ENSCO PLC, 10-Q filed on 10/30/2018

Quarterly Report

Cover Financial Statements Notes to Financial Statements Accounting Policies Notes Tables Notes Details

Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2018	Oct. 23, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Entity Registrant Name	Ensco plc
Entity Central Index Key	0000314808
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Shares, Shares Outstanding		437,100,203
Entity Emerging Growth Company	false
Entity Small Business	false

Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenues	$ 430.9	$ 460.2	$ 1,306.4	$ 1,388.8
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	327.1	285.8	996.6	855.2
Depreciation expense	120.6	108.2	356.5	325.3
General and administrative	25.1	30.4	79.1	86.9
Total operating expenses	472.8	424.4	1,432.2	1,267.4
OPERATING INCOME (LOSS)	(41.9)	35.8	(125.8)	121.4
OTHER INCOME (EXPENSE)
Interest income	3.6	7.5	10.5	22.3
Interest expense, net	(72.2)	(48.1)	(213.5)	(167.0)
Other, net	(9.1)	0.2	(30.2)	(6.6)
Other income (expense), net	(77.7)	(40.4)	(233.2)	(151.3)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(119.6)	(4.6)	(359.0)	(29.9)
PROVISION FOR INCOME TAXES
Current income tax expense	(5.7)	14.9	21.5	32.3
Deferred income tax expense	29.0	8.5	44.9	34.5
Total provision for income taxes	23.3	23.4	66.4	66.8
LOSS FROM CONTINUING OPERATIONS	(142.9)	(28.0)	(425.4)	(96.7)
LOSS FROM DISCONTINUED OPERATIONS, NET	0.0	(0.2)	(8.1)	(0.4)
NET LOSS	(142.9)	(28.2)	(433.5)	(97.1)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.1)	2.8	(2.6)	0.5
NET LOSS ATTRIBUTABLE TO ENSCO	$ (145.0)	$ (25.4)	$ (436.1)	$ (96.6)
LOSS PER SHARE - BASIC AND DILUTED
Continuing operations (in dollars per share)	$ (0.33)	$ (0.08)	$ (0.99)	$ (0.32)
Discontinued operations (in dollars per share)	0.00	0.00	(0.02)	0.00
(Loss) earnings per share - basic and diluted (in dollars per share)	$ (0.33)	$ (0.08)	$ (1.01)	$ (0.32)
WEIGHTED-AVERAGE SHARES OUTSTANDING
Basic and Diluted (in shares)	434.4	301.2	434.0	300.9
CASH DIVIDENDS PER SHARE (in dollars per share)	$ 0.01	$ 0.01	$ 0.03	$ 0.03

Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
NET LOSS	$ (142.9)	$ (28.2)	$ (433.5)	$ (97.1)
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in derivative fair value	(1.9)	1.7	(6.8)	7.7
Reclassification of net (gains) losses on derivative instruments from other comprehensive income (loss) into net loss	0.7	(0.1)	(2.2)	1.1
Other	(0.1)	0.1	(0.4)	0.8
NET OTHER COMPREHENSIVE INCOME (LOSS)	(1.3)	1.7	(9.4)	9.6
COMPREHENSIVE LOSS	(144.2)	(26.5)	(442.9)	(87.5)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.1)	2.8	(2.6)	0.5
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$ (146.3)	$ (23.7)	$ (445.5)	$ (87.0)

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 196.0	$ 445.4
Short-term investments	434.0	440.0
Accounts receivable, net	348.5	345.4
Other current assets	404.0	381.2
Total current assets	1,382.5	1,612.0
PROPERTY AND EQUIPMENT, AT COST	15,544.4	15,332.1
Less accumulated depreciation	2,812.8	2,458.4
Property and equipment, net	12,731.6	12,873.7
OTHER ASSETS	104.5	140.2
TOTAL ASSETS	14,218.6	14,625.9
CURRENT LIABILITIES
Accounts payable - trade	225.8	432.6
Accrued liabilities and other	310.0	325.9
Total current liabilities	535.8	758.5
LONG-TERM DEBT	5,002.6	4,750.7
OTHER LIABILITIES	390.0	386.7
COMMITMENTS AND CONTINGENCIES
ENSCO SHAREHOLDERS' EQUITY
Additional paid-in capital	7,216.6	7,195.0
Retained earnings	1,082.5	1,532.7
Accumulated other comprehensive income	19.2	28.6
Treasury shares, at cost	(72.1)	(69.0)
Total Ensco shareholders' equity	8,292.4	8,732.1
NONCONTROLLING INTERESTS	(2.2)	(2.1)
Total equity	8,290.2	8,730.0
Total liabilities and shareholders' equity	14,218.6	14,625.9
Class A ordinary shares, U.S.
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	46.1	44.7
Common Class B, Par Value In GBP [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	$ 0.1	$ 0.1

Condensed Consolidated Balance Sheets (Parenthetical)	Sep. 30, 2018 £ / shares shares	Sep. 30, 2018 $ / shares shares	Dec. 31, 2017 £ / shares shares	Dec. 31, 2017 $ / shares shares
Treasury shares, shares held (in shares)	23,600,000	23,600,000	11,100,000	11,100,000
Class A ordinary shares, U.S.
Common stock, par value per share (in dollars per share or pounds sterling per share) \| $ / shares		$ 0.10		$ 0.10
Common shares, shares issued (in shares)	460,700,000	460,700,000	447,100,000	447,100,000
Common Class B, Par Value In GBP [Member]
Common stock, par value per share (in dollars per share or pounds sterling per share) \| £ / shares	£ 1		£ 1
Common shares, shares issued (in shares)	50,000	50,000	50,000	50,000
Common shares, shares authorized (in shares)	50,000	50,000	50,000	50,000

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Net loss	$ (433.5)	$ (97.1)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities of continuing operations:
Depreciation expense	356.5	325.3
Deferred income tax expense	44.9	34.5
Share-based compensation expense	31.7	31.3
Amortization, net	(30.7)	(56.2)
Loss on debt extinguishment	19.0	2.6
Loss from discontinued operations, net	8.1	0.4
Gain on bargain purchase	(1.8)	0.0
Other	(5.3)	(18.6)
Changes in operating assets and liabilities	(71.1)	(2.6)
Net cash provided by (used in) operating activities of continuing operations	(82.2)	219.6
INVESTING ACTIVITIES
Maturities of short-term investments	675.0	1,412.7
Purchases of short-term investments	(669.0)	(1,040.0)
Additions to property and equipment	(378.7)	(474.1)
Other	10.0	2.6
Net cash used in investing activities of continuing operations	(362.7)	(98.8)
FINANCING ACTIVITIES
Proceeds from Issuance of Senior Long-term Debt	1,000.0	0.0
Reduction of long-term borrowings	(771.2)	(537.0)
Debt issuance costs	(17.0)	(5.5)
Cash dividends paid	(13.4)	(9.4)
Other	(4.7)	(4.5)
Net cash provided by (used in) financing activities	193.7	(556.4)
Net cash provided by (used in) discontinued operations	2.5	(0.4)
Effect of exchange rate changes on cash and cash equivalents	(0.7)	0.7
DECREASE IN CASH AND CASH EQUIVALENTS	(249.4)	(435.3)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	445.4	1,159.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 196.0	$ 724.4

Unaudited Condensed Consolidated Financial Statements	9 Months Ended
Unaudited Condensed Consolidated Financial Statements	Sep. 30, 2018
Unaudited Condensed Consolidated Financial Statements [Abstract]
Unaudited Condensed Consolidated Financial Statements	Unaudited Condensed Consolidated Financial Statements We prepared the accompanying condensed consolidated financial statements of Ensco plc and subsidiaries (the "Company," "Ensco," "our," "we" or "us") in accordance with accounting principles generally accepted in the United States of America ("GAAP"), pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") included in the instructions to Form 10-Q and Article 10 of Regulation S-X. The financial information included in this report is unaudited but, in our opinion, includes all adjustments (consisting of normal recurring adjustments) that are necessary for a fair presentation of our financial position, results of operations and cash flows for the interim periods presented. The December 31, 2017 condensed consolidated balance sheet data were derived from our 2017 audited consolidated financial statements, but do not include all disclosures required by GAAP. The preparation of our condensed consolidated financial statements requires us to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, the related revenues and expenses and disclosures of gain and loss contingencies as of the date of the financial statements. Actual results could differ from those estimates. The financial data for the three-month and nine-month periods ended September 30, 2018 and 2017 included herein have been subjected to a limited review by KPMG LLP, our independent registered public accounting firm. The accompanying independent registered public accounting firm's review report is not a report within the meaning of Sections 7 and 11 of the Securities Act, and the independent registered public accounting firm's liability under Section 11 does not extend to it. Results of operations for the three-month and nine-month periods ended September 30, 2018 are not necessarily indicative of the results of operations that will be realized for the year ending December 31, 2018. We recommend these condensed consolidated financial statements be read in conjunction with our annual report on Form 10-K for the year ended December 31, 2017, filed with the SEC on February 27, 2018, and our quarterly reports on Form 10-Q filed with the SEC on April 26, 2018 and July 26, 2018. Proposed Rowan Transaction On October 7, 2018, Ensco plc and Rowan Companies plc ("Rowan") entered into an agreement that provides for the combination of the two companies (the "Transaction Agreement"). Ensco has agreed to acquire the entire issued and to be issued share capital of Rowan in an all-stock transaction (the "Transaction") by way of a scheme of arrangement to be undertaken by Rowan under Part 26 of the UK Companies Act 2006. Subject to the terms and conditions of the Transaction Agreement, each Class A ordinary share of Rowan will be converted into the right to receive 2.215 Class A ordinary shares of Ensco plc. We estimate the total consideration to be delivered in the Transaction to be approximately $2.3 billion, consisting of approximately 283 million of our shares based on the closing price of $8.11 on October 22, 2018. The value of the Transaction consideration will fluctuate until the closing date based on changes in the price of our shares and the number of shares of Rowan common stock outstanding. The completion of the Transaction is subject to various closing conditions, including, among others, (i) the receipt of certain approvals from the Rowan and Ensco shareholders, including approval of the allotment and issuance of the Transaction consideration by Ensco's shareholders, (ii) the sanction of the Transaction by the High Court of Justice of England and Wales, (iii) the receipt of certain required regulatory approvals or elapse of certain review periods with respect thereto, including those in the United States, United Kingdom and Kingdom of Saudi Arabia, (iv) the absence of legal restraints prohibiting or restraining the Transaction and (v) the absence of any law or order reasonably expected to result in the dissolution of the Saudi Aramco Offshore Drilling Company, Rowan’s joint venture with Saudi Aramco (the “ARO JV”), or the sale, disposition, forfeiture or nationalization of Rowan’s interest in the ARO JV. The Transaction is expected to close during the first half of 2019, subject to satisfaction of all conditions to closing. New Accounting Pronouncements In August 2018, the FASB issued Update 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract ("Update 2018-15"), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that included an internal-use software license). This update is effective for fiscal years beginning after December 15, 2020 and interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the effect that Update 2018-15 will have on our consolidated financial statements and related disclosures. In February 2018, the Financial Accounting Standards Board (the "FASB") issued Update 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income ("Update 2018-02"), which allows for a reclassification from accumulated other comprehensive income (AOCI) to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. This update is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years, with early adoption permitted. We adopted Update 2018-02 effective January 1, 2018. As a result, we reclassified a total of $800,000 in tax effects from AOCI to opening retained earnings. In August 2017, the FASB issued Update 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities ("Update 2017-12"), which will make more hedging strategies eligible for hedge accounting. It also amends presentation and disclosure requirements and changes how companies assess effectiveness. This update is effective for annual and interim periods beginning after December 15, 2018, with early adoption permitted. We are currently evaluating the effect that Update 2017-12 will have on our consolidated financial statements and related disclosures. During 2016, the FASB issued Update 2016-02, Leases (Topic 842) ("Update 2016-02"), which requires an entity to recognize lease assets and lease liabilities on the balance sheet and to disclose key qualitative and quantitative information about the entity's leasing arrangements. This update is effective for annual and interim periods beginning after December 15, 2018, with early adoption permitted. During our evaluation of Update 2016-02, we concluded that our drilling contracts contain a lease component. In July 2018, the FASB issued Accounting Standard Update 2018-11, Leases (Topic 842), Target Improvements, which (1) provides for a new transition method whereby entities may elect to adopt the Update using a prospective with cumulative catch-up approach and (2) provides lessors with a practical expedient, by class of underlying asset, to not separate lease and non-lease components when the non-lease component is the predominant element of the combined component. The lessor practical expedient is limited to circumstances in which the non-lease component otherwise would be accounted for under Topic 606 (discussed below). We are currently evaluating the effect these Updates will have on our consolidated financial statements and related disclosures. With respect to leases whereby we are the lessee, we expect to recognize upon adoption on January 1, 2019 lease liabilities and offsetting "right of use" assets ranging from approximately $55 million to $75 million. During 2014, the FASB issued Update 2014-09, Revenue from Contracts with Customers (Topic 606) ("Update 2014-09"), which requires entities to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. Update 2014-09 is effective for annual and interim periods for fiscal years beginning after December 15, 2017. We adopted Update 2014-09 effective January 1, 2018, using the modified retrospective approach. Only customer contracts that were not completed as of the effective adoption date were evaluated under the transition guidance to determine if a cumulative catch-up adjustment to retained earnings was warranted. Revenues recognized in prior years for customer contracts that expired prior to the effective adoption date continue to be reported under the previous revenue recognition guidance. Our adoption of Update 2014-09 did not result in a cumulative effect on retained earnings and no adjustments were made to prior periods. While Update 2014-09 requires additional disclosure regarding revenues recognized from customer contracts, our adoption did not have a material impact on the recognition of current or prior period revenues as compared to previous guidance nor do we expect a material impact to our pattern of revenue recognition in future periods. See "Note 2 - Revenue from Contracts with Customers" for additional information.

Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer [Text Block]

Revenue from Contracts with Customers

We provide drilling services on a day rate contract basis. Under day rate contracts, we provide an integrated service that includes the provision of a drilling rig and rig crews for which we receive a daily rate that may vary between the full rate and zero rate throughout the duration of the contractual term, depending on the operations of the rig. We also may receive lump-sum fees or similar compensation for the mobilization, demobilization and capital upgrades of our rigs. Our customers bear substantially all of the costs of constructing the well and supporting drilling operations, as well as the economic risk relative to the success of the well.

Our integrated drilling service provided under each drilling contract is a single performance obligation satisfied over time and comprised of a series of distinct time increments, or service periods. Total revenue is determined for each individual drilling contract by estimating both fixed and variable consideration expected to be earned over the contract term. Fixed consideration generally relates to activities such as mobilization, demobilization and capital upgrades of our rigs that are not distinct within the context of our contracts and is recognized on a straight-line basis over the contract term. Variable consideration generally relates to distinct service periods during the contract term and is recognized in the period when the services are performed.

The amount estimated for variable consideration is only recognized as revenue to the extent that it is probable that a significant reversal will not occur during the contract term. We have applied the optional exemption afforded in Update 2014-09 and have not disclosed the variable consideration related to our estimated future day rate revenues. The remaining duration of our drilling contracts based on those in place as of September 30, 2018 was between approximately one month and four years.

Day Rate Drilling Revenue

Our drilling contracts provide for payment on a day rate basis and include a rate schedule with higher rates for periods when the drilling unit is operating and lower rates or zero rates for periods when drilling operations are interrupted or restricted. The day rate invoiced to the customer is determined based on the varying rates applicable to specific activities performed on an hourly basis. Day rate consideration is allocated to the distinct hourly increment to which it relates within the contract term and is generally recognized consistent with the contractual rate invoiced for the services provided during the respective period. Invoices are typically issued to our customers on a monthly basis and payment terms on customer invoices typically range from 30 to 45 days.

Certain of our contracts contain performance incentives whereby we may earn a bonus based on pre-established performance criteria. Such incentives are generally based on our performance over individual monthly time periods or individual wells. Consideration related to performance bonus is generally recognized in the specific time period to which the performance criteria was attributed.

We may receive termination fees if certain drilling contracts are terminated by the customer prior to the end of the contractual term. Such compensation is recognized as revenue when our performance obligation is satisfied, the termination fee can be reasonably measured and collection is probable.

Mobilization / Demobilization Revenue

In connection with certain 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 prior to commencement of drilling operations are recorded as a contract liability and amortized on a straight-line basis over the contract term. Demobilization fees expected to be received upon contract completion are estimated at contract inception and recognized on a straight-line basis over the contract term. In some cases, demobilization fees may be contingent upon the occurrence or non-occurrence of a future event. In such cases, this may result in cumulative-effect adjustments to demobilization revenues upon changes in our estimates of future events during the contract term.

Capital Upgrade / Contract Preparation Revenue

In connection with certain contracts, we receive lump-sum fees or similar compensation for requested capital upgrades to our drilling rigs or for other contract preparation work. Fees received for requested capital upgrades and other contract preparation work are recorded as a contract liability and amortized on a straight-line basis over the contract term to operating revenues. Costs incurred for capital upgrades are capitalized and depreciated over the useful life of the asset.

Contract Assets and Liabilities

Contract assets represent amounts previously recognized as revenue but for which the right to invoice the customer is dependent upon our future performance. Once the previously recognized revenue is invoiced, the corresponding contract asset, or a portion thereof, is transferred to accounts receivable. Contract liabilities generally represent fees received for mobilization or capital upgrades.

Contract assets and liabilities are presented net on our condensed consolidated balance sheet on a contract-by-contract basis. Current contract assets and liabilities are included in other current assets and accrued liabilities and other, respectively, and noncurrent contract assets and liabilities are included in other assets and other liabilities, respectively, on our condensed consolidated balance sheets.

The following table summarizes our trade receivables, contract assets and contract liabilities (in millions):



	September 30, 2018				December 31, 2017
Current contract assets	$	3.0			$	3.0
Noncurrent contract assets	$	—			$	2.8
Current contract liabilities (deferred revenue)	$	69.0			$	71.9
Noncurrent contract liabilities (deferred revenue)	$	13.4			$	51.2

Significant changes in contract assets and liabilities during the period are as follows (in millions):



	Contract Assets				Contract Liabilities
Balance as of December 31, 2017	$	5.8			$	123.1
Increase due to cash received	—				32.0
Decrease due to amortization of deferred revenue that was included in the beginning contract liability balance	—				(57.6		)
Decrease due to amortization of deferred revenue that was added during the period	—				(15.1		)
Decrease due to transfer to receivables during the period	(2.8		)		—
Balance as of September 30, 2018	$	3.0			$	82.4

Deferred Contract Costs

Costs incurred for upfront rig mobilizations and certain contract preparations are attributable to our future performance obligation under each respective drilling contract. Such costs are deferred and amortized on a straight-line basis over the contract term. Demobilization 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 contract costs were included in other current assets and other assets on our condensed consolidated balance sheets and totaled $29.0 million and $40.6 million as of September 30, 2018 and December 31, 2017, respectively. During the three-month and nine-month periods ended September 30, 2018, amortization of such costs totaled $10.1 million and $26.0 million, respectively. During the three-month and nine-month periods ended September 30, 2017, amortization of such costs totaled $7.1 million and $21.8 million, respectively.

Deferred Certification Costs

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 on a straight-line basis over the corresponding certification periods. Deferred regulatory certification and compliance costs were included in other current assets and other assets on our condensed consolidated balance sheets and totaled $13.0 million and $15.3 million as of September 30, 2018 and December 31, 2017, respectively. During the three-month and nine-month periods ended September 30, 2018, amortization of such costs totaled $3.3 million and $9.6 million, respectively. During the three-month and nine-month periods ended September 30, 2017, amortization of such costs totaled $3.3 million and $9.1 million, respectively.

Future Amortization of Contract Liabilities and Deferred Costs

Our contract liabilities and deferred costs are amortized on a straight-line basis over the contract term or corresponding certification period to operating revenues and contract drilling expense, respectively. Expected future amortization of our contract liabilities and deferred costs recorded as of September 30, 2018 is set forth in the table below (in millions):



	Remaining 2018				2019				2020				2021 and Thereafter				Total
Amortization of contract liabilities	$	23.3			$	48.5			$	6.4			$	4.2			$	82.4
Amortization of deferred costs	$	11.4			$	21.1			$	6.8			$	2.7			$	42.0

Acquisition of Atwood

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Acquisition of Atwood

On October 6, 2017 (the "Merger Date"), we completed a merger transaction (the "Merger") with Atwood Oceanics, Inc. ("Atwood") and Echo Merger Sub, LLC, our wholly-owned subsidiary. Assets acquired and liabilities assumed in the Merger were recorded at their estimated fair values as of the Merger Date under the acquisition method of accounting. When the fair value of the net assets acquired exceeds the consideration transferred in an acquisition, the difference is recorded as a bargain purchase gain in the period in which the transaction occurs. As of September 30, 2018, we have completed our fair value assessments of assets acquired and liabilities assumed.

Assets Acquired and Liabilities Assumed

The provisional amounts recorded for assets acquired and liabilities assumed as of the Merger Date and respective measurement period adjustments were as follows (in millions):



	Amounts Recognized as of Merger Date				Measurement Period Adjustments ⁽¹⁾				Estimated Fair Value
Assets:
Cash and cash equivalents⁽²⁾	$	445.4			$	—			$	445.4
Accounts receivable⁽³⁾	62.3				(1.6		)		60.7
Other current assets	118.1				4.6				122.7
Property and equipment	1,762.0				9.2				1,771.2
Other assets	23.7				(5.1		)		18.6
Liabilities:
Accounts payable and accrued liabilities	64.9				(1.1		)		63.8
Other liabilities	118.7				6.4				125.1
Net assets acquired	2,227.9				1.8				2,229.7
Less:
Merger consideration	(781.8		)						(781.8		)
Repayment of Atwood debt	(1,305.9		)						(1,305.9		)
Bargain purchase gain	$	140.2							$	142.0

⁽¹⁾

The measurement period adjustments reflect changes in the estimated fair values of certain assets and liabilities, primarily related to inventory, capital equipment and other liabilities. The measurement period adjustments were recorded to reflect new information obtained about facts and circumstances existing as of the Merger Date and did not result from subsequent intervening events. The adjustments recorded resulted in a $6.5 million decrease and a $1.8 million increase to bargain purchase gain during the three-month and nine-month periods ended September 30, 2018, respectively, and are included in other, net, in our condensed consolidated statements of operations.


⁽²⁾	Upon closing of the Merger, we utilized acquired cash of $445.4 million and cash on hand from the liquidation of short-term investments to repay Atwood's debt and accrued interest of $1.3 billion.

⁽³⁾Gross contractual amounts receivable totaled $64.7 million as of the Merger Date.

Bargain Purchase Gain

The fair values assigned to assets acquired net of liabilities assumed exceeded the consideration transferred, resulting in a bargain purchase gain primarily due to depressed offshore drilling company valuations. Market capitalizations across the offshore drilling industry declined significantly since mid-2014 due to the decline in commodity prices and the related imbalance of supply and demand for drilling rigs. The resulting bargain purchase gain was further driven by the decline in our share price from $6.70 to $5.83 between the last trading day prior to the announcement of the Merger and the Merger Date.

Intangible Assets and Liabilities

We recorded intangible assets totaling $30.1 million representing the estimated fair value of Atwood's firm drilling contracts in place at the Merger Date with favorable contract terms compared to then-market day rates for comparable drilling rigs.

Operating revenues were net of $2.8 million and $8.6 million of asset amortization during the three-month and nine-month periods ended September 30, 2018, respectively. The remaining balance of $5.4 million was included in other assets on our condensed consolidated balance sheet as of September 30, 2018. This balance will be amortized to operating revenues over the remaining drilling contract term on a straight-line basis totaling $2.8 million and $2.6 million during the remainder of 2018 and 2019, respectively.

We recorded intangible liabilities of $60.0 million for the estimated fair value of unfavorable drillship construction contracts, which were determined by comparing the firm obligations for the remaining construction of ENSCO DS-13 and ENSCO DS-14 to the estimated current market rates for the construction of a comparable drilling rig. The liabilities will be amortized over the estimated life of ENSCO DS-13 and ENSCO DS-14 as a reduction of depreciation expense beginning on the date the rig is placed into service.

Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

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



	Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)				Total
As of September 30, 2018
Supplemental executive retirement plan assets	$	30.5			$	—			$	—			$	30.5
Total financial assets	$	30.5			$	—			$	—			$	30.5
Derivatives, net	$	—			$	(8.9	)		$	—			$	(8.9	)
Total financial liabilities	$	—			$	(8.9	)		$	—			$	(8.9	)

As of December 31, 2017
Supplemental executive retirement plan assets	$	30.9			$	—			$	—			$	30.9
Derivatives, net	—				6.8				—				6.8
Total financial assets	$	30.9			$	6.8			$	—			$	37.7

Supplemental Executive Retirement Plan Assets

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

Derivatives

Our derivatives are measured at fair value on a recurring basis using Level 2 inputs. 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 measurement of our derivatives was 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 long-term debt instruments were as follows (in millions):



	September 30, 2018								December 31, 2017
	Carrying Value				Estimated Fair Value				Carrying Value				Estimated Fair Value
8.50% Senior notes due 2019⁽¹⁾	$	—			$	—			$	251.4			$	252.9
6.875% Senior notes due 2020⁽¹⁾	128.2				128.3				477.9				473.1
4.70% Senior notes due 2021⁽¹⁾	112.6				110.9				267.1				265.3
3.00% Exchangeable senior notes due 2024⁽²⁾	658.9				851.6				635.7				757.1
4.50% Senior notes due 2024	619.7				537.3				619.3				527.1
8.00% Senior notes due 2024	337.2				336.7				337.9				333.8
5.20% Senior notes due 2025	664.2				585.6				663.6				571.4
7.75% Senior notes due 2026	984.4				995.0				—				—
7.20% Debentures due 2027	149.3				141.7				149.3				141.9
7.875% Senior notes due 2040	375.5				285.1				376.7				258.8
5.75% Senior notes due 2044	972.6				752.6				971.8				690.4
Total	$	5,002.6			$	4,724.8			$	4,750.7			$	4,271.8


⁽¹⁾	The reduction in carrying value of our senior notes due 2019, 2020 and 2021 resulted from repurchases and redemptions during the first quarter 2018. See "Note 7 - Debt" for additional information.

⁽²⁾

Our exchangeable senior notes due 2024 (the "2024 Convertible Notes") were issued with a conversion feature. The 2024 Convertible Notes were separated into their liability and equity components on our condensed consolidated balance sheet. The equity component was initially recorded to additional paid-in capital and as a debt discount that will be amortized to interest expense over the life of the instrument. Excluding the unamortized discount, the carrying value of the 2024 Convertible Notes was $835.7 million and $834.0 million as of September 30, 2018 and December 31, 2017, respectively.

The estimated fair values of our senior notes and debentures were determined using quoted market prices, which are level 1 inputs.

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 September 30, 2018 and December 31, 2017. Our short-term investments consisted of time deposits with initial maturities in excess of three months but less than one year as of each respective balance sheet date.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Derivative Instruments

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

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

All derivatives were recorded on our condensed consolidated balance sheets at fair value. Derivatives subject to legally enforceable master netting agreements were not offset in our condensed consolidated balance sheets. Accounting for the gains and losses resulting from changes in derivative fair value depends on the use of the derivative and whether it qualifies for hedge accounting. Net liabilities of $8.9 million and net assets of $6.8 million associated with our foreign currency forward contracts were included on our condensed consolidated balance sheets as of September 30, 2018 and December 31, 2017, respectively. All of our derivative instruments mature during the next 18 months. See "Note 4 - Fair Value Measurements" for additional information on the fair value measurement of our derivatives.

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



	Derivative Assets								Derivative Liabilities
	September 30, 2018				December 31, 2017				September 30, 2018				December 31, 2017
Derivatives Designated as Hedging Instruments
Foreign currency forward contracts - current⁽¹⁾	$	.2			$	5.9			$	7.0			$	.2
Foreign currency forward contracts - non-current⁽²⁾	—				.5				.5				.1
	.2				6.4				7.5				.3

Derivatives Not Designated as Hedging Instruments
Foreign currency forward contracts - current⁽¹⁾	.2				.9				1.8				.2
Total	$	.4			$	7.3			$	9.3			$	.5


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


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

We utilize cash flow hedges to hedge forecasted foreign currency denominated transactions, primarily to reduce our exposure to foreign currency exchange rate risk associated with contract drilling expenses and capital expenditures denominated in various currencies. As of September 30, 2018, we had cash flow hedges outstanding to exchange an aggregate $187.9 million for various foreign currencies, including $79.0 million for British pounds, $57.5 million for Australian dollars, $20.7 million for euros, $14.0 million for Singapore dollars, $13.9 million for Brazilian reals and $2.8 million for other currencies.

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

Three Months Ended September 30, 2018 and 2017



	Gain (Loss) Recognized in Other Comprehensive Income (Loss) (Effective Portion)								Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)⁽¹⁾								Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)⁽²⁾
	2018				2017				2018				2017				2018				2017
Interest rate lock contracts⁽³⁾	$	—			$	—			$	(.1	)		$	(.1	)		$	—			$	—
Foreign currency forward contracts⁽⁴⁾	(1.9		)		1.7				(.6		)		.2				(.3		)		.3
Total	$	(1.9	)		$	1.7			$	(.7	)		$	.1			$	(.3	)		$	.3

Nine Months Ended September 30, 2018 and 2017



	Gain (Loss) Recognized in Other Comprehensive Income (Loss) (Effective Portion)								Gain (Loss) Reclassified from AOCI into Income (Effective Portion)⁽¹⁾								Loss Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)⁽²⁾
	2018				2017				2018				2017				2018				2017
Interest rate lock contracts⁽³⁾	$	—			$	—			$	(.2	)		$	(.3	)		$	—			$	—
Foreign currency forward contracts⁽⁵⁾	(6.8		)		7.7				2.4				(.8		)		(1.5		)		(.1		)
Total	$	(6.8	)		$	7.7			$	2.2			$	(1.1	)		$	(1.5	)		$	(.1	)


⁽¹⁾	Changes in the effective portion of cash flow hedge fair values 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 condensed consolidated statements of operations.


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

⁽⁴⁾

During the three-month period ended September 30, 2018, there were $800,000 of losses reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the three-month period ended September 30, 2017, there were no net amounts reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations.

⁽⁵⁾

During the nine-month period ended September 30, 2018, $1.8 million of gains were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the nine-month period ended September 30, 2017, $1.4 million of losses were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed 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 September 30, 2018, we held derivatives not designated as hedging instruments to exchange an aggregate $153.2 million for various foreign currencies, including $89.4 million for euros, $18.8 million for Australian dollars, $11.6 million for Indonesian rupiahs, $11.6 million for British pounds, $8.6 million for Thai bahts and $13.2 million for other currencies.

Net gains of $2.2 million and $2.7 million associated with our derivatives not designated as hedging instruments were included in other, net, in our condensed consolidated statements of operations for the three-month periods ended September 30, 2018 and 2017, respectively. Net gains of $9.7 million and $8.9 million associated with our derivatives not designated as hedging instruments were included in other, net, in our condensed consolidated statements of operations for the nine-month periods ended September 30, 2018 and 2017, respectively. These gains were partially offset by net foreign currency exchange losses during the respective periods.

As of September 30, 2018, the estimated amount of net losses associated with derivative instruments, net of tax, that would be reclassified into earnings during the next twelve months totaled $4.0 million.

Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

We compute basic and diluted earnings per share ("EPS") in accordance with the two-class method. Net loss 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.

During the three-month and nine-month periods ended September 30, 2018 and 2017, all income attributable to noncontrolling interests was from continuing operations. The following table is a reconciliation of loss from continuing operations attributable to Ensco shares used in our basic and diluted EPS computations for the three-month and nine-month periods ended September 30, 2018 and 2017 (in millions):



	Three Months Ended September 30,								Nine Months Ended September 30,
	2018				2017				2018				2017
Loss from continuing operations attributable to Ensco	$	(145.0	)		$	(25.2	)		$	(428.0	)		$	(96.2	)
Income from continuing operations allocated to non-vested share awards⁽¹⁾	(.2		)		(.1		)		(.4		)		(.3		)
Loss from continuing operations attributable to Ensco shares	$	(145.2	)		$	(25.3	)		$	(428.4	)		$	(96.5	)


⁽¹⁾	Losses are not allocated to non-vested share awards. Therefore, only dividends attributable to our non-vested share awards are included for the three-month and nine-month periods ended September 30, 2018 and 2017.

Anti-dilutive share awards totaling 1.6 million and 1.7 million were excluded from the computation of diluted EPS for the three-month and nine-month periods ended September 30, 2018. Anti-dilutive share awards totaling 1.3 million were excluded from the computation of diluted EPS for the three-month and nine-month periods ended September 30, 2017.

We have the option to settle our 2024 Convertible Notes in cash, shares or a combination thereof for the aggregate amount due upon conversion. Our intent is to settle the principal amount of the 2024 Convertible Notes in cash upon conversion. If the conversion value exceeds the principal amount (i.e., our share price exceeds the exchange price on the date of conversion), we expect to deliver shares equal to the remainder of our conversion obligation in excess of the principal amount.

During each reporting period that our average share price exceeds the exchange price, an assumed number of shares required to settle the conversion obligation in excess of the principal amount will be included in our denominator for the computation of diluted EPS using the treasury stock method. Our average share price did not exceed the exchange price during the three-month or nine-month periods ended September 30, 2018 and 2017.

Debt

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Debt

Senior Notes

On January 26, 2018, we issued $1.0 billion aggregate principal amount of unsecured 7.75% senior notes due 2026 at par (the "2026 Notes"). Interest on the 2026 Notes is payable semiannually on February 1 and August 1 of each year.

Tender Offers and Redemption

Concurrent with the issuance of the 2026 Notes in January 2018, we launched cash tender offers for up to $985.0 million aggregate principal amount of certain series of our senior notes issued by us and Pride International LLC, our wholly-owned subsidiary. The tender offers expired February 7, 2018, and we repurchased $182.6 million of our 8.50% senior notes due 2019, $256.6 million of our 6.875% senior notes due 2020 and $156.2 million of our 4.70% senior notes due 2021. Subsequently, we issued a redemption notice for the remaining outstanding $55.0 million principal amount of the 8.50% senior notes due 2019 and repurchased $71.4 million principal amount of our senior notes due 2020.

The following table sets forth the total principal amounts repurchased as a result of the tender offers, redemption and repurchase (in millions):



	Aggregate Principal Amount Repurchased				Aggregate Repurchase Price⁽¹⁾
8.50% Senior notes due 2019	$	237.6			$	256.8
6.875% Senior notes due 2020	328.0				354.7
4.70% Senior notes due 2021	156.2				159.7
Total	$	721.8			$	771.2


⁽¹⁾	Excludes accrued interest paid to holders of the repurchased senior notes.

During the first quarter of 2018, we recognized a pre-tax loss from debt extinguishment of $19.0 million, net of discounts, premiums, debt issuance costs and commissions.

Maturities

Following the January 2018 debt offering, repurchases and redemption, our only debt maturities until 2024 are $122.9 million during 2020 and $113.5 million during 2021.

Revolving Credit Facility

We have a $2.0 billion senior unsecured revolving credit facility ("Credit Facility") with a syndicate of banks to be used for general corporate purposes. Our borrowing capacity is $2.0 billion through September 2019 and declines to $1.3 billion through September 2020 and to $1.2 billion through September 2022. The credit agreement governing the Credit Facility includes an accordion feature allowing us to increase the commitments expiring in September 2022 up to an aggregate amount not to exceed $1.5 billion.

Advances under the Credit Facility bear interest at Base Rate or LIBOR plus an applicable margin rate, depending on our credit ratings. We are required to pay a quarterly commitment fee on the undrawn portion of the $2.0 billion commitment, which is also based on our credit rating.

In January 2018, Moody's downgraded our senior unsecured bond credit rating from B2 to B3. The rating actions resulted in an increase to the interest rates applicable to our borrowings and the quarterly commitment fee on the undrawn portion of the $2.0 billion commitment. The applicable margin rates are 3.00% per annum for Base Rate advances and 4.00% per annum for LIBOR advances. The quarterly commitment fee is 0.75% per annum on the undrawn portion of the $2.0 billion commitment.

The Credit Facility requires us to maintain a total debt to total capitalization ratio that is less than or equal to 60% and to provide guarantees from certain of our rig-owning subsidiaries sufficient to meet certain guarantee coverage ratios. The Credit Facility also contains customary restrictive covenants, including, among others, prohibitions on creating, incurring or assuming certain debt and liens (subject to customary exceptions, including a permitted lien basket that permits us to raise secured debt up to the lesser of $750 million or 10% of consolidated tangible net worth (as defined in the Credit Facility)); entering into certain merger arrangements; selling, leasing, transferring or otherwise disposing of all or substantially all of our assets; making a material change in the nature of the business; paying or distributing dividends on our ordinary shares (subject to certain exceptions, including the ability to continue paying a quarterly dividend of $0.01 per share); borrowings, if after giving effect to any such borrowings and the application of the proceeds thereof, the aggregate amount of available cash (as defined in the Credit Facility) would exceed $150 million; and entering into certain transactions with affiliates.

The Credit Facility also includes a covenant restricting our ability to repay indebtedness maturing after September 2022, which is the final maturity date of our Credit Facility. This covenant is subject to certain exceptions that permit us to manage our balance sheet, including the ability to make repayments of indebtedness (i) of acquired companies within 90 days of the completion of the acquisition or (ii) if, after giving effect to such repayments, available cash is greater than $250 million and there are no amounts outstanding under the Credit Facility.

As of September 30, 2018, we were in compliance in all material respects with our covenants under the Credit Facility. We had no amounts outstanding under the Credit Facility as of September 30, 2018 and December 31, 2017.

Our access to credit and capital markets depends on the credit ratings assigned to our debt. As a result of recent rating actions, we do not maintain an investment-grade status. Our current credit ratings, and any additional actual or anticipated downgrades in our credit ratings, could limit our available options when accessing credit and capital markets, or when restructuring or refinancing our debt. In addition, future financings or refinancings may result in higher borrowing costs and require more restrictive terms and covenants, which may further restrict our operations.

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2018
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income Taxes	Income Taxes Historically, we have calculated our provision for income taxes during interim reporting periods by applying the estimated annual effective tax rate for the full fiscal year to pre-tax income or loss, excluding discrete items, for the reporting period. We determined that since small changes in estimated pre-tax income or loss would result in significant changes in the estimated annual effective tax rate, the historical method would not provide a reliable estimate of income taxes for the three-month and nine-month periods ended September 30, 2018 and 2017. We used a discrete effective tax rate method to calculate income taxes for the three-month and nine-month periods ended September 30, 2018 and 2017. We will continue to evaluate income tax estimates under the historical method in subsequent quarters and employ a discrete effective tax rate method if warranted. Discrete income tax benefit for the three-month period ended September 30, 2018 was $7.9 million and was primarily attributable to an election under recently issued U.S. Treasury Regulations not to apply U.S. 2017 operating losses to deemed repatriated income, which provided for utilization of foreign tax credits that were subject to valuation allowance, and U.S. tax reform, partially offset by discrete tax expense related to the settlement of previously disclosed arbitration proceedings, rig sales and unrecognized tax benefits associated with tax positions taken in prior years. Discrete income tax benefit for the nine-month period ended September 30, 2018 was $19.1 million and was primarily attributable to the aforementioned election not to apply U.S. 2017 operating losses to deemed repatriated income, U.S. tax reform and a restructuring transaction, partially offset by discrete tax expense related to the settlement of previously disclosed arbitration proceedings, repurchase and redemption of senior notes, unrecognized tax benefits associated with tax positions taken in prior years and rig sales. Discrete income tax expense for the three-month period ended September 30, 2017 was $3.2 million primarily attributable to the sale of a rig and resolutions of prior year tax matters. Discrete income tax expense for the nine-month period ended September 30, 2017 was $13.0 million and was primarily attributable to the exchange offers and debt repurchase, rig sales, a restructuring transaction, settlement of a previously disclosed legal contingency, the effective settlement of a liability for unrecognized tax benefits associated with a tax position taken in prior years and other resolutions of prior year tax matters. U.S. Tax Reform The U.S. Tax Cuts and Jobs Act (“U.S. tax reform”) was enacted on December 22, 2017 and introduced significant changes to U.S. income tax law, including a reduction in the statutory income tax rate from 35% to 21% effective January 1, 2018, a one-time transition tax on deemed repatriation of deferred foreign income, a base erosion anti-abuse tax that effectively imposes a minimum tax on certain payments to non-U.S. affiliates, new and revised rules relating to the current taxation of certain income of foreign subsidiaries and revised rules associated with limitations on the deduction of interest. Due to the timing of the enactment of U.S. tax reform and the complexity involved in applying its provisions, we made reasonable estimates of its effects and recorded such amounts in our consolidated financial statements as of December 31, 2017 on a provisional basis. As we continue to analyze applicable information and data, and interpret any additional guidance issued by the U.S. Treasury Department, the Internal Revenue Service and others, we may make adjustments to the provisional amounts throughout the one-year measurement period as provided by Staff Accounting Bulletin No. 118. Our accounting for the enactment of U.S. tax reform will be completed during 2018, and any adjustments we recognize could be material. The ongoing impact of U.S. tax reform may result in an increase in our consolidated effective income tax rate in future periods. During the three-month and nine-month periods ended September 30, 2018, we recognized a tax benefit of $400,000 and $12.1 million, respectively, associated with the one-time transition tax on deemed repatriation of the deferred foreign income of our U.S. subsidiaries.

Contingencies	9 Months Ended
Contingencies	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Brazil Internal Investigation On August 29, 2018, we received a letter from the Division of Enforcement of the SEC informing us that the Division had concluded its investigation into previously disclosed alleged irregularities related to the drilling services agreement with Petrobras for ENSCO DS-5 (the “DSA”) and does not intend to recommend any enforcement action against us. On August 31, 2018, we received a letter from the DOJ stating that it had closed the inquiry into this matter and acknowledging our full cooperation with the investigation. Our investigation did not identify any evidence that Pride International LLC (“Pride”) or Ensco or any of their current or former employees were aware of or involved in any wrongdoing. For additional information about this investigation and the DSA dispute discussed below, see Note 10 to our condensed consolidated financial statements included in our quarterly report on Form 10-Q for the quarter ended June 30, 2018. In August 2017, one of our Brazilian subsidiaries was contacted by the Office of the Attorney General for the Brazilian state of Paraná in connection with a criminal investigation procedure initiated against agents of both Samsung Heavy Industries, a shipyard in South Korea (“SHI”), and Pride in relation to the DSA. The Brazilian authorities requested information regarding our compliance program and the findings of our internal investigations. We cooperated with the Office of the Attorney General and provided documents in response to its request. We cannot predict the scope or ultimate outcome of this procedure or whether any Brazilian governmental authority will open an investigation into Pride’s involvement in this matter, or if a proceeding were opened, the scope or ultimate outcome of any such investigation. DSA Dispute On January 4, 2016, Petrobras sent a notice to us declaring the DSA void effective immediately, reserving its rights and stating its intention to seek any restitution to which it may be entitled. The previously disclosed arbitral hearing on liability related to the matter was held in March 2018. Prior to the arbitration tribunal issuing its decision, we and Petrobras agreed in August 2018 to a settlement of all claims relating to the DSA. No payments were made by either party in connection with the settlement agreement. The parties agreed to normalize business relations and the settlement agreement provides for our participation in current and future Petrobras tenders on the same basis as all other companies invited to these tenders. No losses were recognized during the current period with respect to this settlement as all disputed receivables with Petrobras related to the DSA were fully reserved in 2015. In November 2016, we initiated separate arbitration proceedings in the U.K. against SHI for any losses we incur in connection with the foregoing Petrobras arbitration. SHI subsequently filed a statement of defense disputing our claim. In January 2018, the arbitration tribunal for the SHI matter issued an award on liability fully in our favor. SHI is liable to us for $10.0 million or damages that we can prove. We have submitted to the tribunal our claim for damages. The arbitral hearing on damages owed to us by SHI is scheduled to take place in the first quarter of 2019. We are unable to estimate the ultimate outcome of recovery for damages at this time. 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 September 30, 2018 totaled $124.3 million and are issued under facilities provided by various banks and other financial institutions. Obligations under these letters of credit and surety bonds are not normally called, as we typically comply with the underlying performance requirement. As of September 30, 2018, we had not been required to make collateral deposits with respect to these agreements.

Segment Information

9 Months Ended

Sep. 30, 2018

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 the three-month and nine-month periods ended September 30, 2018 and 2017 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 are included in "Reconciling Items." We measure segment assets as property and equipment.

Three Months Ended September 30, 2018



	Floaters				Jackups				Other				Operating Segments Total				Reconciling Items				Consolidated Total
Revenues	$	241.8			$	173.3			$	15.8			$	430.9			$	—			$	430.9
Operating expenses
Contract drilling (exclusive of depreciation)	175.6				136.4				15.1				327.1				—				327.1
Depreciation	77.8				39.3				—				117.1				3.5				120.6
General and administrative	—				—				—				—				25.1				25.1
Operating income (loss)	$	(11.6	)		$	(2.4	)		$	0.7			$	(13.3	)		$	(28.6	)		$	(41.9	)
Property and equipment, net	$	9,501.7			$	3,190.2			$	—			$	12,691.9			$	39.7			$	12,731.6

Three Months Ended September 30, 2017



	Floaters				Jackups				Other				Operating Segments Total				Reconciling Items				Consolidated Total
Revenues	$	291.9			$	153.1			$	15.2			$	460.2			$	—			$	460.2
Operating expenses
Contract drilling (exclusive of depreciation)	139.1				132.9				13.8				285.8				—				285.8
Depreciation	72.7				31.6				—				104.3				3.9				108.2
General and administrative	—				—				—				—				30.4				30.4
Operating income (loss)	$	80.1			$	(11.4	)		$	1.4			$	70.1			$	(34.3	)		$	35.8
Property and equipment, net	$	8,545.5			$	2,502.4			$	—			$	11,047.9			$	48.5			$	11,096.4

Nine Months Ended September 30, 2018



	Floaters				Jackups				Other				Operating Segments Total				Reconciling Items				Consolidated Total
Revenues	$	785.7			$	475.4			$	45.3			$	1,306.4			$	—			$	1,306.4
Operating expenses
Contract drilling (exclusive of depreciation)	564.4				390.1				42.1				996.6				—				996.6
Depreciation	233.9				112.3				—				346.2				10.3				356.5
General and administrative	—				—				—				—				79.1				79.1
Operating income (loss)	$	(12.6	)		$	(27.0	)		$	3.2			$	(36.4	)		$	(89.4	)		$	(125.8	)
Property and equipment, net	$	9,501.7			$	3,190.2			$	—			$	12,691.9			$	39.7			$	12,731.6

Nine Months Ended September 30, 2017



	Floaters				Jackups				Other				Operating Segments Total				Reconciling Items				Consolidated Total
Revenues	$	840.7			$	503.8			$	44.3			$	1,388.8			$	—			$	1,388.8
Operating expenses
Contract drilling (exclusive of depreciation)	431.1				383.8				40.3				855.2				—				855.2
Depreciation	217.5				95.3				—				312.8				12.5				325.3
General and administrative	—				—				—				—				86.9				86.9
Operating income	$	192.1			$	24.7			$	4.0			$	220.8			$	(99.4	)		$	121.4
Property and equipment, net	$	8,545.5			$	2,502.4			$	—			$	11,047.9			$	48.5			$	11,096.4

Information about Geographic Areas

As of September 30, 2018, the geographic distribution of our drilling rigs by reportable segment was as follows:



	Floaters		Jackups		Total⁽¹⁾
North & South America	8		4		12
Europe & Mediterranean	6		11		17
Middle East & Africa	3		12		15
Asia & Pacific Rim	5		7		12
Asia & Pacific Rim (under construction)	2		1		3
Total	24		35		59


⁽¹⁾	We provide management services on two rigs owned by third-parties in the U.S. Gulf of Mexico, which are not included in the table above.

Supplemental Financial Information

9 Months Ended

Sep. 30, 2018

Supplemental Financial Information [Abstract]

Supplemental Financial Information

Supplemental Financial Information

Consolidated Balance Sheet Information

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



	September 30, 2018				December 31, 2017
Trade	$	334.7			$	335.4
Other	17.7				33.6
	352.4				369.0
Allowance for doubtful accounts	(3.9		)		(23.6		)
	$	348.5			$	345.4

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



	September 30, 2018				December 31, 2017
Inventory	$	270.7			$	278.8
Prepaid taxes	70.2				43.5
Deferred costs	29.7				29.7
Prepaid expenses	19.5				14.2
Derivative asset	0.4				6.8
Other	13.5				8.2
	$	404.0			$	381.2

Other assets consisted of the following (in millions):



	September 30, 2018				December 31, 2017
Deferred tax assets	$	33.1			$	38.8
Supplemental executive retirement plan assets	30.5				30.9
Deferred costs	21.1				37.4
Intangible assets	5.4				15.7
Other	14.4				17.4
	$	104.5			$	140.2

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



	September 30, 2018				December 31, 2017
Personnel costs	$	80.9			$	112.0
Accrued interest	78.1				83.1
Deferred revenue	69.0				71.9
Taxes	46.8				46.4
Derivative liabilities	8.8				0.4
Other	26.4				12.1
	$	310.0			$	325.9

Other liabilities consisted of the following (in millions):



	September 30, 2018				December 31, 2017
Unrecognized tax benefits (inclusive of interest and penalties)	$	182.8			$	178.0
Deferred tax liabilities	62.7				18.5
Intangible liabilities	54.3				59.6
Supplemental executive retirement plan liabilities	32.1				32.0
Personnel costs	24.8				18.1
Deferred revenue	13.4				51.2
Deferred rent	12.1				17.1
Other	7.8				12.2
	$	390.0			$	386.7

Accumulated other comprehensive income consisted of the following (in millions):



	September 30, 2018				December 31, 2017
Derivative instruments	$	13.5			$	22.5
Currency translation adjustment	7.4				7.8
Other	(1.7		)		(1.7		)
	$	19.2			$	28.6

Concentration of Risk

We are exposed to credit risk related to our receivables from customers, our cash and cash equivalents, our short-term 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 our expectations. We mitigate our credit risk relating to cash and cash equivalents by focusing on diversification and quality of instruments. Cash equivalents consist of a portfolio of high-grade instruments. Custody of cash and cash equivalents 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 derivative counterparties 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. See "Note 5 - Derivative Instruments" for additional information on our derivatives.

Consolidated revenues by customer for the three-month and nine-month periods ended September 30, 2018 and 2017 were as follows:



	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Total⁽¹⁾	14	%		24	%		14	%		23	%
Saudi Aramco⁽²⁾	11	%		10	%		10	%		9	%
Petrobras⁽¹⁾	5	%		11	%		9	%		11	%
BP⁽³⁾	5	%		15	%		7	%		15	%
Other	65	%		40	%		60	%		42	%
	100	%		100	%		100	%		100	%


⁽¹⁾	During the three-month and nine-month periods ended September 30, 2018 and 2017, all revenues were attributable to our Floaters segment.


⁽²⁾	During the three-month and nine-month periods ended September 30, 2018 and 2017, all revenues were attributable to our Jackups segment.


⁽³⁾	During the three-month period ended September 30, 2018, 27% of the revenues provided by BP were attributable to our Jackups segment and the remainder was attributable to our Other segment. During the three-month period ended September 30, 2017, 78% of the revenues provided by BP were attributable to our Floaters segment and the remainder was attributable to our Other segment.

During the nine-month period ended September 30, 2018, 33% of the revenues provided by BP were attributable to our Floaters segment, 18% of the revenues were attributable to our Jackups segment and the remainder was attributable to our Other segment. During the nine-month period ended September 30, 2017, 78% of the revenues provided by BP were attributable to our Floaters segment and the remainder was attributable to our Other segment.

Consolidated revenues by region for the three-month and nine-month periods ended September 30, 2018 and 2017 were as follows:



	Three Months Ended September 30,								Nine Months Ended September 30,
	2018				2017				2018				2017
Angola⁽¹⁾	$	76.2			$	118.9			$	209.5			$	356.5
Australia⁽²⁾	75.1				48.7				207.7				158.6
U.S. Gulf of Mexico⁽³⁾	59.3				34.9				172.4				112.2
United Kingdom⁽⁴⁾	55.4				49.1				155.7				117.0
Saudi Arabia⁽⁴⁾	49.0				44.2				131.8				127.4
Brazil⁽⁵⁾	22.1				51.1				118.5				147.6
Egypt⁽⁵⁾	—				53.8				31.2				160.4
Other	93.8				59.5				279.6				209.1
	$	430.9			$	460.2			$	1,306.4			$	1,388.8

⁽¹⁾

During the three-month periods ended September 30, 2018 and 2017, 82% and 85% of the revenues earned in Angola, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment. During the nine-month periods ended September 30, 2018 and 2017, 87% and 86% of the revenues earned in Angola, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment.

⁽²⁾

During the three-month periods ended September 30, 2018 and 2017, 87% and 92% of the revenues earned in Australia, respectively, were attributable to our Floaters segment, and remaining revenues were attributable to our Jackups segment. During the nine-month periods ended September 30, 2018 and 2017, 94% and 83% of the revenues earned in Australia, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment.

⁽³⁾

During the three-month period ended September 30, 2018, 35% of the revenues earned in the U.S. Gulf of Mexico were attributable to our Floaters segment, 39% were attributable to our Jackups segment, and the remaining revenues were attributable to our Other segment. During the three-month period ended September 30, 2017, 21% of the revenues earned in the U.S. Gulf of Mexico were attributable to our Floaters segment, 35% were attributable to our Jackups segment and the remaining revenues were attributable to our Other segment. During the nine-month period ended September 30, 2018, 36% of revenues in the U.S. Gulf of Mexico were attributable to our Floaters segment, 38% were attributable to our Jackups segment, and the remaining revenues were attributable to our Other segment. During the nine-month period ended September 30, 2017, 24% of the revenues earned in the U.S. Gulf of Mexico were attributable to our Floaters segment, 37% were attributable to our Jackups segment, and the remaining revenues were attributable to our Other segment.


⁽⁴⁾	During the three-month and nine-month periods ended September 30, 2018 and 2017, all revenues earned in the United Kingdom and Saudi Arabia were attributable to our Jackups segment.


⁽⁵⁾	During the three-month and nine-month periods ended September 30, 2018 and 2017, all revenues earned in Brazil and Egypt were attributable to our Floaters segment.

Guarantee Of Registered Securities

9 Months Ended

Sep. 30, 2018

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 6.875% unsecured senior notes due 2020 and 7.875% unsecured senior notes due 2040, which had an aggregate outstanding principal balance of $422.9 million as of September 30, 2018. 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 International Incorporated, a wholly-owned subsidiary of Ensco plc, during 1997, which had an aggregate outstanding principal balance of $150.0 million as of September 30, 2018.

Pride and Ensco International Incorporated are 100% owned subsidiaries of Ensco plc. All guarantees are unsecured obligations of Ensco plc ranking equal in right of payment with all of its existing and future unsecured and unsubordinated indebtedness.

The following tables present the unaudited condensed consolidating statements of operations for the three-month and nine-month periods ended September 30, 2018 and 2017; the unaudited condensed consolidating statements of comprehensive income (loss) for the three-month and nine-month periods ended September 30, 2018 and 2017; the condensed consolidating balance sheets as of September 30, 2018 (unaudited) and December 31, 2017; and the unaudited condensed consolidating statements of cash flows for the nine-month periods ended September 30, 2018 and 2017, in accordance with Rule 3-10 of Regulation S-X.

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended September 30, 2018 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING REVENUES	$	12.1			$	40.7			$	—			$	459.2			$	(81.1	)		$	430.9
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	15.2				36.4				—				356.6				(81.1		)		327.1
Depreciation	—				3.6				—				117.0				—				120.6
General and administrative	10.5				1.9				—				12.7				—				25.1
OPERATING LOSS	(13.6		)		(1.2		)		—				(27.1		)		—				(41.9		)
OTHER EXPENSE, NET	(.6		)		(32.6		)		(19.5		)		(29.0		)		4.0				(77.7		)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(14.2		)		(33.8		)		(19.5		)		(56.1		)		4.0				(119.6		)
INCOME TAX PROVISION	—				9.5				—				13.8				—				23.3
DISCONTINUED OPERATIONS, NET	—				—				—				—				—				—
EQUITY EARNINGS (LOSSES) IN AFFILIATES, NET OF TAX	(130.8		)		28.2				23.1				—				79.5				—
NET INCOME (LOSS)	(145.0		)		(15.1		)		3.6				(69.9		)		83.5				(142.9		)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				(2.1		)		—				(2.1		)
NET INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(145.0	)		$	(15.1	)		$	3.6			$	(72.0	)		$	83.5			$	(145.0	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended September 30, 2017 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING REVENUES	$	13.0			$	47.2			$	—			$	490.1			$	(90.1	)		$	460.2
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	11.3				43.0				—				321.6				(90.1		)		285.8
Depreciation	—				4.0				—				104.2				—				108.2
General and administrative	10.3				5.1				—				15.0				—				30.4
OPERATING INCOME (LOSS)	(8.6		)		(4.9		)		—				49.3				—				35.8
OTHER INCOME (EXPENSE), NET	3.4				(28.0		)		(17.4		)		(1.0		)		2.6				(40.4		)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(5.2		)		(32.9		)		(17.4		)		48.3				2.6				(4.6		)
INCOME TAX PROVISION	—				11.6				—				11.8				—				23.4
DISCONTINUED OPERATIONS, NET	—				—				—				(.2		)		—				(.2		)
EQUITY EARNINGS (LOSSES) IN AFFILIATES, NET OF TAX	(20.2		)		29.9				23.2				—				(32.9		)		—
NET INCOME (LOSS)	(25.4		)		(14.6		)		5.8				36.3				(30.3		)		(28.2		)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				2.8				—				2.8
NET INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(25.4	)		$	(14.6	)		$	5.8			$	39.1			$	(30.3	)		$	(25.4	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Nine Months Ended September 30, 2018 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING REVENUES	$	36.7			$	120.8			$	—			$	1,387.0			$	(238.1	)		$	1,306.4
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	41.6				109.2				—				1,083.9				(238.1		)		996.6
Depreciation	—				10.6				—				345.9				—				356.5
General and administrative	31.0				2.2				—				45.9				—				79.1
OPERATING LOSS	(35.9		)		(1.2		)		—				(88.7		)		—				(125.8		)
OTHER EXPENSE, NET	(.1		)		(101.1		)		(69.5		)		(85.9		)		23.4				(233.2		)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(36.0		)		(102.3		)		(69.5		)		(174.6		)		23.4				(359.0		)
INCOME TAX PROVISION	—				32.4				—				34.0				—				66.4
DISCONTINUED OPERATIONS, NET	—				—				—				(8.1		)		—				(8.1		)
EQUITY EARNINGS (LOSSES) IN AFFILIATES, NET OF TAX	(400.1		)		77.7				69.1				—				253.3				—
NET LOSS	(436.1		)		(57.0		)		(.4		)		(216.7		)		276.7				(433.5		)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				(2.6		)		—				(2.6		)
NET LOSS ATTRIBUTABLE TO ENSCO	$	(436.1	)		$	(57.0	)		$	(.4	)		$	(219.3	)		$	276.7			$	(436.1	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Nine Months Ended September 30, 2017 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING REVENUES	$	38.5			$	137.1			$	—			$	1,477.3			$	(264.1	)		$	1,388.8
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	33.7				126.4				—				959.2				(264.1		)		855.2
Depreciation	—				12.5				—				312.8				—				325.3
General and administrative	33.9				9.4				—				43.6				—				86.9
OPERATING INCOME (LOSS)	(29.1		)		(11.2		)		—				161.7				—				121.4
OTHER EXPENSE, NET	(10.2		)		(86.2		)		(53.0		)		(13.6		)		11.7				(151.3		)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(39.3		)		(97.4		)		(53.0		)		148.1				11.7				(29.9		)
INCOME TAX PROVISION	—				30.5				—				36.3				—				66.8
DISCONTINUED OPERATIONS, NET	—				—				—				(.4		)		—				(.4		)
EQUITY EARNINGS (LOSSES) IN AFFILIATES, NET OF TAX	(57.3		)		113.5				69.4				—				(125.6		)		—
NET INCOME (LOSS)	(96.6		)		(14.4		)		16.4				111.4				(113.9		)		(97.1		)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				.5				—				.5
NET INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(96.6	)		$	(14.4	)		$	16.4			$	111.9			$	(113.9	)		$	(96.6	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

Three Months Ended September 30, 2018

(In millions)

(Unaudited)



	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
NET INCOME (LOSS)	$	(145.0	)		$	(15.1	)		$	3.6			$	(69.9	)		$	83.5			$	(142.9	)
OTHER COMPREHENSIVE LOSS, NET
Net change in derivative fair value	—				(1.9		)		—				—				—				(1.9		)
Reclassification of net losses on derivative instruments from other comprehensive loss into net income (loss)	—				.7				—				—				—				.7
Other	—				—				—				(.1		)		—				(.1		)
NET OTHER COMPREHENSIVE LOSS	—				(1.2		)		—				(.1		)		—				(1.3		)
COMPREHENSIVE INCOME (LOSS)	(145.0		)		(16.3		)		3.6				(70.0		)		83.5				(144.2		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				(2.1		)		—				(2.1		)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(145.0	)		$	(16.3	)		$	3.6			$	(72.1	)		$	83.5			$	(146.3	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

Three Months Ended September 30, 2017

(In millions)

(Unaudited)



	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
NET INCOME (LOSS)	$	(25.4	)		$	(14.6	)		$	5.8			$	36.3			$	(30.3	)		$	(28.2	)
OTHER COMPREHENSIVE INCOME, NET
Net change in derivative fair value	—				1.7				—				—				—				1.7
Reclassification of net gains on derivative instruments from other comprehensive income into net income (loss)	—				(.1		)		—				—				—				(.1		)
Other	—				—				—				.1				—				.1
NET OTHER COMPREHENSIVE INCOME	—				1.6				—				.1				—				1.7
COMPREHENSIVE INCOME (LOSS)	(25.4		)		(13.0		)		5.8				36.4				(30.3		)		(26.5		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				2.8				—				2.8
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(25.4	)		$	(13.0	)		$	5.8			$	39.2			$	(30.3	)		$	(23.7	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE LOSS

Nine Months Ended September 30, 2018

(In millions)

(Unaudited)



	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
NET LOSS	$	(436.1	)		$	(57.0	)		$	(.4	)		$	(216.7	)		$	276.7			$	(433.5	)
OTHER COMPREHENSIVE LOSS, NET
Net change in derivative fair value	—				(6.8		)		—				—				—				(6.8		)
Reclassification of net gains on derivative instruments from other comprehensive loss to net loss	—				(2.2		)		—				—				—				(2.2		)
Other	—				—				—				(.4		)		—				(.4		)
NET OTHER COMPREHENSIVE LOSS	—				(9.0		)		—				(.4		)		—				(9.4		)
COMPREHENSIVE LOSS	(436.1		)		(66.0		)		(.4		)		(217.1		)		276.7				(442.9		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				(2.6		)		—				(2.6		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$	(436.1	)		$	(66.0	)		$	(.4	)		$	(219.7	)		$	276.7			$	(445.5	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

Nine Months Ended September 30, 2017

(In millions)

(Unaudited)



	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
NET INCOME (LOSS)	$	(96.6	)		$	(14.4	)		$	16.4			$	111.4			$	(113.9	)		$	(97.1	)
OTHER COMPREHENSIVE INCOME, NET
Net change in derivative fair value	—				7.7				—				—				—				7.7
Reclassification of net losses on derivative instruments from other comprehensive income into net income (loss)	—				1.1				—				—				—				1.1
Other	—				—				—				.8				—				.8
NET OTHER COMPREHENSIVE INCOME	—				8.8				—				.8				—				9.6
COMPREHENSIVE INCOME (LOSS)	(96.6		)		(5.6		)		16.4				112.2				(113.9		)		(87.5		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				.5				—				.5
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(96.6	)		$	(5.6	)		$	16.4			$	112.7			$	(113.9	)		$	(87.0	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS September 30, 2018 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	146.7			$	—			$	5.9			$	43.4			$	—			$	196.0
Short-term investments	434.0				—				—				—				—				434.0
Accounts receivable, net	3.5				—				—				345.0				—				348.5
Accounts receivable from affiliates	1,066.9				455.3				2.1				412.9				(1,937.2		)		—
Other	.3				30.1				—				373.6				—				404.0
Total current assets	1,651.4				485.4				8.0				1,174.9				(1,937.2		)		1,382.5
PROPERTY AND EQUIPMENT, AT COST	1.8				125.4				—				15,417.2				—				15,544.4
Less accumulated depreciation	1.8				87.7				—				2,723.3				—				2,812.8
Property and equipment, net	—				37.7				—				12,693.9				—				12,731.6
DUE FROM AFFILIATES	3,150.1				430.8				150.0				2,173.6				(5,904.5		)		—
INVESTMENTS IN AFFILIATES	8,710.2				3,669.6				1,175.7				—				(13,555.5		)		—
OTHER ASSETS	8.8				139.0				—				—				(43.3		)		104.5
	$	13,520.5			$	4,762.5			$	1,333.7			$	16,042.4			$	(21,440.5	)		$	14,218.6
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	80.9			$	20.4			$	4.6			$	429.9			$	—			$	535.8
Accounts payable to affiliates	50.0				443.2				19.1				1,424.9				(1,937.2		)		—
Total current liabilities	130.9				463.6				23.7				1,854.8				(1,937.2		)		535.8
DUE TO AFFILIATES	1,424.4				1,391.3				1,403.4				1,685.4				(5,904.5		)		—
LONG-TERM DEBT	3,674.9				149.3				503.7				674.7				—				5,002.6
OTHER LIABILITIES	.1				51.9				—				381.3				(43.3		)		390.0
ENSCO SHAREHOLDERS' EQUITY (DEFICIT)	8,290.2				2,706.4				(597.1		)		11,448.4				(13,555.5		)		8,292.4
NONCONTROLLING INTERESTS	—				—				—				(2.2		)		—				(2.2		)
Total equity (deficit)	8,290.2				2,706.4				(597.1		)		11,446.2				(13,555.5		)		8,290.2
	$	13,520.5			$	4,762.5			$	1,333.7			$	16,042.4			$	(21,440.5	)		$	14,218.6

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2017 (In millions)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	185.2			$	—			$	25.6			$	234.6			$	—			$	445.4
Short-term investments	440.0				—				—				—				—				$	440.0
Accounts receivable, net	6.9				.4				—				338.1				—				345.4
Accounts receivable from affiliates	351.8				492.7				—				424.3				(1,268.8		)		—
Other	—				8.8				—				372.4				—				381.2
Total current assets	983.9				501.9				25.6				1,369.4				(1,268.8		)		1,612.0
PROPERTY AND EQUIPMENT, AT COST	1.8				120.8				—				15,209.5				—				15,332.1
Less accumulated depreciation	1.8				77.1				—				2,379.5				—				2,458.4
Property and equipment, net	—				43.7				—				12,830.0				—				12,873.7
DUE FROM AFFILIATES	3,002.1				2,618.0				165.1				3,736.1				(9,521.3		)		—
INVESTMENTS IN AFFILIATES	9,098.5				3,591.9				1,106.6				—				(13,797.0		)		—
OTHER ASSETS	12.9				5.0				—				226.5				(104.2		)		140.2
	$	13,097.4			$	6,760.5			$	1,297.3			$	18,162.0			$	(24,691.3	)		$	14,625.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	55.4			$	39.0			$	21.7			$	642.4			$	—			$	758.5
Accounts payable to affiliates	67.3				458.3				12.4				730.8				(1,268.8		)		—
Total current liabilities	122.7				497.3				34.1				1,373.2				(1,268.8		)		758.5
DUE TO AFFILIATES	1,402.9				3,559.2				753.9				3,805.3				(9,521.3		)		—
LONG-TERM DEBT	2,841.8				149.2				1,106.0				653.7				—				4,750.7
OTHER LIABILITIES	—				3.1				—				487.8				(104.2		)		386.7
ENSCO SHAREHOLDERS' EQUITY (DEFICIT)	8,730.0				2,551.7				(596.7		)		11,844.1				(13,797.0		)		8,732.1
NONCONTROLLING INTERESTS	—				—				—				(2.1		)		—				(2.1		)
Total equity (deficit)	8,730.0				2,551.7				(596.7		)		11,842.0				(13,797.0		)		8,730.0
	$	13,097.4			$	6,760.5			$	1,297.3			$	18,162.0			$	(24,691.3	)		$	14,625.9



ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Nine Months Ended September 30, 2018 (In millions) (Unaudited)
	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities of continuing operations	$	19.7			$	(257.2	)		$	(85.1	)		$	240.4			$	—			$	(82.2	)
INVESTING ACTIVITIES
Maturities of short-term investments	675.0				—				—				—				—				675.0
Purchases of short-term investments	(669.0		)		—				—				—				—				(669.0		)
Additions to property and equipment	—				—				—				(378.7		)		—				(378.7		)
Sale of affiliate debt	479.0				—				—				—				(479.0		)		—
Purchase of affiliate debt	(552.5		)		—				—				—				552.5				—
Other	—				—				—				10.0				—				10.0
Net cash used in investing activities of continuing operations	(67.5		)		—				—				(368.7		)		73.5				(362.7		)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	1,000.0				—				—				—				—				1,000.0
Reduction of long-term borrowings	(159.9		)		—				(537.8		)		—				(73.5		)		(771.2		)
Debt issuance costs	(17.0		)		—				—				—				—				(17.0		)
Cash dividends paid	(13.4		)		—				—				—				—				(13.4		)
Advances from (to) affiliates	(798.5		)		257.2				603.2				(61.9		)		—				—
Other	(1.9		)		—				—				(2.8		)		—				(4.7		)
Net cash provided by (used in) financing activities	9.3				257.2				65.4				(64.7		)		(73.5		)		193.7
Net cash provided by discontinued operations	—				—				—				2.5				—				2.5
Effect of exchange rate changes on cash and cash equivalents	—				—				—				(.7		)		—				(.7		)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(38.5		)		—				(19.7		)		(191.2		)		—				(249.4		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	185.2				—				25.6				234.6				—				445.4
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	146.7			$	—			$	5.9			$	43.4			$	—			$	196.0



ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Nine Months Ended September 30, 2017 (In millions) (Unaudited)
	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities of continuing operations	$	(17.3	)		$	(68.4	)		$	(84.9	)		$	390.2			$	—			$	219.6
INVESTING ACTIVITIES
Maturities of short-term investments	1,123.1				5.5				—				284.1				—				1,412.7
Purchases of short-term investments	(1,023.0		)		—				—				(17.0		)		—				(1,040.0		)
Additions to property and equipment	—				—				—				(474.1		)		—				(474.1		)
Purchase of affiliate debt	(316.3		)		—				—				—				316.3				—
Other	—				—				—				2.6				—				2.6
Net cash provided by (used in) investing activities of continuing operations	(216.2		)		5.5				—				(204.4		)		316.3				(98.8		)
FINANCING ACTIVITIES
Reduction of long-term borrowings	(220.7		)		—				—				—				(316.3		)		(537.0		)
Cash dividends paid	(9.4		)		—				—				—				—				(9.4		)
Debt issuance costs	(5.5		)		—				—				—				—				(5.5		)
Advances from affiliates	95.1				62.9				85.6				(243.6		)		—				—
Other	(2.6		)		—				—				(1.9		)		—				(4.5		)
Net cash provided by (used in) financing activities	(143.1		)		62.9				85.6				(245.5		)		(316.3		)		(556.4		)
Net cash used in discontinued operations	—				—				—				(.4		)		—				(0.4		)
Effect of exchange rate changes on cash and cash equivalents	—				—				—				.7				—				.7
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(376.6		)		—				.7				(59.4		)		—				(435.3		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	892.6				—				19.8				247.3				—				1,159.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	516.0			$	—			$	20.5			$	187.9			$	—			$	724.4

Unaudited Condensed Consolidated Financial Statements (Policies)	9 Months Ended
	Sep. 30, 2018
Unaudited Condensed Consolidated Financial Statements [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements In August 2018, the FASB issued Update 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract ("Update 2018-15"), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that included an internal-use software license). This update is effective for fiscal years beginning after December 15, 2020 and interim periods within those fiscal years, with early adoption permitted. We are currently evaluating the effect that Update 2018-15 will have on our consolidated financial statements and related disclosures. In February 2018, the Financial Accounting Standards Board (the "FASB") issued Update 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income ("Update 2018-02"), which allows for a reclassification from accumulated other comprehensive income (AOCI) to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. This update is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years, with early adoption permitted. We adopted Update 2018-02 effective January 1, 2018. As a result, we reclassified a total of $800,000 in tax effects from AOCI to opening retained earnings. In August 2017, the FASB issued Update 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities ("Update 2017-12"), which will make more hedging strategies eligible for hedge accounting. It also amends presentation and disclosure requirements and changes how companies assess effectiveness. This update is effective for annual and interim periods beginning after December 15, 2018, with early adoption permitted. We are currently evaluating the effect that Update 2017-12 will have on our consolidated financial statements and related disclosures. During 2016, the FASB issued Update 2016-02, Leases (Topic 842) ("Update 2016-02"), which requires an entity to recognize lease assets and lease liabilities on the balance sheet and to disclose key qualitative and quantitative information about the entity's leasing arrangements. This update is effective for annual and interim periods beginning after December 15, 2018, with early adoption permitted. During our evaluation of Update 2016-02, we concluded that our drilling contracts contain a lease component. In July 2018, the FASB issued Accounting Standard Update 2018-11, Leases (Topic 842), Target Improvements, which (1) provides for a new transition method whereby entities may elect to adopt the Update using a prospective with cumulative catch-up approach and (2) provides lessors with a practical expedient, by class of underlying asset, to not separate lease and non-lease components when the non-lease component is the predominant element of the combined component. The lessor practical expedient is limited to circumstances in which the non-lease component otherwise would be accounted for under Topic 606 (discussed below). We are currently evaluating the effect these Updates will have on our consolidated financial statements and related disclosures. With respect to leases whereby we are the lessee, we expect to recognize upon adoption on January 1, 2019 lease liabilities and offsetting "right of use" assets ranging from approximately $55 million to $75 million. During 2014, the FASB issued Update 2014-09, Revenue from Contracts with Customers (Topic 606) ("Update 2014-09"), which requires entities to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. Update 2014-09 is effective for annual and interim periods for fiscal years beginning after December 15, 2017. We adopted Update 2014-09 effective January 1, 2018, using the modified retrospective approach. Only customer contracts that were not completed as of the effective adoption date were evaluated under the transition guidance to determine if a cumulative catch-up adjustment to retained earnings was warranted. Revenues recognized in prior years for customer contracts that expired prior to the effective adoption date continue to be reported under the previous revenue recognition guidance. Our adoption of Update 2014-09 did not result in a cumulative effect on retained earnings and no adjustments were made to prior periods. While Update 2014-09 requires additional disclosure regarding revenues recognized from customer contracts, our adoption did not have a material impact on the recognition of current or prior period revenues as compared to previous guidance nor do we expect a material impact to our pattern of revenue recognition in future periods. See "Note 2 - Revenue from Contracts with Customers" for additional information.

Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

The following table summarizes our trade receivables, contract assets and contract liabilities (in millions):



	September 30, 2018				December 31, 2017
Current contract assets	$	3.0			$	3.0
Noncurrent contract assets	$	—			$	2.8
Current contract liabilities (deferred revenue)	$	69.0			$	71.9
Noncurrent contract liabilities (deferred revenue)	$	13.4			$	51.2

Significant changes in contract assets and liabilities during the period are as follows (in millions):



	Contract Assets				Contract Liabilities
Balance as of December 31, 2017	$	5.8			$	123.1
Increase due to cash received	—				32.0
Decrease due to amortization of deferred revenue that was included in the beginning contract liability balance	—				(57.6		)
Decrease due to amortization of deferred revenue that was added during the period	—				(15.1		)
Decrease due to transfer to receivables during the period	(2.8		)		—
Balance as of September 30, 2018	$	3.0			$	82.4

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

Expected future amortization of our contract liabilities and deferred costs recorded as of September 30, 2018 is set forth in the table below (in millions):



	Remaining 2018				2019				2020				2021 and Thereafter				Total
Amortization of contract liabilities	$	23.3			$	48.5			$	6.4			$	4.2			$	82.4
Amortization of deferred costs	$	11.4			$	21.1			$	6.8			$	2.7			$	42.0

Acquisition of Atwood (Tables)

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The provisional amounts recorded for assets acquired and liabilities assumed as of the Merger Date and respective measurement period adjustments were as follows (in millions):



	Amounts Recognized as of Merger Date				Measurement Period Adjustments ⁽¹⁾				Estimated Fair Value
Assets:
Cash and cash equivalents⁽²⁾	$	445.4			$	—			$	445.4
Accounts receivable⁽³⁾	62.3				(1.6		)		60.7
Other current assets	118.1				4.6				122.7
Property and equipment	1,762.0				9.2				1,771.2
Other assets	23.7				(5.1		)		18.6
Liabilities:
Accounts payable and accrued liabilities	64.9				(1.1		)		63.8
Other liabilities	118.7				6.4				125.1
Net assets acquired	2,227.9				1.8				2,229.7
Less:
Merger consideration	(781.8		)						(781.8		)
Repayment of Atwood debt	(1,305.9		)						(1,305.9		)
Bargain purchase gain	$	140.2							$	142.0

⁽¹⁾

The measurement period adjustments reflect changes in the estimated fair values of certain assets and liabilities, primarily related to inventory, capital equipment and other liabilities. The measurement period adjustments were recorded to reflect new information obtained about facts and circumstances existing as of the Merger Date and did not result from subsequent intervening events. The adjustments recorded resulted in a $6.5 million decrease and a $1.8 million increase to bargain purchase gain during the three-month and nine-month periods ended September 30, 2018, respectively, and are included in other, net, in our condensed consolidated statements of operations.


⁽²⁾	Upon closing of the Merger, we utilized acquired cash of $445.4 million and cash on hand from the liquidation of short-term investments to repay Atwood's debt and accrued interest of $1.3 billion.

⁽³⁾Gross contractual amounts receivable totaled $64.7 million as of the Merger Date.

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

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 financial assets and liabilities measured at fair value on a recurring basis (in millions):



	Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)				Total
As of September 30, 2018
Supplemental executive retirement plan assets	$	30.5			$	—			$	—			$	30.5
Total financial assets	$	30.5			$	—			$	—			$	30.5
Derivatives, net	$	—			$	(8.9	)		$	—			$	(8.9	)
Total financial liabilities	$	—			$	(8.9	)		$	—			$	(8.9	)

As of December 31, 2017
Supplemental executive retirement plan assets	$	30.9			$	—			$	—			$	30.9
Derivatives, net	—				6.8				—				6.8
Total financial assets	$	30.9			$	6.8			$	—			$	37.7

Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments

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



	September 30, 2018								December 31, 2017
	Carrying Value				Estimated Fair Value				Carrying Value				Estimated Fair Value
8.50% Senior notes due 2019⁽¹⁾	$	—			$	—			$	251.4			$	252.9
6.875% Senior notes due 2020⁽¹⁾	128.2				128.3				477.9				473.1
4.70% Senior notes due 2021⁽¹⁾	112.6				110.9				267.1				265.3
3.00% Exchangeable senior notes due 2024⁽²⁾	658.9				851.6				635.7				757.1
4.50% Senior notes due 2024	619.7				537.3				619.3				527.1
8.00% Senior notes due 2024	337.2				336.7				337.9				333.8
5.20% Senior notes due 2025	664.2				585.6				663.6				571.4
7.75% Senior notes due 2026	984.4				995.0				—				—
7.20% Debentures due 2027	149.3				141.7				149.3				141.9
7.875% Senior notes due 2040	375.5				285.1				376.7				258.8
5.75% Senior notes due 2044	972.6				752.6				971.8				690.4
Total	$	5,002.6			$	4,724.8			$	4,750.7			$	4,271.8


⁽¹⁾	The reduction in carrying value of our senior notes due 2019, 2020 and 2021 resulted from repurchases and redemptions during the first quarter 2018. See "Note 7 - Debt" for additional information.

⁽²⁾

Our exchangeable senior notes due 2024 (the "2024 Convertible Notes") were issued with a conversion feature. The 2024 Convertible Notes were separated into their liability and equity components on our condensed consolidated balance sheet. The equity component was initially recorded to additional paid-in capital and as a debt discount that will be amortized to interest expense over the life of the instrument. Excluding the unamortized discount, the carrying value of the 2024 Convertible Notes was $835.7 million and $834.0 million as of September 30, 2018 and December 31, 2017, respectively.

Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule Of Derivatives At Fair Value

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



	Derivative Assets								Derivative Liabilities
	September 30, 2018				December 31, 2017				September 30, 2018				December 31, 2017
Derivatives Designated as Hedging Instruments
Foreign currency forward contracts - current⁽¹⁾	$	.2			$	5.9			$	7.0			$	.2
Foreign currency forward contracts - non-current⁽²⁾	—				.5				.5				.1
	.2				6.4				7.5				.3

Derivatives Not Designated as Hedging Instruments
Foreign currency forward contracts - current⁽¹⁾	.2				.9				1.8				.2
Total	$	.4			$	7.3			$	9.3			$	.5


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


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

Gains And Losses On Derivatives Designated As Cash Flow Hedges

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

Three Months Ended September 30, 2018 and 2017



	Gain (Loss) Recognized in Other Comprehensive Income (Loss) (Effective Portion)								Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)⁽¹⁾								Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)⁽²⁾
	2018				2017				2018				2017				2018				2017
Interest rate lock contracts⁽³⁾	$	—			$	—			$	(.1	)		$	(.1	)		$	—			$	—
Foreign currency forward contracts⁽⁴⁾	(1.9		)		1.7				(.6		)		.2				(.3		)		.3
Total	$	(1.9	)		$	1.7			$	(.7	)		$	.1			$	(.3	)		$	.3

Nine Months Ended September 30, 2018 and 2017



	Gain (Loss) Recognized in Other Comprehensive Income (Loss) (Effective Portion)								Gain (Loss) Reclassified from AOCI into Income (Effective Portion)⁽¹⁾								Loss Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)⁽²⁾
	2018				2017				2018				2017				2018				2017
Interest rate lock contracts⁽³⁾	$	—			$	—			$	(.2	)		$	(.3	)		$	—			$	—
Foreign currency forward contracts⁽⁵⁾	(6.8		)		7.7				2.4				(.8		)		(1.5		)		(.1		)
Total	$	(6.8	)		$	7.7			$	2.2			$	(1.1	)		$	(1.5	)		$	(.1	)


⁽¹⁾	Changes in the effective portion of cash flow hedge fair values 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 condensed consolidated statements of operations.


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

⁽⁴⁾

During the three-month period ended September 30, 2018, there were $800,000 of losses reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the three-month period ended September 30, 2017, there were no net amounts reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations.

⁽⁵⁾

During the nine-month period ended September 30, 2018, $1.8 million of gains were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the nine-month period ended September 30, 2017, $1.4 million of losses were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations.

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Reconciliation Of Net Income Attributable To Ensco Shares

The following table is a reconciliation of loss from continuing operations attributable to Ensco shares used in our basic and diluted EPS computations for the three-month and nine-month periods ended September 30, 2018 and 2017 (in millions):



	Three Months Ended September 30,								Nine Months Ended September 30,
	2018				2017				2018				2017
Loss from continuing operations attributable to Ensco	$	(145.0	)		$	(25.2	)		$	(428.0	)		$	(96.2	)
Income from continuing operations allocated to non-vested share awards⁽¹⁾	(.2		)		(.1		)		(.4		)		(.3		)
Loss from continuing operations attributable to Ensco shares	$	(145.2	)		$	(25.3	)		$	(428.4	)		$	(96.5	)


⁽¹⁾	Losses are not allocated to non-vested share awards. Therefore, only dividends attributable to our non-vested share awards are included for the three-month and nine-month periods ended September 30, 2018 and 2017.

Debt (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of Extinguishment of Debt

The following table sets forth the total principal amounts repurchased as a result of the tender offers, redemption and repurchase (in millions):



	Aggregate Principal Amount Repurchased				Aggregate Repurchase Price⁽¹⁾
8.50% Senior notes due 2019	$	237.6			$	256.8
6.875% Senior notes due 2020	328.0				354.7
4.70% Senior notes due 2021	156.2				159.7
Total	$	721.8			$	771.2


⁽¹⁾	Excludes accrued interest paid to holders of the repurchased senior notes.

Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Schedule Of Segment Reporting Information

Three Months Ended September 30, 2018



	Floaters				Jackups				Other				Operating Segments Total				Reconciling Items				Consolidated Total
Revenues	$	241.8			$	173.3			$	15.8			$	430.9			$	—			$	430.9
Operating expenses
Contract drilling (exclusive of depreciation)	175.6				136.4				15.1				327.1				—				327.1
Depreciation	77.8				39.3				—				117.1				3.5				120.6
General and administrative	—				—				—				—				25.1				25.1
Operating income (loss)	$	(11.6	)		$	(2.4	)		$	0.7			$	(13.3	)		$	(28.6	)		$	(41.9	)
Property and equipment, net	$	9,501.7			$	3,190.2			$	—			$	12,691.9			$	39.7			$	12,731.6

Three Months Ended September 30, 2017



	Floaters				Jackups				Other				Operating Segments Total				Reconciling Items				Consolidated Total
Revenues	$	291.9			$	153.1			$	15.2			$	460.2			$	—			$	460.2
Operating expenses
Contract drilling (exclusive of depreciation)	139.1				132.9				13.8				285.8				—				285.8
Depreciation	72.7				31.6				—				104.3				3.9				108.2
General and administrative	—				—				—				—				30.4				30.4
Operating income (loss)	$	80.1			$	(11.4	)		$	1.4			$	70.1			$	(34.3	)		$	35.8
Property and equipment, net	$	8,545.5			$	2,502.4			$	—			$	11,047.9			$	48.5			$	11,096.4

Nine Months Ended September 30, 2018



	Floaters				Jackups				Other				Operating Segments Total				Reconciling Items				Consolidated Total
Revenues	$	785.7			$	475.4			$	45.3			$	1,306.4			$	—			$	1,306.4
Operating expenses
Contract drilling (exclusive of depreciation)	564.4				390.1				42.1				996.6				—				996.6
Depreciation	233.9				112.3				—				346.2				10.3				356.5
General and administrative	—				—				—				—				79.1				79.1
Operating income (loss)	$	(12.6	)		$	(27.0	)		$	3.2			$	(36.4	)		$	(89.4	)		$	(125.8	)
Property and equipment, net	$	9,501.7			$	3,190.2			$	—			$	12,691.9			$	39.7			$	12,731.6

Nine Months Ended September 30, 2017



	Floaters				Jackups				Other				Operating Segments Total				Reconciling Items				Consolidated Total
Revenues	$	840.7			$	503.8			$	44.3			$	1,388.8			$	—			$	1,388.8
Operating expenses
Contract drilling (exclusive of depreciation)	431.1				383.8				40.3				855.2				—				855.2
Depreciation	217.5				95.3				—				312.8				12.5				325.3
General and administrative	—				—				—				—				86.9				86.9
Operating income	$	192.1			$	24.7			$	4.0			$	220.8			$	(99.4	)		$	121.4
Property and equipment, net	$	8,545.5			$	2,502.4			$	—			$	11,047.9			$	48.5			$	11,096.4

Schedule Of Geographic Distribution Of Rigs By Segment

As of September 30, 2018, the geographic distribution of our drilling rigs by reportable segment was as follows:



	Floaters		Jackups		Total⁽¹⁾
North & South America	8		4		12
Europe & Mediterranean	6		11		17
Middle East & Africa	3		12		15
Asia & Pacific Rim	5		7		12
Asia & Pacific Rim (under construction)	2		1		3
Total	24		35		59


⁽¹⁾	We provide management services on two rigs owned by third-parties in the U.S. Gulf of Mexico, which are not included in the table above.

Supplemental Financial Information (Tables)

9 Months Ended

Sep. 30, 2018

Supplemental Financial Information [Abstract]

Accounts Receivable, Net

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



	September 30, 2018				December 31, 2017
Trade	$	334.7			$	335.4
Other	17.7				33.6
	352.4				369.0
Allowance for doubtful accounts	(3.9		)		(23.6		)
	$	348.5			$	345.4

Other Current Assets

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



	September 30, 2018				December 31, 2017
Inventory	$	270.7			$	278.8
Prepaid taxes	70.2				43.5
Deferred costs	29.7				29.7
Prepaid expenses	19.5				14.2
Derivative asset	0.4				6.8
Other	13.5				8.2
	$	404.0			$	381.2

Other Assets, Net

Other assets consisted of the following (in millions):



	September 30, 2018				December 31, 2017
Deferred tax assets	$	33.1			$	38.8
Supplemental executive retirement plan assets	30.5				30.9
Deferred costs	21.1				37.4
Intangible assets	5.4				15.7
Other	14.4				17.4
	$	104.5			$	140.2

Accrued Liabilities And Other

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



	September 30, 2018				December 31, 2017
Personnel costs	$	80.9			$	112.0
Accrued interest	78.1				83.1
Deferred revenue	69.0				71.9
Taxes	46.8				46.4
Derivative liabilities	8.8				0.4
Other	26.4				12.1
	$	310.0			$	325.9

Other Liabilities

Other liabilities consisted of the following (in millions):



	September 30, 2018				December 31, 2017
Unrecognized tax benefits (inclusive of interest and penalties)	$	182.8			$	178.0
Deferred tax liabilities	62.7				18.5
Intangible liabilities	54.3				59.6
Supplemental executive retirement plan liabilities	32.1				32.0
Personnel costs	24.8				18.1
Deferred revenue	13.4				51.2
Deferred rent	12.1				17.1
Other	7.8				12.2
	$	390.0			$	386.7

Accumulated other comprehensive income

Accumulated other comprehensive income consisted of the following (in millions):



	September 30, 2018				December 31, 2017
Derivative instruments	$	13.5			$	22.5
Currency translation adjustment	7.4				7.8
Other	(1.7		)		(1.7		)
	$	19.2			$	28.6

Schedule of Revenue by Major Customers by Reporting Segments

Consolidated revenues by customer for the three-month and nine-month periods ended September 30, 2018 and 2017 were as follows:



	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Total⁽¹⁾	14	%		24	%		14	%		23	%
Saudi Aramco⁽²⁾	11	%		10	%		10	%		9	%
Petrobras⁽¹⁾	5	%		11	%		9	%		11	%
BP⁽³⁾	5	%		15	%		7	%		15	%
Other	65	%		40	%		60	%		42	%
	100	%		100	%		100	%		100	%


⁽¹⁾	During the three-month and nine-month periods ended September 30, 2018 and 2017, all revenues were attributable to our Floaters segment.


⁽²⁾	During the three-month and nine-month periods ended September 30, 2018 and 2017, all revenues were attributable to our Jackups segment.


⁽³⁾	During the three-month period ended September 30, 2018, 27% of the revenues provided by BP were attributable to our Jackups segment and the remainder was attributable to our Other segment. During the three-month period ended September 30, 2017, 78% of the revenues provided by BP were attributable to our Floaters segment and the remainder was attributable to our Other segment.

During the nine-month period ended September 30, 2018, 33% of the revenues provided by BP were attributable to our Floaters segment, 18% of the revenues were attributable to our Jackups segment and the remainder was attributable to our Other segment. During the nine-month period ended September 30, 2017, 78% of the revenues provided by BP were attributable to our Floaters segment and the remainder was attributable to our Other segment.

Revenue from External Customers by Geographic Areas

Consolidated revenues by region for the three-month and nine-month periods ended September 30, 2018 and 2017 were as follows:



	Three Months Ended September 30,								Nine Months Ended September 30,
	2018				2017				2018				2017
Angola⁽¹⁾	$	76.2			$	118.9			$	209.5			$	356.5
Australia⁽²⁾	75.1				48.7				207.7				158.6
U.S. Gulf of Mexico⁽³⁾	59.3				34.9				172.4				112.2
United Kingdom⁽⁴⁾	55.4				49.1				155.7				117.0
Saudi Arabia⁽⁴⁾	49.0				44.2				131.8				127.4
Brazil⁽⁵⁾	22.1				51.1				118.5				147.6
Egypt⁽⁵⁾	—				53.8				31.2				160.4
Other	93.8				59.5				279.6				209.1
	$	430.9			$	460.2			$	1,306.4			$	1,388.8

⁽¹⁾

During the three-month periods ended September 30, 2018 and 2017, 82% and 85% of the revenues earned in Angola, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment. During the nine-month periods ended September 30, 2018 and 2017, 87% and 86% of the revenues earned in Angola, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment.

⁽²⁾

During the three-month periods ended September 30, 2018 and 2017, 87% and 92% of the revenues earned in Australia, respectively, were attributable to our Floaters segment, and remaining revenues were attributable to our Jackups segment. During the nine-month periods ended September 30, 2018 and 2017, 94% and 83% of the revenues earned in Australia, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment.

⁽³⁾

During the three-month period ended September 30, 2018, 35% of the revenues earned in the U.S. Gulf of Mexico were attributable to our Floaters segment, 39% were attributable to our Jackups segment, and the remaining revenues were attributable to our Other segment. During the three-month period ended September 30, 2017, 21% of the revenues earned in the U.S. Gulf of Mexico were attributable to our Floaters segment, 35% were attributable to our Jackups segment and the remaining revenues were attributable to our Other segment. During the nine-month period ended September 30, 2018, 36% of revenues in the U.S. Gulf of Mexico were attributable to our Floaters segment, 38% were attributable to our Jackups segment, and the remaining revenues were attributable to our Other segment. During the nine-month period ended September 30, 2017, 24% of the revenues earned in the U.S. Gulf of Mexico were attributable to our Floaters segment, 37% were attributable to our Jackups segment, and the remaining revenues were attributable to our Other segment.


⁽⁴⁾	During the three-month and nine-month periods ended September 30, 2018 and 2017, all revenues earned in the United Kingdom and Saudi Arabia were attributable to our Jackups segment.


⁽⁵⁾	During the three-month and nine-month periods ended September 30, 2018 and 2017, all revenues earned in Brazil and Egypt were attributable to our Floaters segment.

Guarantee Of Registered Securities (Tables)

9 Months Ended

Sep. 30, 2018

Guarantees [Abstract]

Condensed Consolidating Statements Of Operations

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended September 30, 2018 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING REVENUES	$	12.1			$	40.7			$	—			$	459.2			$	(81.1	)		$	430.9
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	15.2				36.4				—				356.6				(81.1		)		327.1
Depreciation	—				3.6				—				117.0				—				120.6
General and administrative	10.5				1.9				—				12.7				—				25.1
OPERATING LOSS	(13.6		)		(1.2		)		—				(27.1		)		—				(41.9		)
OTHER EXPENSE, NET	(.6		)		(32.6		)		(19.5		)		(29.0		)		4.0				(77.7		)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(14.2		)		(33.8		)		(19.5		)		(56.1		)		4.0				(119.6		)
INCOME TAX PROVISION	—				9.5				—				13.8				—				23.3
DISCONTINUED OPERATIONS, NET	—				—				—				—				—				—
EQUITY EARNINGS (LOSSES) IN AFFILIATES, NET OF TAX	(130.8		)		28.2				23.1				—				79.5				—
NET INCOME (LOSS)	(145.0		)		(15.1		)		3.6				(69.9		)		83.5				(142.9		)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				(2.1		)		—				(2.1		)
NET INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(145.0	)		$	(15.1	)		$	3.6			$	(72.0	)		$	83.5			$	(145.0	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended September 30, 2017 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING REVENUES	$	13.0			$	47.2			$	—			$	490.1			$	(90.1	)		$	460.2
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	11.3				43.0				—				321.6				(90.1		)		285.8
Depreciation	—				4.0				—				104.2				—				108.2
General and administrative	10.3				5.1				—				15.0				—				30.4
OPERATING INCOME (LOSS)	(8.6		)		(4.9		)		—				49.3				—				35.8
OTHER INCOME (EXPENSE), NET	3.4				(28.0		)		(17.4		)		(1.0		)		2.6				(40.4		)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(5.2		)		(32.9		)		(17.4		)		48.3				2.6				(4.6		)
INCOME TAX PROVISION	—				11.6				—				11.8				—				23.4
DISCONTINUED OPERATIONS, NET	—				—				—				(.2		)		—				(.2		)
EQUITY EARNINGS (LOSSES) IN AFFILIATES, NET OF TAX	(20.2		)		29.9				23.2				—				(32.9		)		—
NET INCOME (LOSS)	(25.4		)		(14.6		)		5.8				36.3				(30.3		)		(28.2		)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				2.8				—				2.8
NET INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(25.4	)		$	(14.6	)		$	5.8			$	39.1			$	(30.3	)		$	(25.4	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Nine Months Ended September 30, 2018 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING REVENUES	$	36.7			$	120.8			$	—			$	1,387.0			$	(238.1	)		$	1,306.4
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	41.6				109.2				—				1,083.9				(238.1		)		996.6
Depreciation	—				10.6				—				345.9				—				356.5
General and administrative	31.0				2.2				—				45.9				—				79.1
OPERATING LOSS	(35.9		)		(1.2		)		—				(88.7		)		—				(125.8		)
OTHER EXPENSE, NET	(.1		)		(101.1		)		(69.5		)		(85.9		)		23.4				(233.2		)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(36.0		)		(102.3		)		(69.5		)		(174.6		)		23.4				(359.0		)
INCOME TAX PROVISION	—				32.4				—				34.0				—				66.4
DISCONTINUED OPERATIONS, NET	—				—				—				(8.1		)		—				(8.1		)
EQUITY EARNINGS (LOSSES) IN AFFILIATES, NET OF TAX	(400.1		)		77.7				69.1				—				253.3				—
NET LOSS	(436.1		)		(57.0		)		(.4		)		(216.7		)		276.7				(433.5		)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				(2.6		)		—				(2.6		)
NET LOSS ATTRIBUTABLE TO ENSCO	$	(436.1	)		$	(57.0	)		$	(.4	)		$	(219.3	)		$	276.7			$	(436.1	)

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Nine Months Ended September 30, 2017 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING REVENUES	$	38.5			$	137.1			$	—			$	1,477.3			$	(264.1	)		$	1,388.8
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	33.7				126.4				—				959.2				(264.1		)		855.2
Depreciation	—				12.5				—				312.8				—				325.3
General and administrative	33.9				9.4				—				43.6				—				86.9
OPERATING INCOME (LOSS)	(29.1		)		(11.2		)		—				161.7				—				121.4
OTHER EXPENSE, NET	(10.2		)		(86.2		)		(53.0		)		(13.6		)		11.7				(151.3		)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(39.3		)		(97.4		)		(53.0		)		148.1				11.7				(29.9		)
INCOME TAX PROVISION	—				30.5				—				36.3				—				66.8
DISCONTINUED OPERATIONS, NET	—				—				—				(.4		)		—				(.4		)
EQUITY EARNINGS (LOSSES) IN AFFILIATES, NET OF TAX	(57.3		)		113.5				69.4				—				(125.6		)		—
NET INCOME (LOSS)	(96.6		)		(14.4		)		16.4				111.4				(113.9		)		(97.1		)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				.5				—				.5
NET INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(96.6	)		$	(14.4	)		$	16.4			$	111.9			$	(113.9	)		$	(96.6	)

Condensed Consolidating Statements Of Comprehensive Income

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

Three Months Ended September 30, 2018

(In millions)

(Unaudited)



	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
NET INCOME (LOSS)	$	(145.0	)		$	(15.1	)		$	3.6			$	(69.9	)		$	83.5			$	(142.9	)
OTHER COMPREHENSIVE LOSS, NET
Net change in derivative fair value	—				(1.9		)		—				—				—				(1.9		)
Reclassification of net losses on derivative instruments from other comprehensive loss into net income (loss)	—				.7				—				—				—				.7
Other	—				—				—				(.1		)		—				(.1		)
NET OTHER COMPREHENSIVE LOSS	—				(1.2		)		—				(.1		)		—				(1.3		)
COMPREHENSIVE INCOME (LOSS)	(145.0		)		(16.3		)		3.6				(70.0		)		83.5				(144.2		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				(2.1		)		—				(2.1		)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(145.0	)		$	(16.3	)		$	3.6			$	(72.1	)		$	83.5			$	(146.3	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

Three Months Ended September 30, 2017

(In millions)

(Unaudited)



	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
NET INCOME (LOSS)	$	(25.4	)		$	(14.6	)		$	5.8			$	36.3			$	(30.3	)		$	(28.2	)
OTHER COMPREHENSIVE INCOME, NET
Net change in derivative fair value	—				1.7				—				—				—				1.7
Reclassification of net gains on derivative instruments from other comprehensive income into net income (loss)	—				(.1		)		—				—				—				(.1		)
Other	—				—				—				.1				—				.1
NET OTHER COMPREHENSIVE INCOME	—				1.6				—				.1				—				1.7
COMPREHENSIVE INCOME (LOSS)	(25.4		)		(13.0		)		5.8				36.4				(30.3		)		(26.5		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				2.8				—				2.8
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(25.4	)		$	(13.0	)		$	5.8			$	39.2			$	(30.3	)		$	(23.7	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE LOSS

Nine Months Ended September 30, 2018

(In millions)

(Unaudited)



	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
NET LOSS	$	(436.1	)		$	(57.0	)		$	(.4	)		$	(216.7	)		$	276.7			$	(433.5	)
OTHER COMPREHENSIVE LOSS, NET
Net change in derivative fair value	—				(6.8		)		—				—				—				(6.8		)
Reclassification of net gains on derivative instruments from other comprehensive loss to net loss	—				(2.2		)		—				—				—				(2.2		)
Other	—				—				—				(.4		)		—				(.4		)
NET OTHER COMPREHENSIVE LOSS	—				(9.0		)		—				(.4		)		—				(9.4		)
COMPREHENSIVE LOSS	(436.1		)		(66.0		)		(.4		)		(217.1		)		276.7				(442.9		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				(2.6		)		—				(2.6		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$	(436.1	)		$	(66.0	)		$	(.4	)		$	(219.7	)		$	276.7			$	(445.5	)

ENSCO PLC AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

Nine Months Ended September 30, 2017

(In millions)

(Unaudited)



	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
NET INCOME (LOSS)	$	(96.6	)		$	(14.4	)		$	16.4			$	111.4			$	(113.9	)		$	(97.1	)
OTHER COMPREHENSIVE INCOME, NET
Net change in derivative fair value	—				7.7				—				—				—				7.7
Reclassification of net losses on derivative instruments from other comprehensive income into net income (loss)	—				1.1				—				—				—				1.1
Other	—				—				—				.8				—				.8
NET OTHER COMPREHENSIVE INCOME	—				8.8				—				.8				—				9.6
COMPREHENSIVE INCOME (LOSS)	(96.6		)		(5.6		)		16.4				112.2				(113.9		)		(87.5		)
COMPREHENSIVE LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—				—				—				.5				—				.5
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSCO	$	(96.6	)		$	(5.6	)		$	16.4			$	112.7			$	(113.9	)		$	(87.0	)

Condensed Consolidating Balance Sheets

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS September 30, 2018 (In millions) (Unaudited)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	146.7			$	—			$	5.9			$	43.4			$	—			$	196.0
Short-term investments	434.0				—				—				—				—				434.0
Accounts receivable, net	3.5				—				—				345.0				—				348.5
Accounts receivable from affiliates	1,066.9				455.3				2.1				412.9				(1,937.2		)		—
Other	.3				30.1				—				373.6				—				404.0
Total current assets	1,651.4				485.4				8.0				1,174.9				(1,937.2		)		1,382.5
PROPERTY AND EQUIPMENT, AT COST	1.8				125.4				—				15,417.2				—				15,544.4
Less accumulated depreciation	1.8				87.7				—				2,723.3				—				2,812.8
Property and equipment, net	—				37.7				—				12,693.9				—				12,731.6
DUE FROM AFFILIATES	3,150.1				430.8				150.0				2,173.6				(5,904.5		)		—
INVESTMENTS IN AFFILIATES	8,710.2				3,669.6				1,175.7				—				(13,555.5		)		—
OTHER ASSETS	8.8				139.0				—				—				(43.3		)		104.5
	$	13,520.5			$	4,762.5			$	1,333.7			$	16,042.4			$	(21,440.5	)		$	14,218.6
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	80.9			$	20.4			$	4.6			$	429.9			$	—			$	535.8
Accounts payable to affiliates	50.0				443.2				19.1				1,424.9				(1,937.2		)		—
Total current liabilities	130.9				463.6				23.7				1,854.8				(1,937.2		)		535.8
DUE TO AFFILIATES	1,424.4				1,391.3				1,403.4				1,685.4				(5,904.5		)		—
LONG-TERM DEBT	3,674.9				149.3				503.7				674.7				—				5,002.6
OTHER LIABILITIES	.1				51.9				—				381.3				(43.3		)		390.0
ENSCO SHAREHOLDERS' EQUITY (DEFICIT)	8,290.2				2,706.4				(597.1		)		11,448.4				(13,555.5		)		8,292.4
NONCONTROLLING INTERESTS	—				—				—				(2.2		)		—				(2.2		)
Total equity (deficit)	8,290.2				2,706.4				(597.1		)		11,446.2				(13,555.5		)		8,290.2
	$	13,520.5			$	4,762.5			$	1,333.7			$	16,042.4			$	(21,440.5	)		$	14,218.6

ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2017 (In millions)

	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-Guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	185.2			$	—			$	25.6			$	234.6			$	—			$	445.4
Short-term investments	440.0				—				—				—				—				$	440.0
Accounts receivable, net	6.9				.4				—				338.1				—				345.4
Accounts receivable from affiliates	351.8				492.7				—				424.3				(1,268.8		)		—
Other	—				8.8				—				372.4				—				381.2
Total current assets	983.9				501.9				25.6				1,369.4				(1,268.8		)		1,612.0
PROPERTY AND EQUIPMENT, AT COST	1.8				120.8				—				15,209.5				—				15,332.1
Less accumulated depreciation	1.8				77.1				—				2,379.5				—				2,458.4
Property and equipment, net	—				43.7				—				12,830.0				—				12,873.7
DUE FROM AFFILIATES	3,002.1				2,618.0				165.1				3,736.1				(9,521.3		)		—
INVESTMENTS IN AFFILIATES	9,098.5				3,591.9				1,106.6				—				(13,797.0		)		—
OTHER ASSETS	12.9				5.0				—				226.5				(104.2		)		140.2
	$	13,097.4			$	6,760.5			$	1,297.3			$	18,162.0			$	(24,691.3	)		$	14,625.9
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	55.4			$	39.0			$	21.7			$	642.4			$	—			$	758.5
Accounts payable to affiliates	67.3				458.3				12.4				730.8				(1,268.8		)		—
Total current liabilities	122.7				497.3				34.1				1,373.2				(1,268.8		)		758.5
DUE TO AFFILIATES	1,402.9				3,559.2				753.9				3,805.3				(9,521.3		)		—
LONG-TERM DEBT	2,841.8				149.2				1,106.0				653.7				—				4,750.7
OTHER LIABILITIES	—				3.1				—				487.8				(104.2		)		386.7
ENSCO SHAREHOLDERS' EQUITY (DEFICIT)	8,730.0				2,551.7				(596.7		)		11,844.1				(13,797.0		)		8,732.1
NONCONTROLLING INTERESTS	—				—				—				(2.1		)		—				(2.1		)
Total equity (deficit)	8,730.0				2,551.7				(596.7		)		11,842.0				(13,797.0		)		8,730.0
	$	13,097.4			$	6,760.5			$	1,297.3			$	18,162.0			$	(24,691.3	)		$	14,625.9

Condensed Consolidating Statements Of Cash Flows



ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Nine Months Ended September 30, 2018 (In millions) (Unaudited)
	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities of continuing operations	$	19.7			$	(257.2	)		$	(85.1	)		$	240.4			$	—			$	(82.2	)
INVESTING ACTIVITIES
Maturities of short-term investments	675.0				—				—				—				—				675.0
Purchases of short-term investments	(669.0		)		—				—				—				—				(669.0		)
Additions to property and equipment	—				—				—				(378.7		)		—				(378.7		)
Sale of affiliate debt	479.0				—				—				—				(479.0		)		—
Purchase of affiliate debt	(552.5		)		—				—				—				552.5				—
Other	—				—				—				10.0				—				10.0
Net cash used in investing activities of continuing operations	(67.5		)		—				—				(368.7		)		73.5				(362.7		)
FINANCING ACTIVITIES
Proceeds from issuance of senior notes	1,000.0				—				—				—				—				1,000.0
Reduction of long-term borrowings	(159.9		)		—				(537.8		)		—				(73.5		)		(771.2		)
Debt issuance costs	(17.0		)		—				—				—				—				(17.0		)
Cash dividends paid	(13.4		)		—				—				—				—				(13.4		)
Advances from (to) affiliates	(798.5		)		257.2				603.2				(61.9		)		—				—
Other	(1.9		)		—				—				(2.8		)		—				(4.7		)
Net cash provided by (used in) financing activities	9.3				257.2				65.4				(64.7		)		(73.5		)		193.7
Net cash provided by discontinued operations	—				—				—				2.5				—				2.5
Effect of exchange rate changes on cash and cash equivalents	—				—				—				(.7		)		—				(.7		)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(38.5		)		—				(19.7		)		(191.2		)		—				(249.4		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	185.2				—				25.6				234.6				—				445.4
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	146.7			$	—			$	5.9			$	43.4			$	—			$	196.0



ENSCO PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Nine Months Ended September 30, 2017 (In millions) (Unaudited)
	Ensco plc				ENSCO International Incorporated				Pride International LLC				Other Non-guarantor Subsidiaries of Ensco				Consolidating Adjustments				Total
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities of continuing operations	$	(17.3	)		$	(68.4	)		$	(84.9	)		$	390.2			$	—			$	219.6
INVESTING ACTIVITIES
Maturities of short-term investments	1,123.1				5.5				—				284.1				—				1,412.7
Purchases of short-term investments	(1,023.0		)		—				—				(17.0		)		—				(1,040.0		)
Additions to property and equipment	—				—				—				(474.1		)		—				(474.1		)
Purchase of affiliate debt	(316.3		)		—				—				—				316.3				—
Other	—				—				—				2.6				—				2.6
Net cash provided by (used in) investing activities of continuing operations	(216.2		)		5.5				—				(204.4		)		316.3				(98.8		)
FINANCING ACTIVITIES
Reduction of long-term borrowings	(220.7		)		—				—				—				(316.3		)		(537.0		)
Cash dividends paid	(9.4		)		—				—				—				—				(9.4		)
Debt issuance costs	(5.5		)		—				—				—				—				(5.5		)
Advances from affiliates	95.1				62.9				85.6				(243.6		)		—				—
Other	(2.6		)		—				—				(1.9		)		—				(4.5		)
Net cash provided by (used in) financing activities	(143.1		)		62.9				85.6				(245.5		)		(316.3		)		(556.4		)
Net cash used in discontinued operations	—				—				—				(.4		)		—				(0.4		)
Effect of exchange rate changes on cash and cash equivalents	—				—				—				.7				—				.7
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(376.6		)		—				.7				(59.4		)		—				(435.3		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	892.6				—				19.8				247.3				—				1,159.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	516.0			$	—			$	20.5			$	187.9			$	—			$	724.4

Unaudited Condensed Consolidated Financial Statements (Details) - Scenario, Forecast [Member] - Rowan Companies [Member] $ / shares in Units, shares in Millions	Oct. 22, 2018 USD ($) $ / shares shares
Description of the Business [Line Items]
Business Acquisition, Consideration Transferred \| $	$ 2,300,000,000.0
Business Acquisition, Share Price \| $ / shares	$ 8.11
Class A ordinary shares, U.S.
Description of the Business [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares \| shares	283

Unaudited Condensed Consolidated Financial Statements New Accounting Pronouncements or Changes in Accounting Principle (Details) - USD ($)	Jan. 01, 2019	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings		$ 800,000
Scenario, Forecast [Member] \| Adjustments for New Accounting Pronouncement [Member] \| Accounting Standards Update 2016-02 [Member] \| Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 55,000,000
Scenario, Forecast [Member] \| Adjustments for New Accounting Pronouncement [Member] \| Accounting Standards Update 2016-02 [Member] \| Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 75,000,000

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Capitalized Contract Cost [Line Items]
Document Period End Date			Sep. 30, 2018
Upfront Rig Mobilizations And Certain Contract Preparation [Member]
Capitalized Contract Cost [Line Items]
Capitalized Contract Cost, Net	$ 29.0		$ 29.0		$ 40.6
Capitalized Contract Cost, Amortization	10.1	$ 7.1	26.0	$ 21.8
Deferred Certification Costs
Capitalized Contract Cost [Line Items]
Capitalized Contract Cost, Net	13.0		13.0		$ 15.3
Capitalized Contract Cost, Amortization	$ 3.3	$ 3.3	$ 9.6	$ 9.1
Minimum [Member]
Capitalized Contract Cost [Line Items]
Remaining duration of drilling contracts	1 month		1 month
Maximum [Member]
Capitalized Contract Cost [Line Items]
Remaining duration of drilling contracts	4 years		4 years

Revenue from Contracts with Customers Components of Contract Assets and Contract Liabilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Document Period End Date	Sep. 30, 2018
Contract with Customer, Asset, Net, Current	$ 3.0	$ 3.0
Contract with Customer, Asset, Net, Noncurrent	0.0	2.8
Contract with Customer, Liability, Current	69.0	71.9
Contract with Customer, Liability, Noncurrent	$ 13.4	$ 51.2

Revenue from Contracts with Customers Schedule of Contract Assets and Liabilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset, Net	$ 3.0	$ 5.8
Contract with Customer, Liability	82.4	$ 123.1
Contract with Customer, Liability, Increase from Cash Receipts	32.0
Contract with Customer, Liability, Revenue Recognized, Included In Beginning Balance	(57.6)
Contract with Customer, Liability, Revenue Recognized, Added During Period	(15.1)
Contract with Customer, Asset, Reclassified to Receivable	$ (2.8)

Revenue from Contracts with Customers Future Amortization of Liabilities and Deferred Costs (Details) $ in Millions	Sep. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining duration of drilling contracts	3 months
Revenue, Remaining Performance Obligation, Amount	$ 23.3
Capitalized Contract Cost, Amortization Expense, Remainder Of Fiscal Year	$ 11.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining duration of drilling contracts	1 year
Revenue, Remaining Performance Obligation, Amount	$ 48.5
Capitalized Contract Cost, Amortization Expense, Year Two	$ 21.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining duration of drilling contracts	1 year
Revenue, Remaining Performance Obligation, Amount	$ 6.4
Capitalized Contract Cost, Amortization Expense, Year Three	6.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	4.2
Capitalized Contract Cost, Amortization Expense, Year Four And Thereafter	2.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	82.4
Capitalized Contract Cost, Net	$ 42.0

Acquisition of Atwood Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Oct. 06, 2017	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Liabilities:
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Net Assets		$ 6.5	$ (1.8)
Repayment of Atwood debt	$ (1,305.9)
Bargain purchase gain	142.0		1.8	$ 0.0
Atwood
Assets:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	445.4
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash And Cash Equivalents			0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	60.7
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable			(1.6)
Other current assets	122.7
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Current Assets			4.6
Property and equipment	1,771.2
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment			9.2
Other assets	18.6
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets			(5.1)
Liabilities:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	63.8
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable And Accrued Liabilities			(1.1)
Other liabilities	125.1
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liabilities			$ 6.4
Net assets acquired	2,229.7
Business Acquisition, Consideration Transferred	(781.8)
Previously Reported [Member]
Liabilities:
Repayment of Atwood debt	(1,305.9)
Bargain purchase gain	140.2
Previously Reported [Member] \| Atwood
Assets:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	445.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	62.3
Other current assets	118.1
Property and equipment	1,762.0
Other assets	23.7
Liabilities:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	64.9
Other liabilities	118.7
Net assets acquired	2,227.9
Business Acquisition, Consideration Transferred	$ (781.8)

Acquisition of Atwood (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	9 Months Ended	12 Months Ended
	Oct. 06, 2017	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017	May 26, 2017
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Net Assets		$ (6.5)	$ 1.8
Business Combination, Intangible Liability, Due to Unfavorable Drilling Contracts				$ 60.0
Atwood
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 445.4
Repayments of Debt	1,300.0
Business Combination, Acquired Receivables, Gross Contractual Amount	$ 64.7
Finite-lived Intangible Assets Acquired				30.1
Amortization of Intangible Assets		2.8	8.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 5.4	$ 5.4
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months				2.8
Finite-Lived Intangible Assets, Amortization Expense, Year Two				$ 2.6
Atwood \| Class A ordinary shares, U.S.
Business Acquisition [Line Items]
Share Price					$ 6.70
Shares Issued, Price Per Share	$ 5.83

Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Supplemental executive retirement plan assets	$ 30,500,000	$ 30,900,000
Derivatives, net	(8,900,000)	6,800,000
Total Financial Liabilities	(8,900,000)
Total Financial Assets	30,500,000	37,700,000
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Supplemental executive retirement plan assets	30,500,000	30,900,000
Derivatives, net	0	0
Total Financial Liabilities	0
Total Financial Assets	30,500,000	30,900,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Supplemental executive retirement plan assets	0	0
Derivatives, net	(8,900,000)	6,800,000
Total Financial Liabilities	(8,900,000)
Total Financial Assets	0	6,800,000
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Supplemental executive retirement plan assets	0	0
Derivatives, net	0	0
Total Financial Liabilities	0.0
Total Financial Assets	$ 0.0	$ 0

Fair Value Measurements (Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 5,002.6	$ 4,750.7
Estimated Fair Value	$ 4,724.8	$ 4,271.8
8.50% Senior notes due 2019(1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	8.50%	8.50%
Carrying Value	$ 0.0	$ 251.4
Estimated Fair Value	$ 0.0	$ 252.9
6.875% Senior notes due 2020(1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	6.875%	6.875%
Carrying Value	$ 128.2	$ 477.9
Estimated Fair Value	$ 128.3	$ 473.1
4.70% Senior notes due 2021(1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	4.70%	4.70%
Carrying Value	$ 112.6	$ 267.1
Estimated Fair Value	$ 110.9	$ 265.3
3.00% Exchangeable senior notes due 2024(2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	3.00%	3.00%
Carrying Value	$ 658.9	$ 635.7
Estimated Fair Value	851.6	757.1
3.00% Exchangeable senior notes due 2024(2) \| Convertible Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
3.00% exchangeable senior notes, excluding discount and net of debt issuance costs	$ 835.7	$ 834.0
4.50% Senior notes due 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	4.50%	4.50%
Carrying Value	$ 619.7	$ 619.3
Estimated Fair Value	$ 537.3	$ 527.1
8.00% Senior notes due 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	8.00%	8.00%
Carrying Value	$ 337.2	$ 337.9
Estimated Fair Value	$ 336.7	$ 333.8
5.20% Senior notes due 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	5.20%	5.20%
Carrying Value	$ 664.2	$ 663.6
Estimated Fair Value	$ 585.6	$ 571.4
7.20% Debentures due 2027
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	7.20%	7.20%
Carrying Value	$ 149.3	$ 149.3
Estimated Fair Value	$ 141.7	$ 141.9
7.875% Senior notes due 2040
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	7.875%	7.875%
Carrying Value	$ 375.5	$ 376.7
Estimated Fair Value	$ 285.1	$ 258.8
5.75% Senior notes due 2044
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	5.75%	5.75%
Carrying Value	$ 972.6	$ 971.8
Estimated Fair Value	$ 752.6	$ 690.4
7.75% Senior notes due 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument interest rate stated percentage	7.75%	7.75%
Carrying Value	$ 984.4	$ 0.0
Estimated Fair Value	$ 995.0	$ 0.0

Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Net assets associated with foreign currency derivatives	$ (8.9)		$ (8.9)		$ 6.8
Document Period End Date			Sep. 30, 2018
Maturity period of derivatives (in months)			18 months
Estimated amount of net gains (losses) associated with derivative instruments, net of tax, in next twelve months			$ (4.0)
Designated as Hedging Instrument \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	187.9		187.9
Designated as Hedging Instrument \| United Kingdom, Pounds \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	79.0		79.0
Designated as Hedging Instrument \| Australia, Dollars \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	57.5		57.5
Designated as Hedging Instrument \| Euro Member Countries, Euro \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	20.7		20.7
Designated as Hedging Instrument \| Brazil, Brazil Real \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	13.9		13.9
Designated as Hedging Instrument \| Singapore, Dollars \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	14.0		14.0
Designated as Hedging Instrument \| No currency \| Foreign Exchange Forward \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	2.8		2.8
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivatives not designated as hedging instruments	2.2	$ 2.7	9.7	$ 8.9
Not Designated as Hedging Instrument \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	153.2		153.2
Not Designated as Hedging Instrument \| United Kingdom, Pounds \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	11.6		11.6
Not Designated as Hedging Instrument \| Thailand, Baht \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	8.6		8.6
Not Designated as Hedging Instrument \| Australia, Dollars \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	18.8		18.8
Not Designated as Hedging Instrument \| Indonesia, Rupiahs \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	11.6		11.6
Not Designated as Hedging Instrument \| Euro Member Countries, Euro \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	89.4		89.4
Not Designated as Hedging Instrument \| No currency \| Foreign Exchange Forward \| Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 13.2		$ 13.2

Derivative Instruments (Schedule Of Derivatives At Fair Value) (Details) - USD ($)
$ in Millions

9 Months Ended

Sep. 30, 2018

Dec. 31, 2017

Derivative [Line Items]

Document Period End Date

Sep. 30, 2018

Total fair value of derivative assets

$ 0.4

$ 7.3

Total fair value of derivative liabilities

9.3

0.5

Designated as Hedging Instrument

Derivative [Line Items]

Total fair value of derivative assets

0.2

6.4

Total fair value of derivative liabilities

7.5

0.3

Other Current Assets | Designated as Hedging Instrument | Foreign Exchange Forward

Derivative [Line Items]

Total fair value of derivative assets

^[1]

0.2

5.9

Other Current Assets | Not Designated as Hedging Instrument | Foreign Exchange Forward

Derivative [Line Items]

Total fair value of derivative assets

^[1]

0.2

0.9

Other Current Liabilities | Designated as Hedging Instrument | Foreign Exchange Forward

Derivative [Line Items]

Total fair value of derivative liabilities

^[1]

7.0

0.2

Other Current Liabilities | Not Designated as Hedging Instrument | Foreign Exchange Forward

Derivative [Line Items]

Total fair value of derivative liabilities

^[1]

1.8

0.2

Other Noncurrent Assets | Designated as Hedging Instrument | Foreign Exchange Forward

Derivative [Line Items]

Total fair value of derivative assets

^[2]

0.0

0.5

Other Noncurrent Liabilities | Designated as Hedging Instrument | Foreign Exchange Forward

Derivative [Line Items]

Total fair value of derivative liabilities

^[2]

$ 0.5

$ 0.1

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

Derivative Instruments (Gains And Losses On Derivatives Designated As Cash Flow Hedges) (Details) - USD ($)

3 Months Ended

9 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Sep. 30, 2018

Sep. 30, 2017

Interest Rate Lock Contracts

Derivative [Line Items]

Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)

^[1]

$ 0

$ 0

$ 0

$ 0

Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)

^[1],[2]

(100,000)

(100,000)

(200,000)

(300,000)

Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)

^[1],[3]

0

0

0

0

Foreign Exchange Forward

Derivative [Line Items]

Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)

(1,900,000)

^[4]

1,700,000

^[4]

(6,800,000)

^[5]

7,700,000

^[5]

Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)

^[2]

(600,000)

^[4]

200,000

^[4]

2,400,000

^[5]

(800,000)

^[5]

Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)

^[3]

(300,000)

^[4]

300,000

^[4]

(1,500,000)

^[5]

(100,000)

^[5]

Foreign Exchange Forward | Contract Drilling

Derivative [Line Items]

Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)

(800,000)

1,800,000

(1,400,000)

Foreign Exchange Forward | Depreciation Expense

Derivative [Line Items]

Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)

200,000

200,000

600,000

600,000

Cash Flow Hedges

Derivative [Line Items]

Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)

(1,900,000)

1,700,000

(6,800,000)

7,700,000

Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)

^[2]

(700,000)

100,000

2,200,000

(1,100,000)

Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)

^[3]

$ (300,000)

$ 300,000

$ (1,500,000)

$ (100,000)

[1]	Losses on interest rate lock derivatives reclassified from AOCI into income were included in interest expense, net, in our condensed consolidated statements of operations.
[2]	Changes in the effective portion of cash flow hedge fair values 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 condensed consolidated statements of operations.
[4]	During the three-month period ended September 30, 2018, there were $800,000 of losses reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the three-month period ended September 30, 2017, there were no net amounts reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations.
[5]	During the nine-month period ended September 30, 2018, $1.8 million of gains were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the nine-month period ended September 30, 2017, $1.4 million of losses were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations.

Earnings Per Share (Reconciliation Of Net Income Attributable To Ensco Shares) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Loss from continuing operations attributable to Ensco	$ (145.0)	$ (25.2)	$ (428.0)	$ (96.2)
Income from continuing operations allocated to non-vested share awards(1)	(0.2)	(0.1)	(0.4)	(0.3)
Loss from continuing operations attributable to Ensco shares	$ (145.2)	$ (25.3)	$ (428.4)	$ (96.5)

Earnings Per Share (Narrative) (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Antidilutive share options excluded from computation of diluted earnings per share (in shares)	1.6	1.3	1.7	1.3

Debt (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
Debt (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Feb. 28, 2018	Feb. 07, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Tender Offer	$ 985.0			$ 985.0
Aggregate Principal Amount Repurchased	$ 721.8			721.8
Gain (loss) on debt extinguishment		$ (19.0)		$ (19.0)	$ (2.6)
Quarterly cash dividends (in dollars per share)	$ 0.01		$ 0.01	$ 0.03	$ 0.03
7.75% Senior notes due 2026
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	7.75%			7.75%				7.75%
8.50% senior notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	8.50%			8.50%
Aggregate Principal Amount Repurchased	$ 237.6			$ 237.6
6.875% Senior notes due 2020(1)
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	6.875%			6.875%				6.875%
Aggregate Principal Amount Repurchased	$ 328.0			$ 328.0
Long-term Debt, Maturities, Repayments of Principal in Year Two	$ 122.9			$ 122.9
4.70% Senior notes due 2021(1)
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.70%			4.70%				4.70%
Aggregate Principal Amount Repurchased	$ 156.2			$ 156.2
Long-term Debt, Maturities, Repayments of Principal in Year Three	113.5			113.5
Five Year Credit Facility \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Current borrowing capacity	2,000.0			2,000.0
Maximum borrowing capacity	1,500.0			$ 1,500.0
Commitment fee percentage				0.75%
Maximum percent of debt to total capitalization ratio		60.00%
Additional secured debt, value				$ 750.0
Additional secured debt, percent of tangible net worth				10.00%
Quarterly cash dividends (in dollars per share)				$ 0.01
Aggregate amount of available cash	150.0			$ 150.0
Fair value of amount outstanding	0.0			$ 0.0
Five Year Credit Facility \| Revolving Credit Facility [Member] \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate				3.00%
Five Year Credit Facility \| Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate				4.00%
Credit Facility due 2020 \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Current borrowing capacity	1,300.0			$ 1,300.0
Credit Facility due 2022 \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Current borrowing capacity	1,200.0			$ 1,200.0
Period for repayment of acquired companies				90 days
Aggregate amount of available cash, after repayments	250.0			$ 250.0
Senior Notes \| 7.75% Senior notes due 2026
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000.0			$ 1,000.0
Debt instrument interest rate stated percentage	7.75%			7.75%
Senior Notes \| 8.50% senior notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	8.50%			8.50%
Aggregate Principal Amount Repurchased						$ 55.0	$ 182.6
Senior Notes \| 6.875% Senior notes due 2020(1)
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	6.875%			6.875%
Aggregate Principal Amount Repurchased						$ 71.4	$ 256.6
Senior Notes \| 4.70% Senior notes due 2021(1)
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.70%			4.70%
Senior Notes \| Senior Notes \| 4.70% Senior notes due 2021(1)
Debt Instrument [Line Items]
Aggregate Principal Amount Repurchased	$ 156.2			$ 156.2

Debt Schedule of Extinguishment of Debt - Tender Offers and Repurchases (Details) - USD ($) $ in Millions	Sep. 30, 2018	Feb. 28, 2018	Feb. 07, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Aggregate Principal Amount Repurchased	$ 721.8
Aggregate Repurchase Price	$ 771.2
8.50% senior notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	8.50%
Aggregate Principal Amount Repurchased	$ 237.6
Aggregate Repurchase Price	$ 256.8
6.875% Senior notes due 2020(1)
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	6.875%			6.875%
Aggregate Principal Amount Repurchased	$ 328.0
Aggregate Repurchase Price	$ 354.7
4.70% Senior notes due 2021(1)
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.70%			4.70%
Aggregate Principal Amount Repurchased	$ 156.2
Aggregate Repurchase Price	$ 159.7
Senior Notes \| 8.50% senior notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	8.50%
Aggregate Principal Amount Repurchased		$ 55.0	$ 182.6
Senior Notes \| 6.875% Senior notes due 2020(1)
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	6.875%
Aggregate Principal Amount Repurchased		$ 71.4	$ 256.6
Senior Notes \| 4.70% Senior notes due 2021(1)
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.70%

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2018
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Discrete Income Tax Expense (Benefit)	$ 7.9	$ 19.1
Deferred Foreign Income Tax Expense (Benefit)	$ 0.4	$ 12.1

Contingencies (Narrative) (Details) $ in Millions	9 Months Ended
Contingencies (Narrative) (Details) $ in Millions	Sep. 30, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Damages Sought, Value	$ 10.0
Letters of credit outstanding, amount	$ 124.3

Segment Information (Narrative) (Details)	9 Months Ended
Segment Information (Narrative) (Details)	Sep. 30, 2018 segments contract
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Number of operating segments (in segments)	3
Number of reportable segments (in segments)	2
Number of Drilling Management Contracts \| contract	2

Segment Information (Schedule Of Segment Reporting Information) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 430,900,000	$ 460,200,000	$ 1,306,400,000	$ 1,388,800,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	327,100,000	285,800,000	996,600,000	855,200,000
Depreciation expense	120,600,000	108,200,000	356,500,000	325,300,000
General and administrative	25,100,000	30,400,000	79,100,000	86,900,000
OPERATING INCOME (LOSS)	(41,900,000)	35,800,000	(125,800,000)	121,400,000
Property and equipment, net	12,731,600,000	11,096,400,000	12,731,600,000	11,096,400,000	$ 12,873,700,000
Floaters
Segment Reporting Information [Line Items]
Revenues	241,800,000	291,900,000	785,700,000	840,700,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	175,600,000	139,100,000	564,400,000	431,100,000
Depreciation expense	77,800,000	72,700,000	233,900,000	217,500,000
General and administrative	0	0	0	0
OPERATING INCOME (LOSS)	(11,600,000)	80,100,000	(12,600,000)	192,100,000
Property and equipment, net	9,501,700,000	8,545,500,000	9,501,700,000	8,545,500,000
Jackups
Segment Reporting Information [Line Items]
Revenues	173,300,000	153,100,000	475,400,000	503,800,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	136,400,000	132,900,000	390,100,000	383,800,000
Depreciation expense	39,300,000	31,600,000	112,300,000	95,300,000
General and administrative	0	0	0	0
OPERATING INCOME (LOSS)	(2,400,000)	(11,400,000)	(27,000,000)	24,700,000
Property and equipment, net	3,190,200,000	2,502,400,000	3,190,200,000	2,502,400,000
Other
Segment Reporting Information [Line Items]
Revenues	15,800,000	15,200,000	45,300,000	44,300,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	15,100,000	13,800,000	42,100,000	40,300,000
Depreciation expense	0	0	0	0
General and administrative	0	0	0	0
OPERATING INCOME (LOSS)	700,000	1,400,000	3,200,000	4,000,000
Property and equipment, net	0	0	0	0
Operating Segments Total
Segment Reporting Information [Line Items]
Revenues	430,900,000	460,200,000	1,306,400,000	1,388,800,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	327,100,000	285,800,000	996,600,000	855,200,000
Depreciation expense	117,100,000	104,300,000	346,200,000	312,800,000
General and administrative	0	0	0	0
OPERATING INCOME (LOSS)	(13,300,000)	70,100,000	(36,400,000)	220,800,000
Property and equipment, net	12,691,900,000	11,047,900,000	12,691,900,000	11,047,900,000
Reconciling Items
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	0	0	0	0
Depreciation expense	3,500,000	3,900,000	10,300,000	12,500,000
General and administrative	25,100,000	30,400,000	79,100,000	86,900,000
OPERATING INCOME (LOSS)	(28,600,000)	(34,300,000)	(89,400,000)	(99,400,000)
Property and equipment, net	$ 39,700,000	$ 48,500,000	$ 39,700,000	$ 48,500,000

Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)	Sep. 30, 2018
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	59
Floaters
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	24
Jackups
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	35
North & South America (Excl. Brazil)
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	12
North & South America (Excl. Brazil) \| Floaters
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	8
North & South America (Excl. Brazil) \| Jackups
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	4
Europe & Mediterranean
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	17
Europe & Mediterranean \| Floaters
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	6
Europe & Mediterranean \| Jackups
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	11
Middle East & Africa
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	15
Middle East & Africa \| Floaters
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	3
Middle East & Africa \| Jackups
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	12
Asia & Pacific Rim
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	12
Asia & Pacific Rim \| Floaters
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	5
Asia & Pacific Rim \| Jackups
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	7
Construction in Progress [Member] \| Asia & Pacific Rim
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	3
Construction in Progress [Member] \| Asia & Pacific Rim \| Floaters
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	2
Construction in Progress [Member] \| Asia & Pacific Rim \| Jackups
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	1

Supplemental Financial Information (Accounts Receivable, Net) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	$ 352.4	$ 369.0
Allowance for doubtful accounts	(3.9)	(23.6)
Accounts receivable, net	348.5	345.4
Trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	334.7	335.4
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	$ 17.7	$ 33.6

Supplemental Financial Information (Other Current Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Supplemental Financial Information [Abstract]
Inventory	$ 270.7	$ 278.8
Prepaid taxes	70.2	43.5
Deferred costs	29.7	29.7
Prepaid expenses	19.5	14.2
Derivative asset	0.4	6.8
Other	13.5	8.2
Other current assets	$ 404.0	$ 381.2

Supplemental Financial Information (Other Assets, Net) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Supplemental Financial Information [Abstract]
Deferred tax assets	$ 33.1	$ 38.8
Intangible Assets, Net (Excluding Goodwill)	5.4	15.7
Deferred costs	21.1	37.4
Supplemental executive retirement plan assets	30.5	30.9
Other	14.4	17.4
Other assets, net	$ 104.5	$ 140.2

Supplemental Financial Information (Accrued Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Supplemental Financial Information [Abstract]
Accrued interest	$ 78.1	$ 83.1
Personnel costs	80.9	112.0
Deferred revenue	69.0	71.9
Taxes	46.8	46.4
Derivative liabilities	8.8	0.4
Other	26.4	12.1
Accrued liabilities and other	$ 310.0	$ 325.9

Supplemental Financial Information (Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Supplemental Financial Information [Abstract]
Unrecognized tax benefits (inclusive of interest and penalties)	$ 182.8	$ 178.0
Deferred Tax Liabilities, Net, Noncurrent	62.7	18.5
Intangible Liabilities Noncurrent	54.3	59.6
Supplemental executive retirement plan liabilities	32.1	32.0
Deferred tax liabilities	24.8	18.1
Deferred revenue	13.4	51.2
Deferred Rent Credit, Noncurrent	12.1	17.1
Other	7.8	12.2
Other liabilities	$ 390.0	$ 386.7

Supplemental Financial Information (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Supplemental Financial Information [Abstract]
Derivative instruments	$ 13.5	$ 22.5
Currency translation adjustment	7.4	7.8
Other	(1.7)	(1.7)
Accumulated other comprehensive income	$ 19.2	$ 28.6

Supplemental Financial Information Schedule of Revenue by Major Customers, by Reporting Segments (Details) - Sales Revenue, Services, Net	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Customer Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Customer Concentration Risk \| Total S.A.
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	14.00%	24.00%	14.00%	23.00%
Customer Concentration Risk \| Total S.A. [Member] [Domain]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	11.00%	10.00%	10.00%	9.00%
Customer Concentration Risk \| BP
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	5.00%	15.00%	7.00%	15.00%
Customer Concentration Risk \| Petrobras
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	5.00%	11.00%	9.00%	11.00%
Customer Concentration Risk \| Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	65.00%	40.00%	60.00%	42.00%
Floaters \| Customer Concentration Risk \| BP
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage		78.00%	33.00%	78.00%
Jackups \| Customer Concentration Risk \| BP
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	27.00%		18.00%
US Gulf Of Mexico \| Floaters \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	35.00%	21.00%	36.00%	24.00%
US Gulf Of Mexico \| Jackups \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	39.00%	35.00%	38.00%	37.00%

Supplemental Financial Information Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 430.9	$ 460.2	$ 1,306.4	$ 1,388.8
Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	430.9	460.2	1,306.4	1,388.8
ANGOLA \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	76.2	118.9	209.5	356.5
EGYPT \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0.0	53.8	31.2	160.4
BRAZIL \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	22.1	51.1	118.5	147.6
UNITED KINGDOM \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	55.4	49.1	155.7	117.0
SAUDI ARABIA \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	49.0	44.2	131.8	127.4
AUSTRALIA \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	75.1	48.7	207.7	158.6
US Gulf Of Mexico \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	59.3	34.9	172.4	112.2
Other \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	93.8	59.5	279.6	209.1
Floaters
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 241.8	$ 291.9	$ 785.7	$ 840.7
Floaters \| ANGOLA \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	82.00%	85.00%	87.00%	86.00%
Floaters \| AUSTRALIA \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	87.00%	92.00%	94.00%	83.00%
Floaters \| US Gulf Of Mexico \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	35.00%	21.00%	36.00%	24.00%
Jackups
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 173.3	$ 153.1	$ 475.4	$ 503.8
Jackups \| US Gulf Of Mexico \| Sales Revenue, Services, Net \| Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	39.00%	35.00%	38.00%	37.00%

Guarantee Of Registered Securities (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Guarantor Obligations [Line Items]
Senior notes aggregate outstanding principal balance	$ 422.9
6.875% Senior notes due 2020(1)
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	6.875%	6.875%
Senior note, maturity year	2020
7.875% Senior notes due 2040
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	7.875%	7.875%
Senior note, maturity year	2040
7.20% Debentures Due 2027
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	7.20%
Senior note, maturity year	2027
Senior notes aggregate outstanding principal balance	$ 150.0
Pride International Inc and Ensco International Inc [Member]
Guarantor Obligations [Line Items]
Subsidiary, ownership percentage by parent	100.00%

Guarantee Of Registered Securities (Condensed Consolidating Statements Of Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Guarantor Obligations [Line Items]
Revenues	$ 430.9	$ 460.2	$ 1,306.4	$ 1,388.8
Contract drilling (exclusive of depreciation)	327.1	285.8	996.6	855.2
Depreciation expense	120.6	108.2	356.5	325.3
General and administrative	25.1	30.4	79.1	86.9
OPERATING INCOME (LOSS)	(41.9)	35.8	(125.8)	121.4
OTHER INCOME (EXPENSE), NET	(77.7)	(40.4)	(233.2)	(151.3)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(119.6)	(4.6)	(359.0)	(29.9)
INCOME TAX PROVISION	23.3	23.4	66.4	66.8
DISCONTINUED OPERATIONS, NET	0.0	(0.2)	(8.1)	(0.4)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	0.0	0.0	0.0	0.0
NET LOSS	(142.9)	(28.2)	(433.5)	(97.1)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.1)	2.8	(2.6)	0.5
NET LOSS ATTRIBUTABLE TO ENSCO	(145.0)	(25.4)	(436.1)	(96.6)
Ensco plc
Guarantor Obligations [Line Items]
Revenues	12.1	13.0	36.7	38.5
Contract drilling (exclusive of depreciation)	15.2	11.3	41.6	33.7
Depreciation expense	0.0	0.0	0.0	0.0
General and administrative	10.5	10.3	31.0	33.9
OPERATING INCOME (LOSS)	(13.6)	(8.6)	(35.9)	(29.1)
OTHER INCOME (EXPENSE), NET	(0.6)	3.4	(0.1)	(10.2)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(14.2)	(5.2)	(36.0)	(39.3)
INCOME TAX PROVISION	0.0	0.0	0.0	0.0
DISCONTINUED OPERATIONS, NET	0.0	0.0	0.0	0.0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	(130.8)	(20.2)	(400.1)	(57.3)
NET LOSS	(145.0)	(25.4)	(436.1)	(96.6)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0.0	0.0	0.0	0.0
NET LOSS ATTRIBUTABLE TO ENSCO	(145.0)	(25.4)	(436.1)	(96.6)
ENSCO International Incorporated
Guarantor Obligations [Line Items]
Revenues	40.7	47.2	120.8	137.1
Contract drilling (exclusive of depreciation)	36.4	43.0	109.2	126.4
Depreciation expense	3.6	4.0	10.6	12.5
General and administrative	1.9	5.1	2.2	9.4
OPERATING INCOME (LOSS)	(1.2)	(4.9)	(1.2)	(11.2)
OTHER INCOME (EXPENSE), NET	(32.6)	(28.0)	(101.1)	(86.2)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(33.8)	(32.9)	(102.3)	(97.4)
INCOME TAX PROVISION	9.5	11.6	32.4	30.5
DISCONTINUED OPERATIONS, NET	0.0	0.0	0.0	0.0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	28.2	29.9	77.7	113.5
NET LOSS	(15.1)	(14.6)	(57.0)	(14.4)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0.0	0.0	0.0	0.0
NET LOSS ATTRIBUTABLE TO ENSCO	(15.1)	(14.6)	(57.0)	(14.4)
Pride International LLC
Guarantor Obligations [Line Items]
Revenues	0.0	0.0	0.0	0.0
Contract drilling (exclusive of depreciation)	0.0	0.0	0.0	0.0
Depreciation expense	0.0	0.0	0.0	0.0
General and administrative	0.0	0.0	0.0	0.0
OPERATING INCOME (LOSS)	0.0	0.0	0.0	0.0
OTHER INCOME (EXPENSE), NET	(19.5)	(17.4)	(69.5)	(53.0)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(19.5)	(17.4)	(69.5)	(53.0)
INCOME TAX PROVISION	0.0	0.0	0.0	0.0
DISCONTINUED OPERATIONS, NET	0.0	0.0	0.0	0.0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	23.1	23.2	69.1	69.4
NET LOSS	3.6	5.8	(0.4)	16.4
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0.0	0.0	0.0	0.0
NET LOSS ATTRIBUTABLE TO ENSCO	3.6	5.8	(0.4)	16.4
Other Non-Guarantor Subsidiaries of Ensco
Guarantor Obligations [Line Items]
Revenues	459.2	490.1	1,387.0	1,477.3
Contract drilling (exclusive of depreciation)	356.6	321.6	1,083.9	959.2
Depreciation expense	117.0	104.2	345.9	312.8
General and administrative	12.7	15.0	45.9	43.6
OPERATING INCOME (LOSS)	(27.1)	49.3	(88.7)	161.7
OTHER INCOME (EXPENSE), NET	(29.0)	(1.0)	(85.9)	(13.6)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(56.1)	48.3	(174.6)	148.1
INCOME TAX PROVISION	13.8	11.8	34.0	36.3
DISCONTINUED OPERATIONS, NET	0.0	(0.2)	(8.1)	(0.4)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	0.0	0.0	0.0	0.0
NET LOSS	(69.9)	36.3	(216.7)	111.4
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.1)	2.8	(2.6)	0.5
NET LOSS ATTRIBUTABLE TO ENSCO	(72.0)	39.1	(219.3)	111.9
Consolidating Adjustments
Guarantor Obligations [Line Items]
Revenues	(81.1)	(90.1)	(238.1)	(264.1)
Contract drilling (exclusive of depreciation)	(81.1)	(90.1)	(238.1)	(264.1)
Depreciation expense	0.0	0.0	0.0	0.0
General and administrative	0.0	0.0	0.0	0.0
OPERATING INCOME (LOSS)	0.0	0.0	0.0	0.0
OTHER INCOME (EXPENSE), NET	4.0	2.6	23.4	11.7
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	4.0	2.6	23.4	11.7
INCOME TAX PROVISION	0.0	0.0	0.0	0.0
DISCONTINUED OPERATIONS, NET	0.0	0.0	0.0	0.0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	79.5	(32.9)	253.3	(125.6)
NET LOSS	83.5	(30.3)	276.7	(113.9)
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0.0	0.0	0.0	0.0
NET LOSS ATTRIBUTABLE TO ENSCO	$ 83.5	$ (30.3)	$ 276.7	$ (113.9)

Guarantee Of Registered Securities (Condensed Consolidating Statements of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
NET LOSS	$ (142.9)	$ (28.2)	$ (433.5)	$ (97.1)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in derivative fair value	(1.9)	1.7	(6.8)	7.7
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0.7	(0.1)	(2.2)	1.1
Other	(0.1)	0.1	(0.4)	0.8
NET OTHER COMPREHENSIVE INCOME (LOSS)	(1.3)	1.7	(9.4)	9.6
COMPREHENSIVE LOSS	(144.2)	(26.5)	(442.9)	(87.5)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.1)	2.8	(2.6)	0.5
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	(146.3)	(23.7)	(445.5)	(87.0)
Ensco plc
NET LOSS	(145.0)	(25.4)	(436.1)	(96.6)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in derivative fair value	0.0	0.0	0.0	0.0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0.0	0.0	0.0	0.0
Other	0.0	0.0	0.0	0.0
NET OTHER COMPREHENSIVE INCOME (LOSS)	0.0	0.0	0.0	0.0
COMPREHENSIVE LOSS	(145.0)	(25.4)	(436.1)	(96.6)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0.0	0.0	0.0	0.0
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	(145.0)	(25.4)	(436.1)	(96.6)
ENSCO International Incorporated
NET LOSS	(15.1)	(14.6)	(57.0)	(14.4)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in derivative fair value	(1.9)	1.7	(6.8)	7.7
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0.7	(0.1)	(2.2)	1.1
Other	0.0	0.0	0.0	0.0
NET OTHER COMPREHENSIVE INCOME (LOSS)	(1.2)	1.6	(9.0)	8.8
COMPREHENSIVE LOSS	(16.3)	(13.0)	(66.0)	(5.6)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0.0	0.0	0.0	0.0
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	(16.3)	(13.0)	(66.0)	(5.6)
Pride International LLC
NET LOSS	3.6	5.8	(0.4)	16.4
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in derivative fair value	0.0	0.0	0.0	0.0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0.0	0.0	0.0	0.0
Other	0.0	0.0	0.0	0.0
NET OTHER COMPREHENSIVE INCOME (LOSS)	0.0	0.0	0.0	0.0
COMPREHENSIVE LOSS	3.6	5.8	(0.4)	16.4
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0.0	0.0	0.0	0.0
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	3.6	5.8	(0.4)	16.4
Other Non-Guarantor Subsidiaries of Ensco
NET LOSS	(69.9)	36.3	(216.7)	111.4
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in derivative fair value	0.0	0.0	0.0	0.0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0.0	0.0	0.0	0.0
Other	(0.1)	0.1	(0.4)	0.8
NET OTHER COMPREHENSIVE INCOME (LOSS)	(0.1)	0.1	(0.4)	0.8
COMPREHENSIVE LOSS	(70.0)	36.4	(217.1)	112.2
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.1)	2.8	(2.6)	0.5
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	(72.1)	39.2	(219.7)	112.7
Consolidating Adjustments
NET LOSS	83.5	(30.3)	276.7	(113.9)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in derivative fair value	0.0	0.0	0.0	0.0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0.0	0.0	0.0	0.0
Other	0.0	0.0	0.0	0.0
NET OTHER COMPREHENSIVE INCOME (LOSS)	0.0	0.0	0.0	0.0
COMPREHENSIVE LOSS	83.5	(30.3)	276.7	(113.9)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0.0	0.0	0.0	0.0
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$ 83.5	$ (30.3)	$ 276.7	$ (113.9)

Guarantee Of Registered Securities (Condensed Consolidating Balance Sheets) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Guarantor Obligations [Line Items]
Cash and cash equivalents	$ 196.0	$ 445.4	$ 724.4	$ 1,159.7
Short-term investments	434.0	440.0
Accounts receivable, net	348.5	345.4
Accounts receivable from affiliates	0.0	0.0
Other current assets	404.0	381.2
Total current assets	1,382.5	1,612.0
PROPERTY AND EQUIPMENT, AT COST	15,544.4	15,332.1
Less accumulated depreciation	2,812.8	2,458.4
Property and equipment, net	12,731.6	12,873.7	11,096.4
DUE FROM AFFILIATES	0.0	0.0
INVESTMENTS IN AFFILIATES	0.0	0.0
OTHER ASSETS	104.5	140.2
TOTAL ASSETS	14,218.6	14,625.9
Accounts payable and accrued liabilities	535.8	758.5
Accounts payable to affiliates	0.0	0.0
Total current liabilities	535.8	758.5
Due to Affiliate	0.0	0.0
LONG-TERM DEBT	5,002.6	4,750.7
OTHER LIABILITIES	390.0	386.7
ENSCO SHAREHOLDERS' EQUITY	8,292.4	8,732.1
NONCONTROLLING INTERESTS	(2.2)	(2.1)
Total equity	8,290.2	8,730.0
Total liabilities and shareholders' equity	14,218.6	14,625.9
Ensco plc
Guarantor Obligations [Line Items]
Cash and cash equivalents	146.7	185.2	516.0	892.6
Short-term investments	434.0	440.0
Accounts receivable, net	3.5	6.9
Accounts receivable from affiliates	1,066.9	351.8
Other current assets	0.3	0.0
Total current assets	1,651.4	983.9
PROPERTY AND EQUIPMENT, AT COST	1.8	1.8
Less accumulated depreciation	1.8	1.8
Property and equipment, net	0.0	0.0
DUE FROM AFFILIATES	3,150.1	3,002.1
INVESTMENTS IN AFFILIATES	8,710.2	9,098.5
OTHER ASSETS	8.8	12.9
TOTAL ASSETS	13,520.5	13,097.4
Accounts payable and accrued liabilities	80.9	55.4
Accounts payable to affiliates	50.0	67.3
Total current liabilities	130.9	122.7
Due to Affiliate	1,424.4	1,402.9
LONG-TERM DEBT	3,674.9	2,841.8
OTHER LIABILITIES	0.1	0.0
ENSCO SHAREHOLDERS' EQUITY	8,290.2	8,730.0
NONCONTROLLING INTERESTS	0.0	0.0
Total equity	8,290.2	8,730.0
Total liabilities and shareholders' equity	13,520.5	13,097.4
ENSCO International Incorporated
Guarantor Obligations [Line Items]
Cash and cash equivalents	0.0	0.0	0.0	0.0
Short-term investments	0.0	0.0
Accounts receivable, net	0.0	0.4
Accounts receivable from affiliates	455.3	492.7
Other current assets	30.1	8.8
Total current assets	485.4	501.9
PROPERTY AND EQUIPMENT, AT COST	125.4	120.8
Less accumulated depreciation	87.7	77.1
Property and equipment, net	37.7	43.7
DUE FROM AFFILIATES	430.8	2,618.0
INVESTMENTS IN AFFILIATES	3,669.6	3,591.9
OTHER ASSETS	139.0	5.0
TOTAL ASSETS	4,762.5	6,760.5
Accounts payable and accrued liabilities	20.4	39.0
Accounts payable to affiliates	443.2	458.3
Total current liabilities	463.6	497.3
Due to Affiliate	1,391.3	3,559.2
LONG-TERM DEBT	149.3	149.2
OTHER LIABILITIES	51.9	3.1
ENSCO SHAREHOLDERS' EQUITY	2,706.4	2,551.7
NONCONTROLLING INTERESTS	0.0	0.0
Total equity	2,706.4	2,551.7
Total liabilities and shareholders' equity	4,762.5	6,760.5
Pride International LLC
Guarantor Obligations [Line Items]
Cash and cash equivalents	5.9	25.6	20.5	19.8
Short-term investments	0.0	0.0
Accounts receivable, net	0.0	0.0
Accounts receivable from affiliates	2.1	0.0
Other current assets	0.0	0.0
Total current assets	8.0	25.6
PROPERTY AND EQUIPMENT, AT COST	0.0	0.0
Less accumulated depreciation	0.0	0.0
Property and equipment, net	0.0	0.0
DUE FROM AFFILIATES	150.0	165.1
INVESTMENTS IN AFFILIATES	1,175.7	1,106.6
OTHER ASSETS	0.0	0.0
TOTAL ASSETS	1,333.7	1,297.3
Accounts payable and accrued liabilities	4.6	21.7
Accounts payable to affiliates	19.1	12.4
Total current liabilities	23.7	34.1
Due to Affiliate	1,403.4	753.9
LONG-TERM DEBT	503.7	1,106.0
OTHER LIABILITIES	0.0	0.0
ENSCO SHAREHOLDERS' EQUITY	(597.1)	(596.7)
NONCONTROLLING INTERESTS	0.0	0.0
Total equity	(597.1)	(596.7)
Total liabilities and shareholders' equity	1,333.7	1,297.3
Other Non-Guarantor Subsidiaries of Ensco
Guarantor Obligations [Line Items]
Cash and cash equivalents	43.4	234.6	187.9	247.3
Short-term investments	0.0	0.0
Accounts receivable, net	345.0	338.1
Accounts receivable from affiliates	412.9	424.3
Other current assets	373.6	372.4
Total current assets	1,174.9	1,369.4
PROPERTY AND EQUIPMENT, AT COST	15,417.2	15,209.5
Less accumulated depreciation	2,723.3	2,379.5
Property and equipment, net	12,693.9	12,830.0
DUE FROM AFFILIATES	2,173.6	3,736.1
INVESTMENTS IN AFFILIATES	0.0	0.0
OTHER ASSETS	0.0	226.5
TOTAL ASSETS	16,042.4	18,162.0
Accounts payable and accrued liabilities	429.9	642.4
Accounts payable to affiliates	1,424.9	730.8
Total current liabilities	1,854.8	1,373.2
Due to Affiliate	1,685.4	3,805.3
LONG-TERM DEBT	674.7	653.7
OTHER LIABILITIES	381.3	487.8
ENSCO SHAREHOLDERS' EQUITY	11,448.4	11,844.1
NONCONTROLLING INTERESTS	(2.2)	(2.1)
Total equity	11,446.2	11,842.0
Total liabilities and shareholders' equity	16,042.4	18,162.0
Consolidating Adjustments
Guarantor Obligations [Line Items]
Cash and cash equivalents	0.0	0.0	$ 0.0	$ 0.0
Short-term investments	0.0	0.0
Accounts receivable, net	0.0	0.0
Accounts receivable from affiliates	(1,937.2)	(1,268.8)
Other current assets	0.0	0.0
Total current assets	(1,937.2)	(1,268.8)
PROPERTY AND EQUIPMENT, AT COST	0.0	0.0
Less accumulated depreciation	0.0	0.0
Property and equipment, net	0.0	0.0
DUE FROM AFFILIATES	(5,904.5)	(9,521.3)
INVESTMENTS IN AFFILIATES	(13,555.5)	(13,797.0)
OTHER ASSETS	(43.3)	(104.2)
TOTAL ASSETS	(21,440.5)	(24,691.3)
Accounts payable and accrued liabilities	0.0	0.0
Accounts payable to affiliates	(1,937.2)	(1,268.8)
Total current liabilities	(1,937.2)	(1,268.8)
Due to Affiliate	(5,904.5)	(9,521.3)
LONG-TERM DEBT	0.0	0.0
OTHER LIABILITIES	(43.3)	(104.2)
ENSCO SHAREHOLDERS' EQUITY	(13,555.5)	(13,797.0)
NONCONTROLLING INTERESTS	0.0	0.0
Total equity	(13,555.5)	(13,797.0)
Total liabilities and shareholders' equity	$ (21,440.5)	$ (24,691.3)

Guarantee Of Registered Securities (Condensed Consolidating Statements Of Cash Flows) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	$ (82.2)	$ 219.6
INVESTING ACTIVITIES
Proceeds from Issuance of Debt	1,000.0
Maturities of short-term investments	675.0	1,412.7
Purchases of short-term investments	(669.0)	(1,040.0)
Additions to property and equipment	(378.7)	(474.1)
Sale of affiliate debt	0.0	0.0
Other	10.0	2.6
Net cash used in investing activities of continuing operations	(362.7)	(98.8)
FINANCING ACTIVITIES
Reduction of long-term borrowings	(771.2)	(537.0)
Cash dividends paid	(13.4)	(9.4)
Debt issuance costs	(17.0)	(5.5)
Advances from affiliates	0.0	0.0
Other	(4.7)	(4.5)
Net cash provided by (used in) financing activities	193.7	(556.4)
Net cash provided by (used in) discontinued operations	2.5	(0.4)
Effect of exchange rate changes on cash and cash equivalents	(0.7)	0.7
DECREASE IN CASH AND CASH EQUIVALENTS	(249.4)	(435.3)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	445.4	1,159.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	196.0	724.4
Ensco plc
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	19.7	(17.3)
INVESTING ACTIVITIES
Proceeds from Issuance of Debt	1,000.0
Maturities of short-term investments	675.0	1,123.1
Purchases of short-term investments	(669.0)	(1,023.0)
Additions to property and equipment	0.0	0.0
Sale of Affiliate Debt	479.0
Sale of affiliate debt	(552.5)	(316.3)
Other	0.0	0.0
Net cash used in investing activities of continuing operations	(67.5)	(216.2)
FINANCING ACTIVITIES
Reduction of long-term borrowings	(159.9)	(220.7)
Cash dividends paid	(13.4)	(9.4)
Debt issuance costs	(17.0)	(5.5)
Advances from affiliates		95.1
Advances from (to) affiliate	(798.5)
Other	(1.9)	(2.6)
Net cash provided by (used in) financing activities	9.3	(143.1)
Net cash provided by (used in) discontinued operations	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
DECREASE IN CASH AND CASH EQUIVALENTS	(38.5)	(376.6)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	185.2	892.6
CASH AND CASH EQUIVALENTS, END OF PERIOD	146.7	516.0
ENSCO International Incorporated
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(257.2)	(68.4)
INVESTING ACTIVITIES
Proceeds from Issuance of Debt	0.0
Maturities of short-term investments	0.0	5.5
Purchases of short-term investments	0.0	0.0
Additions to property and equipment	0.0	0.0
Sale of Affiliate Debt	0.0
Sale of affiliate debt	0.0
Other	0.0	0.0
Net cash used in investing activities of continuing operations	0.0	5.5
FINANCING ACTIVITIES
Reduction of long-term borrowings	0.0	0.0
Cash dividends paid	0.0	0.0
Debt issuance costs	0.0	0.0
Advances from affiliates	257.2	62.9
Other	0.0	0.0
Net cash provided by (used in) financing activities	257.2	62.9
Net cash provided by (used in) discontinued operations	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
DECREASE IN CASH AND CASH EQUIVALENTS	0.0	0.0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0.0	0.0
CASH AND CASH EQUIVALENTS, END OF PERIOD	0.0	0.0
Pride International LLC
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(85.1)	(84.9)
INVESTING ACTIVITIES
Proceeds from Issuance of Debt	0.0
Maturities of short-term investments	0.0	0.0
Purchases of short-term investments	0.0	0.0
Additions to property and equipment	0.0	0.0
Sale of Affiliate Debt	0.0
Sale of affiliate debt	0.0
Other	0.0	0.0
Net cash used in investing activities of continuing operations	0.0	0.0
FINANCING ACTIVITIES
Reduction of long-term borrowings	(537.8)	0.0
Cash dividends paid	0.0	0.0
Debt issuance costs	0.0	0.0
Advances from affiliates	603.2	85.6
Other	0.0	0.0
Net cash provided by (used in) financing activities	65.4	85.6
Net cash provided by (used in) discontinued operations	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
DECREASE IN CASH AND CASH EQUIVALENTS	(19.7)	0.7
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	25.6	19.8
CASH AND CASH EQUIVALENTS, END OF PERIOD	5.9	20.5
Other Non-Guarantor Subsidiaries of Ensco
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	240.4	390.2
INVESTING ACTIVITIES
Proceeds from Issuance of Debt	0.0
Maturities of short-term investments	0.0	284.1
Purchases of short-term investments	0.0	(17.0)
Additions to property and equipment	(378.7)	(474.1)
Sale of Affiliate Debt	0.0
Sale of affiliate debt	0.0
Other	10.0	2.6
Net cash used in investing activities of continuing operations	(368.7)	(204.4)
FINANCING ACTIVITIES
Reduction of long-term borrowings	0.0
Proceeds from (Repayments of) Debt		0.0
Cash dividends paid	0.0	0.0
Debt issuance costs	0.0	0.0
Advances from (to) affiliate	(61.9)	(243.6)
Other	(2.8)	(1.9)
Net cash provided by (used in) financing activities	(64.7)	(245.5)
Net cash provided by (used in) discontinued operations	2.5	(0.4)
Effect of exchange rate changes on cash and cash equivalents	(0.7)	0.7
DECREASE IN CASH AND CASH EQUIVALENTS	(191.2)	(59.4)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	234.6	247.3
CASH AND CASH EQUIVALENTS, END OF PERIOD	43.4	187.9
Consolidating Adjustments
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	0.0	0.0
INVESTING ACTIVITIES
Proceeds from Issuance of Debt	0.0
Maturities of short-term investments	0.0	0.0
Purchases of short-term investments	0.0	0.0
Additions to property and equipment	0.0	0.0
Sale of Affiliate Debt	(479.0)
Sale of affiliate debt	552.5	316.3
Other	0.0	0.0
Net cash used in investing activities of continuing operations	73.5	316.3
FINANCING ACTIVITIES
Reduction of long-term borrowings	(73.5)	(316.3)
Cash dividends paid	0.0	0.0
Debt issuance costs	0.0	0.0
Advances from affiliates	0.0	0.0
Other	0.0	0.0
Net cash provided by (used in) financing activities	(73.5)	(316.3)
Net cash provided by (used in) discontinued operations	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
DECREASE IN CASH AND CASH EQUIVALENTS	0.0	0.0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0.0	0.0
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 0.0	$ 0.0