$	1,763.5

Year Ended December 31, 2012

	Floaters		Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
Revenues	$	2,149.1	$	1,406.9	$	82.8	$	3,638.8	$	—		$	3,638.8
Operating expenses
Contract drilling   (exclusive of depreciation)	894.5		687.2		61.1		1,642.8		—			1,642.8
Depreciation	283.3		151.6		—		434.9		8.9			443.8
General and administrative	—		—		—		—		148.9			148.9
Operating income (loss)	$	971.3	$	568.1	$	21.7	$	1,561.1	$	(157.8	)	$	1,403.3
Property and equipment, net	$	10,727.6	$	2,389.8	$	—	$	13,117.4	$	28.2		$	13,145.6
Capital expenditures	$	1,519.4	$	191.1	$	—	$	1,710.5	$	2.7		$	1,713.2

Information about Geographic Areas

As of December 31, 2014, our Floaters segment consisted of seven drillships, 13 dynamically positioned semisubmersible rigs and five moored semisubmersible rigs deployed in various locations throughout North and South America, Middle East and Africa, Asia Pacific, Europe and the Mediterranean and Brazil. Additionally, our Floaters segment included three ultra-deepwater drillships under construction in South Korea.  

Our Jackups segment consisted of 42 jackup rigs, of which 38 were deployed in various locations throughout North and South America, Middle East and Africa, Asia Pacific and Europe and the Mediterranean and four of which were under construction in Singapore and the United Arab Emirates.  

As of December 31, 2014, the geographic distribution of our drilling rigs by operating segment was as follows:

	Floaters(1)	Jackups(1)	Total(2)
North & South America (excluding Brazil)	9	8	17
Middle East & Africa	4	11	15
Europe & the Mediterranean	4	11	15
Asia & Pacific Rim	4	8	12
Asia & Pacific Rim (under construction)	3	2	5
Brazil	4	—	4
Middle East & Africa (under construction)	—	2	2
Total	28	42	70

⁽¹⁾  The five floaters and two jackups classified as "held for sale" as of December 31, 2014 are included in the table above.

⁽²⁾  We provide management services on six rigs owned by third-parties not included in the table above. 

For purposes of our geographic disclosure, we attribute revenues to the geographic location where such revenues are earned and assets to the geographic location of the drilling rig as of the end of the applicable year. For new construction projects, assets are attributed to the location of future operation if known or to the location of construction if the ultimate location of operation is undetermined.

Information by country for those countries that account for more than 10% of total revenues or 10% of our long-lived assets was as follows (in millions):

	Revenues						Long-lived Assets
	2014		2013		2012		2014		2013		2012
United States	$	1,712.4	$	1,687.2	$	1,265.5	$	5,240.4	$	4,617.8	$	4,525.9
Angola	607.9		365.9		190.0		1,913.5		2,543.7		2,147.2
Brazil	459.1		683.7		776.3		1,459.0		2,447.5		2,911.3
Other countries	1,785.1		1,586.6		1,407.0		3,921.9		4,702.0		3,561.2
Total	$	4,564.5	$	4,323.4	$	3,638.8	$	12,534.8	$	14,311.0	$	13,145.6

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Supplemental Financial Information (Other Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Supplemental Financial Information [Abstract]
Deferred revenue	$ 373.2	$ 217.6
Intangible liabilities	40.7	69.1
Unrecognized tax benefits (inclusive of interest and penalties)	142.4	148.0
Supplemental executive retirement plan liabilities	45.1	40.5
Personnel costs	26.1	37.2
Other Accrued Liabilities, Noncurrent	39.8	33.3
Other liabilities	$ 667.3	$ 545.7

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Income Taxes

12 Months Ended

Dec. 31, 2014

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

Income Taxes

INCOME TAXES

We generated loss of $460.3 million, income of $173.4 million and $101.1 million from continuing operations before income taxes in the U.S. and loss of $2.1 billion, income of $1.5 billion and $1.2 billion from continuing operations before income taxes in non-U.S. countries for the years ended December 31, 2014, 2013 and 2012, respectively.

The following table summarizes components of the provision for income taxes from continuing operations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Current income tax expense:
U.S.	$	114.8		$	94.4		$	46.6
Non-U.S.	149.2			98.6			154.2
	264.0			193.0			200.8
Deferred income tax expense (benefit):
U.S.	(86.7		)	19.2			29.4
Non-U.S.	(36.8		)	(9.1		)	(1.6		)
	(123.5		)	10.1			27.8
Total income tax expense	$	140.5		$	203.1		$	228.6

Deferred Taxes

The following table summarizes significant components of deferred income tax assets (liabilities) as of December 31, 2014 and 2013 (in millions):

	2014			2013
Deferred tax assets:
Net operating loss carryforwards	$	204.5		$	104.0
Deferred revenue	103.0			19.4
Premium on long-term debt	99.2			111.9
Foreign tax credits	98.6			159.0
Employee benefits, including share-based compensation	39.5			41.7
Other	16.7			19.8
Total deferred tax assets	561.5			455.8
Valuation allowance	(271.3		)	(232.6		)
Net deferred tax assets	290.2			223.2
Deferred tax liabilities:
Property and equipment	(314.2		)	(453.6		)
Intercompany transfers of property	(23.0		)	(29.2		)
Deferred costs	(20.2		)	(11.4		)
Other	(14.1		)	(24.0		)
Total deferred tax liabilities	(371.5		)	(518.2		)
Net deferred tax liability	$	(81.3	)	$	(295.0	)
Net current deferred tax asset	$	41.4		$	20.9
Net noncurrent deferred tax liability	(122.7		)	(315.9		)
Net deferred tax liability	$	(81.3	)	$	(295.0	)

The realization of substantially all of our deferred tax assets is dependent on generating sufficient taxable income during future periods in various jurisdictions in which we operate. Realization of certain of our deferred tax assets is not assured. We recognize a valuation allowance for deferred tax assets when it is more-likely-than-not that the benefit from the deferred tax asset will not be realized. The amount of deferred tax assets considered realizable could increase or decrease in the near-term if our estimates of future taxable income change.

As of December 31, 2014, we had deferred tax assets of $98.6 million for U.S. foreign tax credits (“FTC”) and $204.5 million related to $814.5 million of net operating loss (“NOL”) carryforwards, which can be used to reduce our income taxes payable in future years.  The FTC expire between 2017 and 2023.  NOL carryforwards, which were generated in various jurisdictions worldwide, include $459.5 million that do not expire and $355.0 million that will expire, if not utilized, beginning in 2015 through 2020.  Due to the uncertainty of realization, we have a $267.5 million valuation allowance on FTC and NOL carryforwards, primarily relating to countries where we no longer operate or do not expect to generate future taxable income.

Effective Tax Rate

     Ensco plc, our parent company, is domiciled and resident in the U.K. Our subsidiaries conduct operations and earn income in numerous countries and are subject to the laws of taxing jurisdictions within those countries. The income of our non-U.K. subsidiaries is not subject to U.K. taxation. As a result of frequent changes in the taxing jurisdictions in which our drilling rigs are operated and/or owned, changes in the overall level of our income and changes in tax laws, our consolidated effective income tax rate may vary substantially from one reporting period to another. Our consolidated effective income tax rate on continuing operations for each of the years in the three-year period ended December 31, 2014, differs from the U.K. statutory income tax rate as follows:

	2014		2013		2012
U.K. statutory income tax rate	21.5	%	23.3	%	24.5	%
Goodwill impairment	(25.3	)	—		—
Assets impairment	(10.9	)	—		—
Non-U.K. taxes	9.6		(13.2	)	(17.5	)
Valuation allowance	(1.1	)	1.0		5.0
Income taxes associated with restructuring transactions	—		—		3.9
Other	.7		1.3		1.6
Effective income tax rate	(5.5	)%	12.4	%	17.5	%

Our consolidated effective income tax rate for 2014 includes the impact of various discrete tax items, including the recognition of a net $18.4 million tax expense associated with liabilities for unrecognized tax benefits and other adjustments relating to prior years, and a $16.4 million tax benefit associated with rig impairments. In addition, we recognized a net $41.4 million tax benefit in connection with the utilization of foreign tax credits that were previously subject to a valuation allowance.

The majority of discrete tax expense recognized during 2013 was attributable to the recognition of a $7.4 million liability for taxes associated with a $30.6 million reimbursement from the resolution of a dispute with the Mexican tax authority and a $7.0 million increase in the valuation allowance on U.S. foreign tax credits resulting from a restructuring transaction in December 2013.

The majority of discrete tax expense recognized during 2012 was attributable to $51.2 million of income tax expense associated with the restructuring of certain subsidiaries of Pride in December 2012, and tax expense associated with liabilities for unrecognized tax benefits and other adjustments relating to prior years.

Excluding the impact of the aforementioned tax items and goodwill and asset impairments, our consolidated effective income tax rates for the years ended December 31, 2014, 2013 and 2012 were 10.7%, 12.2% and 12.4%, respectively. The changes in our consolidated effective income tax rate excluding discrete tax items during the three years result primarily from changes in the relative components of our earnings from the various taxing jurisdictions in which our drilling rigs are operated and/or owned and the differences in the tax rates in such tax jurisdictions.

Unrecognized Tax Benefits

Our tax positions are evaluated for recognition using a more-likely-than-not threshold, and those tax positions requiring recognition are measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon effective settlement with a taxing authority that has full knowledge of all relevant information.  As of December 31, 2014, we had $134.4 million of unrecognized tax benefits, of which $115.9 million was included in other liabilities on our consolidated balance sheet and the remaining $18.5 million, which is associated with a tax position taken in tax years with NOL carryforwards, was presented as a reduction of deferred tax assets. As of December 31, 2013, we had $151.7 million of unrecognized tax benefits, of which $130.7 million was included in other liabilities on our consolidated balance sheet and the remaining $21.0 million was presented as a reduction of deferred tax assets. If recognized, $110.4 million of our unrecognized tax benefits would impact our consolidated effective income tax rate. A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2014 and 2013 is as follows (in millions):

	2014			2013
Balance, beginning of year	$	151.7		$	110.7
Increases in unrecognized tax benefits as a result       of tax positions taken during prior years	16.3			35.8
Increases in unrecognized tax benefits as a result       of tax positions taken during the current year	5.5			10.0
Decreases in unrecognized tax benefits as a result       of tax positions taken during prior years	(15.5		)	(3.7		)
Settlements with taxing authorities	(14.2		)	—
Lapse of applicable statutes of limitations	(.7		)	(1.1		)
Impact of foreign currency exchange rates	(8.7		)	—
Balance, end of year	$	134.4		$	151.7

Accrued interest and penalties totaled $26.5 million and $17.3 million as of December 31, 2014 and 2013, respectively, and were included in other liabilities on our consolidated balance sheets. We recognized net expense of $9.2 million, benefits $1.6 million and $2.8 million associated with interest and penalties during the years ended December 31, 2014, 2013 and 2012, respectively. Interest and penalties are included in current income tax expense in our consolidated statements of operations.

Tax years as early as 2004 remain subject to examination in the major tax jurisdictions in which we operated. Ensco Delaware and Ensco United Incorporated, an indirect wholly-owned subsidiary of Ensco, participate in the U.S. Internal Revenue Service’s Compliance Assurance Process ("IRS CAP") which, among other things, provides for the resolution of tax issues in a timely manner and generally eliminates the need for lengthy post-filing examinations. The 2010, 2011, 2012 and 2013 U.S. federal tax returns of Ensco Delaware remain subject to examination under the IRS CAP.

Statutes of limitations applicable to certain of our tax positions lapsed during 2014, 2013 and 2012, resulting in net income tax benefits, inclusive of interest and penalties, of $2.4 million, $3.1 million and $28.6 million, respectively.

Statutes of limitations applicable to certain of our tax positions will lapse during 2015.  Therefore, it is reasonably possible that our unrecognized tax benefits will decline during the next 12 months by $9.6 million, inclusive of $2.8 million of accrued interest and penalties, all of which would impact our consolidated effective income tax rate if recognized.

Intercompany Transfer of Drilling Rigs

During the three-year period ended December 31, 2014, we transferred ownership of certain drilling rigs among our subsidiaries, including three jackup rigs during 2014, two semisubmersible rigs during 2013 and one jackup rig during 2012.  There was no income tax liability associated with the intercompany transfers of drilling rigs during 2014 and 2013. A $1.7 million income tax liability resulted from the gain on the intercompany transfer of the jackup rig in 2012. The related income tax expense was deferred and is being amortized on a straight-line basis over the 15-year remaining useful life of the rig. There were no temporary differences associated with any of the intercompany transfers of drilling rigs during the three-year period ended December 31, 2014

As of December 31, 2014 and 2013, the unamortized balance associated with deferred charges for income taxes incurred in connection with intercompany transfers of drilling rigs totaled $39.7 million and $50.2 million, respectively, and was included in other assets, net, on our consolidated balance sheets. Current income tax expense for the years ended December 31, 2014, 2013 and 2012 included $2.6 million, $4.1 million and $9.1 million, respectively, of amortization of income taxes incurred in connection with intercompany transfers of drilling rigs.

As of December 31, 2014 and 2013, the unamortized balance associated with the deferred tax liability for reversing temporary differences of transferred drilling rigs totaled $23.0 million and $29.2 million, respectively, and was included in deferred income taxes on our consolidated balance sheets.  Deferred income tax benefit for the year ended December 31, 2014 and deferred income tax expense for the years ended December 31, 2013 and 2012 included benefits of $4.8 million, $1.9 million and $3.4 million, respectively, of amortization of deferred reversing temporary differences associated with intercompany transfers of drilling rigs.

Undistributed Earnings

Dividend income received by Ensco plc from its subsidiaries is exempt from U.K. taxation. We do not provide deferred taxes on undistributed earnings of certain subsidiaries because our policy and intention is to reinvest such earnings indefinitely. Each of the subsidiaries for which we maintain such policy has significant net assets, liquidity, contract backlog and/or other financial resources available to meet operational and capital investment requirements and otherwise allow us to continue to maintain our policy of reinvesting the undistributed earnings indefinitely.

In December 2012, a U.S. subsidiary received $530.0 million in earnings distributions from two non-U.S. subsidiaries. There was no net U.S. tax liability on the earnings repatriation, as we utilized net operating loss carryforwards to offset the previously untaxed portion of the earnings distribution. The earnings distribution was made in consideration of unique circumstances, and our U.S. subsidiaries continue to have significant net assets, liquidity, contract backlog and other financial resources available to meet operational and capital investment requirements. Accordingly, this distribution did not change, and we continue to maintain, our policy and intention to reinvest the undistributed earnings of the two aforementioned subsidiaries indefinitely.

As of December 31, 2014 and 2013, the aggregate undistributed earnings of the subsidiaries for which we maintain a policy and intention to reinvest earnings indefinitely totaled $2.3 billion and $2.1 billion, respectively. Should we make a distribution from these subsidiaries in the form of dividends or otherwise, we would be subject to additional income taxes. The unrecognized deferred tax liability related to these undistributed earnings was not practicable to estimate as of December 31, 2014.

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Benefit Plans (Summary Of Value Of Non-Vested Share Awards Granted And Vested) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted-average grant-date fair value of non-vested share awards granted (per share)	$ 51.22	$ 59.79	$ 48.32
Total fair value of non-vested share awards vested during the period (in millions)	$ 46.2	$ 49.6	$ 42.5

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Benefit Plans

12 Months Ended

Dec. 31, 2014

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

Benefit Plans

BENEFIT PLANS

Our shareholders approved the 2012 Long-Term Incentive Plan (the “2012 LTIP”) effective January 1, 2012, to provide for the issuance of non-vested share awards, share option awards and performance awards (collectively "awards"). Under the 2012 LTIP, 14.0 million shares were reserved for issuance as awards to officers, non-employee directors and key employees who are in a position to contribute materially to our growth, development and long-term success. As of December 31, 2014, there were 7.7 million shares available for issuance as awards under the 2012 LTIP. Awards may be satisfied by newly issued shares, including shares held by a subsidiary or affiliated entity, or by delivery of shares held in an affiliated employee benefit trust at the Company's discretion.

Non-Vested Share Awards

Grants of non-vested share awards generally vest at rates of 20% or 33% per year, as determined by a committee or subcommittee of the Board of Directors at the time of grant. Our non-vested share awards have voting and dividend rights effective on the date of grant. Compensation expense is measured using the market value of our shares on the date of grant and is recognized on a straight-line basis over the requisite service period (usually the vesting period).

The following table summarizes non-vested share award related compensation expense recognized during each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Contract drilling	$	20.9		$	21.3		$	17.1
General and administrative	20.7			21.6			24.8
Non-vested share award related compensation expense included in operating expenses	41.6			42.9			41.9
Tax benefit	(5.1		)	(5.4		)	(7.0		)
Total non-vested share award related compensation expense included in net income	$	36.5		$	37.5		$	34.9

The following table summarizes the value of non-vested share awards granted and vested during each of the years in the three-year period ended December 31, 2014:

	2014		2013		2012
Weighted-average grant-date fair value of   non-vested share awards granted (per share)	$	51.22	$	59.79	$	48.32
Total fair value of non-vested share awards   vested during the period (in millions)	$	46.2	$	49.6	$	42.5

The following table summarizes non-vested share award activity for the year ended December 31, 2014 (shares in thousands): 

	Shares		Weighted-Average Grant-Date Fair Value
Non-vested share awards as of December 31, 2013	2,496		$	52.95
Granted	1,242		51.22
Vested	(898	)	51.07
Forfeited	(199	)	53.80
Non-vested share awards as of December 31, 2014	2,641		$	52.86

As of December 31, 2014, there was $100.7 million of total unrecognized compensation cost related to non-vested share awards, which is expected to be recognized over a weighted-average period of 2.1 years.

Share Option Awards

Share option awards ("options") granted to officers and employees generally become exercisable in 25% increments over a four-year period or 33% increments over a three-year period and, to the extent not exercised, expire on the seventh anniversary of the date of grant. Options granted to non-employee directors are immediately exercisable and, to the extent not exercised, expire on the seventh anniversary of the date of grant. The exercise price of options granted under the 2012 LTIP equals the market value of the underlying shares on the date of grant. As of December 31, 2014, options granted to purchase 472,000 shares with a weighted average exercise price of $41.09 were outstanding under the 2012 LTIP and predecessor or acquired plans. No options have been granted since 2011, and there were no unrecognized compensation costs related to options as of December 31, 2014.

Performance Awards

Under the 2012 LTIP, performance awards may be issued to our senior executive officers. Performance awards granted prior to 2013 are payable in Ensco shares, cash or a combination thereof upon attainment of specified performance goals based on relative total shareholder return ("TSR") and absolute and relative return on capital employed ("ROCE"). Performance awards granted during 2013 and 2014 are payable in Ensco shares upon attainment of specified performance goals based on relative TSR and relative ROCE. The performance goals are determined by a committee or subcommittee of the Board of Directors.

Performance awards generally vest at the end of a three-year measurement period based on attainment of performance goals. Our performance awards granted prior to 2013 are classified as liability awards with compensation expense measured based on the estimated probability of attainment of the specified performance goals and recognized on a straight-line basis over the requisite service period. The estimated probable outcome of attainment of the specified performance goals is based on historical experience, and any subsequent changes in this estimate are recognized as a cumulative adjustment to compensation cost in the period in which the change in estimate occurs.

Our performance awards granted during 2013 and 2014 are classified as equity awards with compensation expense recognized on a straight-line basis over the requisite service period. The estimated probable outcome of attainment of the specified performance goals is based on historical experience, and any subsequent changes in this estimate for the relative ROCE performance goal are recognized as a cumulative adjustment to compensation cost in the period in which the change in estimate occurs.

The aggregate grant-date fair value of performance awards granted during 2014, 2013 and 2012 totaled $7.4 million, $8.2 million and $7.2 million, respectively. The aggregate fair value of performance awards vested during 2014, 2013 and 2012 totaled $6.9 million, $7.4 million and $5.3 million, respectively, all of which was paid in cash.

During the years ended December 31, 2014, 2013 and 2012, we recognized $3.4 million, $6.6 million and $9.7 million of compensation expense for performance awards, respectively, which was included in general and administrative expense in our consolidated statements of operations.  As of December 31, 2014, there was $5.0 million of total unrecognized compensation cost related to unvested performance awards, which is expected to be recognized over a weighted-average period of 1.9 years.

Savings Plans

We have profit sharing plans (the "Ensco Savings Plan," the "Ensco Multinational Savings Plan" and the "Ensco Limited Retirement Plan"), which cover eligible employees, as defined within each plan.  The Ensco Savings Plan includes a 401(k) savings plan feature which allows eligible employees to make tax deferred contributions to the plan.  The Ensco Limited Retirement Plan also allows eligible employees to make tax deferred contributions to the plan. Contributions made to the Ensco Multinational Savings Plan may or may not qualify for tax deferral based on each plan participant's local tax requirements.

We generally make matching cash contributions to the plans.  We match 100% of the amount contributed by the employee up to a maximum of 5% of eligible salary. Matching contributions totaled $20.7 million, $21.1 million and $16.5 million for the years ended December 31, 2014, 2013 and 2012, respectively.  Profit sharing contributions made into the plans require approval of the Board of Directors and are generally paid in cash.  We recorded profit sharing contribution provisions of $30.7 million, $55.3 million and $45.1 million for the years ended December 31, 2014, 2013 and 2012, respectively.  Matching contributions and profit sharing contributions become vested in 33% increments upon completion of each initial year of service with all contributions becoming fully vested subsequent to achievement of three or more years of service.  We have 1.0 million shares reserved for issuance as matching contributions under the Ensco Savings Plan.

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Goodwill and Other Intangible Assets and Liabilities

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets and Liabilities

GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES

Goodwill

The carrying amount of goodwill as of December 31, 2014 is detailed below by reporting unit (in millions):

	December 31, 2014								December 31, 2013
	Gross Carrying Amount		Accumulated Impairment Losses			Net Carrying Amount			Gross Carrying Amount		Accumulated Impairment Losses		Net Carrying Amount
Floaters
Balance, beginning of period	$	3,081.4	$	—		$	3,081.4		$	3,081.4	$	—	$	3,081.4
Loss on impairment	—		(2,997.9		)	(2,997.9		)	—		—		—
Balance, end of period	$	3,081.4	$	(2,997.9	)	$	83.5		$	3,081.4	$	—	$	3,081.4
Jackups
Balance, beginning of period	$	192.6	$	—		$	192.6		$	192.6	$	—	$	192.6
Loss on impairment	—		—			—			—		—		—
Balance, end of period	$	192.6	$	—		$	192.6		$	192.6	$	—	$	192.6

Impairment of Goodwill

Our business consists of three operating segments: (1) Floaters, which includes our drillships and semisubmersible rigs, (2) Jackups and (3) Other, which consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.

We test goodwill for impairment on an annual basis or when events or changes in circumstances indicate that a potential impairment exists.  During the second quarter, demand for floaters deteriorated as a result of a continued reduction in capital spending by operators in addition to announced delays in operators’ drilling programs. The reduction in demand, combined with increasing supply from newbuild floater deliveries, led to a very competitive market. In general, contracting activity for floaters declined significantly and day rates and utilization came under pressure, especially for older, less capable floaters.

Management considered the adverse change in the floater business climate, the commitment to a plan to sell five floaters in May 2014, and the impairment charge on the "held for sale" floaters during the second quarter and concluded that a triggering event had occurred. We performed an interim goodwill impairment test to evaluate the recoverability of the Floaters reporting unit goodwill balance of $3.1 billion as of May 31, 2014. Based on the valuation performed, the Floaters reporting unit estimated fair value exceeded the carrying value by approximately 7%; therefore, we concluded that the goodwill balance was not impaired.  

As part of our annual goodwill impairment test as of December 31, 2014, we considered the significant decline in commodity prices during the fourth quarter of 2014. Specifically, Brent crude oil prices declined from approximately $95 per barrel at September 30, 2014 to near $55 per barrel at December 31, 2014. These declines resulted in further reductions in capital spending by operators, including the cancellation or deferral of planned drilling programs. We expect that this reduction in demand will cause further deterioration in day rates and utilization and that current market dynamics will create a challenging contracting environment into 2016.

Our stock price also declined significantly during the latter half of 2014, reaching a five-year low of $25.88 on December 16th. Our stock price traded between $25.88 and $41.99 during the fourth quarter of 2014 and averaged $35.23 during this period.

Management considered the adverse changes in the current floater business climate, the sustained decline in stock price and the impairment charge on older, less capable floaters during the fourth quarter and concluded it was more-likely-than-not that the fair value of the Floater reporting unit was less than its carrying amount. As a result, we estimated the fair value of the reporting unit using a blended income and market approach. Based on the valuation performed as of December 31, 2014, the reporting unit estimated fair value was less than the carrying value; therefore, we concluded that the Floater goodwill balance was impaired.  We compared the estimated fair value of the reporting unit to the fair value of all assets and liabilities of the reporting unit to calculate the implied fair value of goodwill. As a result, we recorded a non-cash loss on impairment totaling $3.0 billion which was included in loss on impairment in our consolidated statement of operations for the year ended December 31, 2014.

The income approach was based on a discounted cash flow model, which utilized present values of cash flows to estimate fair value. The future cash flows were projected based on our estimates of future day rates, utilization, operating costs, capital requirements, growth rates and terminal values. Forecasted day rates and utilization take into account current market conditions and our anticipated business outlook, both of which have been impacted by the adverse changes in the floater business environment during 2014. The day rates reflected contracted rates during the respective contracted periods and management's estimate of market day rates in uncontracted periods. The forecasted market day rates were held constant in the near-term but were forecasted to grow in the longer-term and terminal period.

Operating costs were forecasted using a combination of our historical average operating costs and expected future costs, adjusted for an estimated inflation factor. Capital requirements in the discounted cash flow model were based on management's estimates of future capital costs, taking into consideration our historical trends. The estimated capital requirements included cash outflows for new rig construction, rig enhancements and minor upgrades and improvements.

A terminal period was used to reflect our estimate of stable, perpetual growth. The terminal period reflects a terminal growth rate of 3.0%, which includes an estimated inflation factor. The future cash flows were discounted using a market-participant risk-adjusted weighted average cost of capital ("WACC") of 11.0%. These assumptions were derived from unobservable inputs and reflect management's judgments and assumptions.

The market approach was based upon the application of price-to-earnings multiples to management's estimates of future earnings adjusted for a control premium. The price-to-earnings multiples used in the market valuation ranged from 6.0x to 6.8x and were based on market participant multiples. Management's earnings estimates were derived from unobservable inputs that require significant estimates, judgments and assumptions as described in the income approach.

The estimated fair value of the Floaters reporting unit determined under the income approach was consistent with the estimated fair value determined under the market approach. For purposes of the goodwill impairment test, we calculated the Floaters reporting unit estimated fair value as the average of the values calculated under the income approach and the market approach.

We evaluated the estimated fair value of our reporting units compared to our market capitalization as of December 31, 2014. To perform this assessment, we used a market approach to estimate the fair value of the Jackups reporting unit. The aggregate fair values of our reporting units exceeded our market capitalization, and we believe the resulting implied control premium was reasonable based on recent market transactions within our industry or other relevant benchmark data.

We performed a qualitative assessment for our Jackup reporting unit as of December 31, 2014. Goodwill impairment tests performed during prior years indicated that the fair value of the Jackup reporting unit significantly exceeded its carrying amount. Despite the adverse changes in the offshore drilling climate, we concluded that the fair value remains substantially in excess of the carrying value of the reporting unit, as evidenced by the estimated fair value of the Jackup reporting unit calculated for the purpose of reconciling the fair value of our reporting units to our market capitalization. Therefore, we concluded that it remains more-likely-than-not that the Jackup reporting unit was not impaired.

The estimates used to determine the fair value of the Floaters reporting unit reflect management's best estimates, and we believe they are reasonable. Future declines in the Floaters reporting unit's operating performance or our anticipated business outlook may reduce the estimated fair value of our Floaters reporting unit and result in additional impairments. Factors that could have a negative impact on the fair value of the Floaters reporting unit include, but are not limited to:

• decreases in estimated market day rates and utilization due to greater-than-expected market pressures, downtime and other risks associated with offshore rig operations;

• sustained declines in our stock price;

• decreases in revenue due to our inability to attract and retain skilled personnel;

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

• 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;

• possible cancellation or suspension of drilling contracts as a result of mechanical difficulties, performance or other reasons;

• delays in contract commencement dates;

• the outcome of litigation, legal proceedings, investigations or other claims or contract disputes resulting in significant cash outflows;

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

• increases in the market-participant risk-adjusted WACC;

• declines in anticipated growth rates.

Adverse changes in one or more of these factors could result in additional goodwill impairments in future periods.

Drilling Contract Intangibles

In connection with the Pride acquisition, we recorded intangible assets and liabilities representing the estimated fair values of the acquired company's firm drilling contracts in place at the date of acquisition with favorable or unfavorable contract terms as compared to then-current market day rates for comparable drilling rigs.

The gross carrying amounts of our drilling contract intangibles, which we consider to be definite-lived intangibles assets and intangible liabilities, and accumulated amortization as of December 31, 2014 and 2013 were as follows (in millions):

	December 31, 2014								December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount			Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Drilling contract intangible assets
Balance, beginning of period	$	209.0	$	(130.6	)	$	78.4		$	209.0	$	(88.3	)	$	120.7
Amortization	—		(32.7		)	(32.7		)	—		(42.3		)	(42.3		)
Balance, end of period	$	209.0	$	(163.3	)	$	45.7		$	209.0	$	(130.6	)	$	78.4
Drilling contract intangible liabilities
Balance, beginning of period	$	278.0	$	(208.9	)	$	69.1		$	278.0	$	(160.0	)	$	118.0
Amortization	—		(28.4		)	(28.4		)	—		(48.9		)	(48.9		)
Balance, end of period	$	278.0	$	(237.3	)	$	40.7		$	278.0	$	(208.9	)	$	69.1

The various factors considered in the determination of the fair values of our drilling contract intangibles were (1) the contracted day rate for each contract, (2) the remaining term of each contract, (3) the rig class and (4) the market conditions for each respective rig class at the date of acquisition.  The intangible assets and liabilities were calculated based on the present value of the difference in cash inflows over the remaining contract term as compared to a hypothetical contract with the same remaining term at an estimated then-current market day rate using a risk-adjusted discount rate and an estimated effective income tax rate.  

We amortize the drilling contract intangibles to operating revenues over the respective remaining drilling contract terms on a straight-line basis. The estimated net (reduction) increase to future operating revenues related to the amortization of these intangible assets and liabilities as of December 31, 2014, is as follows (in millions):

2015	$	(4.5	)
2016	(.8		)
2017	.3
Total	$	(5.0	)

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Discontinued Operations

12 Months Ended

Dec. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

DISCONTINUED OPERATIONS

We sold the following rigs during the three-year period ended December 31, 2014 (in millions):

Rig(3)	Date of Rig Sale	Segment(1)	Net Proceeds		Net Book Value(2)		Pre-tax Gain/(Loss)
ENSCO 5000	December 2014	Floaters	$	1.3	$	.5	$	.8
ENSCO 93	September 2014	Jackups	51.7		52.9		(1.2		)
ENSCO 85	April 2014	Jackups	64.4		54.1		10.3
ENSCO 69 & Pride Wisconsin	January 2014	Jackups	32.2		8.6		23.6
Pride Pennsylvania	March 2013	Jackups	15.5		15.7		(.2		)
ENSCO 5003	December 2012	Floaters	68.2		89.4		(21.2		)
Pride Hawaii	October 2012	Jackups	18.8		16.8		2.0
ENSCO I	September 2012	Other	4.5		12.3		(7.8		)
ENSCO 61	June 2012	Jackups	31.7		19.6		12.1
ENSCO 59	May 2012	Jackups	22.8		21.9		.9
			$	311.1	$	291.8	$	19.3

⁽¹⁾ The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and were previously included within the operating segment noted in the above table.

⁽²⁾ Includes the rig's net book value as well as inventory and other assets on the date of the sale.

⁽³⁾ In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which are contracted to Pemex. As described below, the loss on sale and operating results of ENSCO 93 were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

During 2014, management committed to a plan to sell six floaters and two jackups. ENSCO 5000, ENSCO 5001, ENSCO 5002, ENSCO 6000, ENSCO 7500, ENSCO DS-2, ENSCO 58 and ENSCO 90 were removed from our portfolio of rigs marketed for contract drilling services. These rigs were written down to fair value, less costs to sell. We recorded a non-cash loss on impairment totaling $1.2 billion, net of tax benefits of $83.5 million, during the year ended December 31, 2014. The impairment charge was included in (loss) income from discontinued operations, net in our consolidated statement of operations for the year ended December 31, 2014.

We completed the sale of ENSCO 5000 for net proceeds of $1.3 million in December 2014. The remaining five floaters and two jackups are being actively marketed for sale and were classified as "held for sale" on our December 31, 2014 consolidated balance sheet.

The operating results from these rigs were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

During 2014, we sold ENSCO 93, a jackup contracted to Pemex. In connection with this sale, we executed a charter agreement with the purchaser to continue operating the rig for the remainder of the Pemex contract, which had an anticipated completion date in late 2015. Based on market developments during the fourth quarter, we now expect that the ENSCO 93 charter agreement will terminate prior to September 30, 2015. As a result, the loss on sale of $1.2 million and ENSCO 93 operating results were reclassified to (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014. Net proceeds from the sale of $51.7 million were included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2014. See "Note 12 - Sale-leaseback" for additional information.

During 2014, we sold ENSCO 85 for net proceeds of $64.4 million and ENSCO 69 and Pride Wisconsin for net proceeds of $32.2 million. The operating results of these rigs were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014. The net proceeds from the sale for ENSCO 69 and Pride Wisconsin were received in December 2013 and included in investing activities of discontinued operations in our consolidated statement of cash flows for the year ended December 31, 2013.

During 2012, we classified jackup rig Pride Pennsylvania as held for sale, and the rig was written down to fair value less estimated cost to sell. We recognized a $2.5 million loss for assets classified as held for sale during the year ended December 31, 2012.

The following table summarizes (loss) income from discontinued operations for each of the years in the three-year period ended December 31, 2014 (in millions):

	2014			2013			2012
Revenues	$	325.0		$	596.4		$	668.6
Operating expenses	372.0			577.6			544.3
Operating (loss) income	(47.0		)	18.8			124.3
Other income	—			.3			1.3
Income tax expense	(30.7		)	(20.2		)	(8.5		)
Loss on impairment, net	(1,158.8		)	—			—
Gain (loss) on disposal of discontinued operations, net	37.3			(1.1		)	(16.5		)
(Loss) income from discontinued operations	$	(1,199.2	)	$	(2.2	)	$	100.6

Debt and interest expense are not allocated to our discontinued operations.

During 2008, ENSCO 74 was lost as a result of Hurricane Ike in the U.S. Gulf of Mexico. The owner of a pipeline filed claims alleging that ENSCO 74 caused the pipeline to rupture during Hurricane Ike. We incurred $3.6 million in professional fees in connection with this matter, which we applied against our $10.0 million per occurrence deductible under our liability insurance policy.

In February 2014, we reached an agreement with the owner of the pipeline to settle the claims for $9.6 million. Accordingly, we recorded a $6.4 million charge for our remaining obligation under our liability insurance policy in loss from discontinued operations in our consolidated statement of operations for the year ended December 31, 2013. The remaining $3.2 million was settled by our underwriters. See "Note 11 - Commitments and Contingencies" for additional information on the ENSCO 74 loss.

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Income Taxes (Narrative) (Details) (USD $)	1 Months Ended		3 Months Ended				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014 jackup	Dec. 31, 2013 jackup	Dec. 31, 2012 jackup
Income Tax Expense (Benefit), Discrete Item							$ 18,400,000
Income from continuing operations before income taxes in the U.S. countries							(460,300,000)	173,400,000	101,100,000
Income from continuing operations before income taxes in the non-U.S. countries							(2,088,500,000)	1,500,000,000	1,203,600,000
Deferred tax assets related to U.S. foreign tax credits	159,000,000		98,600,000				98,600,000	159,000,000
Deferred tax assets related to net operating loss carryforwards	104,000,000		204,500,000				204,500,000	104,000,000
Net operating loss carryforwards			814,500,000				814,500,000
Operating loss carryforwards, Not subject to expiration			459,500,000				459,500,000
Operating loss carryforwards, Subject to expiration			355,000,000				355,000,000
Valuation allowance on NOL carryforwards and FTC			267,500,000				267,500,000
Proceeds from Income Tax Refunds							9,600,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	7,000,000						41,400,000
Asset Impairment Charges			3,515,200,000	0	703,500,000	0	4,218,700,000	0	0
Consilidated effective income tax rate excluding discrete items							10.70%	12.20%	12.40%
Restructuring Charges, Tax									51,200,000
Minimum percentage threshold for recognition of tax benefits							50.00%
Total unrecognized tax benefits	151,700,000	110,700,000	134,400,000				134,400,000	151,700,000	110,700,000
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions With Net Operating Loss Carryforwards							18,500,000	21,000,000
Amount of unrecognized tax benefits affecting the consolidated effective income tax rate if recognized			110,400,000				110,400,000
Amount of accrued interest and penalties included in other liabilities	17,300,000		26,500,000				26,500,000	17,300,000
Amount of interest and penalties recognized in net tax expense							(9,200,000)	1,600,000	2,800,000
Income tax benefits, inclusive of interest and penalties due to lapses in statute of limitations	3,100,000	28,600,000	2,400,000				2,400,000	3,100,000	28,600,000
Decline in unrecognized tax benefits during next twelve months			9,600,000				9,600,000
Accrued interest and penalty assessments related to the decline in unrecognized tax benefits			2,800,000				2,800,000
Number of assets transferred (in drillships or jackups)							3	2	1
Income tax liability from gain on intercompany transfers		1,700,000	0				0		1,700,000
Remaining useful life of drilling rigs associated with amortization of deferred income tax expense, minimum years							15 years
Unamortized deferred charges related to intercompany transfers	50,200,000		39,700,000				39,700,000	50,200,000
Amount included in current income taxes for amortization of deferred income taxes related to intercompany transfers							2,600,000	4,100,000	9,100,000
Deferred tax liability related to temporary difference from transferred drilling rigs	29,200,000		23,000,000				23,000,000	29,200,000
Tax benefits included in deferred income tax expense related to amortization of deferred reversing temporary differences from intercompany transfers							4,800,000	1,900,000	3,400,000
Aggregate Indefinitely reinvested undistributed subsidiary earnings.		530,000,000
Undistributed Earnings of Foreign Subsidiaries	2,100,000,000		2,300,000,000				2,300,000,000	2,100,000,000
Other Liabilities [Member]
Total unrecognized tax benefits	130,700,000		115,900,000				115,900,000	130,700,000
Minimum [Member]
Deferred Tax Assets, Foreign, Expiration Date							2017
Operating loss carryforwards tax credits expiration year							2015
Maximum [Member]
Deferred Tax Assets, Foreign, Expiration Date							2023
Operating loss carryforwards tax credits expiration year							2020
Mexican Tax Authority [Member]
Deferred Tax Liabilities, Gross								7,400,000
Proceeds from Income Tax Refunds								30,600,000
Rig Impairments [Member]
Income Tax Expense (Benefit), Discrete Item							$ 16,400,000

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Supplemental Financial Information (Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Supplemental Financial Information [Abstract]
Derivative Instruments	$ 8.0	$ 20.6
Other	3.9	(2.4)
Accumulated other comprehensive income	$ 11.9	$ 18.2

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Income Taxes (Summary Of Significant Components Of Deferred Income Tax Assets (Liabilities)) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Foreign tax credits	$ 98.6	$ 159.0
Premium on long-term debt	99.2	111.9
Net operating loss carryfowards	204.5	104.0
Employee benefits, including share-based compensation	39.5	41.7
Deferred revenue	103.0	19.4
Other	16.7	19.8
Total deferred tax assets	561.5	455.8
Valuation allowance	(271.3)	(232.6)
Net deferred tax assets	290.2	223.2
Property and equipment	(314.2)	(453.6)
Intercompany transfers of property	(23.0)	(29.2)
Deferred costs	(20.2)	(11.4)
Other	(14.1)	(24.0)
Total deferred tax liabilities	(371.5)	(518.2)
Net deferred tax liability	(81.3)	(295.0)
Net current deferred tax asset	41.4	20.9
Net noncurrent deferred tax liability	$ (122.7)	$ (315.9)

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Goodwill and Other Intangible Assets and Liabilities (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 16, 2014	Sep. 30, 2014	May 31, 2014	Dec. 31, 2012
Goodwill [Line Items]
Asset Impairment Charges, Assumptions Used, Weighted Average Capital Cost	11.00%
Goodwill, Gross					$ 3,100.0
Price Per Barrel	55			95
Goodwill	276.1	3,274.0
Drilling contract intangible assets, Gross Carrying Amount	209.0	209.0				209.0
Intangible Assets, Accumulated Amortization [Roll Forward]
Balance, beginning of period	(130.6)	(88.3)
Amortization	(32.7)	(42.3)
Balance, end of period	(163.3)	(130.6)
Intangible Assets, Net Carrying Amount [Roll Forward]
Balance, beginning of period	78.4	120.7
Amortization	(32.7)	(42.3)
Balance, end of period	45.7	78.4
Drilling contract intangible liabilities, Gross Carrying Amount	278.0	278.0				278.0
Intangible Liabilities, Accumulated Amortization [Roll Forward]
Balance, beginning of period	(208.9)	(160.0)
Amortization	(28.4)	(48.9)
Balance, end of period	(237.3)	(208.9)
Intangible Liabilities, Net Carrying Amount [Roll Forward]
Balance, beginning of period	69.1	118.0
Amortization	(28.4)	(48.9)
Balance, end of period	40.7	69.1
Finite-Lived Intangible Assets, Net, Amortization Income (Expense), Fiscal Year Maturity [Abstract]
2014	(4.5)
2015	(0.8)
2016	0.3
Total	(5.0)
Share Price			$ 25.88
Asset Impairment Charges, Assumptions Used, Terminal Growth Rate	3.00%
Floaters [Member]
Goodwill [Line Items]
Goodwill, Gross	3,081.4	3,081.4				3,081.4
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount					7.00%
Goodwill	83.5	3,081.4				3,081.4
Finite-Lived Intangible Assets, Net, Amortization Income (Expense), Fiscal Year Maturity [Abstract]
Goodwill, Impaired, Accumulated Impairment Loss	(2,997.9)	0				0
Jackups [Member]
Goodwill [Line Items]
Goodwill, Gross	192.6	192.6				192.6
Goodwill	192.6	192.6				192.6
Finite-Lived Intangible Assets, Net, Amortization Income (Expense), Fiscal Year Maturity [Abstract]
Goodwill, Impaired, Accumulated Impairment Loss	$ 0	$ 0				$ 0
Minimum [Member]
Finite-Lived Intangible Assets, Net, Amortization Income (Expense), Fiscal Year Maturity [Abstract]
Share Price During The Period	$ 25.88
Asset Impairment Charges, Assumptions Used, Price-To-Earnings Multiple	6.0
Maximum [Member]
Finite-Lived Intangible Assets, Net, Amortization Income (Expense), Fiscal Year Maturity [Abstract]
Share Price During The Period	$ 41.99
Asset Impairment Charges, Assumptions Used, Price-To-Earnings Multiple	6.75
Weighted Average [Member]
Finite-Lived Intangible Assets, Net, Amortization Income (Expense), Fiscal Year Maturity [Abstract]
Share Price	$ 35.23

XML

Guarantee Of Registered Securities (Condensed Consolidating Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Guarantor Obligations [Line Items]
Cash and cash equivalents	$ 664.8	$ 165.6	$ 487.1	$ 430.7
Short-term Investments	757.3	50.0
Accounts receivable	883.3	855.7
Accounts receivable from affiliates	0	0
Other	629.4	463.9
Total current assets	2,934.8	1,535.2
PROPERTY AND EQUIPMENT, AT COST	14,975.5	17,498.5
Less accumulated depreciation	2,440.7	3,187.5
Property and equipment, net	12,534.8	14,311.0	13,145.6
GOODWILL	276.1	3,274.0
DUE FROM AFFILIATES	0	0
INVESTMENTS IN AFFILIATES	0	0
OTHER ASSETS, NET	314.2	352.7
TOTAL ASSETS	16,059.9	19,472.9
Accounts payable and accrued liabilities	1,069.8	999.8
Accounts payable to affiliates	0	0
Current maturities of long-term debt	34.8	47.5
Total current liabilities	1,104.6	1,047.3
DUE TO AFFILIATES	0	0
LONG-TERM DEBT	5,885.6	4,718.9
DEFERRED INCOME TAXES	179.5	362.1
OTHER LIABILITIES	667.3	545.7
ENSCO SHAREHOLDERS' EQUITY	8,215.0	12,791.6
NONCONTROLLING INTERESTS	7.9	7.3
Total equity	8,222.9	12,798.9
Total liabilities and shareholders' equity	16,059.9	19,472.9
Ensco Plc [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	287.4	46.5	271.8	236.6
Short-term Investments	712.0	0
Accounts receivable	0	0
Accounts receivable from affiliates	34.5	1,235.0
Other	4.1	3.2
Total current assets	1,038.0	1,284.7
PROPERTY AND EQUIPMENT, AT COST	2.1	2.1
Less accumulated depreciation	1.7	1.5
Property and equipment, net	0.4	0.6
GOODWILL	0	0
DUE FROM AFFILIATES	2,873.2	4,876.8
INVESTMENTS IN AFFILIATES	9,084.8	13,830.1
OTHER ASSETS, NET	17.0	8.8
TOTAL ASSETS	13,013.4	20,001.0
Accounts payable and accrued liabilities	47.8	31.5
Accounts payable to affiliates	23.5	3,666.1
Current maturities of long-term debt	0	0
Total current liabilities	71.3	3,697.6
DUE TO AFFILIATES	994.8	1,030.8
LONG-TERM DEBT	3,724.4	2,473.7
DEFERRED INCOME TAXES	0	0
OTHER LIABILITIES	0	0
ENSCO SHAREHOLDERS' EQUITY	8,222.9	12,798.9
NONCONTROLLING INTERESTS	0	0
Total equity	8,222.9	12,798.9
Total liabilities and shareholders' equity	13,013.4	20,001.0
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	0	0.5	1.7	0
Short-term Investments	0	0
Accounts receivable	0	0
Accounts receivable from affiliates	210.4	213.8
Other	86.9	61.3
Total current assets	297.3	275.6
PROPERTY AND EQUIPMENT, AT COST	71.5	34.3
Less accumulated depreciation	34.1	26.5
Property and equipment, net	37.4	7.8
GOODWILL	0	0
DUE FROM AFFILIATES	4,748.2	4,236.0
INVESTMENTS IN AFFILIATES	1,233.5	4,868.6
OTHER ASSETS, NET	47.4	60.1
TOTAL ASSETS	6,363.8	9,448.1
Accounts payable and accrued liabilities	42.8	9.1
Accounts payable to affiliates	158.3	549.7
Current maturities of long-term debt	0	0
Total current liabilities	201.1	558.8
DUE TO AFFILIATES	3,817.4	2,760.4
LONG-TERM DEBT	149.2	149.1
DEFERRED INCOME TAXES	176.8	358.3
OTHER LIABILITIES	6.1	2.3
ENSCO SHAREHOLDERS' EQUITY	2,013.2	5,619.2
NONCONTROLLING INTERESTS	0	0
Total equity	2,013.2	5,619.2
Total liabilities and shareholders' equity	6,363.8	9,448.1
Pride International Inc. [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	90.8	4.9	85.0	22.6
Short-term Investments	0	0
Accounts receivable	0	0
Accounts receivable from affiliates	0	5.5
Other	0	0
Total current assets	90.8	10.4
PROPERTY AND EQUIPMENT, AT COST	0	0
Less accumulated depreciation	0	0
Property and equipment, net	0	0
GOODWILL	0	0
DUE FROM AFFILIATES	1,835.0	1,898.0
INVESTMENTS IN AFFILIATES	461.6	4,092.2
OTHER ASSETS, NET	0	0
TOTAL ASSETS	2,387.4	6,000.6
Accounts payable and accrued liabilities	34.3	34.2
Accounts payable to affiliates	0	0
Current maturities of long-term debt	0	0
Total current liabilities	34.3	34.2
DUE TO AFFILIATES	1,547.7	1,331.1
LONG-TERM DEBT	1,973.2	2,007.8
DEFERRED INCOME TAXES	0	0
OTHER LIABILITIES	7.0	8.7
ENSCO SHAREHOLDERS' EQUITY	(1,174.8)	2,618.8
NONCONTROLLING INTERESTS	0	0
Total equity	(1,174.8)	2,618.8
Total liabilities and shareholders' equity	2,387.4	6,000.6
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	286.6	113.7	128.6	171.5
Short-term Investments	45.3	50.0
Accounts receivable	883.3	855.7
Accounts receivable from affiliates	134.6	4,169.2
Other	538.4	399.4
Total current assets	1,888.2	5,588.0
PROPERTY AND EQUIPMENT, AT COST	14,901.9	17,462.1
Less accumulated depreciation	2,404.9	3,159.5
Property and equipment, net	12,497.0	14,302.6
GOODWILL	276.1	3,274.0
DUE FROM AFFILIATES	6,308.8	5,069.7
INVESTMENTS IN AFFILIATES	0	0
OTHER ASSETS, NET	249.8	283.8
TOTAL ASSETS	21,219.9	28,518.1
Accounts payable and accrued liabilities	944.9	925.0
Accounts payable to affiliates	197.7	1,407.7
Current maturities of long-term debt	34.8	47.5
Total current liabilities	1,177.4	2,380.2
DUE TO AFFILIATES	9,405.3	10,958.2
LONG-TERM DEBT	38.8	88.3
DEFERRED INCOME TAXES	2.7	3.8
OTHER LIABILITIES	654.2	534.7
ENSCO SHAREHOLDERS' EQUITY	9,933.6	14,545.6
NONCONTROLLING INTERESTS	7.9	7.3
Total equity	9,941.5	14,552.9
Total liabilities and shareholders' equity	21,219.9	28,518.1
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	0	0	0	0
Short-term Investments	0	0
Accounts receivable	0	0
Accounts receivable from affiliates	(379.5)	(5,623.5)
Other	0	0
Total current assets	(379.5)	(5,623.5)
PROPERTY AND EQUIPMENT, AT COST	0	0
Less accumulated depreciation	0	0
Property and equipment, net	0	0
GOODWILL	0	0
DUE FROM AFFILIATES	(15,765.2)	(16,080.5)
INVESTMENTS IN AFFILIATES	(10,779.9)	(22,790.9)
OTHER ASSETS, NET	0	0
TOTAL ASSETS	(26,924.6)	(44,494.9)
Accounts payable and accrued liabilities	0	0
Accounts payable to affiliates	(379.5)	(5,623.5)
Current maturities of long-term debt	0	0
Total current liabilities	(379.5)	(5,623.5)
DUE TO AFFILIATES	(15,765.2)	(16,080.5)
LONG-TERM DEBT	0	0
DEFERRED INCOME TAXES	0	0
OTHER LIABILITIES	0	0
ENSCO SHAREHOLDERS' EQUITY	(10,779.9)	(22,790.9)
NONCONTROLLING INTERESTS	0	0
Total equity	(10,779.9)	(22,790.9)
Total liabilities and shareholders' equity	$ (26,924.6)	$ (44,494.9)

XML

Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Capital Commitments

The following table summarizes the cumulative amount of contractual payments made as of December 31, 2014 for our rigs under construction and estimated timing of our remaining contractual payments (in millions): 

	Cumulative Paid(1)		2015		2016		2017		Total(2)
ENSCO DS-8	161.4		384.4		—		—		545.8
ENSCO DS-9	157.4		375.0		—		—		532.4
ENSCO DS-10	206.0		310.3		—		—		516.3
ENSCO 110	41.0		166.2		—		—		207.2
ENSCO 123	53.5		—		217.0		—		270.5
ENSCO 140	78.4		78.9		39.2		—		196.5
ENSCO 141	39.2		38.7		117.6		—		195.5
	$	736.9	$	1,353.5	$	373.8	$	—	$	2,464.2

⁽¹⁾ Cumulative paid represents the aggregate amount of contractual payments made from commencement of the construction agreement through December 31, 2014.

⁽²⁾ Total commitments are based on fixed-price shipyard construction contracts, exclusive of costs associated with commissioning, systems integration testing, project management and capitalized interest.

XML

Debt (Aggregate Maturities Of Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Debt Instruments [Abstract]
2013	$ 34.8
2014	1,019.7
2015	4.5
2016	4.5
2017	504.5
Thereafter	4,104.5
Total	$ 5,672.5

XML

Guarantee Of Registered Securities

12 Months Ended

Dec. 31, 2014

Guarantees [Abstract]

Guarantee Of Registered Securities

GUARANTEE OF REGISTERED SECURITIES

In connection with the Pride acquisition, 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% senior notes due 2019, 6.875% senior notes due 2020 and 7.875% senior notes due 2040, which had an aggregate outstanding principal balance of $1.7 billion as of December 31, 2014. 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 is also 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 December 31, 2014.

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 our condensed consolidating statements of operations for each of the years in the three-year period ended December 31, 2014; our condensed consolidating statements of comprehensive (loss) income for each of the years in the three-year period ended December 31, 2014; our condensed consolidating balance sheets as of December 31, 2014 and 2013; and our condensed consolidating statements of cash flows for each of the years in the three-year period ended December 31, 2014, in accordance with Rule 3-10 of Regulation S-X. 

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2014 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	34.5		$	145.4		$	—		$	4,683.0		$	(298.4	)	$	4,564.5
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	31.8			145.4			—			2,198.1			(298.4		)	2,076.9
Loss on impairment	—			—			—			4,218.7			—			4,218.7
Depreciation	.2			7.6			—			530.1			—			537.9
General and administrative	52.0			.4			—			79.5			—			131.9
OPERATING (LOSS) INCOME	(49.5		)	(8.0		)	—			(2,343.4		)	—			(2,400.9		)
OTHER (EXPENSE) INCOME, NET	(67.0		)	(43.3		)	(54.7		)	17.1			—			(147.9		)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(116.5		)	(51.3		)	(54.7		)	(2,326.3		)	—			(2,548.8		)
INCOME TAX (BENEFIT) EXPENSE	—			(44.9		)	—			185.4			—			140.5
DISCONTINUED OPERATIONS, NET	—			—			—			(1,199.2		)	—			(1,199.2		)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	(3,786.1		)	(3,651.0		)	(3,744.3		)	—			11,181.4			—
NET LOSS	(3,902.6		)	(3,657.4		)	(3,799.0		)	(3,710.9		)	11,181.4			(3,888.5		)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(14.1		)	—			(14.1		)
NET LOSS ATTRIBUTABLE TO ENSCO	$	(3,902.6	)	$	(3,657.4	)	$	(3,799.0	)	$	(3,725.0	)	$	11,181.4		$	(3,902.6	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2013 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	35.0		$	149.4		$	—		$	4,446.4		$	(307.4	)	$	4,323.4
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	27.5			149.4			—			2,077.6			(307.4		)	1,947.1
Depreciation	.3			4.0			—			491.9			—			496.2
General and administrative	63.5			.5			—			82.8			—			146.8
OPERATING (LOSS) INCOME	(56.3		)	(4.5		)	—			1,794.1			—			1,733.3
OTHER (EXPENSE) INCOME, NET	(65.6		)	(9.4		)	(27.9		)	2.8			—			(100.1		)
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(121.9		)	(13.9		)	(27.9		)	1,796.9			—			1,633.2
INCOME TAX EXPENSE	—			92.5			—			110.6			—			203.1
DISCONTINUED OPERATIONS, NET	—			—			—			(2.2		)	—			(2.2		)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,540.1			366.2			111.6			—			(2,017.9		)	—
NET INCOME	1,418.2			259.8			83.7			1,684.1			(2,017.9		)	1,427.9
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(9.7		)	—			(9.7		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	1,418.2		$	259.8		$	83.7		$	1,674.4		$	(2,017.9	)	$	1,418.2

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Year Ended December 31, 2012 (in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	44.0		$	147.6		$	—		$	3,767.3		$	(320.1	)	$	3,638.8
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	51.2			147.6			—			1,764.1			(320.1		)	1,642.8
Depreciation	.4			3.5			—			439.9			—			443.8
General and administrative	63.8			.4			—			84.7			—			148.9
OPERATING (LOSS) INCOME	(71.4		)	(3.9		)	—			1,478.6			—			1,403.3
OTHER (EXPENSE) INCOME, NET	(41.8		)	(7.0		)	(50.0		)	.2			—			(98.6		)
(LOSS) INCOME BEFORE INCOME TAXES	(113.2		)	(10.9		)	(50.0		)	1,478.8			—			1,304.7
INCOME TAX EXPENSE	—			68.8			—			159.8			—			228.6
DISCONTINUED OPERATIONS, NET	—			—			—			100.6						100.6
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,282.9			335.9			239.2			—			(1,858.0		)	—
NET INCOME	1,169.7			256.2			189.2			1,419.6			(1,858.0		)	1,176.7
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(7.0		)	—			(7.0		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	1,169.7		$	256.2		$	189.2		$	1,412.6		$	(1,858.0	)	$	1,169.7

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2014

(in millions)

	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments		Total
NET LOSS	$	(3,902.6	)	$	(3,657.4	)	$	(3,799.0	)	$	(3,710.9	)	$	11,181.4	$	(3,888.5	)
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	—			(11.7		)	—			—			—		(11.7		)
Reclassification of net gains on derivative instruments from other comprehensive income into net income	—			(.9		)	—			—			—		(.9		)
Other	—			—			—			6.3			—		6.3
NET OTHER COMPREHENSIVE (LOSS) INCOME	—			(12.6		)	—			6.3			—		(6.3		)
COMPREHENSIVE LOSS	(3,902.6		)	(3,670.0		)	(3,799.0		)	(3,704.6		)	11,181.4		(3,894.8		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(14.1		)	—		(14.1		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$	(3,902.6	)	$	(3,670.0	)	$	(3,799.0	)	$	(3,718.7	)	$	11,181.4	$	(3,908.9	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2013

(in millions)

	Ensco plc		ENSCO International Incorporated			Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	1,418.2	$	259.8		$	83.7	$	1,684.1		$	(2,017.9	)	$	1,427.9
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	—		(5.8		)	—		—			—			(5.8		)
Reclassification of net losses on derivative instruments from other comprehensive income into net income	—		2.0			—		—			—			2.0
Other	—		—			—		1.9			—			1.9
NET OTHER COMPREHENSIVE (LOSS) INCOME	—		(3.8		)	—		1.9			—			(1.9		)
COMPREHENSIVE INCOME	1,418.2		256.0			83.7		1,686.0			(2,017.9		)	1,426.0
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—			—		(9.7		)	—			(9.7		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	1,418.2	$	256.0		$	83.7	$	1,676.3		$	(2,017.9	)	$	1,416.3

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

Year Ended December 31, 2012

(in millions)

	Ensco plc		ENSCO International Incorporated		Pride International, Inc.		Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	1,169.7	$	256.2	$	189.2	$	1,419.6		$	(1,858.0	)	$	1,176.7
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	—		6.3		—		2.4			—			8.7
Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	—		.2		—		(.2		)	—			—
Other	—		—		—		2.8			—			2.8
NET OTHER COMPREHENSIVE INCOME	—		6.5		—		5.0			—			11.5
COMPREHENSIVE INCOME	1,169.7		262.7		189.2		1,424.6			(1,858.0		)	1,188.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—		—		—		(7.0		)	—			(7.0		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	1,169.7	$	262.7	$	189.2	$	1,417.6		$	(1,858.0	)	$	1,181.2

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2014 (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	$	287.4	$	—	$	90.8		$	286.6	$	—		$	664.8
Short-term investments	712.0		—		—			45.3		—			757.3
Accounts receivable, net	—		—		—			883.3		—			883.3
Accounts receivable from   affiliates	34.5		210.4		—			134.6		(379.5		)	—
Other	4.1		86.9		—			538.4		—			629.4
Total current assets	1,038.0		297.3		90.8			1,888.2		(379.5		)	2,934.8
PROPERTY AND EQUIPMENT, AT COST	2.1		71.5		—			14,901.9		—			14,975.5
Less accumulated depreciation	1.7		34.1		—			2,404.9		—			2,440.7
Property and equipment, net	.4		37.4		—			12,497.0		—			12,534.8
GOODWILL	—		—		—			276.1		—			276.1
DUE FROM AFFILIATES	2,873.2		4,748.2		1,835.0			6,308.8		(15,765.2		)	—
INVESTMENTS IN AFFILIATES	9,084.8		1,233.5		461.6			—		(10,779.9		)	—
OTHER ASSETS, NET	17.0		47.4		—			249.8		—			314.2
	$	13,013.4	$	6,363.8	$	2,387.4		$	21,219.9	$	(26,924.6	)	$	16,059.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued      liabilities	$	47.8	$	42.8	$	34.3		$	944.9	$	—		$	1,069.8
Accounts payable to affiliates	23.5		158.3		—			197.7		(379.5		)	—
Current maturities of long-term   debt	—		—		—			34.8		—			34.8
Total current liabilities	71.3		201.1		34.3			1,177.4		(379.5		)	1,104.6
DUE TO AFFILIATES	994.8		3,817.4		1,547.7			9,405.3		(15,765.2		)	—
LONG-TERM DEBT	3,724.4		149.2		1,973.2			38.8		—			5,885.6
DEFERRED INCOME TAXES	—		176.8		—			2.7		—			179.5
OTHER LIABILITIES	—		6.1		7.0			654.2		—			667.3
ENSCO SHAREHOLDERS' EQUITY (DEFICIT)	8,222.9		2,013.2		(1,174.8		)	9,933.6		(10,779.9		)	8,215.0
NONCONTROLLING INTERESTS	—		—		—			7.9		—			7.9
Total equity	8,222.9		2,013.2		(1,174.8		)	9,941.5		(10,779.9		)	8,222.9
	$	13,013.4	$	6,363.8	$	2,387.4		$	21,219.9	$	(26,924.6	)	$	16,059.9

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2013 (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	$	46.5	$	.5	$	4.9	$	113.7	$	—		$	165.6
Short-term investments	—		—		—		50.0		—			50.0
Accounts receivable, net	—		—		—		855.7		—			855.7
Accounts receivable from   affiliates	1,235.0		213.8		5.5		4,169.2		(5,623.5		)	—
Other	3.2		61.3		—		399.4		—			463.9
Total current assets	1,284.7		275.6		10.4		5,588.0		(5,623.5		)	1,535.2
PROPERTY AND EQUIPMENT, AT COST	2.1		34.3		—		17,462.1		—			17,498.5
Less accumulated depreciation	1.5		26.5		—		3,159.5		—			3,187.5
Property and equipment, net	.6		7.8		—		14,302.6		—			14,311.0
GOODWILL	—		—		—		3,274.0		—			3,274.0
DUE FROM AFFILIATES	4,876.8		4,236.0		1,898.0		5,069.7		(16,080.5		)	—
INVESTMENTS IN AFFILIATES	13,830.1		4,868.6		4,092.2		—		(22,790.9		)	—
OTHER ASSETS, NET	8.8		60.1		—		283.8		—			352.7
	$	20,001.0	$	9,448.1	$	6,000.6	$	28,518.1	$	(44,494.9	)	$	19,472.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued      liabilities	$	31.5	$	9.1	$	34.2	$	925.0	$	—		$	999.8
Accounts payable to affiliates	3,666.1		549.7		—		1,407.7		(5,623.5		)	—
Current maturities of long-term   debt	—		—		—		47.5		—			47.5
Total current liabilities	3,697.6		558.8		34.2		2,380.2		(5,623.5		)	1,047.3
DUE TO AFFILIATES	1,030.8		2,760.4		1,331.1		10,958.2		(16,080.5		)	—
LONG-TERM DEBT	2,473.7		149.1		2,007.8		88.3		—			4,718.9
DEFERRED INCOME TAXES	—		358.3		—		3.8		—			362.1
OTHER LIABILITIES	—		2.3		8.7		534.7		—			545.7
ENSCO SHAREHOLDERS' EQUITY	12,798.9		5,619.2		2,618.8		14,545.6		(22,790.9		)	12,791.6
NONCONTROLLING INTERESTS	—		—		—		7.3		—			7.3
Total equity	12,798.9		5,619.2		2,618.8		14,552.9		(22,790.9		)	12,798.9
	$	20,001.0	$	9,448.1	$	6,000.6	$	28,518.1	$	(44,494.9	)	$	19,472.9

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 2014 (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      operatingactivities of continuing operations	$	(63.8	)	$	(167.6	)	$	(90.9	)	$	2,380.2		$	—	$	2,057.9
INVESTING ACTIVITIES
Additions to property and equipment	—			(37.2		)	—			(1,531.6		)	—		(1,568.8		)
Purchases of short-term investments	(716.1		)	—			—			(74.5		)	—		(790.6		)
Net proceeds from disposition of assets	—			—			—			169.2			—		169.2
Maturities of short-term investments	—			—			—			83.3			—		83.3
Net cash used in investing activities of continuing operations	(716.1		)	(37.2		)	—			(1,353.6		)	—		(2,106.9		)
FINANCING ACTIVITIES
Proceeds from debt issuance	1,246.4			—			—			—			—		1,246.4
Cash dividends paid	(703.0		)	—			—			—			—		(703.0		)
Reduction of long-term   borrowings	—			—			—			(60.1		)	—		(60.1		)
Debt financing costs	(13.4		)	—			—			—			—		(13.4		)
Proceeds from exercise of share   options	2.6			—			—			—			—		2.6
Advances from (to) affiliates	501.9			204.3			176.8			(883.0		)	—		—
Other	(13.7		)	—			—			(16.1		)	—		(29.8		)
Net cash provided by (used in)          financing activities	1,020.8			204.3			176.8			(959.2		)	—		442.7
DISCONTINUED OPERATIONS
Operating activities	—			—			—			(3.8		)	—		(3.8		)
Investing activities	—			—			—			109.3			—		109.3
Net cash provided by discontinued operations	—			—			—			105.5			—		105.5
Effect of exchange rate changes on cash and cash equivalents	—			—			—			—			—		—
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	240.9			(0.5		)	85.9			172.9			—		499.2
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	46.5			0.5			4.9			113.7			—		165.6
CASH AND CASH EQUIVALENTS, END OF YEAR	$	287.4		$	—		$	90.8		$	286.6		$	—	$	664.8

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 2013 (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      operatingactivities of continuing operations	$	(114.8	)	$	(128.7	)	$	(62.9	)	$	2,117.6		$	—	$	1,811.2
INVESTING ACTIVITIES
Additions to property and   equipment	—			—			—			(1,763.5		)	—		(1,763.5		)
Purchases of short-term investments	—			—			—			(50.0		)	—		(50.0		)
Maturities of short-term investments	—			—			—			50.0			—		50.0
Net proceeds from disposition of assets	—			(4.1		)	—			10.1			—		6.0
Net cash used in investing activities of continuing operations	—			(4.1		)	—			(1,753.4		)	—		(1,757.5		)
FINANCING ACTIVITIES
Cash dividends paid	(525.6		)	—			—			—			—		(525.6		)
Reduction of long-term   borrowings	—			—			—			(47.5		)	—		(47.5		)
Proceeds from exercise of share   options	22.3			—			—			—			—		22.3
Debt financing costs	—			(4.6		)	—			—			—		(4.6		)
Advances from (to) affiliates	407.2			136.2			(17.2		)	(526.2		)	—		—
Other	(14.4		)	—			—			(7.3		)	—		(21.7		)
Net cash (used in) provided by          financing activities	(110.5		)	131.6			(17.2		)	(581.0		)	—		(577.1		)
DISCONTINUED OPERATIONS
Operating activities	—			—			—			169.3			—		169.3
Investing activities	—			—			—			32.8			—		32.8
Net cash provided by discontinued operations	—			—			—			202.1			—		202.1
Effect of exchange rate changes   on cash and cash equivalents	—			—			—			(.2		)	—		(.2		)
DECREASE IN CASH AND CASH EQUIVALENTS	(225.3		)	(1.2		)	(80.1		)	(14.9		)	—		(321.5		)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	271.8			1.7			85.0			128.6			—		487.1
CASH AND CASH EQUIVALENTS, END OF YEAR	$	46.5		$	.5		$	4.9		$	113.7		$	—	$	165.6

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Year Ended December 31, 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      operatingactivities of continuing operations	$	(71.6	)	$	(38.2	)	$	(21.6	)	$	2,086.0		$	—	$	1,954.6
INVESTING ACTIVITIES
Additions to property and equipment	—			—			—			(1,713.2		)	—		(1,713.2		)
Purchases of short-term investments	—			—			—			(90.0		)	—		(90.0		)
Maturities of short-term investments	—			—			—			44.5			—		44.5
Net proceeds from disposition of assets	(.3		)	.4			—			3.1			—		3.2
Net cash (used in) provided       by investing activities of       continuing operations	(.3		)	.4			—			(1,755.6		)	—		(1,755.5		)
FINANCING ACTIVITIES
Cash dividends paid	(348.1		)	—			—			—			—		(348.1		)
Commercial paper borrowings,   net	(125.0		)	—			—			—			—		(125.0		)
Equity issuance cost	66.7			—			—			—			—		66.7
Reduction of long-term borrowings	—			—			—			(47.5		)	—		(47.5		)
Proceeds from exercise of share options	23.9			11.9			—			—			—		35.8
Advances from (to) affiliates	501.2			27.6			84.0			(612.8		)	—		—
Other	(11.6		)	—			—			(5.8		)	—		(17.4		)
Net cash provided by (used in) financing activities	107.1			39.5			84.0			(666.1		)	—		(435.5		)
DISCONTINUED OPERATIONS
Operating activities	—			—			—			232.5			—		232.5
Investing activities	—			—			—			58.3			—		58.3
Net cash provided by discontinued operations	—			—			—			290.8			—		290.8
Effect of exchange rate changes on cash and cash equivalents	—			—			—			2.0			—		2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	35.2			1.7			62.4			(42.9		)	—		56.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	236.6			—			22.6			171.5			—		430.7
CASH AND CASH EQUIVALENTS, END        OF YEAR	$	271.8		$	1.7		$	85.0		$	128.6		$	—	$	487.1

XML

Property And Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Schedule Of Property And Equipment

Property and equipment as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Drilling rigs and equipment	$	13,253.2	$	15,839.0
Other	135.0		101.0
Work in progress	1,587.3		1,558.5
	$	14,975.5	$	17,498.5

XML

Debt (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014
Debt Instrument [Line Items]
Commercial paper	$ 0	$ 0
Gains (Losses) on Extinguishment of Debt	600,000
Net unamortized premiums	247,900,000
Interest Expense	161,400,000	158,800,000	123,600,000
Capitalized interest	78,200,000	67,700,000	105,800,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Commercial paper, capacity	2,250,000,000
Maximum days of maturity of notes	364
Weighted-average interest rate	0.26%	0.35%
Debentures Due 2027 [Member]
Debt Instrument [Line Items]
Unsecured debt instruments issued	150,000,000.0
Debt instrument interest rate stated percentage	7.20%
Debt Instrument, Redemption Price, Percentage	100.00%
ENSCO 7500 [Member] | Bonds Due 2015 And 2020 [Member]
Debt Instrument [Line Items]
Aggregate amount of unsecured debt instrument	190,000,000.0
Debt instrument maturity term, years	15
ENSCO 105 [Member] | Bonds Due 2015 And 2020 [Member]
Debt Instrument [Line Items]
Unsecured debt instruments issued	76,500,000
Debt instrument interest rate stated percentage	4.65%
Number of semiannual principal installments	34
Semiannual principal installment amount	2,300,000
Debt instrument maturity term, years	17
Four Point Five Percent Senior Notes Member [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.50%
Debt instrument maturity period	2024
Four Point Five Percent Senior Notes Member [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.50%
Aggregate amount of unsecured debt instrument	625,000,000
Discount to senior notes	850,000
Debt instrument maturity period	2024
Five Point Seven Five Percent Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	5.75%
Debt instrument maturity period	2044
Five Point Seven Five Percent Senior Notes [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	5.75%
Aggregate amount of unsecured debt instrument	625,000,000
Discount to senior notes	2,800,000
Debt instrument maturity period	2044
6.875% Senior notes due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	6.875%
Debt instrument maturity period	2020
6.875% Senior notes due 2020 [Member] | Acquired Debt [Member]
Debt Instrument [Line Items]
Unsecured debt instruments issued	900,000,000
Debt instrument interest rate stated percentage	6.875%
Debt instrument maturity period	2020
8.50% Senior notes due 2019 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	8.50%
Debt instrument maturity period	2019
8.50% Senior notes due 2019 [Member] | Acquired Debt [Member]
Debt Instrument [Line Items]
Unsecured debt instruments issued	500,000,000
Debt instrument interest rate stated percentage	8.50%
Debt instrument maturity period	2019
7.875% Senior notes due 2040 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	7.875%
Debt instrument maturity period	2040
7.875% Senior notes due 2040 [Member] | Acquired Debt [Member]
Debt Instrument [Line Items]
Unsecured debt instruments issued	300,000,000
Debt instrument interest rate stated percentage	7.875%
Debt instrument maturity period	2040
4.33% MARAD bonds due 2016 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.33%
Debt instrument maturity period	2016
4.33% MARAD bonds due 2016 [Member] | Acquired Debt [Member]
Debt Instrument [Line Items]
Unsecured debt instruments issued	151,500,000
3.25% Senior notes due 2016 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	3.25%
Debt instrument maturity period	2016
3.25% Senior notes due 2016 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	3.25%
Aggregate amount of unsecured debt instrument	1,000,000,000
Discount to senior notes	7,600,000
Debt instrument maturity period	2016
4.70% Senior notes due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.70%
Debt instrument maturity period	2021
4.70% Senior notes due 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.70%
Aggregate amount of unsecured debt instrument	1,500,000,000
Discount to senior notes	29,600,000
Debt instrument maturity period	2021
Five Year Credit Facility Member
Debt Instrument [Line Items]
Current borrowing capacity	2,250,000,000			2,000,000,000
Total facility fee commitment	0	0
Maximum amount of right to increase the commitment	2,750,000,000
Amounts outstanding	0	0
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0
Base Rate [Member] | Five Year Credit Facility Member
Debt Instrument [Line Items]
Basis spread on variable rate	0.125%
London Interbank Offered Rate (LIBOR) [Member] | Five Year Credit Facility Member
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	1.125%
Maximum [Member] | Five Year Credit Facility Member
Debt Instrument [Line Items]
Maximum percentage of debt to total capitalization ratio	50.00%

XML

Description Of The Business And Summary Of Significant Accounting Policies (Reconciliation Of The Weighted-Average Shares Used In Basic And Diluted Earnings Per Share Computations) (Details) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Description Of The Business And Summary Of Significant Accounting Policies [Abstract]
Weighted-average shares - basic	231.6	230.9	229.4
Potentially dilutive share options	0	0.2	0.3
Weighted-average shares - diluted	231.6	231.1	229.7

XML

Consolidated Balance Sheets (Parenthetical)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014 Class A Ordinary Shares, U.S. [Member] USD ($)	Dec. 31, 2013 Class A Ordinary Shares, U.S. [Member] USD ($)	Dec. 31, 2014 Common Class B, Par Value In GBP [Member] GBP (£)	Dec. 31, 2013 Common Class B, Par Value In GBP [Member] GBP (£)
Common shares, par value			$ 0.10	$ 0.10	£ 1	£ 1
Common shares, shares authorized			450,000,000	450,000,000.0	50,000	50,000
Common shares, shares issued			240,700,000	239,500,000	50,000	50,000
Treasury shares, shares held	6,500,000	6,000,000

XML

Supplemental Financial Information (Cash Paid For Interest And Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Financial Information [Abstract]
Interest, net of amounts capitalized	$ 170.0	$ 182.2	$ 150.7
Income taxes	$ 218.2	$ 195.4	$ 77.9

XML

Debt

12 Months Ended

Dec. 31, 2014

Debt Instruments [Abstract]

Debt

DEBT

The carrying value of long-term debt as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014			2013
4.70% Senior notes due 2021	$	1,479.9		$	1,477.2
6.875% Senior notes due 2020	1,008.2			1,024.8
3.25% Senior notes due 2016	998.0			996.5
4.50% Senior notes due 2024	624.2			—
5.75% Senior notes due 2044	622.3			—
8.50% Senior notes due 2019	583.8			600.5
7.875% Senior notes due 2040	381.2			382.6
7.20% Debentures due 2027	149.2			149.1
4.33% MARAD bonds due 2016	46.6			78.9
6.36% MARAD bonds due 2015	—			25.3
4.65% MARAD bonds due 2020	27.0			31.5
Total debt	5,920.4			4,766.4
Less current maturities	(34.8		)	(47.5		)
Total long-term debt	$	5,885.6		$	4,718.9

 Senior Notes

On September 29, 2014, we issued $625.0 million aggregate principal amount of unsecured 4.50% notes due 2024 at a discount of $850,000 and $625.0 million aggregate principal amount of unsecured 5.75% notes due 2044 (collectively the “2014 Notes”) at a discount of $2.8 million in a public offering. Interest on these notes is payable semiannually in April and October of each year commencing April 1, 2015.  The 2014 Notes were issued pursuant to an Indenture between us and Deutsche Bank Trust Company Americas, as trustee (the “Trustee”), dated March 17, 2011 (the "Indenture") and a Second Supplemental Indenture between us and the Trustee, dated September 29, 2014. The net proceeds from the sale of the 2014 Notes are being used for general corporate purposes. 

During 2011, we issued $1.0 billion aggregate principal amount of unsecured 3.25% notes due 2016 at a discount of $7.6 million and $1.5 billion aggregate principal amount of unsecured 4.70% notes due 2021 (collectively the “2011 Notes”) at a discount of $29.6 million in a public offering. Interest on these notes is payable semiannually in March and September of each year.  The 2011 Notes were issued pursuant to the Indenture, and a supplemental indenture between us and the Trustee, dated March 17, 2011. The net proceeds from the sale of the 2011 Notes were used to fund a portion of the cash consideration payable in connection with the Pride acquisition.

Upon consummation of the Pride acquisition during 2011, we assumed the acquired company's outstanding debt comprised of $900.0 million aggregate principal amount of 6.875% senior notes due 2020, $500.0 million aggregate principal amount of 8.5% senior notes due 2019 and $300.0 million aggregate principal amount of 7.875% senior notes due 2040 (the "Acquired Notes").  Under a supplemental indenture, Ensco plc has fully and unconditionally guaranteed the performance of all Pride obligations with respect to the Acquired Notes.  See "Note 15 - Guarantee of Registered Securities" for additional information on the guarantee of the Acquired Notes. 

We may redeem each series of the 2014 Notes in whole, at any time or in part from time to time, prior to maturity. If we elect to redeem the 2014 Notes due 2024 before the date that is three months prior to the maturity date or the 2014 Notes due 2044 before the date that is six months prior to the maturity date, we will pay an amount equal to 100% of the principal amount of the notes redeemed plus accrued and unpaid interest and a "make-whole" premium. If we elect to redeem the 2014 Notes on or after the aforementioned dates, we will pay an amount equal to 100% of the principal amount of the notes redeemed plus accrued and unpaid interest but we are not required to pay a "make-whole" premium. We may redeem each series of the 2011 Notes and the Acquired Notes, in whole or in part, at any time, at a price equal to 100% of their principal amount, plus accrued and unpaid interest and a "make-whole" premium.

The indentures governing the 2014 Notes, the 2011 Notes and the Acquired Notes contain customary events of default, including failure to pay principal or interest on such Notes when due, among others. The indentures governing the 2014 Notes, the 2011 Notes and the Acquired Notes also contain certain restrictions, including, among others, restrictions on our ability and the ability of our subsidiaries to create or incur secured indebtedness, enter into certain sale/leaseback transactions and enter into certain merger or consolidation transactions.

Debentures Due 2027

During 1997, Ensco Delaware issued $150.0 million of unsecured 7.20% Debentures due November 15, 2027 (the "Debentures") in a public offering. Interest on the Debentures is payable semiannually in May and November. We may redeem the Debentures, in whole or in part, at any time prior to maturity, at a price equal to 100% of their principal amount, plus accrued and unpaid interest and a "make-whole" premium. The Debentures are not subject to any sinking fund requirements. During 2009, in connection with the redomestication, Ensco plc entered into a supplemental indenture to unconditionally guarantee the principal and interest payments on the Debentures.

The Debentures and the indenture and the supplemental indentures pursuant to which the Debentures were issued, also contain customary events of default, including failure to pay principal or interest on the Debentures when due, among others. The indenture and the supplemental indentures contain certain restrictions, including, among others, restrictions on our ability and the ability of our subsidiaries to create or incur secured indebtedness, enter into certain sale/leaseback transactions and enter into certain merger or consolidation transactions.

MARAD Bonds Due 2016 and 2020

During 2001, a subsidiary of Ensco Delaware issued $190.0 million of 15-year bonds which are guaranteed by MARAD to provide long-term financing for ENSCO 7500. In December 2014, we fully redeemed the remaining outstanding principal of these bonds and incurred a "make-whole" payment of $600,000, and MARAD released all interests in ENSCO 7500.

During 2003, a subsidiary of Ensco Delaware issued $76.5 million of 17-year bonds which are guaranteed by MARAD to provide long-term financing for ENSCO 105. The bonds will be repaid in 34 equal semiannual principal installments of $2.3 million ending in October 2020. Interest on the bonds is payable semiannually, in April and October, at a fixed rate of 4.65%.

Ensco Delaware issued separate guaranties to MARAD, guaranteeing the performance of obligations under the bonds.  During 2010, the documents governing MARAD's guarantee commitments were amended to address certain changes arising from the redomestication and to include Ensco plc as an additional guarantor of the debt obligations of Ensco Delaware and its subsidiaries.

Upon consummation of the Pride acquisition, we assumed $151.5 million of MARAD bonds issued to provide long-term financing for ENSCO 6003 and ENSCO 6004. The bonds are guaranteed by MARAD and will be repaid in semiannual principal installments ending in 2016. Interest on the bonds is payable semiannually at a weighted average fixed rate of 4.33%.

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. During 2014, we increased the size of our program to permit the issuance of commercial paper notes in an aggregate principal amount not to exceed $2.25 billion at any time outstanding. Amounts issued under the commercial paper program are supported by the available and unused committed capacity under our credit facility. As a result, amounts issued under the commercial paper program are limited by the amount of our available and unused committed capacity under our credit facility. The proceeds of such financings may be used for capital expenditures and other general corporate purposes. The commercial paper bears interest at rates that vary based on market conditions and the ratings assigned by credit rating agencies at the time of issuance. The weighted-average interest rate on our commercial paper borrowings was 0.26% and 0.35% during 2014 and 2013, respectively.  Commercial paper maturities will vary but may not exceed 364 days from the date of issue. The commercial paper is not redeemable or subject to voluntary prepayment by us prior to maturity.  We had no amounts outstanding under our commercial paper program as of December 31, 2014 and 2013.

Revolving Credit Facility

On September 30, 2014, we entered into an amendment to the Fourth Amended and Restated Credit Agreement (the "Five-Year Credit Facility"), among Ensco, Citibank, N.A., as Administrative Agent, DNB Bank ASA, as Syndication Agent, and a syndicate of banks. This amendment extended the Five-Year Credit Facility maturity date from May 7, 2018 to September 30, 2019 and increased the total commitment of the lenders from $2.0 billion to $2.25 billion. As amended, the Five-Year Credit Facility provides for a $2.25 billion senior unsecured revolving credit facility to be used for general corporate purposes.

Advances under the Five-Year Credit Facility bear interest at Base Rate or LIBOR plus an applicable margin rate (currently 0.125% per annum for Base Rate advances and 1.125% per annum for LIBOR advances) depending on our credit rating. Amounts repaid may be re-borrowed during the term of the Five-Year Credit Facility. We are required to pay a quarterly commitment fee (currently 0.125% per annum) on the undrawn portion of the $2.25 billion commitment which is also based on our credit rating. In addition to other customary restrictive covenants, the Five-Year Credit Facility requires us to maintain a total debt to total capitalization ratio of less than or equal to 50%. We have the right, subject to receipt of commitments from new or existing lenders, to increase the commitments under the Five-Year Credit Facility to an aggregate amount of up to $2.75 billion. We had no amounts outstanding under the Five-Year Credit Facility as of December 31, 2014 and 2013.

Maturities

The aggregate maturities of our debt, excluding net unamortized premiums of $247.9 million, as of December 31, 2014 were as follows (in millions):

2015	$	34.8
2016	1,019.7
2017	4.5
2018	4.5
2019	504.5
Thereafter	4,104.5
Total	$	5,672.5

Interest expense totaled $161.4 million, $158.8 million and $123.6 million for the years ended December 31, 2014, 2013 and 2012, respectively, which was net of interest amounts capitalized of $78.2 million, $67.7 million and $105.8 million in connection with our newbuild rig construction and other capital projects.

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Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Long-Term Incentive Plan (LTIP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance as awards	14,000,000
Non-Vested Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost on awards	$ 100,700,000
Recognized compensation cost, weighted-average period, years	2 years 1 month 6 days
Non-Vested Share Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards, vest rate	33.00%
Non-Vested Share Awards [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards, vest rate	20.00%
Share Options Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance as awards	7,700,000
Unrecognized compensation cost on awards	0
Share options award, outstanding	472,000
Exercisable In Increments Over Four-Year Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards, vest rate	25.00%
Exercisable In Increments Over Three-Year Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards, vest rate	33.00%
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost on awards	5,000,000
Recognized compensation cost, weighted-average period, years	1 year 10 months 24 days
Share option awards, exercisable, increment	3 years
Performance awards, granted, aggregate grant-date fair value	7,400,000	8,200,000	7,200,000
Performance awards, vested, aggregate fair value	6,900,000	7,400,000	5,300,000
Recognized compensation expense	3,400,000	6,600,000	9,700,000
Savings Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance as awards	1,000,000
Share awards, vest rate	33.00%
Share option awards, exercisable, increment	3 years
Employee match	100.00%
Total matching contributions	20,700,000	21,100,000	16,500,000
Profit sharing contribution provisions	$ 30,700,000	$ 55,300,000	$ 45,100,000
Savings Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of eligible employee compensation to be matched by employer	5.00%

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Supplemental Financial Information (Other Assets, Net) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Supplemental Financial Information [Abstract]
Intangible assets	$ 49.0	$ 83.8
Unbilled reimbursable receivables	18.6	51.9
Prepaid taxes on intercompany transfers of property	39.7	50.2
Supplemental executive retirement plan assets	43.2	37.7
Contracts Receivable, Claims and Uncertain Amounts	30.6	30.6
Deferred mobilization costs	82.3	59.1
Deferred tax assets	38.4	25.2
Other	12.4	14.2
Other assets, net	$ 314.2	$ 352.7

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Discontinued Operations (Schedule of Rig Sales) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended					32 Months Ended		3 Months Ended								1 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2014		Dec. 31, 2014		Sep. 30, 2014		Mar. 31, 2014		Jun. 30, 2014		Mar. 31, 2013		Oct. 31, 2012		Jun. 30, 2012		May 31, 2012		Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value	$ 291.8	[1],[2]				$ 291.8	[1],[2]	$ 291.8	[1],[2]
Pre-tax Gain/(Loss)						19.3	[2],[3]
Net Cash Provided by (Used in) Discontinued Operations	105.5		202.1	290.8		311.1	[2]
Floaters [Member] | ENSCO 5000 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value	0.5	[1],[2]				0.5	[1],[2]	0.5	[1],[2]
Pre-tax Gain/(Loss)								0.8
Net Cash Provided by (Used in) Discontinued Operations								1.3	[2]
Floaters [Member] | ENSCO 5003 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value				89.4	[1],[2]
Pre-tax Gain/(Loss)				(21.2)
Net Cash Provided by (Used in) Discontinued Operations				68.2	[2]
Jackups [Member] | ENSCO 93 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value										52.9	[1],[2]
Pre-tax Gain/(Loss)	1.2									(1.2)
Net Cash Provided by (Used in) Discontinued Operations	51.7	[2]								51.7	[2]
Jackups [Member] | ENSCO 69 And Wisconsin [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value												8.6	[1],[2]
Pre-tax Gain/(Loss)												23.6
Net Cash Provided by (Used in) Discontinued Operations												32.2	[2]
Jackups [Member] | ENSCO 85 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value														54.1	[1],[2]
Pre-tax Gain/(Loss)														10.3
Net Cash Provided by (Used in) Discontinued Operations														64.4	[2]
Jackups [Member] | Pride Pennsylvania Rig [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value																15.7	[1],[2]
Pre-tax Gain/(Loss)																(0.2)
Net Cash Provided by (Used in) Discontinued Operations																15.5	[2]
Jackups [Member] | Pride Hawaii [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value																		16.8	[1],[2]
Pre-tax Gain/(Loss)																		2.0
Net Cash Provided by (Used in) Discontinued Operations																		18.8	[2]
Jackups [Member] | ENSCO 61 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value																				19.6	[1],[2]
Pre-tax Gain/(Loss)																				12.1
Net Cash Provided by (Used in) Discontinued Operations																				31.7	[2]
Jackups [Member] | ENSCO 59 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value																						21.9	[1],[2]
Pre-tax Gain/(Loss)																						0.9
Net Cash Provided by (Used in) Discontinued Operations																						22.8	[2]
Other [Member] | ENSCO I [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Book Value																								12.3	[1],[2]
Pre-tax Gain/(Loss)																								(7.8)
Net Cash Provided by (Used in) Discontinued Operations																								$ 4.5	[2]

[1] Includes the rig's net book value as well as inventory and other assets on the date of the sale.

[2] The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and were previously included within the operating segment noted in the above table.

[3] In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which are contracted to Pemex. As described below, the loss on sale and operating results of ENSCO 93 were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

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Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Instruments [Abstract]

Schedule Of Long-Term Debt Instruments

The carrying value of long-term debt as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014			2013
4.70% Senior notes due 2021	$	1,479.9		$	1,477.2
6.875% Senior notes due 2020	1,008.2			1,024.8
3.25% Senior notes due 2016	998.0			996.5
4.50% Senior notes due 2024	624.2			—
5.75% Senior notes due 2044	622.3			—
8.50% Senior notes due 2019	583.8			600.5
7.875% Senior notes due 2040	381.2			382.6
7.20% Debentures due 2027	149.2			149.1
4.33% MARAD bonds due 2016	46.6			78.9
6.36% MARAD bonds due 2015	—			25.3
4.65% MARAD bonds due 2020	27.0			31.5
Total debt	5,920.4			4,766.4
Less current maturities	(34.8		)	(47.5		)
Total long-term debt	$	5,885.6		$	4,718.9

Aggregate Maturities Of Long-Term Debt

The aggregate maturities of our debt, excluding net unamortized premiums of $247.9 million, as of December 31, 2014 were as follows (in millions):

2015	$	34.8
2016	1,019.7
2017	4.5
2018	4.5
2019	504.5
Thereafter	4,104.5
Total	$	5,672.5

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Sale Leaseback (Details) (USD $) In Millions, unless otherwise specified	32 Months Ended		12 Months Ended
	Dec. 31, 2014		Dec. 31, 2014	Dec. 31, 2013
Sale Leaseback Transaction [Line Items]
Deferred Gain on Sale of Property	$ 22.4		$ 22.4
Other Accrued Liabilities, Noncurrent	39.8		39.8	33.3
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	19.3	[1],[2]
ENSCO 83, 89, 93 and 98 [Member]
Sale Leaseback Transaction [Line Items]
Proceeds from Sale of Other Property, Plant, and Equipment			211.8
Sales Commissions and Fees			5.3
Sale Leaseback Transaction, Net Book Value	169.6		169.6
Gain (Loss) on Disposition of Property Plant Equipment			7.5
Sale Leaseback Transaction, Deferred Gain, Net	29.4		29.4
Deferred Gain on Sale of Property	$ 7.0		$ 7.0

[1] In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which are contracted to Pemex. As described below, the loss on sale and operating results of ENSCO 93 were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.

[2] The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and were previously included within the operating segment noted in the above table.

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Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Data [Abstract]

Summary Of Unaudited Quarterly Consolidated Income Statement

The following tables summarize our unaudited quarterly consolidated income statement data for the years ended December 31, 2014 and 2013 (in millions, except per share amounts):

2014	First  Quarter			Second Quarter			Third Quarter			Fourth  Quarter			Year
Operating revenues	$	1,066.7		$	1,136.6		$	1,201.4		$	1,159.8		$	4,564.5
Operating expenses
Contract drilling (exclusive of depreciation)	520.2			542.5			500.2			514.0			2,076.9
Loss on impairment	—			703.5			—			3,515.2			4,218.7
Depreciation	131.1			132.2			135.2			139.4			537.9
General and administrative	38.1			36.2			29.3			28.3			131.9
Operating income	377.3			(277.8		)	536.7			(3,037.1		)	(2,400.9		)
Other expense, net	(29.1		)	(30.8		)	(38.4		)	(49.6		)	(147.9		)
Income (loss) from continuing operations before income taxes	348.2			(308.6		)	498.3			(3,086.7		)	(2,548.8		)
Income tax expense (benefit)	49.5			42.6			74.6			(26.2		)	140.5
Income (loss) from continuing operations	298.7			(351.2		)	423.7			(3,060.5		)	(2,689.3		)
(Loss) income from discontinued operations, net	(2.0		)	(818.4		)	9.2			(388.0		)	(1,199.2		)
Net income (loss)	296.7			(1,169.6		)	432.9			(3,448.5		)	(3,888.5		)
Net income attributable to noncontrolling interests	(4.2		)	(3.1		)	(3.5		)	(3.3		)	(14.1		)
Net income (loss) attributable to Ensco	$	292.5		$	(1,172.7	)	$	429.4		$	(3,451.8	)	$	(3,902.6	)
Earnings (loss) per share – basic
Continuing operations	$	1.26		$	(1.53	)	$	1.79		$	(13.22	)	$	(11.70	)
Discontinued operations	(0.01		)	(3.54		)	0.04			(1.67		)	(5.18		)
	$	1.25		$	(5.07	)	$	1.83		$	(14.89	)	$	(16.88	)
Earnings (loss) per share – diluted
Continuing operations	$	1.26		$	(1.53	)	$	1.79		$	(13.22	)	$	(11.70	)
Discontinued operations	(0.01		)	(3.54		)	0.04			(1.67		)	(5.18		)
	$	1.25		$	(5.07	)	$	1.83		$	(14.89	)	$	(16.88	)

2013	First  Quarter			Second Quarter			Third Quarter			Fourth  Quarter			Year
Operating revenues	$	989.4		$	1,076.1		$	1,119.9		$	1,138.0		$	4,323.4
Operating expenses
Contract drilling (exclusive of depreciation)	451.4			496.1			499.2			500.4			1,947.1
Depreciation	120.0			124.0			124.7			127.5			496.2
General and administrative	37.8			36.4			37.4			35.2			146.8
Operating income	380.2			419.6			458.6			474.9			1,733.3
Other expense, net	(29.8		)	(39.8		)	(1.6		)	(28.9		)	(100.1		)
Income from continuing operations before income taxes	350.4			379.8			457.0			446.0			1,633.2
Income tax expense	47.8			43.2			67.5			44.6			203.1
Income from continuing operations	302.6			336.6			389.5			401.4			1,430.1
Income (loss) from discontinued operations, net	17.3			26.0			(8.1		)	(37.4		)	(2.2		)
Net income	319.9			362.6			381.4			364.0			1,427.9
Net income attributable to noncontrolling interests	(2.8		)	(1.7		)	(2.6		)	(2.6		)	(9.7		)
Net income attributable to Ensco	$	317.1		$	360.9		$	378.8		$	361.4		$	1,418.2
Earnings (loss) per share – basic
Continuing operations	$	1.29		$	1.44		$	1.66		$	1.71		$	6.09
Discontinued operations	0.07			0.11			(0.04		)	(0.16		)	(0.01		)
	$	1.36		$	1.55		$	1.62		$	1.55		$	6.08
Earnings (loss) per share – diluted
Continuing operations	$	1.29		$	1.44		$	1.66		$	1.70		$	6.08
Discontinued operations	0.07			0.11			(0.04		)	(0.16		)	(0.01		)
	$	1.36		$	1.55		$	1.62		$	1.54		$	6.07

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Supplemental Financial Information

12 Months Ended

Dec. 31, 2014

Supplemental Financial Information [Abstract]

Supplemental Financial Information

SUPPLEMENTAL FINANCIAL INFORMATION

Consolidated Balance Sheet Information

Accounts receivable, net, as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014			2013
Trade	$	878.8		$	869.8
Other	15.9			14.3
	894.7			884.1
Allowance for doubtful accounts	(11.4		)	(28.4		)
	$	883.3		$	855.7

Other current assets as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Inventory	240.3		256.4
Assets held for sale	152.4		8.6
Prepaid taxes	90.6		88.1
Deferred costs	61.9		47.4
Deferred tax assets	43.8		23.1
Prepaid expenses	33.8		18.5
Derivative assets	.6		11.6
Other	6.0		10.2
	$	629.4	$	463.9

Assets held for sale primarily consists of drilling rigs and equipment. See "Note 3 - Property and Equipment" for additional information on the assets classified as "held for sale" on our balance sheet as of December 31, 2014.

Other assets, net, as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred costs	$	82.3	$	59.1
Intangible assets	49.0		83.8
Supplemental executive retirement plan assets	43.2		37.7
Prepaid taxes on intercompany transfers of property	39.7		50.2
Deferred tax assets	38.4		25.2
Warranty and other claim receivables	30.6		30.6
Unbilled receivables	18.6		51.9
Other	12.4		14.2
	$	314.2	$	352.7

      Accrued liabilities and other as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred revenue	241.3		169.8
Personnel costs	214.0		242.0
Taxes	97.0		84.2
Accrued interest	83.8		68.0
Derivative liabilities	24.1		10.4
Advance payment received on sale of assets	—		33.0
Customer pre-payments	—		20.0
Other	36.4		31.3
	$	696.6	$	658.7

Other liabilities as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Deferred revenue	$	373.2	$	217.6
Unrecognized tax benefits (inclusive of interest and penalties)	142.4		148.0
Supplemental executive retirement plan liabilities	45.1		40.5
Intangible liabilities	40.7		69.1
Personnel costs	26.1		37.2
Other	39.8		33.3
	$	667.3	$	545.7

Accumulated other comprehensive income as of December 31, 2014 and 2013 consisted of the following (in millions):

	2014		2013
Derivative Instruments	$	8.0	$	20.6
Other	3.9		(2.4		)
	$	11.9	$	18.2

Consolidated Statement of Operations Information

Repair and maintenance expense related to continuing operations for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014		2013		2012
Repair and maintenance expense	$	357.2	$	287.8	$	276.3

Consolidated Statement of Cash Flows Information

Net cash provided by operating activities of continuing operations attributable to the net change in operating assets and liabilities for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014			2013			2012
Increase (decrease) in liabilities	208.2			(10.3		)	312.3
(Increase) decrease in other assets	(76.4		)	(94.1		)	67.8
(Increase) decrease in accounts receivable	(38.5		)	(46.7		)	59.1
	$	93.3		$	(151.1	)	$	439.2

Cash paid for interest and income taxes for each of the years in the three-year period ended December 31, 2014 was as follows (in millions):

	2014		2013		2012
Interest, net of amounts capitalized	$	170.0	$	182.2	$	150.7
Income taxes	218.2		195.4		77.9

Capitalized interest totaled $78.2 million, $67.7 million and $105.8 million during the years ended December 31, 2014, 2013 and 2012, respectively. Capital expenditure accruals totaling $137.2 million, $111.8 million and $110.7 million for the years ended December 31, 2014, 2013 and 2012, respectively, were excluded from investing activities in our consolidated statements of cash flows. 

Amortization of intangibles and other, net, included amortization of intangible assets and liabilities related to the estimated fair values of acquired Company firm drilling contracts in place at the Pride acquisition date, debt premiums related to the fair value adjustment of acquired Company debt instruments, deferred charges for income taxes incurred on intercompany transfers of drilling rigs and certain other deferred costs.

Concentration of 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 consist 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 generally have been within management's expectations. During 2014, we insured certain receivables deemed to have a higher credit risk. We mitigate our credit risk relating to cash and investments by focusing on diversification and quality of instruments. Cash equivalents and short-term investments consist of a portfolio of high-grade instruments. Custody of cash and cash equivalents and short-term investments is maintained at several well-capitalized financial institutions, and we monitor the financial condition of those financial institutions.  

We mitigate our credit risk relating to counterparties of our derivatives through a variety of techniques, including transacting with multiple, high-quality financial institutions, thereby limiting our exposure to individual counterparties and by entering into ISDA Master Agreements, which include provisions for a legally enforceable master netting agreement, with almost all derivative counterparties. The terms of the ISDA agreements may also include credit support requirements, cross default provisions, termination events, or set-off provisions. Legally enforceable master netting agreements reduce credit risk by providing protection in bankruptcy in certain circumstances and generally permitting the closeout and netting of transactions with the same counterparty upon the occurrence of certain events.

During 2014, BP accounted for $723.9 million, or 16%, of our consolidated revenues, 80% of which were attributable to our Floaters segment.

During 2013, Petrobras accounted for $604.8 million, or 14%, of consolidated revenues, all of which were provided by our Floaters segment, and BP accounted for $444.9 million, or 10%, of consolidated revenues, 84% of which were attributable to our Floaters segment.

During 2012, Petrobras accounted for $771.9 million, or 21%, of our consolidated revenues, all of which were attributable to our Floaters segment.

During 2014, revenues provided by our drilling operations in the U.S. Gulf of Mexico totaled $1.7 billion, or 38%, of our consolidated revenues, of which 79% were provided by our Floaters segment. Revenues provided by our drilling operations in Angola and Brazil during the year ended December 31, 2014 totaled $607.9 million and $459.1 million, or 13% and 10%, of our consolidated revenues, all of which were provided by our Floaters segment.

During 2013, revenues provided by our drilling operations in the U.S. Gulf of Mexico totaled $1.7 billion, or 39%, of our consolidated revenues, of which 77% were provided by our Floaters segment. Revenues provided by our drilling operations in Brazil during the year ended December 31, 2013 totaled $683.7 million, or 16%, of our consolidated revenue, all of which were provided by our Floaters segment.

During 2012, revenues provided by our drilling operations in the U.S. Gulf of Mexico totaled $1.3 billion, or 35%, of our consolidated revenues, of which 75% were provided by our Floaters segment. Revenues provided by our drilling operations in Brazil during the year ended December 31, 2012 totaled $776.3 million, or 21%, of our consolidated revenues, all of which were provided by our Floaters segment.