Valaris Limited (VAL) 10-Q 2 May 19 2019 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 26, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Registrant Name	Ensco Rowan plc
Entity Central Index Key	0000314808
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Shares, Shares Outstanding		197,536,254
Entity Small Business	false
Entity Emerging Growth Company	false

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues	$ 405.9	$ 417
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	332.6	325.2
Cost, Depreciation	125	115.2
General and administrative	29.6	27.9
Total operating expenses	487.2	468.3
OPERATING LOSS	(81.3)	(51.3)
OTHER INCOME (EXPENSE)
Interest income	3.5	3
Interest expense, net	(81)	(65.6)
Other, net	2.3	(8.1)
Other income (expense), net	(75.2)	(70.7)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(156.5)	(122)
PROVISION FOR INCOME TAXES
Current income tax expense	25.6	7.1
Deferred income tax expense	5.9	11.3
Total provision for income taxes	31.5	18.4
LOSS FROM CONTINUING OPERATIONS	(188)	(140.4)
LOSS FROM DISCONTINUED OPERATIONS, NET	0	(0.1)
NET LOSS	(188)	(140.5)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.4)	0.4
NET LOSS ATTRIBUTABLE TO ENSCOROWAN	$ (190.4)	$ (140.1)
EARNINGS (LOSS) PER SHARE - BASIC AND DILUTED
Income (Loss) from Continuing Operations, Per Basic and Diluted Share	$ (1.75)	$ (1.29)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share	0	0
Loss Per Share, Basic and Diluted	$ (1.75)	$ (1.29)
WEIGHTED-AVERAGE SHARES OUTSTANDING
Weighted Average Number of Shares Outstanding, Basic and Diluted	108.7	108.4

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
NET LOSS	$ (188)	$ (140.5)
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	0	1.9
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	1.6	(2.2)
Other	(0.1)	(0.1)
NET OTHER COMPREHENSIVE INCOME	1.5	(0.4)
COMPREHENSIVE LOSS	(186.5)	(140.9)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.4)	0.4
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$ (188.9)	$ (140.5)

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 298.4	$ 275.1
Short-term Investments	245	329
Accounts receivable, net	313.7	344.7
Other	354.8	360.9
Total current assets	1,211.9	1,309.7
PROPERTY AND EQUIPMENT, AT COST	15,368.6	15,517
Less accumulated depreciation	2,859.7	2,900.8
Property and equipment, net	12,508.9	12,616.2
OTHER ASSETS, NET	142.2	97.8
TOTAL ASSETS	13,863	14,023.7
CURRENT LIABILITIES
Accounts payable - trade	214.2	210.5
Accrued liabilities and other	302.7	318
Total current liabilities	516.9	528.5
LONG-TERM DEBT	5,018.5	5,010.4
OTHER LIABILITIES	427.3	396
COMMITMENTS AND CONTINGENCIES
ENSCO SHAREHOLDERS' EQUITY
Additional paid-in capital	7,230.2	7,225
Retained earnings	679.3	874.2
Accumulated other comprehensive income	19.7	18.2
Treasury shares, at cost	(74.9)	(72.2)
Total Ensco shareholders' equity	7,900.5	8,091.4
NONCONTROLLING INTERESTS	(0.2)	(2.6)
Total equity	7,900.3	8,088.8
Total liabilities and shareholders' equity	13,863	14,023.7
Class A ordinary shares, U.S. [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	46.1	46.1
Common Class B, Par Value In GBP [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	$ 0.1	$ 0.1

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical)	Mar. 31, 2019£ / sharesshares	Mar. 31, 2019$ / sharesshares	Dec. 31, 2018£ / sharesshares	Dec. 31, 2018$ / sharesshares
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.10
Treasury shares, shares held (in shares)	5,900,000	5,900,000	5,900,000	5,900,000
Class A ordinary shares, U.S. [Member]
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.4		$ 0.4
Common shares, shares issued (in shares)	115,200,000	115,200,000	115,200,000	115,200,000
Common Class B, Par Value In GBP [Member]
Common Stock, Par or Stated Value Per Share | £ / shares	£ 1		£ 1
Common shares, shares authorized (in shares)	50,000	50,000	50,000	50,000
Common shares, shares issued (in shares)	50,000	50,000	50,000	50,000

Condensed Consolidated Statem_3

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
NET LOSS	$ (188)	$ (140.5)
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Cost, Depreciation	125	115.2
Amortization, net	(14.5)	(16.8)
Share-based compensation expense	7.8	8.4
Deferred income tax expense	5.9	11.3
Loss on debt extinguishment	0	18.8
Gain on bargain purchase	0	(16.6)
Other	1.4	(2.1)
Changes in operating assets and liabilities	38	61.8
Net cash provided by operating activities of continuing operations	(24.4)	39.5
INVESTING ACTIVITIES
Maturities of short-term investments	204	390
Purchases of short-term investments	(120)	(349)
Additions to property and equipment	(29)	(269.3)
Other	0.3	0.1
Net cash provided by (used in) investing activities	55.3	(228.2)
FINANCING ACTIVITIES
Cash dividends paid	(4.5)	(4.5)
Proceeds from Issuance of senior notes	0	1,000
Reduction of long-term borrowings	0	(771)
Debt financing costs	0	(16.8)
Other	(2.8)	(1.2)
Net cash (used in) provided by financing activities	(7.3)	206.5
DISCONTINUED OPERATIONS
Net cash provided by discontinued operations	0	2.5
Effect of exchange rate changes on cash and cash equivalents	(0.3)	(0.3)
INCREASE IN CASH AND CASH EQUIVALENTS	23.3	20
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	275.1	445.4
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 298.4	$ 465.4

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Financial Statements	3 Months Ended
	Mar. 31, 2019
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 Rowan plc and subsidiaries (the "Company," "EnscoRowan," "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, 2018 condensed consolidated balance sheet data was derived from our 2018 audited consolidated financial statements, but does 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 quarter s ended March 31, 2019 and 2018 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 quarter ended March 31, 2019 are not necessarily indicative of the results of operations that will be realized for the year ending December 31, 2019 . 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, 2018 , filed with the SEC on February 28, 2019 . On April 11, 2019, we completed our combination with Rowan Companies plc and effected a four-to-one share consolidation (being a reverse stock under English law). See "Note 3 - Rowan Transaction" and "Note 14 - Subsequent Events" for additional information. New Accounting Pronouncements Recently adopted accounting standards 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 makes more hedging strategies eligible for hedge accounting, amends presentation and disclosure requirements and changes how companies assess effectiveness, including the elimination of separate measurement and recognition of ineffectiveness on designated hedging instruments. This update is effective for annual and interim periods beginning after December 15, 2018, with early adoption permitted. We adopted Updated 2017-12 effective January 1, 2019. As a result, beginning on the effective date, we will no longer separately measure and recognize ineffectiveness on our designated cash flow hedges. Update 2017-02 requires a modified retrospective adoption approach whereby amounts previously recorded to earnings for hedge ineffectiveness on hedging relationships that exist as of the adoption date are recorded as a cumulative effect adjustment to opening retained earnings. As of our adoption date, we had no amounts previously recorded for ineffectiveness for hedging relationships that existed as of our adoption date and therefore no cumulative effect adjustment to retained earnings was recorded. 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), Targeted 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 (the "effective date method") and (2) provides lessors with a practical expedient, by class of underlying asset, to not separate lease and non-lease components and account for the combined component under Topic 606 when the non-lease component is the predominant element of the combined component. The lessor practical expedient is limited to circumstances in which the lease, if accounted for separately, would be classified as an operating lease under Topic 842. We adopted ASU 2016-02, effective January 1, 2019, using the effective date method. With respect to our drilling contracts, which contain a lease component, we elected to apply the practical expedient to not separate the lease and non-lease components and account for the combined component under Topic 606. With respect to all of our drilling contracts that existed on the adoption date, we concluded that the criteria to elect the lessor practical expedient had been met. As a result, we will continue to recognize the revenue associated with our drilling contracts under Topic 606. Therefore, we do not expect any change in our revenue recognition patterns or disclosures as a result of our adoption of Topic 842. With respect to leases whereby we are the lessee, we elected several practical expedients afforded under Topic 842. We elected the package of practical expedients permitted under the transition guidance of Topic 842, including the hindsight practical expedient which permits entities to use hindsight in determining the lease term and assessing impairment. We also elected the practical expedient to not separate lease components from non-lease components for all asset classes, with the exception of office space. Furthermore, we also elected the practical expedient that permits entities not to apply the recognition requirements for leases with a term of 12 months or less. Upon adoption of ASU 2016-02 on January 1, 2019, we recognized lease liabilities and right-of-use assets of $64.6 million and $53.7 million , respectively. See "Note 10 - Leases" for additional information.

Revenue Recognition (Notes)

Revenue Recognition (Notes)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	Revenue from Contracts with Customers Our drilling contracts with customers provide a drilling rig and 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 March 31, 2019 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 or other time increment basis. Day rate consideration is allocated to the distinct hourly or other time 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 billed to our customers on a monthly basis and payment terms on customer invoices typically range 30 - 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 or other 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 revenues whereby 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 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 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. 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. The following table summarizes our trade receivables, contract assets and contract liabilities (in millions): March 31, 2019 December 31, 2018 Current contract assets $ 3.1 $ 4.0 Current contract liabilities (deferred revenue) $ 55.9 $ 56.9 Noncurrent contract liabilities (deferred revenue) $ 17.8 $ 20.5 Significant changes in contract assets and liabilities during the three-month period ended March 31, 2019 are as follows (in millions): Contract Assets Contract Liabilities Balance as of December 31, 2018 $ 4.0 $ 77.4 Revenue recognized in advance of right to bill customer .1 — Increase due to cash received — 22.3 Decrease due to amortization of deferred revenue that was included in the beginning contract liability balance — (24.6 ) Decrease due to amortization of deferred revenue that was added during the period — (1.4 ) Decrease due to transfer to receivables during the period (1.0 ) — Balance as of March 31, 2019 $ 3.1 $ 73.7 Deferred Contract Costs Costs incurred for upfront rig mobilizations and certain contract preparation 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 $26.6 million and $23.5 million as of March 31, 2019 and December 31, 2018 , respectively. During the three months ended March 31, 2019 and 2018 , amortization of such costs totaled $6.4 million and $6.8 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 $13.4 million and $13.6 million as of March 31, 2019 and December 31, 2018 , respectively. During the three months ended March 31, 2019 and 2018 , amortization of such costs totaled $2.8 million and $3.1 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 March 31, 2019 is set forth in the table below (in millions): Remaining 2019 2020 2021 2022 and Thereafter Total Amortization of contract liabilities $ 52.4 $ 11.8 $ 7.7 $ 1.8 $ 73.7 Amortization of deferred costs $ 25.4 $ 10.4 $ 2.7 $ 1.5 $ 40.0

Rowan Transaction Rowan Transac

Rowan Transaction Rowan Transaction (Notes)	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	Rowan Transaction On October 7, 2018 , we entered into a transaction agreement ("the Transaction Agreement") with Rowan Companies plc ("Rowan"). On April 11, 2019 (the "Transaction Date"), we completed our combination with Rowan pursuant to the Transaction Agreement (the "Rowan Transaction"). On the Transaction Date, we changed our name to Ensco Rowan plc. Rowan's financial results will be included in our consolidated results beginning on the Transaction Date. Prior to the Rowan Transaction, Rowan and Saudi Aramco formed a 50/50 joint venture to own, manage and operate drilling rigs offshore Saudi Arabia ("Saudi Aramco Rowan Offshore Drilling Company" or "ARO"). ARO currently owns a fleet of seven jackup rigs, leases another nine jackup rigs from us and has plans to order up to 20 newbuild jackup rigs over the next 10 years. The Rowan Transaction is expected to enhance the market leadership of the combined company with a fleet of high-specification floaters and jackups and position us well to meet increasing and evolving customer demand. The increased scale, diversification and financial strength of the combined company will provide us advantages to better serve our customers. Exclusive of two older jackup rigs marked for retirement, Rowan’s offshore rig fleet consists of four ultra-deepwater drillships and 19 jackup rigs. Consideration As a result of the Rowan Transaction, Rowan shareholders received 2.750 Ensco Class A Ordinary shares for each Rowan Class A ordinary share, representing a value of $43.67 per Rowan share based on a closing price of $15.88 per Ensco share on April 10, 2019 , the last trading day before the Transaction Date. Total consideration delivered in the Rowan Transaction consisted of 88.3 million Ensco shares with an aggregate value of $1.4 billion , inclusive of $2.6 million for the estimated fair value of replacement employee equity awards. All share and per share data included in this report have been retroactively adjusted to reflect the reverse stock split discussed in "Note 14 - Subsequent Events". Assets Acquired and Liabilities Assumed Under U.S. GAAP, Ensco plc is considered to be the acquirer for accounting purposes. As a result, Rowan's assets acquired and liabilities assumed in the Rowan Transaction will be recorded at their estimated fair values as of the Transaction 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. We have not finalized the fair values of assets acquired and liabilities assumed; therefore, the fair value estimates set forth below are subject to adjustment during a one year measurement period subsequent to the Transaction Date. The estimated fair values of certain assets and liabilities including materials and supplies, long-lived assets and contingencies require judgments and assumptions that increase the likelihood that adjustments may be made to these estimates during the measurement period, and those adjustments could be material. The provisional amounts for assets acquired and liabilities assumed are based on preliminary estimates of their fair values as of the Transaction Date and are as follows (in millions): Estimated Fair Value Assets: Cash and cash equivalents $ 928.9 Accounts receivable (1) 199.1 Other current assets 200.0 Long-term notes receivable from ARO 454.5 Investment in ARO 152.3 Property and equipment 2,755.3 Other assets 184.4 Liabilities: Accounts payable and accrued liabilities 252.1 Current portion of long-term debt 181.2 Long-term debt 1,910.9 Other liabilities 372.0 Net assets acquired 2,158.3 Less: Transaction consideration (1,404.6 ) Bargain purchase gain $ 753.7 (1) Gross contractual amounts receivable totaled $201.1 million as of the Transaction Date. Bargain Purchase Gain The estimated fair values assigned to assets acquired net of liabilities assumed exceeded the consideration transferred, resulting in a bargain purchase gain primarily driven by the decline in our share price from $33.92 to $15.88 between the last trading day prior to the announcement of the Rowan Transaction and the Transaction Date. The estimated gain will be reflected in other, net, in our condensed consolidated statement of operations during the second quarter. Transaction-Related Costs Transaction-related costs were expensed as incurred and consisted of various advisory, legal, accounting, valuation and other professional or consulting fees totaling $5.9 million during the three-month period ended March 31, 2019 . These costs were included in general and administrative expense in our condensed consolidated statements of operations. Upon closing of the Rowan Transaction, we incurred additional transaction-related costs of $14.2 million . Pro Forma Impact of the Rowan Transaction The following unaudited supplemental pro forma results present consolidated information as if the Rowan Transaction was completed on January 1, 2018. The pro forma results include, among others, (i) the amortization associated with acquired intangible assets and liabilities (ii) a reduction in depreciation expense for adjustments to property and equipment (iii) the amortization of premiums and discounts recorded on Rowan's debt (iv) removal of the historical amortization of unrealized gains and losses related to Rowan's pension plans and (v) the amortization of basis differences in assets and liabilities of ARO. The pro forma results do not include any potential synergies or non-recurring charges that may result directly from the Rowan Transaction. (in millions, except per share amounts) Three Months Ended March 31, 2019 (1) 2018 Revenues $ 580.4 $ 628.2 Net loss $ (271.6 ) $ (191.4 ) Earnings per share - basic and diluted $ (1.38 ) $ (0.97 ) (1) Pro forma net income and earnings per share were adjusted to exclude an aggregate $9.4 million of transaction-related and integration costs incurred during the three-month period ended March 31, 2019 .

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following fair value hierarchy table categorizes information regarding our net financial assets measured at fair value on a recurring basis (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 March 31, 2019 Supplemental executive retirement plan assets $ 29.3 $ — $ — $ 29.3 Total financial assets $ 29.3 $ — $ — $ 29.3 Derivatives, net $ — $ (6.9 ) $ — $ (6.9 ) Total financial liabilities $ — $ (6.9 ) $ — $ (6.9 ) As of December 31, 2018 Supplemental executive retirement plan assets $ 27.2 $ — $ — $ 27.2 Total financial assets $ 27.2 $ — $ — $ 27.2 Derivatives, net $ — $ (10.7 ) $ — $ (10.7 ) Total financial liabilities $ — $ (10.7 ) $ — $ (10.7 ) 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 were 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 debt instruments were as follows (in millions): March 31, December 31, Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value 6.875% senior notes due 2020 $ 126.9 $ 122.8 $ 127.5 $ 121.6 4.70% senior notes due 2021 112.9 108.5 112.7 101.8 3.00% exchangeable senior notes due 2024 (1) 674.7 655.5 666.8 575.5 4.50% senior notes due 2024 620.0 476.0 619.8 405.2 8.00% senior notes due 2024 336.7 305.1 337.0 273.7 5.20% senior notes due 2025 664.6 517.7 664.4 443.9 7.75% senior notes due 2026 985.6 849.8 985.0 725.5 7.20% debentures due 2027 149.4 121.1 149.3 109.1 7.875% senior notes due 2040 374.6 238.2 375.0 223.2 5.75% senior notes due 2044 973.1 648.2 972.9 566.3 Total $ 5,018.5 $ 4,042.9 $ 5,010.4 $ 3,545.8 (1) 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 $836.9 million as of March 31, 2019 . 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 March 31, 2019 and December 31, 2018 . 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 estimated fair values of our senior notes and debentures were determined using quoted market prices.

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
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 various market risks, primarily foreign currency exchange rate risk. All of our 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 the fair value of derivatives depends on the use of the derivative and whether it qualifies for hedge accounting. Net liabilities of $6.9 million and $10.7 million associated with our derivatives were included on our condensed consolidated balance sheets as of March 31, 2019 and December 31, 2018 , respectively. All of our derivatives 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 March 31, December 31, March 31, December 31, Derivatives Designated as Hedging Instruments Foreign currency forward contracts - current (1) $ .2 $ .2 $ 5.1 $ 8.3 Foreign currency forward contracts - non-current (2) .1 — .2 .4 .3 .2 5.3 8.7 Derivatives Not Designated as Hedging Instruments Foreign currency forward contracts - current (1) .2 .4 2.1 2.6 Total $ .5 $ .6 $ 7.4 $ 11.3 (1) Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets. (2) Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets 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 March 31, 2019 , we had cash flow hedges outstanding to exchange an aggregate $169.6 million for various foreign currencies, including $88.3 million for British pounds, $39.8 million for Australian dollars, $21.5 million for euros, $12.9 million for Brazilian reals and $7.1 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 loss for the quarter s ended March 31, 2019 and 2018 were as follows (in millions): Gain Recognized in Other Comprehensive Income ("OCI") (Effective Portion) (Gain) Loss Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion) (1) Loss Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing) (2) 2019 2018 2019 2018 2019 2018 Interest rate lock contracts (3) $ — $ — $ .1 $ .1 $ — $ — Foreign currency forward contracts (4) — 1.9 1.5 (2.3 ) — (.2 ) Total $ — $ 1.9 $ 1.6 $ (2.2 ) $ — $ (.2 ) (1) Changes in the fair value of cash flow hedges are recorded in AOCI. Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction. (2) Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our condensed consolidated statements of operations. As a result of our adoption of Update 2017-12, which we adopted effective January 1, 2019, ineffectiveness is no longer separately measured and recognized. See additional information in "Note 1 - Unaudited Condensed Consolidated Financial Statements". (3) Losses on interest rate lock derivatives reclassified from AOCI into income (effective portion) were included in interest expense, net, in our condensed consolidated statements of operations. (4) During the first quarter of 2019 , $1.7 million of losses were reclassified from AOCI into contract drilling expense and $0.2 million of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the prior year quarter, $2.1 million of gains were reclassified from AOCI into contract drilling expense and $0.2 million 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 March 31, 2019 , we held derivatives not designated as hedging instruments to exchange an aggregate $191.8 million for various foreign currencies, including $84.3 million for euros, $31.7 million for Australian dollars, $18.5 million for Qatari riyals, $13.2 million for British pounds, $10.1 million for Indonesian rupiahs and $34.0 million for other currencies. Net losses of $3.1 million and net gains of $1.8 million associated with our derivatives not designated as hedging instruments were included in other, net, in our condensed consolidated statements of operations for the quarter s ended March 31, 2019 and 2018 , respectively. As of March 31, 2019 , 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 $3.0 million .

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share We compute basic and diluted earnings per share ("EPS") in accordance with the two-class method. Net income attributable to EnscoRowan 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 period ended March 31, 2019 , all income attributable to noncontrolling interest was from continuing operations. The following table is a reconciliation of income from continuing operations attributable to EnscoRowan shares used in our basic and diluted EPS computations for the quarter s ended March 31, 2019 and 2018 (in millions): 2019 2018 Loss from continuing operations attributable to EnscoRowan $ (190.4 ) $ (140.0 ) Income from continuing operations allocated to non-vested share awards (.1 ) (.1 ) Loss from continuing operations attributable to EnscoRowan shares $ (190.5 ) $ (140.1 ) Anti-dilutive share awards totaling 200,000 and 400,000 were excluded from the computation of diluted EPS for the quarter s ended March 31, 2019 and 2018 , respectively. 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 quarter s ended March 31, 2019 or 2018 .

Shareholders' Equity Shareholde

Shareholders' Equity Shareholders' Equity	3 Months Ended
	Mar. 31, 2019
Shareholders' Equity [Abstract]
Shareholders' Equity and Share-based Payments [Text Block]	Shareholders' Equity Activity in our various shareholders' equity accounts for the three-month periods ended March 31, 2019 and 2018 were as follows (in millions): Shares Par Value Additional Paid-in Capital Retained Earnings AOCI Treasury Shares Non-controlling Interest BALANCE, December 31, 2018 115.2 $ 46.2 $ 7,225.0 $ 874.2 $ 18.2 $ (72.2 ) $ (2.6 ) Net loss — — — (190.4 ) — — 2.4 Dividends paid ($0.04 per share) — — — (4.5 ) — — — Shares issued under share-based compensation plans, net — — (.1 ) — — .1 — Repurchase of shares — — — — — (2.8 ) — Share-based compensation cost — — 5.3 — — — — Net other comprehensive income — — — — 1.5 — — BALANCE, March 31, 2019 115.2 $ 46.2 $ 7,230.2 $ 679.3 $ 19.7 $ (74.9 ) $ (0.2 ) Shares Par Value Additional Retained AOCI Treasury Non-controlling BALANCE, December 31, 2017 111.8 $ 44.8 $ 7,195.0 $ 1,532.7 $ 28.6 $ (69.0 ) $ (2.1 ) Net loss — — — (140.1 ) — — (.4 ) Dividends paid ($0.04 per share) — — — (4.4 ) — — — Cumulative-effect due to ASU 2018-02 — — — (.8 ) .8 — — Shares issued under share-based compensation plans, net — — (.1 ) — — .1 — Repurchase of shares — — — — — (1.1 ) — Share-based compensation cost — — 7.5 — — — — Net other comprehensive loss — — — — (.4 ) — — BALANCE, March 31, 2018 111.8 $ 44.8 $ 7,202.4 $ 1,387.4 $ 29.0 $ (70.0 ) $ (2.5 ) In connection with the Rowan Transaction, on April 11, 2019, we issued 88.3 million Class A Ordinary shares with an aggregate value of $1.4 billion . See "Note 3 - Rowan Transaction" for additional information. Additionally, on April 11, 2019, we effected a four-for-one reverse stock split. See "Note 14 - Subsequent Events" for additional information.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income Taxes	Income Taxes Ensco Rowan plc, our parent company, is domiciled and resident in the U.K. Our subsidiaries conduct operations and earn income in numerous countries and are subject to the laws of taxing jurisdictions within those countries. The income of our non-U.K. subsidiaries is generally not subject to U.K. taxation. Income tax rates imposed in the tax jurisdictions in which our subsidiaries conduct operations vary, as does the tax base to which the rates are applied. In some cases, tax rates may be applicable to gross revenues, statutory or negotiated deemed profits or other bases utilized under local tax laws, rather than to net income. Therefore, we generally incur income tax expense in periods in which we operate at a loss. Our drilling rigs frequently move from one taxing jurisdiction to another to perform contract drilling services. In some instances, the movement of our drilling rigs among taxing jurisdictions will involve the transfer of ownership of the drilling rigs among our subsidiaries. As a result of frequent changes in the taxing jurisdictions in which our drilling rigs are operated and/or owned, changes in the overall level of our income and changes in tax laws, our consolidated effective income tax rate may vary substantially from one reporting period to another. Income tax rates and taxation systems in the jurisdictions in which our subsidiaries conduct operations vary and our subsidiaries are frequently subjected to minimum taxation regimes. In some jurisdictions, tax liabilities are based on gross revenues, statutory or negotiated deemed profits or other factors, rather than on net income and our subsidiaries are frequently unable to realize tax benefits when they operate at a loss. Accordingly, during periods of declining profitability, our consolidated income tax expense generally does not decline proportionally with consolidated income, which results in higher effective income tax rates. Furthermore, we generally continue to incur income tax expense in periods in which we operate at a loss on a consolidated basis. Historically, we 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 quarter ended March 31, 2019 . We used a discrete effective tax rate method to calculate income taxes for the quarters ended March 31, 2019 and 2018. 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 expense for the quarter ended March 31, 2019 was $0.6 million and was attributable to unrecognized tax benefits associated with tax positions taken in prior years. Discrete income tax benefit for the quarter ended March 31, 2018 was $8.9 million and was primarily attributable to U.S. tax reform and a restructuring transaction, partially offset by discrete tax expense related to the repurchase and redemption of senior notes and unrecognized tax benefits associated with tax positions taken in prior years.

Contingencies

Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies DSA Dispute On January 4, 2016, Petrobras sent a notice to us declaring the drilling services agreement with Petrobras (the "DSA") for ENSCO DS-5, a drillship ordered from Samsung Heavy Industries, a shipyard in South Korea ("SHI"), 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 2018 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 the losses incurred in connection with the foregoing Petrobras arbitration and certain other losses relating to the DSA. 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. In August 2018, the tribunal awarded us approximately $2.8 million in costs and legal fees incurred to date, plus interest, which was collected during the fourth quarter of 2018. The January 2018 arbitration award provides that SHI is liable to us for $10.0 million or damages that we can prove. We submitted our claim for damages to the tribunal, and the arbitral hearing on damages owed to us by SHI took place in the first quarter of 2019. We are awaiting the result of the tribunal’s decision, and 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 March 31, 2019 totaled $128.0 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 March 31, 2019 , we had not been required to make collateral deposits with respect to these agreements.

Leases (Notes)

Leases (Notes)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	Leases We have operating leases for office space, facilities, equipment, employee housing and certain rig berthing facilities. For all asset classes, except office space, we account for the lease component and the non-lease component as a single lease component. Our leases have remaining lease terms of less than one year to 11 years, some of which include options to extend. Additionally, we sublease certain office space to third parties. The components of lease expense are as follows (in millions): Three Months Ended March 31, 2019 Long-term operating lease cost $ 6.2 Short-term operating lease cost 3.1 Sublease income (.4 ) Total operating lease cost $ 8.9 Supplemental balance sheet information related to our operating leases is as follows (in millions, except lease term and discount rate): March 31, 2019 Operating lease right-of-use assets $ 47.9 Current lease liability $ 17.9 Long-term lease liability 41.1 Total operating lease liabilities $ 59.0 Weighted-average remaining lease term (in years) 5.2 Weighted-average discount rate (1) 8.71 % (1) Represents our estimated incremental borrowing cost on a secured basis for similar terms as the underlying lease. For the quarter ended March 31, 2019 , cash paid for amounts included in the measurement of our operating lease liabilities was $7.0 million . Right-of-use assets and lease liabilities recorded for leases commencing during the quarter ended March 31, 2019 were insignificant. Maturities of lease liabilities as of March 31, 2019 were as follows (in millions): Year Ending December 31, Total 2019 (excluding the three months ended March 31, 2019) $ 18.2 2020 15.0 2021 9.3 2022 8.5 2023 8.8 Thereafter 15.3 Total lease payments $ 75.1 Less imputed interest (16.1 ) Total $ 59.0

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2019
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 quarters ended March 31, 2019 and 2018 is presented below (in millions). General and administrative expense and depreciation expense incurred by our corporate office are not allocated to our operating segments for purposes of measuring segment operating income and were included in "Reconciling Items." We measure segment assets as property and equipment. Three Months Ended March 31, 2019 Floaters Jackups Other Operating Segments Total Reconciling Items Consolidated Total Revenues $ 232.7 $ 157.0 $ 16.2 $ 405.9 $ — $ 405.9 Operating expenses Contract drilling (exclusive of depreciation) 181.8 135.4 15.4 332.6 — 332.6 Depreciation 84.8 36.9 — 121.7 3.3 125.0 General and administrative — — — — 29.6 29.6 Operating income (loss) $ (33.9 ) $ (15.3 ) $ .8 $ (48.4 ) $ (32.9 ) $ (81.3 ) Property and equipment, net $ 9,383.6 $ 3,091.7 $ — $ 12,475.3 $ 33.6 $ 12,508.9 Three Months Ended March 31, 2018 Floaters Jackups Other Operating Segments Total Reconciling Items Consolidated Total Revenues $ 259.0 $ 143.4 $ 14.6 $ 417.0 $ — $ 417.0 Operating expenses Contract drilling (exclusive of depreciation) 185.1 126.9 13.2 325.2 — 325.2 Depreciation 75.3 36.5 — 111.8 3.4 115.2 General and administrative — — — — 27.9 27.9 Operating income (loss) $ (1.4 ) $ (20.0 ) $ 1.4 $ (20.0 ) $ (31.3 ) $ (51.3 ) Property and equipment, net $ 9,636.9 $ 3,154.3 $ — $ 12,791.2 $ 43.6 $ 12,834.8 Information about Geographic Areas As of March 31, 2019 , 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 4 11 15 Asia & Pacific Rim 4 7 11 Asia & Pacific Rim (under construction) (2) 2 1 3 Held-for-Sale (3) — 1 1 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. (2) In April 2019, we accepted delivery of ENSCO 123 which will be presented within jackups beginning in the second quarter. (3) One jackup classified as held-for-sale as of March 31, 2019 was sold in April 2019.

Supplemental Financial Informat

Supplemental Financial Information	3 Months Ended
	Mar. 31, 2019
Supplemental Financial Information [Abstract]
Supplemental Financial Information	Supplemental Financial Information Condensed Consolidated Balance Sheet Information Accounts receivable, net, consisted of the following (in millions): March 31, December 31, Trade $ 274.8 $ 301.7 Other 42.2 46.4 317.0 348.1 Allowance for doubtful accounts (3.3 ) (3.4 ) $ 313.7 $ 344.7 Other current assets consisted of the following (in millions): March 31, December 31, Materials and supplies $ 263.8 $ 268.1 Prepaid taxes 35.0 35.0 Deferred costs 28.2 23.5 Prepaid expenses 9.7 15.2 Other 18.1 19.1 $ 354.8 $ 360.9 Other assets consisted of the following (in millions): March 31, December 31, Right-of-use assets $ 47.9 $ — Supplemental executive retirement plan assets 29.3 27.2 Deferred tax assets 27.8 29.4 Deferred costs 19.1 21.5 Other 18.1 19.7 $ 142.2 $ 97.8 Accrued liabilities and other consisted of the following (in millions): March 31, December 31, Accrued interest $ 78.0 $ 100.6 Personnel costs 61.9 82.5 Deferred revenue 55.9 56.9 Income and other taxes payable 50.3 36.9 Lease liabilities 17.9 — Accrued rig holding costs 15.9 14.3 Derivative liabilities 7.2 10.9 Other 15.6 15.9 $ 302.7 $ 318.0 Other liabilities consisted of the following (in millions): March 31, December 31, Unrecognized tax benefits (inclusive of interest and penalties) $ 173.1 $ 177.0 Deferred tax liabilities 75.5 70.7 Intangible liabilities 52.7 53.5 Lease liabilities 41.1 — Supplemental executive retirement plan liabilities 30.3 28.1 Personnel costs 27.8 25.1 Deferred revenue 17.8 20.5 Deferred rent — 11.7 Other 9.0 9.4 $ 427.3 $ 396.0 Accumulated other comprehensive income consisted of the following (in millions): March 31, December 31, Derivative instruments $ 14.2 $ 12.6 Currency translation adjustment 7.3 7.3 Other (1.8 ) (1.7 ) $ 19.7 $ 18.2 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 quarters ended March 31, 2019 and 2018 were as follows: March 31, March 31, Total (1) 18 % 14 % Saudi Aramco (2) 13 % 10 % BP (3) 5 % 12 % Petrobras (4) 5 % 12 % Other 59 % 52 % 100 % 100 % (1) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our floaters segment. (2) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our jackups segment. (3) During the quarter ended March 31, 2019 , 27% of the revenues were attributable to our jackups segment while 73% of the revenues were attributable to our managed rigs. During the quarter ended March 31, 2018 , 61% of the revenues provided by BP were attributable to our floaters segment, 10% of the revenues were attributable to our jackups segment and the remainder was attributable to our managed rigs. (4) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our floaters segment. Consolidated revenues by region for the quarters ended March 31, 2019 and 2018 were as follows: March 31, March 31, Angola (1) $ 70.6 $ 61.1 Australia (2) 67.3 52.2 U.S. Gulf of Mexico (3) 54.7 53.6 Saudi Arabia (4) 53.4 43.2 United Kingdom (4) 43.4 46.6 Brazil (5) 22.0 50.3 Other 94.5 110.0 $ 405.9 $ 417.0 (1) During the quarters ended March 31, 2019 and 2018 , 86% and 98% of the revenues earned, respectively, were attributable to our floaters segment. The remaining revenues were attributable to our jackups segment. (2) During the quarters ended March 31, 2019 and 2018 , 94% and 100% of the revenues earned, respectively, were attributable to our floaters segment. The remaining revenues were attributable our jackups segment. (3) During the quarters ended March 31, 2019 and 2018 , 25% and 38% of the revenues earned, respectively, were attributable to our floaters segment, 45% and 34% of revenues earned, respectively, were attributable to our jackups segment and the remainder was attributable to our managed rigs. (4) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our jackups segment. (5) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our floaters segment.

Guarantee Of Registered Securit

Guarantee Of Registered Securities	3 Months Ended
	Mar. 31, 2019
Guarantees [Abstract]
Guarantee Of Registered Securities	Guarantee of Registered Securities In connection with the Pride acquisition in 2011, Ensco Rowan 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 Rowan 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 March 31, 2019 . The Ensco Rowan 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 Rowan plc is also a full and unconditional guarantor of the 7.2% debentures due 2027 issued by ENSCO International Incorporated during 1997, which had an aggregate outstanding principal balance of $150.0 million as of March 31, 2019 . Pride and Ensco International Incorporated are 100% owned subsidiaries of Ensco Rowan plc. All guarantees are unsecured obligations of Ensco Rowan 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 periods ended March 31, 2019 and 2018 ; the unaudited condensed consolidating statements of comprehensive loss for the three month periods ended March 31, 2019 and 2018 ; the condensed consolidating balance sheets as of March 31, 2019 (unaudited) and December 31, 2018 ; and the unaudited condensed consolidating statements of cash flows for the three month periods ended March 31, 2019 and 2018 , in accordance with Rule 3-10 of Regulation S-X. ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended March 31, 2019 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total OPERATING REVENUES $ 11.4 $ 39.5 $ — $ 430.4 $ (75.4 ) $ 405.9 OPERATING EXPENSES Contract drilling (exclusive of depreciation) 11.7 35.7 — 360.6 (75.4 ) 332.6 Depreciation — 3.7 — 121.3 — 125.0 General and administrative 14.9 .1 — 14.6 — 29.6 OPERATING LOSS (15.2 ) — — (66.1 ) — (81.3 ) OTHER EXPENSE, NET (16.1 ) (15.4 ) (20.5 ) (27.3 ) 4.1 (75.2 ) LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES (31.3 ) (15.4 ) (20.5 ) (93.4 ) 4.1 (156.5 ) INCOME TAX PROVISION — 16.6 — 14.9 — 31.5 EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX (159.1 ) 32.1 26.1 — 100.9 — NET INCOME (LOSS) (190.4 ) .1 5.6 (108.3 ) 105.0 (188.0 ) NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS — — — (2.4 ) — (2.4 ) NET INCOME (LOSS) ATTRIBUTABLE TO ENSCOROWAN $ (190.4 ) $ .1 $ 5.6 $ (110.7 ) $ 105.0 $ (190.4 ) ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended March 31, 2018 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total OPERATING REVENUES $ 12.3 $ 40.3 $ — $ 443.5 $ (79.1 ) $ 417.0 OPERATING EXPENSES Contract drilling (exclusive of depreciation) 13.4 36.6 — 354.3 (79.1 ) 325.2 Depreciation — 3.5 — 111.7 — 115.2 General and administrative 10.2 .2 — 17.5 — 27.9 OPERATING LOSS (11.3 ) — — (40.0 ) — (51.3 ) OTHER INCOME (EXPENSE), NET 5.6 (28.0 ) (30.3 ) (33.4 ) 15.4 (70.7 ) LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES (5.7 ) (28.0 ) (30.3 ) (73.4 ) 15.4 (122.0 ) INCOME TAX PROVISION — 4.3 — 14.1 — 18.4 DISCONTINUED OPERATIONS, NET — — — (.1 ) — (.1 ) EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX (134.4 ) 20.8 23.4 — 90.2 — NET LOSS (140.1 ) (11.5 ) (6.9 ) (87.6 ) 105.6 (140.5 ) NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS — — — .4 — .4 NET LOSS ATTRIBUTABLE TO ENSCOROWAN $ (140.1 ) $ (11.5 ) $ (6.9 ) $ (87.2 ) $ 105.6 $ (140.1 ) ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE LOSS Three Months Ended March 31, 2019 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total NET INCOME (LOSS) $ (190.4 ) $ .1 $ 5.6 $ (108.3 ) $ 105.0 $ (188.0 ) OTHER COMPREHENSIVE INCOME (LOSS), NET Reclassification of net losses on derivative instruments from other comprehensive income into net income — 1.6 — — — 1.6 Other — — — (.1 ) — (.1 ) NET OTHER COMPREHENSIVE INCOME (LOSS) — 1.6 — (.1 ) — 1.5 COMPREHENSIVE INCOME (LOSS) (190.4 ) 1.7 5.6 (108.4 ) 105.0 (186.5 ) COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS — — — (2.4 ) — (2.4 ) COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSCOROWAN $ (190.4 ) $ 1.7 $ 5.6 $ (110.8 ) $ 105.0 $ (188.9 ) ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE LOSS Three Months Ended March 31, 2018 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total NET LOSS $ (140.1 ) $ (11.5 ) $ (6.9 ) $ (87.6 ) $ 105.6 $ (140.5 ) OTHER COMPREHENSIVE INCOME (LOSS), NET Net change in fair value of derivatives — 1.9 — — — 1.9 Reclassification of net gains on derivative instruments from other comprehensive income into net loss — (2.2 ) — — — (2.2 ) Other — — — (.1 ) — (.1 ) NET OTHER COMPREHENSIVE INCOME (LOSS) — (.3 ) — (.1 ) — (.4 ) COMPREHENSIVE LOSS (140.1 ) (11.8 ) (6.9 ) (87.7 ) 105.6 (140.9 ) COMPREHENSIVE LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS — — — .4 — .4 COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCOROWAN $ (140.1 ) $ (11.8 ) $ (6.9 ) $ (87.3 ) $ 105.6 $ (140.5 ) ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS March 31, 2019 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total ASSETS CURRENT ASSETS Cash and cash equivalents $ 245.9 $ — $ 2.3 $ 50.2 $ — $ 298.4 Short-term investments 245.0 — — — — 245.0 Accounts receivable, net 4.1 25.4 — 284.2 — 313.7 Accounts receivable from affiliates 1,822.9 78.2 .7 54.2 (1,956.0 ) — Other .4 3.5 — 350.9 — 354.8 Total current assets 2,318.3 107.1 3.0 739.5 (1,956.0 ) 1,211.9 PROPERTY AND EQUIPMENT, AT COST 1.8 101.4 — 15,265.4 — 15,368.6 Less accumulated depreciation 1.8 71.1 — 2,786.8 — 2,859.7 Property and equipment, net — 30.3 — 12,478.6 — 12,508.9 DUE FROM AFFILIATES 2,412.6 — 61.1 2,485.7 (4,959.4 ) — INVESTMENTS IN AFFILIATES 8,372.7 3,745.8 1,226.0 — (13,344.5 ) — OTHER ASSETS 8.8 — — 133.4 — 142.2 $ 13,112.4 $ 3,883.2 $ 1,290.1 $ 15,837.2 $ (20,259.9 ) $ 13,863.0 LIABILITIES AND SHAREHOLDERS' EQUITY CURRENT LIABILITIES Accounts payable and accrued liabilities $ 64.8 $ 34.0 $ 4.6 $ 413.5 $ — $ 516.9 Accounts payable to affiliates 29.2 55.4 8.6 1,862.8 (1,956.0 ) — Total current liabilities 94.0 89.4 13.2 2,276.3 (1,956.0 ) 516.9 DUE TO AFFILIATES 1,439.3 994.5 1,362.2 1,163.4 (4,959.4 ) — LONG-TERM DEBT 3,678.4 149.4 501.5 689.2 — 5,018.5 OTHER LIABILITIES 0.4 67.2 — 359.7 — 427.3 ENSCOROWAN SHAREHOLDERS' EQUITY (DEFICIT) 7,900.3 2,582.7 (586.8 ) 11,348.8 (13,344.5 ) 7,900.5 NONCONTROLLING INTERESTS — — — (.2 ) — (.2 ) Total equity 7,900.3 2,582.7 (586.8 ) 11,348.6 (13,344.5 ) 7,900.3 $ 13,112.4 $ 3,883.2 $ 1,290.1 $ 15,837.2 $ (20,259.9 ) $ 13,863.0 ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2018 (in millions) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total ASSETS CURRENT ASSETS Cash and cash equivalents $ 199.8 $ — $ 2.7 $ 72.6 $ — $ 275.1 Short-term investments 329.0 — — — — 329.0 Accounts receivable, net 7.3 25.4 — 312.0 — 344.7 Accounts receivable from affiliates 1,861.2 171.4 — 131.7 (2,164.3 ) — Other .6 6.0 — 354.3 — 360.9 Total current assets 2,397.9 202.8 2.7 870.6 (2,164.3 ) 1,309.7 PROPERTY AND EQUIPMENT, AT COST 1.8 125.2 — 15,390.0 — 15,517.0 Less accumulated depreciation 1.8 91.3 — 2,807.7 — 2,900.8 Property and equipment, net — 33.9 — 12,582.3 — 12,616.2 DUE FROM AFFILIATES 2,413.8 234.5 125.0 2,715.1 (5,488.4 ) — INVESTMENTS IN AFFILIATES 8,522.6 3,713.7 1,199.9 — (13,436.2 ) — OTHER ASSETS 8.1 — — 89.7 — 97.8 $ 13,342.4 $ 4,184.9 $ 1,327.6 $ 16,257.7 $ (21,088.9 ) $ 14,023.7 LIABILITIES AND SHAREHOLDERS' EQUITY CURRENT LIABILITIES Accounts payable and accrued liabilities $ 85.3 $ 32.0 $ 12.7 $ 398.5 $ — $ 528.5 Accounts payable to affiliates 59.7 139.5 38.2 1,926.9 (2,164.3 ) — Total current liabilities 145.0 171.5 50.9 2,325.4 (2,164.3 ) 528.5 DUE TO AFFILIATES 1,432.0 1,226.9 1,366.5 1,463.0 (5,488.4 ) — LONG-TERM DEBT 3,676.5 149.3 502.6 682.0 — 5,010.4 OTHER LIABILITIES .1 64.3 — 331.6 — 396.0 ENSCOROWAN SHAREHOLDERS' EQUITY (DEFICIT) 8,088.8 2,572.9 (592.4 ) 11,458.3 (13,436.2 ) 8,091.4 NONCONTROLLING INTERESTS — — — (2.6 ) — (2.6 ) Total equity 8,088.8 2,572.9 (592.4 ) 11,455.7 (13,436.2 ) 8,088.8 $ 13,342.4 $ 4,184.9 $ 1,327.6 $ 16,257.7 $ (21,088.9 ) $ 14,023.7 ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Three Months Ended March 31, 2019 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-guarantor Subsidiaries Consolidating Adjustments Total OPERATING ACTIVITIES Net cash provided by (used in) operating activities $ (45.9 ) $ (43.0 ) $ (55.2 ) $ 119.7 $ — $ (24.4 ) INVESTING ACTIVITIES Maturities of short-term investments 204.0 — — — — 204.0 Purchases of short-term investments (120.0 ) — — — — (120.0 ) Additions to property and equipment — — — (29.0 ) — (29.0 ) Other — — — .3 — .3 Net cash provided by (used in) in investing activities 84.0 — — (28.7 ) — 55.3 FINANCING ACTIVITIES Cash dividends paid (4.5 ) — — — — (4.5 ) Advances from (to) affiliates 15.3 43.0 54.8 (113.1 ) — — Other (2.8 ) — — — — (2.8 ) Net cash provided by (used in) financing activities 8.0 43.0 54.8 (113.1 ) — (7.3 ) Effect of exchange rate changes on cash and cash equivalents — — — (.3 ) — (.3 ) INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 46.1 — (.4 ) (22.4 ) — 23.3 CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 199.8 — 2.7 72.6 — 275.1 CASH AND CASH EQUIVALENTS, END OF PERIOD $ 245.9 $ — $ 2.3 $ 50.2 $ — $ 298.4 ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Three Months Ended March 31, 2018 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-guarantor Subsidiaries Consolidating Adjustments Total OPERATING ACTIVITIES Net cash provided by (used in) operating activities of continuing operations $ 18.0 $ (36.9 ) $ (45.0 ) $ 103.4 $ — $ 39.5 INVESTING ACTIVITIES Purchases of short-term investments (349.0 ) — — — — (349.0 ) Maturities of short-term investments 390.0 — — — 390.0 Additions to property and equipment — — — (269.3 ) — (269.3 ) Purchase of affiliate debt (552.5 ) — — — 552.5 — Sale of affiliate debt 479.0 — — — (479.0 ) — Other — — — .1 — .1 Net cash provided by (used in) investing activities of continuing operations (32.5 ) — — (269.2 ) 73.5 (228.2 ) FINANCING ACTIVITIES Proceeds from issuance of senior notes 1,000.0 — — — — 1,000.0 Reduction of long-term borrowings (159.7 ) — (537.8 ) — (73.5 ) (771.0 ) Debt financing costs (16.8 ) — — — — (16.8 ) Cash dividends paid (4.5 ) — — — — (4.5 ) Advances from (to) affiliates (666.7 ) 36.9 571.7 58.1 — — Other (1.2 ) — — — — (1.2 ) Net cash provided by financing activities 151.1 36.9 33.9 58.1 (73.5 ) 206.5 Net cash provided by discontinued operations — — — 2.5 — 2.5 Effect of exchange rate changes on cash and cash equivalents — — — (.3 ) — (.3 ) INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 136.6 — (11.1 ) (105.5 ) — 20.0 CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 185.2 — 25.6 234.6 — 445.4 CASH AND CASH EQUIVALENTS, END OF PERIOD $ 321.8 $ — $ 14.5 $ 129.1 $ — $ 465.4

Subsequent Events (Notes)

Subsequent Events (Notes)	3 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events Upon closing of the Rowan Transaction, we effected a consolidation (being a reverse stock split under English law) where every four existing Class A ordinary shares, each with a nominal value of $0.10 , were consolidated into one Class A ordinary share, each with a nominal value of $0.40 (the “Reverse Stock Split”). Our shares began trading on a reverse stock split-adjusted basis on April 11, 2019. All share and per share data included in this report have been retroactively adjusted to reflect the Reverse Stock Split. Effective upon closing of the Rowan Transaction, we amended our credit facility to, among other changes, increase the borrowing capacity. Previously, our borrowing capacity was $2.0 billion through September 2019, $1.3 billion through September 2020 and $1.2 billion through September 2022. Subsequent to the amendment, our borrowing capacity is $2.3 billion through September 30, 2019 and $1.7 billion through September 30, 2022. The credit agreement governing the credit facility includes an accordion feature allowing us to increase future commitments up to an aggregate amount not to exceed $250.0 million .

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset and Liability	The following table summarizes our trade receivables, contract assets and contract liabilities (in millions): March 31, 2019 December 31, 2018 Current contract assets $ 3.1 $ 4.0 Current contract liabilities (deferred revenue) $ 55.9 $ 56.9 Noncurrent contract liabilities (deferred revenue) $ 17.8 $ 20.5 Significant changes in contract assets and liabilities during the three-month period ended March 31, 2019 are as follows (in millions): Contract Assets Contract Liabilities Balance as of December 31, 2018 $ 4.0 $ 77.4 Revenue recognized in advance of right to bill customer .1 — Increase due to cash received — 22.3 Decrease due to amortization of deferred revenue that was included in the beginning contract liability balance — (24.6 ) Decrease due to amortization of deferred revenue that was added during the period — (1.4 ) Decrease due to transfer to receivables during the period (1.0 ) — Balance as of March 31, 2019 $ 3.1 $ 73.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	Expected future amortization of our contract liabilities and deferred costs recorded as of March 31, 2019 is set forth in the table below (in millions): Remaining 2019 2020 2021 2022 and Thereafter Total Amortization of contract liabilities $ 52.4 $ 11.8 $ 7.7 $ 1.8 $ 73.7 Amortization of deferred costs $ 25.4 $ 10.4 $ 2.7 $ 1.5 $ 40.0

Rowan Transaction Rowan Trans_2

Rowan Transaction Rowan Transaction (Tables)	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The provisional amounts for assets acquired and liabilities assumed are based on preliminary estimates of their fair values as of the Transaction Date and are as follows (in millions): Estimated Fair Value Assets: Cash and cash equivalents $ 928.9 Accounts receivable (1) 199.1 Other current assets 200.0 Long-term notes receivable from ARO 454.5 Investment in ARO 152.3 Property and equipment 2,755.3 Other assets 184.4 Liabilities: Accounts payable and accrued liabilities 252.1 Current portion of long-term debt 181.2 Long-term debt 1,910.9 Other liabilities 372.0 Net assets acquired 2,158.3 Less: Transaction consideration (1,404.6 ) Bargain purchase gain $ 753.7 (1) Gross contractual amounts receivable totaled $201.1 million as of the Transaction Date.
Business Acquisition, Pro Forma Information [Table Text Block]	The pro forma results do not include any potential synergies or non-recurring charges that may result directly from the Rowan Transaction. (in millions, except per share amounts) Three Months Ended March 31, 2019 (1) 2018 Revenues $ 580.4 $ 628.2 Net loss $ (271.6 ) $ (191.4 ) Earnings per share - basic and diluted $ (1.38 ) $ (0.97 ) (1) Pro forma net income and earnings per share were adjusted to exclude an aggregate $9.4 million of transaction-related and integration costs incurred during the three-month period ended March 31, 2019 .

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Schedule Of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis	The following fair value hierarchy table categorizes information regarding our net financial assets measured at fair value on a recurring basis (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 March 31, 2019 Supplemental executive retirement plan assets $ 29.3 $ — $ — $ 29.3 Total financial assets $ 29.3 $ — $ — $ 29.3 Derivatives, net $ — $ (6.9 ) $ — $ (6.9 ) Total financial liabilities $ — $ (6.9 ) $ — $ (6.9 ) As of December 31, 2018 Supplemental executive retirement plan assets $ 27.2 $ — $ — $ 27.2 Total financial assets $ 27.2 $ — $ — $ 27.2 Derivatives, net $ — $ (10.7 ) $ — $ (10.7 ) Total financial liabilities $ — $ (10.7 ) $ — $ (10.7 )
Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments	The carrying values and estimated fair values of our debt instruments were as follows (in millions): March 31, December 31, Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value 6.875% senior notes due 2020 $ 126.9 $ 122.8 $ 127.5 $ 121.6 4.70% senior notes due 2021 112.9 108.5 112.7 101.8 3.00% exchangeable senior notes due 2024 (1) 674.7 655.5 666.8 575.5 4.50% senior notes due 2024 620.0 476.0 619.8 405.2 8.00% senior notes due 2024 336.7 305.1 337.0 273.7 5.20% senior notes due 2025 664.6 517.7 664.4 443.9 7.75% senior notes due 2026 985.6 849.8 985.0 725.5 7.20% debentures due 2027 149.4 121.1 149.3 109.1 7.875% senior notes due 2040 374.6 238.2 375.0 223.2 5.75% senior notes due 2044 973.1 648.2 972.9 566.3 Total $ 5,018.5 $ 4,042.9 $ 5,010.4 $ 3,545.8 (1) 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 $836.9 million as of March 31, 2019 .

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, December 31, March 31, December 31, Derivatives Designated as Hedging Instruments Foreign currency forward contracts - current (1) $ .2 $ .2 $ 5.1 $ 8.3 Foreign currency forward contracts - non-current (2) .1 — .2 .4 .3 .2 5.3 8.7 Derivatives Not Designated as Hedging Instruments Foreign currency forward contracts - current (1) .2 .4 2.1 2.6 Total $ .5 $ .6 $ 7.4 $ 11.3 (1) Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets. (2) Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets 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 loss for the quarter s ended March 31, 2019 and 2018 were as follows (in millions): Gain Recognized in Other Comprehensive Income ("OCI") (Effective Portion) (Gain) Loss Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion) (1) Loss Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing) (2) 2019 2018 2019 2018 2019 2018 Interest rate lock contracts (3) $ — $ — $ .1 $ .1 $ — $ — Foreign currency forward contracts (4) — 1.9 1.5 (2.3 ) — (.2 ) Total $ — $ 1.9 $ 1.6 $ (2.2 ) $ — $ (.2 ) (1) Changes in the fair value of cash flow hedges are recorded in AOCI. Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction. (2) Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our condensed consolidated statements of operations. As a result of our adoption of Update 2017-12, which we adopted effective January 1, 2019, ineffectiveness is no longer separately measured and recognized. See additional information in "Note 1 - Unaudited Condensed Consolidated Financial Statements". (3) Losses on interest rate lock derivatives reclassified from AOCI into income (effective portion) were included in interest expense, net, in our condensed consolidated statements of operations. (4) During the first quarter of 2019 , $1.7 million of losses were reclassified from AOCI into contract drilling expense and $0.2 million of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the prior year quarter, $2.1 million of gains were reclassified from AOCI into contract drilling expense and $0.2 million of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Reconciliation Of Net Income Attributable To Ensco Shares	The following table is a reconciliation of income from continuing operations attributable to EnscoRowan shares used in our basic and diluted EPS computations for the quarter s ended March 31, 2019 and 2018 (in millions): 2019 2018 Loss from continuing operations attributable to EnscoRowan $ (190.4 ) $ (140.0 ) Income from continuing operations allocated to non-vested share awards (.1 ) (.1 ) Loss from continuing operations attributable to EnscoRowan shares $ (190.5 ) $ (140.1 )

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2019
Shareholders' Equity [Abstract]
Schedule Of Activity In Our Various Shareholders Equity [Table Text Block]	Activity in our various shareholders' equity accounts for the three-month periods ended March 31, 2019 and 2018 were as follows (in millions): Shares Par Value Additional Paid-in Capital Retained Earnings AOCI Treasury Shares Non-controlling Interest BALANCE, December 31, 2018 115.2 $ 46.2 $ 7,225.0 $ 874.2 $ 18.2 $ (72.2 ) $ (2.6 ) Net loss — — — (190.4 ) — — 2.4 Dividends paid ($0.04 per share) — — — (4.5 ) — — — Shares issued under share-based compensation plans, net — — (.1 ) — — .1 — Repurchase of shares — — — — — (2.8 ) — Share-based compensation cost — — 5.3 — — — — Net other comprehensive income — — — — 1.5 — — BALANCE, March 31, 2019 115.2 $ 46.2 $ 7,230.2 $ 679.3 $ 19.7 $ (74.9 ) $ (0.2 ) Shares Par Value Additional Retained AOCI Treasury Non-controlling BALANCE, December 31, 2017 111.8 $ 44.8 $ 7,195.0 $ 1,532.7 $ 28.6 $ (69.0 ) $ (2.1 ) Net loss — — — (140.1 ) — — (.4 ) Dividends paid ($0.04 per share) — — — (4.4 ) — — — Cumulative-effect due to ASU 2018-02 — — — (.8 ) .8 — — Shares issued under share-based compensation plans, net — — (.1 ) — — .1 — Repurchase of shares — — — — — (1.1 ) — Share-based compensation cost — — 7.5 — — — — Net other comprehensive loss — — — — (.4 ) — — BALANCE, March 31, 2018 111.8 $ 44.8 $ 7,202.4 $ 1,387.4 $ 29.0 $ (70.0 ) $ (2.5 )

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Components of Lease Expense	The components of lease expense are as follows (in millions): Three Months Ended March 31, 2019 Long-term operating lease cost $ 6.2 Short-term operating lease cost 3.1 Sublease income (.4 ) Total operating lease cost $ 8.9
Supplemental Balance Sheet information Related to Operating Leases	Supplemental balance sheet information related to our operating leases is as follows (in millions, except lease term and discount rate): March 31, 2019 Operating lease right-of-use assets $ 47.9 Current lease liability $ 17.9 Long-term lease liability 41.1 Total operating lease liabilities $ 59.0 Weighted-average remaining lease term (in years) 5.2 Weighted-average discount rate (1) 8.71 % (1) Represents our estimated incremental borrowing cost on a secured basis for similar terms as the underlying lease.
Maturities of Lease Liabilities	Maturities of lease liabilities as of March 31, 2019 were as follows (in millions): Year Ending December 31, Total 2019 (excluding the three months ended March 31, 2019) $ 18.2 2020 15.0 2021 9.3 2022 8.5 2023 8.8 Thereafter 15.3 Total lease payments $ 75.1 Less imputed interest (16.1 ) Total $ 59.0

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Schedule Of Segment Reporting Information	Three Months Ended March 31, 2019 Floaters Jackups Other Operating Segments Total Reconciling Items Consolidated Total Revenues $ 232.7 $ 157.0 $ 16.2 $ 405.9 $ — $ 405.9 Operating expenses Contract drilling (exclusive of depreciation) 181.8 135.4 15.4 332.6 — 332.6 Depreciation 84.8 36.9 — 121.7 3.3 125.0 General and administrative — — — — 29.6 29.6 Operating income (loss) $ (33.9 ) $ (15.3 ) $ .8 $ (48.4 ) $ (32.9 ) $ (81.3 ) Property and equipment, net $ 9,383.6 $ 3,091.7 $ — $ 12,475.3 $ 33.6 $ 12,508.9 Three Months Ended March 31, 2018 Floaters Jackups Other Operating Segments Total Reconciling Items Consolidated Total Revenues $ 259.0 $ 143.4 $ 14.6 $ 417.0 $ — $ 417.0 Operating expenses Contract drilling (exclusive of depreciation) 185.1 126.9 13.2 325.2 — 325.2 Depreciation 75.3 36.5 — 111.8 3.4 115.2 General and administrative — — — — 27.9 27.9 Operating income (loss) $ (1.4 ) $ (20.0 ) $ 1.4 $ (20.0 ) $ (31.3 ) $ (51.3 ) Property and equipment, net $ 9,636.9 $ 3,154.3 $ — $ 12,791.2 $ 43.6 $ 12,834.8
Schedule Of Geographic Distribution Of Rigs By Segment	As of March 31, 2019 , 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 4 11 15 Asia & Pacific Rim 4 7 11 Asia & Pacific Rim (under construction) (2) 2 1 3 Held-for-Sale (3) — 1 1 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. (2) In April 2019, we accepted delivery of ENSCO 123 which will be presented within jackups beginning in the second quarter. (3) One jackup classified as held-for-sale as of March 31, 2019 was sold in April 2019.

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	3 Months Ended
	Mar. 31, 2019
Supplemental Financial Information [Abstract]
Accounts Receivable, Net	Accounts receivable, net, consisted of the following (in millions): March 31, December 31, Trade $ 274.8 $ 301.7 Other 42.2 46.4 317.0 348.1 Allowance for doubtful accounts (3.3 ) (3.4 ) $ 313.7 $ 344.7
Other Current Assets	Other current assets consisted of the following (in millions): March 31, December 31, Materials and supplies $ 263.8 $ 268.1 Prepaid taxes 35.0 35.0 Deferred costs 28.2 23.5 Prepaid expenses 9.7 15.2 Other 18.1 19.1 $ 354.8 $ 360.9
Other Assets, Net	Other assets consisted of the following (in millions): March 31, December 31, Right-of-use assets $ 47.9 $ — Supplemental executive retirement plan assets 29.3 27.2 Deferred tax assets 27.8 29.4 Deferred costs 19.1 21.5 Other 18.1 19.7 $ 142.2 $ 97.8
Accrued Liabilities And Other	Accrued liabilities and other consisted of the following (in millions): March 31, December 31, Accrued interest $ 78.0 $ 100.6 Personnel costs 61.9 82.5 Deferred revenue 55.9 56.9 Income and other taxes payable 50.3 36.9 Lease liabilities 17.9 — Accrued rig holding costs 15.9 14.3 Derivative liabilities 7.2 10.9 Other 15.6 15.9 $ 302.7 $ 318.0
Other Liabilities	Other liabilities consisted of the following (in millions): March 31, December 31, Unrecognized tax benefits (inclusive of interest and penalties) $ 173.1 $ 177.0 Deferred tax liabilities 75.5 70.7 Intangible liabilities 52.7 53.5 Lease liabilities 41.1 — Supplemental executive retirement plan liabilities 30.3 28.1 Personnel costs 27.8 25.1 Deferred revenue 17.8 20.5 Deferred rent — 11.7 Other 9.0 9.4 $ 427.3 $ 396.0
Accumulated other comprehensive income	Accumulated other comprehensive income consisted of the following (in millions): March 31, December 31, Derivative instruments $ 14.2 $ 12.6 Currency translation adjustment 7.3 7.3 Other (1.8 ) (1.7 ) $ 19.7 $ 18.2
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]	Consolidated revenues by customer for the quarters ended March 31, 2019 and 2018 were as follows: March 31, March 31, Total (1) 18 % 14 % Saudi Aramco (2) 13 % 10 % BP (3) 5 % 12 % Petrobras (4) 5 % 12 % Other 59 % 52 % 100 % 100 % (1) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our floaters segment. (2) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our jackups segment. (3) During the quarter ended March 31, 2019 , 27% of the revenues were attributable to our jackups segment while 73% of the revenues were attributable to our managed rigs. During the quarter ended March 31, 2018 , 61% of the revenues provided by BP were attributable to our floaters segment, 10% of the revenues were attributable to our jackups segment and the remainder was attributable to our managed rigs. (4) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our floaters segment.
Revenue from External Customers by Geographic Areas [Table Text Block]	Consolidated revenues by region for the quarters ended March 31, 2019 and 2018 were as follows: March 31, March 31, Angola (1) $ 70.6 $ 61.1 Australia (2) 67.3 52.2 U.S. Gulf of Mexico (3) 54.7 53.6 Saudi Arabia (4) 53.4 43.2 United Kingdom (4) 43.4 46.6 Brazil (5) 22.0 50.3 Other 94.5 110.0 $ 405.9 $ 417.0 (1) During the quarters ended March 31, 2019 and 2018 , 86% and 98% of the revenues earned, respectively, were attributable to our floaters segment. The remaining revenues were attributable to our jackups segment. (2) During the quarters ended March 31, 2019 and 2018 , 94% and 100% of the revenues earned, respectively, were attributable to our floaters segment. The remaining revenues were attributable our jackups segment. (3) During the quarters ended March 31, 2019 and 2018 , 25% and 38% of the revenues earned, respectively, were attributable to our floaters segment, 45% and 34% of revenues earned, respectively, were attributable to our jackups segment and the remainder was attributable to our managed rigs. (4) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our jackups segment. (5) During the quarters ended March 31, 2019 and 2018 , all revenues were attributable to our floaters segment.

Guarantee Of Registered Secur_2

Guarantee Of Registered Securities (Tables)	3 Months Ended
	Mar. 31, 2019
Guarantees [Abstract]
Condensed Consolidating Statements Of Income	ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended March 31, 2019 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total OPERATING REVENUES $ 11.4 $ 39.5 $ — $ 430.4 $ (75.4 ) $ 405.9 OPERATING EXPENSES Contract drilling (exclusive of depreciation) 11.7 35.7 — 360.6 (75.4 ) 332.6 Depreciation — 3.7 — 121.3 — 125.0 General and administrative 14.9 .1 — 14.6 — 29.6 OPERATING LOSS (15.2 ) — — (66.1 ) — (81.3 ) OTHER EXPENSE, NET (16.1 ) (15.4 ) (20.5 ) (27.3 ) 4.1 (75.2 ) LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES (31.3 ) (15.4 ) (20.5 ) (93.4 ) 4.1 (156.5 ) INCOME TAX PROVISION — 16.6 — 14.9 — 31.5 EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX (159.1 ) 32.1 26.1 — 100.9 — NET INCOME (LOSS) (190.4 ) .1 5.6 (108.3 ) 105.0 (188.0 ) NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS — — — (2.4 ) — (2.4 ) NET INCOME (LOSS) ATTRIBUTABLE TO ENSCOROWAN $ (190.4 ) $ .1 $ 5.6 $ (110.7 ) $ 105.0 $ (190.4 ) ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS Three Months Ended March 31, 2018 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total OPERATING REVENUES $ 12.3 $ 40.3 $ — $ 443.5 $ (79.1 ) $ 417.0 OPERATING EXPENSES Contract drilling (exclusive of depreciation) 13.4 36.6 — 354.3 (79.1 ) 325.2 Depreciation — 3.5 — 111.7 — 115.2 General and administrative 10.2 .2 — 17.5 — 27.9 OPERATING LOSS (11.3 ) — — (40.0 ) — (51.3 ) OTHER INCOME (EXPENSE), NET 5.6 (28.0 ) (30.3 ) (33.4 ) 15.4 (70.7 ) LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES (5.7 ) (28.0 ) (30.3 ) (73.4 ) 15.4 (122.0 ) INCOME TAX PROVISION — 4.3 — 14.1 — 18.4 DISCONTINUED OPERATIONS, NET — — — (.1 ) — (.1 ) EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX (134.4 ) 20.8 23.4 — 90.2 — NET LOSS (140.1 ) (11.5 ) (6.9 ) (87.6 ) 105.6 (140.5 ) NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS — — — .4 — .4 NET LOSS ATTRIBUTABLE TO ENSCOROWAN $ (140.1 ) $ (11.5 ) $ (6.9 ) $ (87.2 ) $ 105.6 $ (140.1 )
Condensed Consolidating Statements Of Comprehensive Income	ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE LOSS Three Months Ended March 31, 2019 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total NET INCOME (LOSS) $ (190.4 ) $ .1 $ 5.6 $ (108.3 ) $ 105.0 $ (188.0 ) OTHER COMPREHENSIVE INCOME (LOSS), NET Reclassification of net losses on derivative instruments from other comprehensive income into net income — 1.6 — — — 1.6 Other — — — (.1 ) — (.1 ) NET OTHER COMPREHENSIVE INCOME (LOSS) — 1.6 — (.1 ) — 1.5 COMPREHENSIVE INCOME (LOSS) (190.4 ) 1.7 5.6 (108.4 ) 105.0 (186.5 ) COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS — — — (2.4 ) — (2.4 ) COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO ENSCOROWAN $ (190.4 ) $ 1.7 $ 5.6 $ (110.8 ) $ 105.0 $ (188.9 ) ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE LOSS Three Months Ended March 31, 2018 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total NET LOSS $ (140.1 ) $ (11.5 ) $ (6.9 ) $ (87.6 ) $ 105.6 $ (140.5 ) OTHER COMPREHENSIVE INCOME (LOSS), NET Net change in fair value of derivatives — 1.9 — — — 1.9 Reclassification of net gains on derivative instruments from other comprehensive income into net loss — (2.2 ) — — — (2.2 ) Other — — — (.1 ) — (.1 ) NET OTHER COMPREHENSIVE INCOME (LOSS) — (.3 ) — (.1 ) — (.4 ) COMPREHENSIVE LOSS (140.1 ) (11.8 ) (6.9 ) (87.7 ) 105.6 (140.9 ) COMPREHENSIVE LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS — — — .4 — .4 COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCOROWAN $ (140.1 ) $ (11.8 ) $ (6.9 ) $ (87.3 ) $ 105.6 $ (140.5 )
Condensed Consolidating Balance Sheets	ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS March 31, 2019 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total ASSETS CURRENT ASSETS Cash and cash equivalents $ 245.9 $ — $ 2.3 $ 50.2 $ — $ 298.4 Short-term investments 245.0 — — — — 245.0 Accounts receivable, net 4.1 25.4 — 284.2 — 313.7 Accounts receivable from affiliates 1,822.9 78.2 .7 54.2 (1,956.0 ) — Other .4 3.5 — 350.9 — 354.8 Total current assets 2,318.3 107.1 3.0 739.5 (1,956.0 ) 1,211.9 PROPERTY AND EQUIPMENT, AT COST 1.8 101.4 — 15,265.4 — 15,368.6 Less accumulated depreciation 1.8 71.1 — 2,786.8 — 2,859.7 Property and equipment, net — 30.3 — 12,478.6 — 12,508.9 DUE FROM AFFILIATES 2,412.6 — 61.1 2,485.7 (4,959.4 ) — INVESTMENTS IN AFFILIATES 8,372.7 3,745.8 1,226.0 — (13,344.5 ) — OTHER ASSETS 8.8 — — 133.4 — 142.2 $ 13,112.4 $ 3,883.2 $ 1,290.1 $ 15,837.2 $ (20,259.9 ) $ 13,863.0 LIABILITIES AND SHAREHOLDERS' EQUITY CURRENT LIABILITIES Accounts payable and accrued liabilities $ 64.8 $ 34.0 $ 4.6 $ 413.5 $ — $ 516.9 Accounts payable to affiliates 29.2 55.4 8.6 1,862.8 (1,956.0 ) — Total current liabilities 94.0 89.4 13.2 2,276.3 (1,956.0 ) 516.9 DUE TO AFFILIATES 1,439.3 994.5 1,362.2 1,163.4 (4,959.4 ) — LONG-TERM DEBT 3,678.4 149.4 501.5 689.2 — 5,018.5 OTHER LIABILITIES 0.4 67.2 — 359.7 — 427.3 ENSCOROWAN SHAREHOLDERS' EQUITY (DEFICIT) 7,900.3 2,582.7 (586.8 ) 11,348.8 (13,344.5 ) 7,900.5 NONCONTROLLING INTERESTS — — — (.2 ) — (.2 ) Total equity 7,900.3 2,582.7 (586.8 ) 11,348.6 (13,344.5 ) 7,900.3 $ 13,112.4 $ 3,883.2 $ 1,290.1 $ 15,837.2 $ (20,259.9 ) $ 13,863.0 ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2018 (in millions) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-Guarantor Subsidiaries Consolidating Adjustments Total ASSETS CURRENT ASSETS Cash and cash equivalents $ 199.8 $ — $ 2.7 $ 72.6 $ — $ 275.1 Short-term investments 329.0 — — — — 329.0 Accounts receivable, net 7.3 25.4 — 312.0 — 344.7 Accounts receivable from affiliates 1,861.2 171.4 — 131.7 (2,164.3 ) — Other .6 6.0 — 354.3 — 360.9 Total current assets 2,397.9 202.8 2.7 870.6 (2,164.3 ) 1,309.7 PROPERTY AND EQUIPMENT, AT COST 1.8 125.2 — 15,390.0 — 15,517.0 Less accumulated depreciation 1.8 91.3 — 2,807.7 — 2,900.8 Property and equipment, net — 33.9 — 12,582.3 — 12,616.2 DUE FROM AFFILIATES 2,413.8 234.5 125.0 2,715.1 (5,488.4 ) — INVESTMENTS IN AFFILIATES 8,522.6 3,713.7 1,199.9 — (13,436.2 ) — OTHER ASSETS 8.1 — — 89.7 — 97.8 $ 13,342.4 $ 4,184.9 $ 1,327.6 $ 16,257.7 $ (21,088.9 ) $ 14,023.7 LIABILITIES AND SHAREHOLDERS' EQUITY CURRENT LIABILITIES Accounts payable and accrued liabilities $ 85.3 $ 32.0 $ 12.7 $ 398.5 $ — $ 528.5 Accounts payable to affiliates 59.7 139.5 38.2 1,926.9 (2,164.3 ) — Total current liabilities 145.0 171.5 50.9 2,325.4 (2,164.3 ) 528.5 DUE TO AFFILIATES 1,432.0 1,226.9 1,366.5 1,463.0 (5,488.4 ) — LONG-TERM DEBT 3,676.5 149.3 502.6 682.0 — 5,010.4 OTHER LIABILITIES .1 64.3 — 331.6 — 396.0 ENSCOROWAN SHAREHOLDERS' EQUITY (DEFICIT) 8,088.8 2,572.9 (592.4 ) 11,458.3 (13,436.2 ) 8,091.4 NONCONTROLLING INTERESTS — — — (2.6 ) — (2.6 ) Total equity 8,088.8 2,572.9 (592.4 ) 11,455.7 (13,436.2 ) 8,088.8 $ 13,342.4 $ 4,184.9 $ 1,327.6 $ 16,257.7 $ (21,088.9 ) $ 14,023.7
Condensed Consolidating Statements Of Cash Flows	ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Three Months Ended March 31, 2019 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-guarantor Subsidiaries Consolidating Adjustments Total OPERATING ACTIVITIES Net cash provided by (used in) operating activities $ (45.9 ) $ (43.0 ) $ (55.2 ) $ 119.7 $ — $ (24.4 ) INVESTING ACTIVITIES Maturities of short-term investments 204.0 — — — — 204.0 Purchases of short-term investments (120.0 ) — — — — (120.0 ) Additions to property and equipment — — — (29.0 ) — (29.0 ) Other — — — .3 — .3 Net cash provided by (used in) in investing activities 84.0 — — (28.7 ) — 55.3 FINANCING ACTIVITIES Cash dividends paid (4.5 ) — — — — (4.5 ) Advances from (to) affiliates 15.3 43.0 54.8 (113.1 ) — — Other (2.8 ) — — — — (2.8 ) Net cash provided by (used in) financing activities 8.0 43.0 54.8 (113.1 ) — (7.3 ) Effect of exchange rate changes on cash and cash equivalents — — — (.3 ) — (.3 ) INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 46.1 — (.4 ) (22.4 ) — 23.3 CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 199.8 — 2.7 72.6 — 275.1 CASH AND CASH EQUIVALENTS, END OF PERIOD $ 245.9 $ — $ 2.3 $ 50.2 $ — $ 298.4 ENSCO ROWAN PLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS Three Months Ended March 31, 2018 (in millions) (Unaudited) Ensco Rowan plc ENSCO International Incorporated Pride International LLC Other Non-guarantor Subsidiaries Consolidating Adjustments Total OPERATING ACTIVITIES Net cash provided by (used in) operating activities of continuing operations $ 18.0 $ (36.9 ) $ (45.0 ) $ 103.4 $ — $ 39.5 INVESTING ACTIVITIES Purchases of short-term investments (349.0 ) — — — — (349.0 ) Maturities of short-term investments 390.0 — — — 390.0 Additions to property and equipment — — — (269.3 ) — (269.3 ) Purchase of affiliate debt (552.5 ) — — — 552.5 — Sale of affiliate debt 479.0 — — — (479.0 ) — Other — — — .1 — .1 Net cash provided by (used in) investing activities of continuing operations (32.5 ) — — (269.2 ) 73.5 (228.2 ) FINANCING ACTIVITIES Proceeds from issuance of senior notes 1,000.0 — — — — 1,000.0 Reduction of long-term borrowings (159.7 ) — (537.8 ) — (73.5 ) (771.0 ) Debt financing costs (16.8 ) — — — — (16.8 ) Cash dividends paid (4.5 ) — — — — (4.5 ) Advances from (to) affiliates (666.7 ) 36.9 571.7 58.1 — — Other (1.2 ) — — — — (1.2 ) Net cash provided by financing activities 151.1 36.9 33.9 58.1 (73.5 ) 206.5 Net cash provided by discontinued operations — — — 2.5 — 2.5 Effect of exchange rate changes on cash and cash equivalents — — — (.3 ) — (.3 ) INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 136.6 — (11.1 ) (105.5 ) — 20.0 CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 185.2 — 25.6 234.6 — 445.4 CASH AND CASH EQUIVALENTS, END OF PERIOD $ 321.8 $ — $ 14.5 $ 129.1 $ — $ 465.4

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Financial Statements New Accounting Pronouncements or Changes in Accounting Principle (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Accounting Changes and Error Corrections [Abstract]
Operating Lease, Liability	$ 59	$ 64.6
Operating lease right-of-use assets	$ 47.9	$ 53.7	$ 0

Revenue Recognition - Component

Revenue Recognition - Components Of Contract Assets, And Contract Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Current contract assets	$ 3.1	$ 4
Current contract liabilities (deferred revenue)	55.9	56.9
Noncurrent contract liabilities (deferred revenue)	$ 17.8	$ 20.5

Revenue Recognition - Schedule

Revenue Recognition - Schedule Of Contract Assets And Liabilities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	$ 0.1
Change in Contract With Customer, Asset [Roll Forward]
Balance as of December 31, 2018	4
Decrease due to transfer to receivables during the period	(1)
Balance as of March 31, 2019	3.1
Change in Contract With Customer, Liability [Roll Forward]
Balance as of December 31, 2018	77.4
Increase due to cash received	22.3
Decrease due to amortization of deferred revenue that was included in the beginning contract liability balance	(24.6)
Decrease due to amortization of deferred revenue that was added during the period	(1.4)
Balance as of March 31, 2019	$ 73.7

Revenue Recognition - Future Am

Revenue Recognition - Future Amortization Of Contract Liabilities And Deferred Costs (Details) $ in Millions	Mar. 31, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining 2019	$ 25.4
2020	10.4
2021	2.7
2022 and Thereafter	1.5
Total	40
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	52.4
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 performance obligation	$ 11.8
Expected timing of satisfaction, period	9 months
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 performance obligation	$ 7.7
Expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1.8
Expected timing of satisfaction, period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 73.7

Revenue Recognition - Narrative

Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Capitalized Contract Cost [Line Items]
Capitalized contract cost	$ 40
Upfront Rig Mobilizations And Certain Contract Preparation
Capitalized Contract Cost [Line Items]
Capitalized contract cost	26.6		$ 23.5
Amortization of capitalized contract cost	6.4	$ 6.8
Deferred Certification Costs
Capitalized Contract Cost [Line Items]
Capitalized contract cost	13.4		$ 13.6
Amortization of capitalized contract cost	$ 2.8	$ 3.1

Rowan Transaction (Details)

Rowan Transaction (Details) $ / shares in Units, shares in Millions, $ in Millions	Apr. 11, 2019USD ($)$ / sharesshares	Mar. 31, 2019USD ($)jackup	Oct. 05, 2018$ / shares
Business Acquisition [Line Items]
Number of Rigs Owned by ARO | jackup		7
Number of jackups leased by ARO | jackup		9
Number of Newbuild Jackup Rigs | jackup		20
Years for Jackup Rig Orders		10 years
Number of Drillships owned by legacy Rowan | jackup		4
Number of Jackup Rigs Owned | jackup		19
Rowan Companies [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount		$ 201.1
Business Combination, Acquisition Related Costs		$ 5.9
Rowan Companies [Member] | Common Class A [Member]
Business Acquisition [Line Items]
Share Price | $ / shares			$ 33.92
Subsequent Event [Member] | Rowan Companies [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned, Per Share | $ / shares	$ 43.67
Business Combination, Consideration Transferred	$ 1,400
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	$ 0
Subsequent Event [Member] | Rowan Companies [Member] | Common Class A [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned, Per Share | $ / shares	$ 2.750
Share Price | $ / shares	$ 15.88
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	88.3
Scenario, Forecast [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs	$ 14.2
Scenario, Forecast [Member] | Rowan Companies [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 1,404.6

Rowan Transaction Schedule of R

Rowan Transaction Schedule of Recognized Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Apr. 11, 2019	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Business Combination, Bargain Purchase, Gain Recognized, Amount		$ 0	$ 16.6
Rowan Companies [Member]
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs		9.4
Business Combination, Acquired Receivables, Gross Contractual Amount		$ 201.1
Scenario, Forecast [Member] | Rowan Companies [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 928.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	199.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	200
Business Combination, Acquired Receivable, Fair Value	454.5
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	152.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	2,755.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	184.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	252.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt	181.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	1,910.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	372
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	2,158.3
Business Combination, Consideration Transferred	1,404.6
Business Combination, Bargain Purchase, Gain Recognized, Amount	$ 753.7

Rowan Transaction Pro Forma Imp

Rowan Transaction Pro Forma Impact of the Rowan Transaction (Details) - Rowan Companies [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs	$ 9.4
Business Acquisition, Pro Forma Revenue	580.4	$ 628.2
Business Acquisition, Pro Forma Net Income (Loss)	$ (271.6)	$ (191.4)
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ (1.38)	$ (0.97)

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Supplemental executive retirement plan assets	$ 29.3	$ 27.2
Derivative Assets (Liabilities), at Fair Value, Net	(6.9)	(10.7)
Total Financial Liabilities	(6.9)	(10.7)
Total financial assets	29.3	27.2
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	29.3	27.2
Total financial assets	29.3	27.2
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
Derivative Assets (Liabilities), at Fair Value, Net	(6.9)	(10.7)
Total Financial Liabilities	(6.9)	(10.7)
Total financial assets	0	0
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
Total financial assets	$ 0	$ 0

Fair Value Measurements (Sche_2

Fair Value Measurements (Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 5,018.5	$ 5,010.4
Estimated Fair Value	$ 4,042.9	$ 3,545.8
6.875% senior notes due 2020
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	$ 126.9	$ 127.5
Estimated Fair Value	$ 122.8	$ 121.6
4.70% senior notes due 2021
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	$ 112.9	$ 112.7
Estimated Fair Value	$ 108.5	$ 101.8
3.00% exchangeable senior notes due 2024(1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.00%	3.00%
3.00% exchangeable senior notes due 2024(1) | 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	$ 836.9
Carrying Value	674.7	$ 666.8
Estimated Fair Value	$ 655.5	$ 575.5
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	$ 620	$ 619.8
Estimated Fair Value	$ 476	$ 405.2
8.00% senior notes due 2024 [Member]
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	$ 336.7	$ 337
Estimated Fair Value	$ 305.1	$ 273.7
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	$ 664.6	$ 664.4
Estimated Fair Value	$ 517.7	$ 443.9
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	$ 985.6	$ 985
Estimated Fair Value	$ 849.8	$ 725.5
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	$ 149.4	$ 149.3
Estimated Fair Value	$ 121.1	$ 109.1
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	$ 374.6	$ 375
Estimated Fair Value	$ 238.2	$ 223.2
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	$ 973.1	$ 972.9
Estimated Fair Value	$ 648.2	$ 566.3

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	$ (6.9)		$ (10.7)
Maturity period of derivatives (in months)	18 months
Estimated amount of net gains associated with derivative instruments, net of tax	$ (3)
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(3.1)	$ 1.8
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	169.6
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	191.8
United Kingdom, Pounds | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	88.3
United Kingdom, Pounds | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	13.2
Indonesia, Rupiahs | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	10.1
Australia, Dollars | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	39.8
Australia, Dollars | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	31.7
Euro Member Countries, Euro | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	21.5
Euro Member Countries, Euro | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	84.3
No currency | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	7.1
No currency | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	34
Fair Value, Inputs, Level 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	$ (6.9)		$ (10.7)

Derivative Instruments (Schedul

Derivative Instruments (Schedule Of Derivatives At Fair Value) (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Total fair value of derivative assets		$ 0.5	$ 0.6
Total fair value of derivative liabilities		7.4	11.3
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Total fair value of derivative assets		0.3	0.2
Total fair value of derivative liabilities		5.3	8.7
Other Current Assets [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Total fair value of derivative assets	[1]	0.2	0.2
Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Total fair value of derivative assets	[1]	0.2	0.4
Other Current Liabilities [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Total fair value of derivative liabilities	[1]	5.1	8.3
Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Total fair value of derivative liabilities	[1]	2.1	2.6
Other Noncurrent Assets [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Total fair value of derivative assets	[1]	0.1	0
Other Noncurrent Liabilities [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Total fair value of derivative liabilities	[1]	$ 0.2	$ 0.4
[1]	Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets.

Derivative Instruments (Gains A

Derivative Instruments (Gains And Losses On Derivatives Designated As Cash Flow Hedges) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Interest Rate Lock Contracts [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)	[1]	$ 0	$ 0
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	[1],[2]	0.1	0.1
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	[1],[3]	0	0
Foreign Exchange Forward [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)	[4]	0	1.9
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	[2],[4]	1.5	(2.3)
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	[3],[4]	0	(0.2)
Foreign Exchange Forward [Member] | Contract Drilling [Member]
Derivative [Line Items]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)		(1.7)	2.1
Foreign Exchange Forward [Member] | Depreciation Expense [Member]
Derivative [Line Items]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)		0.2	0.2
Cash Flow Hedges [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)		0	1.9
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	[2]	1.6	(2.2)
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	[3]	0	$ (0.2)
Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative, Notional Amount		191.8
Not Designated as Hedging Instrument [Member] | Qatar, Rials | Fair Value Hedging [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative, Notional Amount		18.5
Not Designated as Hedging Instrument [Member] | Indonesia, Rupiahs | Fair Value Hedging [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 10.1
[1]	Losses on interest rate lock derivatives reclassified from AOCI into income (effective portion) were included in interest expense, net, in our condensed consolidated statements of operations.
[2]	Changes in the fair value of cash flow hedges are recorded in AOCI. Amounts recorded in AOCI associated with cash flow hedges are subsequently reclassified into contract drilling, depreciation or interest expense as earnings are affected by the underlying hedged forecasted transaction.
[3]	Gains and losses recognized in income for ineffectiveness and amounts excluded from effectiveness testing were included in other, net, in our condensed consolidated statements of operations.
[4]	During the first quarter of 2019, $1.7 million of losses were reclassified from AOCI into contract drilling expense and $0.2 million of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations. During the prior year quarter, $2.1 million of gains were reclassified from AOCI into contract drilling expense and $0.2 million of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of operations.

Earnings Per Share (Reconciliat

Earnings Per Share (Reconciliation Of Net Income Attributable To Ensco Shares) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations Attributable to Parent	$ (190.4)	$ (140)
Net income allocated to non-vested share awards	(0.1)	(0.1)
Income (Loss) from Continuing Operations Attributable to Parent, Available to Common Stockholders	$ (190.5)	$ (140.1)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.2	0.4

Shareholders's Equity (Schedule

Shareholders's Equity (Schedule of Activity) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2018
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 8,088.8
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(188)	$ (140.5)
Other Comprehensive Income (Loss), Net of Tax	1.5	$ (0.4)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 7,900.3
Common Stock, Dividends, Per Share, Cash Paid	$ 0.04	$ 0.04
Common Stock [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Shares, Issued	115.2	111.8
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 46.2	$ 44.8
Shares, Issued	115.2	111.8
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 46.2	$ 44.8
Additional Paid-in Capital [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 7,225	$ 7,195
Shares Issued Under Share Based Compensation Plans, Shares	(0.1)	(0.1)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	$ 5.3	$ 7.5
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	7,230.2	7,202.4
Retained Earnings [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	874.2	1,532.7
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(190.4)	(140.1)
Dividends, Common Stock, Cash	(4.5)	(4.4)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	679.3	1,387.4
Retained Earnings [Member] | Accounting Standards Update 2018-02 [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			$ (0.8)
AOCI Attributable to Parent [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	18.2	28.6
Other Comprehensive Income (Loss), Net of Tax	1.5
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	19.7	29
AOCI Attributable to Parent [Member] | Accounting Standards Update 2018-02 [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			$ 0.8
Treasury Stock [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (72.2)	$ (69)
Shares Issued Under Share Based Compensation Plans, Shares	0.1	0.1
Stock Repurchased During Period, Value	$ (2.8)	$ (1.1)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(74.9)	(70)
Noncontrolling Interest [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(2.6)	(2.1)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	2.4	(0.4)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (0.2)	$ (2.5)

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Discrete Income Tax Expense (Benefit)	$ (0.6)	$ 8.9

Contingencies (Narrative) (Deta

Contingencies (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended
	Aug. 31, 2018	Jan. 31, 2018	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Damages Sought, Value	$ 2.8	$ 10
Letters of Credit Outstanding, Amount			$ 128

Leases (Details)

Leases (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Cash paid for amounts included in operating lease liabilities	$ 7
Minimum [Member]
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Remaining lease terms	11 years

Leases Components of Lease Expe

Leases Components of Lease Expense (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Long-term operating lease cost	$ 6.2
Short-term operating lease cost	3.1
Sublease income	(0.4)
Total operating lease cost	$ 8.9

Leases Supplemental Balance She

Leases Supplemental Balance Sheet Information Related to Operating Leases (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets	$ 47.9	$ 53.7	$ 0
Current lease liability	17.9		0
Long-term lease liability	41.1		$ 0
Total operating lease liabilities	$ 59	$ 64.6
Weighted-average remaining lease term (in years)	5 years 2 months 12 days
Weighted-average discount rate	8.71%

Leases Maturities of Lease Liab

Leases Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
2019 (excluding the three months ended March 31, 2019)	$ 18.2
2020	15
2021	9.3
2022	8.5
2023	8.8
Thereafter	15.3
Total lease payments	75.1
Less imputed interest	(16.1)
Total	$ 59	$ 64.6

Segment Information (Narrative)

Segment Information (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019segmentscontract
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 (in contracts) | contract	2

Segment Information (Schedule O

Segment Information (Schedule Of Segment Reporting Information) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 405,900,000	$ 417,000,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	332,600,000	325,200,000
Cost, Depreciation	125,000,000	115,200,000
General and administrative	29,600,000	27,900,000
OPERATING LOSS	(81,300,000)	(51,300,000)
Property and equipment, net	12,508,900,000	12,834,800,000	$ 12,616,200,000
Floaters [Member]
Segment Reporting Information [Line Items]
Revenues	232,700,000	259,000,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	181,800,000	185,100,000
Cost, Depreciation	84,800,000	75,300,000
General and administrative	0	0
OPERATING LOSS	(33,900,000)	(1,400,000)
Property and equipment, net	9,383,600,000	9,636,900,000
Jackups Member
Segment Reporting Information [Line Items]
Revenues	157,000,000	143,400,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	135,400,000	126,900,000
Cost, Depreciation	36,900,000	36,500,000
General and administrative	0	0
OPERATING LOSS	(15,300,000)	(20,000,000)
Property and equipment, net	3,091,700,000	3,154,300,000
Other [Member]
Segment Reporting Information [Line Items]
Revenues	16,200,000	14,600,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	15,400,000	13,200,000
Cost, Depreciation	0	0
General and administrative	0	0
OPERATING LOSS	800,000	1,400,000
Property and equipment, net	0	0
Operating Segments Total [Member]
Segment Reporting Information [Line Items]
Revenues	405,900,000	417,000,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	332,600,000	325,200,000
Cost, Depreciation	121,700,000	111,800,000
General and administrative	0	0
OPERATING LOSS	(48,400,000)	(20,000,000)
Property and equipment, net	12,475,300,000	12,791,200,000
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	0	0
Cost, Depreciation	3,300,000	3,400,000
General and administrative	29,600,000	27,900,000
OPERATING LOSS	(32,900,000)	(31,300,000)
Property and equipment, net	$ 33,600,000	$ 43,600,000

Segment Information (Schedule_2

Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)	Mar. 31, 2019rigs
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	59	[1]
Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	24
Jackups Member
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	35
North South America Incl Brazil [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	12	[1]
North South America Incl Brazil [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	8
North South America Incl Brazil [Member] | Jackups Member
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	4
Europe & Mediterranean [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	17	[1]
Europe & Mediterranean [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	6
Europe & Mediterranean [Member] | Jackups Member
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	11
Middle East [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	15	[1]
Middle East [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	4
Middle East [Member] | Jackups Member
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	11
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	11	[1]
Asia Pacific [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	4
Asia Pacific [Member] | Jackups Member
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	7
Asia & Pacific Rim (under construction) [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	3	[1]
Asia & Pacific Rim (under construction) [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	2
Asia & Pacific Rim (under construction) [Member] | Jackups Member
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	1
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	1	[1]
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	0
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Jackups Member
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	1
[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 Inform_3

Supplemental Financial Information (Accounts Receivable, Net) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	$ 317	$ 348.1
Allowance for doubtful accounts	(3.3)	(3.4)
Accounts receivable, net	313.7	344.7
Trade [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	274.8	301.7
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	$ 42.2	$ 46.4

Supplemental Financial Inform_4

Supplemental Financial Information (Other Current Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Supplemental Financial Information [Abstract]
Materials and supplies	$ 263.8	$ 268.1
Prepaid taxes	35	35
Deferred costs	28.2	23.5
Prepaid expenses	9.7	15.2
Other	18.1	19.1
Other current assets	$ 354.8	$ 360.9

Supplemental Financial Inform_5

Supplemental Financial Information (Other Assets, Net) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Supplemental Financial Information [Abstract]
Operating Lease, Right-of-Use Asset	$ 47.9	$ 53.7	$ 0
Supplemental executive retirement plan assets	29.3		27.2
Deferred tax assets	27.8		29.4
Deferred costs	19.1		21.5
Other	18.1		19.7
Other Assets, Net	$ 142.2		$ 97.8

Supplemental Financial Inform_6

Supplemental Financial Information (Accrued Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Supplemental Financial Information [Abstract]
Interest	$ 78	$ 100.6
Personnel costs	61.9	82.5
Deferred revenue	55.9	56.9
Taxes	50.3	36.9
Operating Lease, Liability, Current	17.9	0
Other Accrued Liabilities, Current	15.9	14.3
Derivative Liability	7.2	10.9
Other	15.6	15.9
Accrued liabilities and other	$ 302.7	$ 318

Supplemental Financial Inform_7

Supplemental Financial Information (Other Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Supplemental Financial Information [Abstract]
Unrecognized tax benefits (inclusive of interest and penalties)	$ 173.1	$ 177
Deferred Tax Liabilities, Net, Noncurrent	75.5	70.7
Intangible Liabilities Noncurrent	52.7	53.5
Operating Lease, Liability, Noncurrent	41.1	0
Supplemental executive retirement plan liabilities	30.3	28.1
Personnel costs	27.8	25.1
Deferred revenue	17.8	20.5
Deferred Rent Credit, Noncurrent	0	11.7
Other	9	9.4
Other liabilities	$ 427.3	$ 396

Supplemental Financial Inform_8

Supplemental Financial Information (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Supplemental Financial Information [Abstract]
Derivative Instruments	$ 14.2	$ 12.6
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	7.3	7.3
Other	(1.8)	(1.7)
Accumulated other comprehensive income	$ 19.7	$ 18.2

Supplemental Financial Inform_9

Supplemental Financial Information Schedule of Revenues by Major Customer (Details) - Sales Revenue, Services, Net [Member] - Customer Concentration Risk [Member]	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	100.00%	100.00%
TOTAL [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	18.00%	14.00%
Saudi Aramco [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	13.00%	10.00%
BP [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	5.00%	12.00%
BP [Member] | Floaters [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage		61.00%
BP [Member] | Jackups Member
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	27.00%
BP [Member] | Other Rigs [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	73.00%	10.00%
Petrobras [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	5.00%	12.00%
Other Customers [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	59.00%	52.00%

Supplemental Financial Infor_10

Supplemental Financial Information Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 405.9	$ 417
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	405.9	417
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | ANGOLA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	70.6	61.1
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | AUSTRALIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	67.3	52.2
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | US Gulf Of Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	54.7	53.6
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | SAUDI ARABIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	53.4	43.2
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	22	50.3
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	43.4	46.6
Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Other Geographic Areas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	94.5	110
Floaters [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 232.7	$ 259
Floaters [Member] | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | ANGOLA
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage	86.00%	98.00%
Floaters [Member] | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | AUSTRALIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage	94.00%	100.00%
Floaters [Member] | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | US Gulf Of Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage	25.00%	38.00%
Jackups Member
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 157	$ 143.4
Jackups Member | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | US Gulf Of Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage	45.00%	34.00%

Guarantee Of Registered Secur_3

Guarantee Of Registered Securities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Guarantor Obligations [Line Items]
Senior notes aggregate outstanding principal balance	$ 400
6.875% senior notes due 2020
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.875%	6.875%
Debt Instrument, Maturity Date	2020
7.875% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.875%	7.875%
Debt Instrument, Maturity Date	2040
7.20% Debentures due 2027
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.20%	7.20%
Debt Instrument, Maturity Date	2027
Senior notes aggregate outstanding principal balance	$ 150
Pride International Inc and Ensco International Inc [Member]
Guarantor Obligations [Line Items]
Subsidiary, Ownership Percentage by Parent	100.00%

Guarantee Of Registered Secur_4

Guarantee Of Registered Securities (Condensed Consolidating Statements Of Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Guarantor Obligations [Line Items]
Revenues	$ 405.9	$ 417
Contract drilling (exclusive of depreciation)	332.6	325.2
Cost, Depreciation	125	115.2
General and administrative	29.6	27.9
OPERATING LOSS	(81.3)	(51.3)
OTHER INCOME (EXPENSE), NET	(75.2)	(70.7)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(156.5)	(122)
INCOME TAX PROVISION	31.5	18.4
DISCONTINUED OPERATIONS, NET	0	(0.1)
EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX	0	0
NET LOSS	(188)	(140.5)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.4)	0.4
NET LOSS ATTRIBUTABLE TO ENSCOROWAN	(190.4)	(140.1)
Ensco Plc [Member]
Guarantor Obligations [Line Items]
Revenues	11.4	12.3
Contract drilling (exclusive of depreciation)	11.7	13.4
Cost, Depreciation	0	0
General and administrative	14.9	10.2
OPERATING LOSS	(15.2)	(11.3)
OTHER INCOME (EXPENSE), NET	(16.1)	5.6
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(31.3)	(5.7)
INCOME TAX PROVISION	0	0
DISCONTINUED OPERATIONS, NET		0
EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX	(159.1)	(134.4)
NET LOSS	(190.4)	(140.1)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0
NET LOSS ATTRIBUTABLE TO ENSCOROWAN	(190.4)	(140.1)
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
Revenues	39.5	40.3
Contract drilling (exclusive of depreciation)	35.7	36.6
Cost, Depreciation	3.7	3.5
General and administrative	0.1	0.2
OPERATING LOSS	0	0
OTHER INCOME (EXPENSE), NET	(15.4)	(28)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(15.4)	(28)
INCOME TAX PROVISION	16.6	4.3
DISCONTINUED OPERATIONS, NET		0
EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX	32.1	20.8
NET LOSS	0.1	(11.5)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0
NET LOSS ATTRIBUTABLE TO ENSCOROWAN	0.1	(11.5)
Pride International, Inc. [Member]
Guarantor Obligations [Line Items]
Revenues	0	0
Contract drilling (exclusive of depreciation)	0	0
Cost, Depreciation	0	0
General and administrative	0	0
OPERATING LOSS	0	0
OTHER INCOME (EXPENSE), NET	(20.5)	(30.3)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(20.5)	(30.3)
INCOME TAX PROVISION	0	0
DISCONTINUED OPERATIONS, NET		0
EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX	26.1	23.4
NET LOSS	5.6	(6.9)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0
NET LOSS ATTRIBUTABLE TO ENSCOROWAN	5.6	(6.9)
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
Revenues	430.4	443.5
Contract drilling (exclusive of depreciation)	360.6	354.3
Cost, Depreciation	121.3	111.7
General and administrative	14.6	17.5
OPERATING LOSS	(66.1)	(40)
OTHER INCOME (EXPENSE), NET	(27.3)	(33.4)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(93.4)	(73.4)
INCOME TAX PROVISION	14.9	14.1
DISCONTINUED OPERATIONS, NET		(0.1)
EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX	0	0
NET LOSS	(108.3)	(87.6)
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.4)	0.4
NET LOSS ATTRIBUTABLE TO ENSCOROWAN	(110.7)	(87.2)
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
Revenues	(75.4)	(79.1)
Contract drilling (exclusive of depreciation)	(75.4)	(79.1)
Cost, Depreciation	0	0
General and administrative	0	0
OPERATING LOSS	0	0
OTHER INCOME (EXPENSE), NET	4.1	15.4
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	4.1	15.4
INCOME TAX PROVISION	0	0
DISCONTINUED OPERATIONS, NET		0
EQUITY IN EARNINGS (LOSSES) OF AFFILIATES, NET OF TAX	100.9	90.2
NET LOSS	105	105.6
NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0
NET LOSS ATTRIBUTABLE TO ENSCOROWAN	$ 105	$ 105.6

Guarantee Of Registered Secur_5

Guarantee Of Registered Securities Guarantee Of Registered Securities (Condensed Consolidating Statements of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
NET LOSS	$ (188)	$ (140.5)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	0	1.9
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	1.6	(2.2)
Other	(0.1)	(0.1)
NET OTHER COMPREHENSIVE INCOME	1.5	(0.4)
COMPREHENSIVE LOSS	(186.5)	(140.9)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.4)	0.4
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	(188.9)	(140.5)
Ensco Plc [Member]
NET LOSS	(190.4)	(140.1)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives		0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0	0
Other	0	0
NET OTHER COMPREHENSIVE INCOME	0	0
COMPREHENSIVE LOSS	(190.4)	(140.1)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	(190.4)	(140.1)
ENSCO International Inc. [Member]
NET LOSS	0.1	(11.5)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives		1.9
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	1.6	(2.2)
Other	0	0
NET OTHER COMPREHENSIVE INCOME	1.6	(0.3)
COMPREHENSIVE LOSS	1.7	(11.8)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	1.7	(11.8)
Pride International, Inc. [Member]
NET LOSS	5.6	(6.9)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives		0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0	0
Other	0	0
NET OTHER COMPREHENSIVE INCOME	0	0
COMPREHENSIVE LOSS	5.6	(6.9)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	5.6	(6.9)
Other Non-Guarantor Subsidiaries Of Ensco [Member]
NET LOSS	(108.3)	(87.6)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives		0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0	0
Other	(0.1)	(0.1)
NET OTHER COMPREHENSIVE INCOME	(0.1)	(0.1)
COMPREHENSIVE LOSS	(108.4)	(87.7)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.4)	0.4
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	(110.8)	(87.3)
Consolidating Adjustments [Member]
NET LOSS	105	105.6
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives		0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0	0
Other	0	0
NET OTHER COMPREHENSIVE INCOME	0	0
COMPREHENSIVE LOSS	105	105.6
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0
COMPREHENSIVE LOSS ATTRIBUTABLE TO ENSCO	$ 105	$ 105.6

Guarantee Of Registered Secur_6

Guarantee Of Registered Securities (Condensed Consolidating Balance Sheets) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Guarantor Obligations [Line Items]
Cash and cash equivalents	$ 298.4	$ 275.1	$ 465.4	$ 445.4
Short-term Investments	245	329
Accounts receivable, net	313.7	344.7
Accounts receivable from affiliates	0	0
Other	354.8	360.9
Total current assets	1,211.9	1,309.7
PROPERTY AND EQUIPMENT, AT COST	15,368.6	15,517
Less accumulated depreciation	2,859.7	2,900.8
Property and equipment, net	12,508.9	12,616.2	12,834.8
DUE FROM AFFILIATES	0	0
INVESTMENTS IN AFFILIATES	0	0
OTHER ASSETS, NET	142.2	97.8
TOTAL ASSETS	13,863	14,023.7
Accounts payable and accrued liabilities	516.9	528.5
Accounts payable to affiliates	0	0
Total current liabilities	516.9	528.5
Due to Affiliate, Noncurrent	0	0
LONG-TERM DEBT	5,018.5	5,010.4
OTHER LIABILITIES	427.3	396
ENSCO SHAREHOLDERS' EQUITY	7,900.5	8,091.4
NONCONTROLLING INTERESTS	(0.2)	(2.6)
Total equity	7,900.3	8,088.8
Total liabilities and shareholders' equity	13,863	14,023.7
Ensco Plc [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	245.9	199.8	321.8	185.2
Short-term Investments	245	329
Accounts receivable, net	4.1	7.3
Accounts receivable from affiliates	1,822.9	1,861.2
Other	0.4	0.6
Total current assets	2,318.3	2,397.9
PROPERTY AND EQUIPMENT, AT COST	1.8	1.8
Less accumulated depreciation	1.8	1.8
Property and equipment, net	0	0
DUE FROM AFFILIATES	2,412.6	2,413.8
INVESTMENTS IN AFFILIATES	8,372.7	8,522.6
OTHER ASSETS, NET	8.8	8.1
TOTAL ASSETS	13,112.4	13,342.4
Accounts payable and accrued liabilities	64.8	85.3
Accounts payable to affiliates	29.2	59.7
Total current liabilities	94	145
Due to Affiliate, Noncurrent	1,439.3	1,432
LONG-TERM DEBT	3,678.4	3,676.5
OTHER LIABILITIES	0.4	0.1
ENSCO SHAREHOLDERS' EQUITY	7,900.3	8,088.8
NONCONTROLLING INTERESTS	0	0
Total equity	7,900.3	8,088.8
Total liabilities and shareholders' equity	13,112.4	13,342.4
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	0	0	0	0
Short-term Investments	0	0
Accounts receivable, net	25.4	25.4
Accounts receivable from affiliates	78.2	171.4
Other	3.5	6
Total current assets	107.1	202.8
PROPERTY AND EQUIPMENT, AT COST	101.4	125.2
Less accumulated depreciation	71.1	91.3
Property and equipment, net	30.3	33.9
DUE FROM AFFILIATES	0	234.5
INVESTMENTS IN AFFILIATES	3,745.8	3,713.7
OTHER ASSETS, NET	0	0
TOTAL ASSETS	3,883.2	4,184.9
Accounts payable and accrued liabilities	34	32
Accounts payable to affiliates	55.4	139.5
Total current liabilities	89.4	171.5
Due to Affiliate, Noncurrent	994.5	1,226.9
LONG-TERM DEBT	149.4	149.3
OTHER LIABILITIES	67.2	64.3
ENSCO SHAREHOLDERS' EQUITY	2,582.7	2,572.9
NONCONTROLLING INTERESTS	0	0
Total equity	2,582.7	2,572.9
Total liabilities and shareholders' equity	3,883.2	4,184.9
Pride International, Inc. [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	2.3	2.7	14.5	25.6
Short-term Investments	0	0
Accounts receivable, net	0	0
Accounts receivable from affiliates	0.7	0
Other	0	0
Total current assets	3	2.7
PROPERTY AND EQUIPMENT, AT COST	0	0
Less accumulated depreciation	0	0
Property and equipment, net	0	0
DUE FROM AFFILIATES	61.1	125
INVESTMENTS IN AFFILIATES	1,226	1,199.9
OTHER ASSETS, NET	0	0
TOTAL ASSETS	1,290.1	1,327.6
Accounts payable and accrued liabilities	4.6	12.7
Accounts payable to affiliates	8.6	38.2
Total current liabilities	13.2	50.9
Due to Affiliate, Noncurrent	1,362.2	1,366.5
LONG-TERM DEBT	501.5	502.6
OTHER LIABILITIES	0	0
ENSCO SHAREHOLDERS' EQUITY	(586.8)	(592.4)
NONCONTROLLING INTERESTS	0	0
Total equity	(586.8)	(592.4)
Total liabilities and shareholders' equity	1,290.1	1,327.6
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	50.2	72.6	129.1	234.6
Short-term Investments	0	0
Accounts receivable, net	284.2	312
Accounts receivable from affiliates	54.2	131.7
Other	350.9	354.3
Total current assets	739.5	870.6
PROPERTY AND EQUIPMENT, AT COST	15,265.4	15,390
Less accumulated depreciation	2,786.8	2,807.7
Property and equipment, net	12,478.6	12,582.3
DUE FROM AFFILIATES	2,485.7	2,715.1
INVESTMENTS IN AFFILIATES	0	0
OTHER ASSETS, NET	133.4	89.7
TOTAL ASSETS	15,837.2	16,257.7
Accounts payable and accrued liabilities	413.5	398.5
Accounts payable to affiliates	1,862.8	1,926.9
Total current liabilities	2,276.3	2,325.4
Due to Affiliate, Noncurrent	1,163.4	1,463
LONG-TERM DEBT	689.2	682
OTHER LIABILITIES	359.7	331.6
ENSCO SHAREHOLDERS' EQUITY	11,348.8	11,458.3
NONCONTROLLING INTERESTS	(0.2)	(2.6)
Total equity	11,348.6	11,455.7
Total liabilities and shareholders' equity	15,837.2	16,257.7
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	0	0	$ 0	$ 0
Short-term Investments	0	0
Accounts receivable, net	0	0
Accounts receivable from affiliates	(1,956)	(2,164.3)
Other	0	0
Total current assets	(1,956)	(2,164.3)
PROPERTY AND EQUIPMENT, AT COST	0	0
Less accumulated depreciation	0	0
Property and equipment, net	0	0
DUE FROM AFFILIATES	(4,959.4)	(5,488.4)
INVESTMENTS IN AFFILIATES	(13,344.5)	(13,436.2)
OTHER ASSETS, NET	0	0
TOTAL ASSETS	(20,259.9)	(21,088.9)
Accounts payable and accrued liabilities	0	0
Accounts payable to affiliates	(1,956)	(2,164.3)
Total current liabilities	(1,956)	(2,164.3)
Due to Affiliate, Noncurrent	(4,959.4)	(5,488.4)
LONG-TERM DEBT	0	0
OTHER LIABILITIES	0	0
ENSCO SHAREHOLDERS' EQUITY	(13,344.5)	(13,436.2)
NONCONTROLLING INTERESTS	0	0
Total equity	(13,344.5)	(13,436.2)
Total liabilities and shareholders' equity	$ (20,259.9)	$ (21,088.9)

Guarantee Of Registered Secur_7

Guarantee Of Registered Securities (Condensed Consolidating Statements Of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	$ (24.4)	$ 39.5
Maturities of short-term investments	204	390
INVESTING ACTIVITIES
Purchases of short-term investments	(120)	(349)
Additions to property and equipment	(29)	(269.3)
Purchase of Affiliate Debt		0
Other	0.3	0.1
Net cash provided by (used in) investing activities	55.3	(228.2)
FINANCING ACTIVITIES
Proceeds from Issuance of senior notes	0	1,000
Reduction of long-term borrowings	0	(771)
Debt financing costs	0	(16.8)
Cash dividends paid	(4.5)	(4.5)
Payments for Advance to Affiliate	0
Proceeds from Contributions from Affiliates		0
Other	(2.8)	(1.2)
Net cash (used in) provided by financing activities	(7.3)	206.5
Net cash provided by discontinued operations	0	2.5
Effect of exchange rate changes on cash and cash equivalents	(0.3)	(0.3)
INCREASE IN CASH AND CASH EQUIVALENTS	23.3	20
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	275.1	445.4
CASH AND CASH EQUIVALENTS, END OF PERIOD	298.4	465.4
Ensco Plc [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(45.9)	18
Maturities of short-term investments	204	390
INVESTING ACTIVITIES
Purchases of short-term investments	(120)	(349)
Additions to property and equipment	0	0
Purchase of Affiliate Debt		(552.5)
Sale of Affiliate Debt		479
Other	0	0
Net cash provided by (used in) investing activities	84	(32.5)
FINANCING ACTIVITIES
Proceeds from Issuance of senior notes		1,000
Reduction of long-term borrowings		(159.7)
Debt financing costs		(16.8)
Cash dividends paid	(4.5)	(4.5)
Payments for Advance to Affiliate		(666.7)
Proceeds from Contributions from Affiliates	15.3
Other	(2.8)	(1.2)
Net cash (used in) provided by financing activities	8	151.1
Net cash provided by discontinued operations		0
Effect of exchange rate changes on cash and cash equivalents	0	0
INCREASE IN CASH AND CASH EQUIVALENTS	46.1	136.6
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	199.8	185.2
CASH AND CASH EQUIVALENTS, END OF PERIOD	245.9	321.8
ENSCO International Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(43)	(36.9)
Maturities of short-term investments	0	0
INVESTING ACTIVITIES
Purchases of short-term investments	0	0
Additions to property and equipment	0	0
Purchase of Affiliate Debt		0
Other	0	0
Net cash provided by (used in) investing activities	0	0
FINANCING ACTIVITIES
Proceeds from Issuance of senior notes		0
Reduction of long-term borrowings		0
Debt financing costs		0
Cash dividends paid	0	0
Proceeds from Contributions from Affiliates	43	36.9
Other	0	0
Net cash (used in) provided by financing activities	43	36.9
Net cash provided by discontinued operations		0
Effect of exchange rate changes on cash and cash equivalents	0	0
INCREASE IN CASH AND CASH EQUIVALENTS	0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	0	0
Pride International, Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	(55.2)	(45)
Maturities of short-term investments	0	0
INVESTING ACTIVITIES
Purchases of short-term investments	0	0
Additions to property and equipment	0	0
Purchase of Affiliate Debt		0
Other	0	0
Net cash provided by (used in) investing activities	0	0
FINANCING ACTIVITIES
Proceeds from Issuance of senior notes		0
Reduction of long-term borrowings		(537.8)
Debt financing costs		0
Cash dividends paid	0	0
Proceeds from Contributions from Affiliates	54.8	571.7
Other	0	0
Net cash (used in) provided by financing activities	54.8	33.9
Net cash provided by discontinued operations		0
Effect of exchange rate changes on cash and cash equivalents	0	0
INCREASE IN CASH AND CASH EQUIVALENTS	(0.4)	(11.1)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	2.7	25.6
CASH AND CASH EQUIVALENTS, END OF PERIOD	2.3	14.5
Other Non-Guarantor Subsidiaries Of Ensco [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	119.7	103.4
Maturities of short-term investments	0
INVESTING ACTIVITIES
Purchases of short-term investments	0	0
Additions to property and equipment	(29)	(269.3)
Purchase of Affiliate Debt		0
Other	0.3	0.1
Net cash provided by (used in) investing activities	(28.7)	(269.2)
FINANCING ACTIVITIES
Proceeds from Issuance of senior notes		0
Reduction of long-term borrowings		0
Debt financing costs		0
Cash dividends paid	0	0
Payments for Advance to Affiliate	(113.1)
Proceeds from Contributions from Affiliates		58.1
Other	0	0
Net cash (used in) provided by financing activities	(113.1)	58.1
Net cash provided by discontinued operations		2.5
Effect of exchange rate changes on cash and cash equivalents	(0.3)	(0.3)
INCREASE IN CASH AND CASH EQUIVALENTS	(22.4)	(105.5)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	72.6	234.6
CASH AND CASH EQUIVALENTS, END OF PERIOD	50.2	129.1
Consolidating Adjustments [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	0	0
Maturities of short-term investments	0	0
INVESTING ACTIVITIES
Purchases of short-term investments	0	0
Additions to property and equipment	0	0
Purchase of Affiliate Debt		552.5
Sale of Affiliate Debt		(479)
Other	0	0
Net cash provided by (used in) investing activities	0	73.5
FINANCING ACTIVITIES
Proceeds from Issuance of senior notes		0
Reduction of long-term borrowings		(73.5)
Debt financing costs		0
Cash dividends paid	0	0
Proceeds from Contributions from Affiliates	0	0
Other	0	0
Net cash (used in) provided by financing activities	0	(73.5)
Net cash provided by discontinued operations		0
Effect of exchange rate changes on cash and cash equivalents	0	0
INCREASE IN CASH AND CASH EQUIVALENTS	0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 0	$ 0

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	Apr. 11, 2019	Mar. 31, 2019	Oct. 31, 2017
Subsequent Event [Line Items]
Common Stock, Par or Stated Value Per Share		$ 0.10
Subsequent Event [Member]
Subsequent Event [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.40
Credit Facility due 2019 [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Current Borrowing Capacity			$ 2,000,000,000
Credit Facility due 2019 [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 2,300,000,000
Credit Facility due 2020 [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Current Borrowing Capacity			1,300,000,000
Credit Facility due 2022 [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Current Borrowing Capacity			$ 1,200,000,000
Credit Facility due 2022 [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Current Borrowing Capacity	1,700,000,000
Revolving Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 250,000,000