Valaris Limited (VAL) 10-Q 24 Oct 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 18, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	30-Sep-13
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Entity Registrant Name	Ensco plc
Entity Central Index Key	314808
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Shares, Shares Outstanding		233,539,717

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
OPERATING REVENUES	$1,266.20	$1,123.50	$3,664.20	$3,215.20
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	619.2	507.3	1,786.80	1,503.50
Depreciation	153.3	142.4	455.2	414.7
General and administrative	37.4	40.2	111.6	113.9
Total operating expenses	809.9	689.9	2,353.60	2,032.10
OPERATING (LOSS) INCOME	456.3	433.6	1,310.60	1,183.10
OTHER INCOME (EXPENSE)
Interest income	4.3	5.5	12.3	17.2
Interest expense, net	-40.2	-30.8	-123.6	-95.4
Other, net	34.3	-0.2	40.1	1.3
Other income (expense), net	-1.6	-25.5	-71.2	-76.9
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	454.7	408.1	1,239.40	1,106.20
PROVISION FOR INCOME TAXES
Current income tax expense	82.8	44.1	199.4	113.3
Deferred income tax (benefit) expense	-9.5	2.8	-24.8	14
Total provision for income taxes	73.3	46.9	174.6	127.3
INCOME FROM CONTINUING OPERATIONS	381.4	361.2	1,064.80	978.9
DISCONTINUED OPERATIONS
(Loss) gain on disposal of discontinued operations, net	0	-10.3	-1.1	2.5
DISCONTINUED OPERATIONS, NET	0	-15.8	-0.9	-23.4
NET INCOME	381.4	345.4	1,063.90	955.5
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	-2.6	-1.9	-7.1	-5.3
NET INCOME ATTRIBUTABLE TO ENSCO	378.8	343.5	1,056.80	950.2
EARNINGS PER SHARE - BASIC
Income (Loss) from Continuing Operations, Per Basic and Diluted Share	$1.62	$1.55	$4.53	$4.20
Discontinued operations (in dollars per share)	$0	($0.07)	$0	($0.10)
Earnings per share - basic (in dollar per share)	$1.62	$1.48	$4.53	$4.10
NET INCOME ATTRIBUTABLE TO ENSCO SHARES - BASIC AND DILUTED	$374.80	$339.90	$1,045.60	$940.40
WEIGHTED-AVERAGE SHARES OUTSTANDING
Basic (in shares)	231.1	229.6	230.8	229.2
Diluted (in shares)	231.3	229.9	231	229.5
CASH DIVIDENDS PER SHARE (in dollars per share)	$0.50	$0.38	$1.50	$1.13

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
NET INCOME	$381.40	$345.40	$1,063.90	$955.50
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	8.3	4	-5.3	10.2
Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	2.8	-0.3	2.2	-1.2
Other			0.5	-1.5
NET OTHER COMPREHENSIVE (LOSS) INCOME	11.1	3.7	-2.6	7.5
COMPREHENSIVE INCOME	392.5	349.1	1,061.30	963
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	-2.6	-1.9	-7.1	-5.3
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$389.90	$347.20	$1,054.20	$957.70

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
CURRENT ASSETS
Cash and cash equivalents	$325.40	$487.10
Accounts receivable, net	775.5	811.4
Other	416.2	425.4
Total current assets	1,517.10	1,723.90
PROPERTY AND EQUIPMENT, AT COST	17,033.40	15,737.10
Less accumulated depreciation	3,036	2,591.50
Property and equipment, net	13,997.40	13,145.60
GOODWILL	3,274	3,274
OTHER ASSETS, NET	354.4	421.8
TOTAL ASSETS	19,142.90	18,565.30
CURRENT LIABILITIES
Accounts payable - trade	374.6	357.8
Accrued liabilities and other	518.4	584.4
Current maturities of long-term debt	47.5	47.5
Total current liabilities	940.5	989.7
LONG-TERM DEBT	4,743.60	4,798.40
DEFERRED INCOME TAXES	340.8	351.7
OTHER LIABILITIES	515.4	573.4
COMMITMENTS AND CONTINGENCIES
ENSCO SHAREHOLDERS' EQUITY
Additional paid-in capital	5,454.90	5,398.70
Retained earnings	7,141.30	6,434.70
Accumulated other comprehensive income	17.5	20.1
Treasury shares, at cost, 6.0 million shares and 5.3 million shares	-44.7	-31
Total Ensco shareholders' equity	12,593.10	11,846.40
NONCONTROLLING INTERESTS	9.5	5.7
Total equity	12,602.60	11,852.10
Total liabilities and shareholders' equity	19,142.90	18,565.30
Class A ordinary shares, U.S. [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	24	23.8
Common Class B, Par Value In GBP [Member]
ENSCO SHAREHOLDERS' EQUITY
Common shares, value	$0.10	$0.10

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012
			Class A ordinary shares, U.S. [Member]	Class A ordinary shares, U.S. [Member]	Common Class B, Par Value In GBP [Member]	Common Class B, Par Value In GBP [Member]
			USD ($)	USD ($)	GBP (£)	GBP (£)
Common stock, par value per share (in dollars per share or pounds sterling per share)			$0.10	$0.10	£ 1	£ 1
Common shares, shares authorized (in shares)			450,000,000	450,000,000	50,000	50,000
Common shares, shares issued (in shares)			239,500,000	237,700,000	50,000	50,000
Treasury shares, shares held (in shares)	6,000,000	5,300,000

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES
Net income	$1,063.90	$955.50
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0.9	23.4
Depreciation expense	455.2	414.7
Share-based compensation expense	38.1	40.9
Deferred income tax (benefit) expense	-24.8	14
Amortization of intangibles and other, net	-20.1	-21.7
Other	-3.1	2.1
Changes in operating assets and liabilities	-77.7	167.7
Net cash provided by operating activities of continuing operations	1,432.40	1,596.60
INVESTING ACTIVITIES
Additions to property and equipment	-1,282.70	-1,583.80
Maturities of short-term investments	50	4.5
Other	3.8	3.4
Net cash provided by (used in) investing activities of continuing operations	-1,228.90	-1,575.90
FINANCING ACTIVITIES
Cash dividends paid	-350.2	-260.9
Reduction of long-term borrowings	-30.9	-30.9
Proceeds from exercise of share options	22	22.1
Commercial paper borrowings, net	0	-125
Reimbursement of equity issuance cost	0	66.7
Other	-20.8	-15.4
Net cash provided by (used in) financing activities	-379.9	-343.4
DISCONTINUED OPERATIONS
Operating activities	0.2	-9.1
Investing activities	15.5	59
Net cash provided by discontinued operations	15.7	49.9
Effect of exchange rate changes on cash and cash equivalents	-1	1.9
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-161.7	-270.9
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	487.1	430.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$325.40	$159.80

Unaudited_Condensed_Consolidat

Unaudited Condensed Consolidated Financial Statements	9 Months Ended
	Sep. 30, 2013
Unaudited Condensed Consolidated Financial Statements [Abstract]
Unaudited Condensed Consolidated Financial Statements	Unaudited Condensed Consolidated Financial Statements
	We prepared the accompanying condensed consolidated financial statements of Ensco plc and subsidiaries (the "Company," "Ensco," "our," "we" or "us") in accordance with accounting principles generally accepted in the United States of America ("GAAP"), pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") included in the instructions to Form 10-Q and Article 10 of Regulation S-X. The financial information included in this report is unaudited but, in our opinion, includes all adjustments (consisting of normal recurring adjustments) that are necessary for a fair presentation of our financial position, results of operations and cash flows for the interim periods presented. The December 31, 2012 condensed consolidated balance sheet data were derived from our 2012 audited consolidated financial statements, but do not include all disclosures required by GAAP. Certain previously reported amounts have been reclassified to conform to the current year presentation. The preparation of our condensed consolidated financial statements requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, the related revenues and expenses and disclosures of gain and loss contingencies as of the date of the financial statements. Actual results could differ from those estimates.
	The financial data for the three-month and nine-month periods ended September 30, 2013 and 2012 included herein have been subjected to a limited review by KPMG LLP, our independent registered public accounting firm. The accompanying independent registered public accounting firm's review report is not a report within the meaning of Sections 7 and 11 of the Securities Act of 1933, and the independent registered public accounting firm's liability under Section 11 does not extend to it.
	Results of operations for the three-month and nine-month periods ended September 30, 2013 are not necessarily indicative of the results of operations that will be realized for the year ending December 31, 2013. 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, 2012 filed with the SEC on February 22, 2013 and our quarterly reports on Form 10-Q filed with the SEC on April 30, 2013 and July 30, 2013.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	The following fair value hierarchy table categorizes information regarding our financial assets and liabilities measured at fair value on a recurring basis (in millions):
		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Total
		(Level 1)		(Level 2)		(Level 3)
	As of September 30, 2013
	Supplemental executive retirement plan assets	$	35.9	$	—	$	—	$	35.9
	Derivatives, net	—		5.6		—		5.6
	Total financial assets	$	35.9	$	5.6	$	—	$	41.5
	As of December 31, 2012
	Supplemental executive retirement plan assets	$	29.8	$	—	$	—	$	29.8
	Derivatives, net	—		5.2		—		5.2
	Total financial assets	$	29.8	$	5.2	$	—	$	35
	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, net, on our condensed consolidated balance sheets. The fair value measurement of assets held in the SERP was based on quoted market prices.
	Derivatives
	Our derivatives were measured at fair value on a recurring basis using Level 2 inputs. See "Note 3 - Derivative Instruments" for additional information on our derivatives, including a description of our foreign currency hedging activities and related methodologies used to manage foreign currency exchange rate risk. The fair value measurement of our derivatives was based on market prices that are generally observable for similar assets or liabilities at commonly-quoted intervals.
	Other Financial Instruments
	The carrying values and estimated fair values of our long-term debt instruments were as follows (in millions):
		September 30,				December 31,
		2013				2012
		Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
	4.7% Senior notes due 2021	$	1,476.50	$	1,590.20	$	1,474.70	$	1,715.60
	6.875% Senior notes due 2020	1,028.80		1,086.80		1,040.60		1,138.30
	3.25% Senior notes due 2016	996.1		1,043.70		995.1		1,068.90
	8.5% Senior notes due 2019	604.5		634.2		616.4		661.7
	7.875% Senior notes due 2040	382.9		407.1		383.8		423.9
	7.2% Debentures due 2027	149.1		174.1		149		193.2
	4.33% MARAD bonds, including current maturities, due 2016	87.6		88.1		112.3		113
	4.65% MARAD bonds, including current maturities, due 2020	33.9		37.9		36		41.4
	6.36% MARAD bonds, including current maturities, due 2015	31.7		33.9		38		41.7
	Total	$	4,791.10	$	5,096.00	$	4,845.90	$	5,397.70
	The estimated fair values of our senior notes and debentures were determined using quoted market prices. The estimated fair values of our Maritime Administration ("MARAD") bonds were determined using an income approach valuation model. The estimated fair values of our cash and cash equivalents, short-term investments, receivables, trade payables and other liabilities approximated their carrying values as of September 30, 2013 and December 31, 2012.

Derivative_Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments
	Our functional currency is the U.S. dollar. As is customary in the oil and gas industry, a majority of our revenues are denominated in U.S. dollars; however, a portion of the revenues earned and expenses incurred by certain of our subsidiaries are denominated in currencies other than the U.S. dollar ("foreign currencies"). These transactions are remeasured in U.S. dollars based on a combination of both current and historical exchange rates. We use foreign currency forward contracts ("derivatives") to reduce our exposure to various market risks, primarily foreign currency exchange rate risk.
	All derivatives were recorded on our condensed consolidated balance sheets at fair value. 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 assets of $5.6 million and $5.2 million associated with our foreign currency derivatives were included in our condensed consolidated balance sheets as of September 30, 2013 and December 31, 2012, respectively.  All of our derivatives mature during the next 18 months.  See "Note 2 - Fair Value Measurements" for additional information on the fair value measurement of our derivatives.
	Derivatives recorded at fair value in our condensed consolidated balance sheets consisted of the following (in millions):
		Derivative Assets					Derivative Liabilities
		September 30,			December 31,		September 30,			December 31,
		2013			2012		2013			2012
	Derivatives Designated as Hedging Instruments
	Foreign currency forward contracts - current(1)	$	7		$	5	$	6.9		$	0.3
	Foreign currency forward contracts - non-current(2)	1.4			0.5		0.7			—
		8.4			5.5		7.6			0.3
	Derivatives Not Designated as Hedging Instruments
	Foreign currency forward contracts - current(1)	5.1			0.2		0.3			0.2
		5.1			0.2		0.3			0.2
	Total	$	13.5		$	5.7	$	7.9		$	0.5
	(1)	Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets.
	(2)	Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets, net, and other liabilities, respectively, on our condensed consolidated balance sheets.
	We utilize cash flow hedges to hedge forecasted foreign currency denominated transactions, primarily to reduce our exposure to foreign currency exchange rate risk associated with contract drilling expenses and capital expenditures denominated in various currencies. As of September 30, 2013, we had cash flow hedges outstanding to exchange an aggregate $373.2 million for various foreign currencies, including $158.7 million for British pounds, $125.9 million for Brazilian reais, $35.0 million for Singapore dollars, $23.0 million for Australian dollars, $21.5 million for euros and $9.1 million for other currencies.
	Gains and losses, net of tax, on derivatives designated as cash flow hedges included in our condensed consolidated statements of income and comprehensive income were as follows (in millions):
	Three Months Ended September 30, 2013 and 2012
		Gain Recognized in Other Comprehensive Income (Effective Portion)					(Loss) Gain Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)(1)					Gain Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(2)
		2013			2012		2013			2012		2013			2012
	Interest rate lock contracts(3)	$	—		$	—	$	(.1	)	$	0.2	$	—		$	—
	Foreign currency forward contracts(4)	8.3			4		(2.7		)	0.1		1.2			0.6
	Total	$	8.3		$	4	$	(2.8	)	$	0.3	$	1.2		$	0.6
	Nine Months Ended September 30, 2013 and 2012
		(Loss) Gain Recognized in Other Comprehensive Income (Effective Portion)					(Loss) Gain Reclassified from AOCI into Income (Effective Portion)(1)					(Loss) Gain Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(2)
		2013			2012		2013			2012		2013			2012
	Interest rate lock contracts(3)	$	—		$	—	$	(.3	)	$	0.4	$	—		$	—
	Foreign currency forward contracts(5)	(5.3		)	10.2		(1.9		)	0.8		(.2		)	0.8
	Total	$	(5.3	)	$	10.2	$	(2.2	)	$	1.2	$	(.2	)	$	0.8
	-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 income.
	-3	Gains and 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 income.
	(4)	During the three-month period ended September 30, 2013, $2.9 million of losses were reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of income.
	(5)	During the nine-month period ended September 30, 2013, $2.5 million of losses were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of income.
	We have net assets and liabilities denominated in numerous foreign currencies and use various methods to manage our exposure to foreign currency exchange rate risk. We predominantly structure our drilling contracts in U.S. dollars, which significantly reduces the portion of our cash flows and assets denominated in foreign currencies. We occasionally enter into derivatives that hedge the fair value of recognized foreign currency denominated assets or liabilities but do not designate such derivatives as hedging instruments. In these situations, a natural hedging relationship generally exists whereby changes in the fair value of the derivatives offset changes in the fair value of the underlying hedged items. As of September 30, 2013, we held derivatives not designated as hedging instruments to exchange an aggregate $179.4 million for various foreign currencies, including $97.3 million for euros, $18.5 million for Swiss francs, $18.0 million for British pounds, $17.4 million for Australian dollars, $13.2 million for Indonesian rupiah and $15.0 million for other currencies.
	Net gains of $7.5 million  and net losses of $1.9 million associated with our derivatives not designated as hedging instruments were included in other, net, in our condensed consolidated statements of income for the three-month periods ended September 30, 2013 and 2012, respectively. Net gains of $2.8 million and net losses of $200,000 associated with our derivatives not designated as hedging instruments were included in other, net, in our condensed consolidated statements of income for the nine-month periods ended September 30, 2013 and 2012, respectively.
	As of September 30, 2013, 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 $200,000.

Noncontrolling_Interests_Notes

Noncontrolling Interests (Notes)	9 Months Ended
	Sep. 30, 2013
Noncontrolling Interest [Abstract]
Noncontrolling Interests	Noncontrolling Interests
	Third parties hold a noncontrolling ownership interest in certain of our non-U.S. subsidiaries. Noncontrolling interests are classified as equity on our condensed consolidated balance sheets, and net income attributable to noncontrolling interests is presented separately on our condensed consolidated statements of income.
	Income from continuing operations attributable to Ensco for the three-month and nine-month periods ended September 30, 2013 and 2012 was as follows (in millions):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Income from continuing operations	$	381.4		$	361.2		$	1,064.80		$	978.9
	Income from continuing operations attributable to noncontrolling interests	(2.6		)	(1.9		)	(7.1		)	(5.3		)
	Income from continuing operations attributable to Ensco	$	378.8		$	359.3		$	1,057.70		$	973.6
	Loss from discontinued operations, net, for the three-month period ended September 30, 2012 and the nine-month periods ended September 30, 2013 and 2012 was attributable to Ensco.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share
	We compute basic and diluted earnings per share ("EPS") in accordance with the two-class method. Net income attributable to Ensco used in our computations of basic and diluted EPS is adjusted to exclude net income allocated to non-vested shares granted to our employees and non-employee directors. Weighted-average shares outstanding used in our computation of diluted EPS is calculated using the treasury stock method and excludes non-vested shares.
	The following table is a reconciliation of net income attributable to Ensco shares used in our basic and diluted EPS computations for the three-month and nine-month periods ended September 30, 2013 and 2012 (in millions):
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013				2012			2013			2012
	Net income attributable to Ensco	$	378.8			$	343.5		$	1,056.80		$	950.2
	Net income allocated to non-vested share awards	(4.0		)		(3.6		)	(11.2		)	(9.8		)
	Net income attributable to Ensco shares	$	374.8			$	339.9		$	1,045.60		$	940.4
	The following table is a reconciliation of the weighted-average shares used in our basic and diluted EPS computations for the three-month and nine-month periods ended September 30, 2013 and 2012 (in millions):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013		2012
	Weighted-average shares - basic	231.1			229.6			230.8		229.2
	Potentially dilutive shares	0.2			0.3			0.2		0.3
	Weighted-average shares - diluted	231.3			229.9			231		229.5
	Antidilutive share options totaling 300,000 and 400,000 were excluded from the computation of diluted EPS for the three-month and nine-month periods ended September 30, 2013 and 2012, respectively.

Debt_Notes

Debt (Notes)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Debt	Debt
	On May 7, 2013, we entered into a Fourth Amended and Restated Credit Agreement (the "Five-Year Credit Facility"), among Ensco, a subsidiary of Ensco, Citibank, N.A., as Administrative Agent, DNB Bank ASA, as Syndication Agent, and a syndicate of banks party thereto. The Five-Year Credit Facility provides for a $2.0 billion senior unsecured revolving credit facility to be used for general corporate purposes with a five-year term expiring on May 7, 2018. The Five-Year Credit Facility amends and restates our $1.45 billion credit agreement which was scheduled to mature on May 12, 2016. Advances under the Five-Year Credit Facility bear interest at Base Rate or LIBOR plus an applicable margin rate (currently 0.125% per annum for Base Rate advances and 1.125% per annum for LIBOR advances) depending on our credit rating. Amounts repaid may be re-borrowed during the term. We are required to pay a quarterly undrawn facility fee (currently 0.125% per annum) on the total $2.0 billion commitment, which is also based on our credit rating. In addition to other customary restrictive covenants, the Five-Year Credit Facility requires us to maintain a total debt to total capitalization ratio less than or equal to 50%. We have the right, subject to lender consent, to increase the commitments under the Five-Year Credit Facility to an aggregate amount of up to $2.5 billion. We had no amounts outstanding under the Five-Year Credit Facility as of September 30, 2013 and December 31, 2012.
	In connection with the amendment of our Five-Year Credit Facility, we terminated our $450 million 364-day revolving unsecured credit facility dated as of May 12, 2011.

ShareBased_Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Share-Based Compensation
	During the three-month and nine-month periods ended September 30, 2013, we granted 100,000 and 1.1 million non-vested share awards to our employees, officers and non-employee directors for annual equity awards and for equity awards granted to new or recently promoted employees, pursuant to our 2012 Long-Term Incentive Plan. Grants of non-vested share awards generally vest at rates of 20% or 33% per year, as determined by a committee or subcommittee of the Board of Directors at the time of the grant. Our non-vested share awards have dividend rights effective on the date of grant and are measured at fair value using the market value of our shares on the date of grant. The weighted-average grant-date fair value of non-vested share awards granted during the three-month and nine-month periods ended September 30, 2013 was $57.09 and $59.70 per share, respectively.

Discontinued_Operations_Notes

Discontinued Operations (Notes)	9 Months Ended
	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations
	During the first quarter of 2013, we sold jackup rig Pride Pennsylvania for net proceeds of $15.5 million. The proceeds were included in investing activities of discontinued operations in our condensed consolidated statement of cash flows for the nine-month period ended September 30, 2013. We recognized a loss of $1.1 million in connection with the disposal, which was included in loss from discontinued operations, net in our condensed consolidated statement of income for the nine-month period ended September 30, 2013. During the third quarter of 2012, we classified Pride Pennsylvania as held for sale and the rig was written down to fair value less estimated cost to sell. We recognized a $3.8 million loss for assets classified as held for sale during the third quarter of 2012. Pride Pennsylvania operating results were reclassified to discontinued operations in our condensed consolidated statements of income for the three-month and nine-month periods ended September 30, 2012.
	During 2012, we sold three jackup rigs (ENSCO 59, ENSCO 61 and Pride Hawaii), one moored semisubmersible rig (ENSCO 5003) and our last remaining barge rig (ENSCO I). The rigs' operating results were reclassified to discontinued operations in our condensed consolidated statements of income for the three-month and nine-month periods ended September 30, 2012.
	ENSCO I was sold during the three-month period ended September 30, 2012 for net proceeds of $4.5 million. The sale resulted in a loss of $6.5 million, which was included in loss from discontinued operations, net in our condensed consolidated statement of income for the three-month period ended September 30, 2012. ENSCO 59 and ENSCO 61 were sold during the nine-month period ended September 30, 2012 for net proceeds of $54.5 million. We recognized a gain of $12.8 million in connection with these disposals which was included in loss from discontinued operations, net in our condensed consolidated statement of income for the nine-month period ended September 30, 2012. The proceeds from these sales were included in investing activities of discontinued operations in our condensed consolidated statement of cash flows for the nine-month period ended September 30, 2012.
	The following table summarizes loss from discontinued operations for the three-month and nine-month periods ended September 30, 2013 and 2012 (in millions):
		Three Months Ended September 30,					Nine Months Ended September 30,
		2013		2012			2013			2012
	Revenues	$	—	$	—		$	—		$	6.7
	Operating expenses	—		6.9			0.1			40.2
	Operating loss	—		(6.9		)	(.1		)	(33.5		)
	Other income	—		0.4			0.3			1.1
	Income tax benefit	—		1			—			6.5
	(Loss) gain on disposal of discontinued operations, net	—		(10.3		)	(1.1		)	2.5
	Loss from discontinued operations	$	—	$	(15.8	)	$	(.9	)	$	(23.4	)
	Debt and interest expense are not allocated to our discontinued operations.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income Taxes	Income Taxes
	Our consolidated effective income tax rate for the three-month and nine-month periods ended September 30, 2013 was 16.1% and 14.1%, respectively, as compared to 11.5% in the prior year periods. Excluding the impact of discrete items, our consolidated effective income tax rate for the three-month and nine-month periods ended September 30, 2013 was 15.6% and 13.2%, respectively, as compared to 12.2% and 12.4% in the prior year periods. The increase in both periods was attributable to an increase in our estimated effective tax rate for the year ended December 31, 2013, excluding discrete items, to 13.2%, primarily due to a decline in the relative components of our earnings generated in tax jurisdictions with lower tax rates.
	Discrete tax expense for the three-month and nine-month periods ended September 30, 2013 was primarily attributable to the recognition of a $7.4 million liability for taxes associated with a $30.6 million reimbursement from the resolution of a dispute with the Mexican tax authority. See "Note 10 - Contingencies, Seahawk Tax Settlement" for additional information. Discrete tax expense for the nine-month period ended September 30, 2013 was also attributable to the recognition of a liability for unrecognized tax benefits of $4.9 million associated with a tax position taken in prior years. Discrete tax benefit for the prior year periods was attributable to the derecognition of liabilities upon the lapse of the statute of limitations applicable to uncertain tax positions, partially offset by the impact from the resolution of prior period tax matters.

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies
	Seahawk Tax Settlement
	During 2011, the Mexican tax authority drew on letters of credit issued by an Ensco subsidiary for the benefit of Seahawk Drilling Inc. ("Seahawk") under a credit support agreement executed in connection with the 2009 spin-off of Seahawk, thereby triggering a $43.7 million reimbursement payment from the Ensco subsidiary to the letter of credit issuer. The Ensco subsidiary disputed the tax authority's right to draw the letters of credit and, pursuant to a settlement agreement approved in Seahawk's bankruptcy case, initiated recovery efforts in Mexico to reclaim the Ensco subsidiary's funds. During the three-month period ended September 30, 2013, we resolved Seahawk's underlying tax assessments and related controversies under an amnesty program for substantially less than the amount drawn under the credit support agreement and received a $30.6 million reimbursement from the Mexican tax authority, which was included in other, net in our condensed consolidated statements of income for the three-month and nine-month periods ended September 30, 2013.
	ENSCO 74 Loss
	During 2008, ENSCO 74 was lost as a result of Hurricane Ike in the U.S. Gulf of Mexico.  Portions of its legs remained underwater adjacent to the customer's platform, and the sunken rig hull of ENSCO 74 was located approximately 95 miles from the original drilling location when it was struck by an oil tanker during 2009.  Wreck removal operations on the sunken rig hull of ENSCO 74 were completed during 2010.
	During 2012, we entered into an agreement with the customer pursuant to which, among other matters, the customer agreed to remove the legs. Regardless of the actual removal costs incurred by the customer, we agreed to pay $19.0 million in nine installments upon the completion of certain milestones during the removal. We have insurance coverage for the actual removal costs incurred by the customer.
	We paid $14.0 million to the customer through September 30, 2013 and received $13.6 million in insurance reimbursements. Our condensed consolidated balance sheet as of September 30, 2013 included a $5.0 million liability for remaining installments due to the customer in accrued liabilities and other and a $5.4 million receivable for recovery of related costs under our insurance policy in other assets, net.
	We filed a petition for exoneration or limitation of liability under U.S. admiralty and maritime law during 2009. A number of claimants presented claims in the exoneration/limitation proceedings. Currently, only three claimants remain.
	The owner of the oil tanker that struck the hull of ENSCO 74 filed claims seeking monetary damages currently in excess of $5.0 million for losses incurred when the tanker struck the sunken hull of ENSCO 74. The owner of a pipeline filed claims alleging that ENSCO 74 caused the pipeline to rupture during Hurricane Ike and sought damages for the cost of repairs and business interruption in an amount in excess of $26.0 million. These matters are currently scheduled for trial in April 2014. Based on information currently available, primarily the adequacy of available defenses, we have not concluded that it is probable liabilities exist with respect to these matters.
	We have liability insurance policies that provide coverage for claims such as the tanker and pipeline claims as well as removal of wreckage and debris in excess of the property insurance policy sublimit, subject to a $10.0 million per occurrence self-insured retention for third-party claims and an annual aggregate limit of $500.0 million. We believe all liabilities associated with the ENSCO 74 loss during Hurricane Ike resulted from a single occurrence under the terms of the applicable insurance policies. However, legal counsel for certain liability underwriters have asserted that the liability claims arise from separate occurrences. In the event of multiple occurrences, the self-insured retention is $15.0 million for two occurrences and $1.0 million for each occurrence thereafter.
	Although we do not expect final disposition of the claims associated with the ENSCO 74 loss to have a material adverse effect upon our financial position, operating results or cash flows, there can be no assurances as to the ultimate outcome.
	Asbestos Litigation
	We and certain subsidiaries have been named as defendants, along with numerous third-party companies as co-defendants, in multi-party lawsuits filed in Mississippi and Louisiana by approximately 100 plaintiffs. The lawsuits seek an unspecified amount of monetary damages on behalf of individuals alleging personal injury or death, primarily under the Jones Act, purportedly resulting from exposure to asbestos on drilling rigs and associated facilities during the 1960s through the 1980s.
	We intend to vigorously defend against these claims and have filed responsive pleadings preserving all defenses and challenges to jurisdiction and venue. However, discovery is still ongoing and, therefore, available information regarding the nature of all pending claims is limited. At present, we cannot reasonably determine how many of the claimants may have valid claims under the Jones Act or estimate a range of potential liability exposure, if any.
	In addition to the pending cases in Mississippi and Louisiana, we have other asbestos or lung injury claims pending against us in litigation in other jurisdictions. Although we do not expect final disposition of these asbestos or lung injury lawsuits to have a material adverse effect upon our financial position, operating results or cash flows, there can be no assurances as to the ultimate outcome of the lawsuits.
	Other Matters
	In addition to the foregoing, we are named defendants or parties in certain other lawsuits, claims or proceedings incidental to our business and are involved from time to time as parties to governmental investigations or proceedings, including matters related to taxation, arising in the ordinary course of business. Although the outcome of such lawsuits or other proceedings cannot be predicted with certainty and the amount of any liability that could arise with respect to such lawsuits or other proceedings cannot be predicted accurately, we do not expect these matters to have a material adverse effect on our financial position, operating results or cash flows.
	In the ordinary course of business with customers and others, we have entered into letters of credit and surety bonds 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 and surety bonds outstanding as of September 30, 2013 totaled $234.0 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 September 30, 2013, we had not been required to make collateral deposits with respect to these agreements.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2013
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 currently consists of management services on rigs owned by third-parties. Our two reportable segments, Floaters and Jackups, provide one service, contract drilling.
	Segment information is presented below (in millions). General and administrative expense and depreciation expense incurred by our corporate office are not allocated to our operating segments for purposes of measuring segment operating income and were included in "Reconciling Items." We measure segment assets as property and equipment. Prior year information has been reclassified to conform to the current year presentation.
	Three Months Ended September 30, 2013
		Floaters			Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
	Revenues	$	787.9		$	459.6	$	18.7	$	1,266.20	$	—		$	1,266.20
	Operating expenses
	Contract drilling (exclusive of depreciation)	394.1			210		15.1		619.2		—			619.2
	Depreciation	110.6			41.1		—		151.7		1.6			153.3
	General and administrative	—			—		—		—		37.4			37.4
	Operating income (loss)	$	283.2		$	208.5	$	3.6	$	495.3	$	(39.0	)	$	456.3
	Property and equipment, net	$	11,252.80		$	2,705.40	$	—	$	13,958.20	$	39.2		$	13,997.40
	Three Months Ended September 30, 2012
		Floaters			Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
	Revenues	$	723		$	380.8	$	19.7	$	1,123.50	$	—		$	1,123.50
	Operating expenses
	Contract drilling (exclusive of depreciation)	305.7			187.2		14.4		507.3		—			507.3
	Depreciation	98.8			41.9		—		140.7		1.7			142.4
	General and administrative	—			—		—		—		40.2			40.2
	Operating income (loss)	$	318.5		$	151.7	$	5.3	$	475.5	$	(41.9	)	$	433.6
	Property and equipment, net	$	10,706.30		$	2,387.70	$	—	$	13,094.00	$	26		$	13,120.00
	Nine Months Ended September 30, 2013
		Floaters			Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
	Revenues	$	2,330.50		$	1,274.50	$	59.2	$	3,664.20	$	—		$	3,664.20
	Operating expenses
	Contract drilling (exclusive of depreciation)	1,116.20			623.8		46.8		1,786.80		—			1,786.80
	Depreciation	328.6			121.8		—		450.4		4.8			455.2
	General and administrative	—			—		—		—		111.6			111.6
	Operating income (loss)	$	885.7		$	528.9	$	12.4	$	1,427.00	$	(116.4	)	$	1,310.60
	Property and equipment, net	$	11,252.80		$	2,705.40	$	—	$	13,958.20	$	39.2		$	13,997.40
	Nine Months Ended September 30, 2012
		Floaters			Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
	Revenues	$	2,035.50		$	1,117.20	$	62.5	$	3,215.20	$	—		$	3,215.20
	Operating expenses
	Contract drilling (exclusive of depreciation)	912			545.6		45.9		1,503.50		—			1,503.50
	Depreciation	282.8			124.7		—		407.5		7.2			414.7
	General and administrative	—			—		—		—		113.9			113.9
	Operating income (loss)	$	840.7		$	446.9	$	16.6	$	1,304.20	$	(121.1	)	$	1,183.10
	Property and equipment, net	$	10,706.30		$	2,387.70	$	—	$	13,094.00	$	26		$	13,120.00
	Information about Geographic Areas
	As of September 30, 2013, the geographic distribution of our drilling rigs by reportable segment was as follows:
		Floaters		Jackups	Total(1)
	North & South America (excluding Brazil)	8		14	22
	Middle East & Africa	6		9	15
	Asia & Pacific Rim	2		11	13
	Europe & Mediterranean	1		9	10
	Brazil	9		—	9
	Asia & Pacific Rim (under construction)	3		3	6
	Total	29		46	75
	(1)	We provide management services on two rigs owned by third-parties not included in the table above.

Supplemental_Financial_Informa

Supplemental Financial Information	9 Months Ended
	Sep. 30, 2013
Supplemental Financial Information [Abstract]
Supplemental Financial Information	Supplemental Financial Information
	Consolidated Balance Sheet Information
	Accounts receivable, net, consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Trade	$	790.2		$	812.4
	Other	10.6			18.2
		800.8			830.6
	Allowance for doubtful accounts	(25.3		)	(19.2		)
		$	775.5		$	811.4
	The liquidity of OGX Petróleo e Gás Participações S.A. ("OGX") deteriorated during the third quarter of 2013, and on October 1, 2013, OGX defaulted on an interest payment due to bondholders. We did not recognize revenue for drilling services provided to the customer during the three-month period ended September 30, 2013 as we concluded collectibility of these amounts was not reasonably assured. Additionally, we recognized an $11.0 million provision for doubtful accounts during the three-month period ended September 30, 2013 for receivables related to drilling services provided in prior quarters. Our net receivable with the customer totaled $3.6 million as of September 30, 2013 and was included in accounts receivable, net, on our condensed consolidated balance sheet.
	Other current assets consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Inventory	$	239.8		$	207.8
	Prepaid taxes	70.9			62.2
	Deferred costs	42.5			46.9
	Prepaid expenses	21.3			20.3
	Deferred tax assets	20.1			14.6
	Derivative assets	12.1			5.2
	Short-term investments	—			50
	Assets held for sale	—			14.2
	Other	9.5			4.2
		$	416.2		$	425.4
	Other assets, net, consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Intangible assets	$	92.6		$	143.3
	Unbilled receivables	59.7			77.1
	Prepaid taxes on intercompany transfers of property	53.5			58.3
	Deferred costs	37.8			45.2
	Supplemental executive retirement plan assets	35.9			29.8
	Warranty and other claim receivables	30.6			30.6
	Deferred tax assets	27.5			19.3
	Wreckage and debris removal receivables	5.4			13.2
	Other	11.4			5
		$	354.4		$	421.8
	Accrued liabilities and other consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Personnel costs	$	220.5		$	231.1
	Deferred revenue	136			146.9
	Taxes	91.8			86.9
	Interest	34.8			67.9
	Wreckage and debris removal	5			9
	Other	30.3			42.6
		$	518.4		$	584.4
	Other liabilities consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Deferred revenue	$	200.8		$	224.5
	Unrecognized tax benefits (inclusive of interest and penalties)	135.3			129.6
	Intangible liabilities	76.8			118
	Supplemental executive retirement plan liabilities	39			33.3
	Personnel costs	33.3			31.6
	Other	30.2			36.4
		$	515.4		$	573.4
	Accumulated other comprehensive income consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Derivative Instruments	$	21.3		$	24.4
	Other	(3.8		)	(4.3		)
		$	17.5		$	20.1
	Concentration of Risk
We are exposed to credit risk relating to our receivables from customers, our cash and cash equivalents and our use of derivatives in connection with the management of foreign currency exchange rate risk. We mitigate our credit risk relating to receivables from customers, which consist primarily of major international, government-owned and independent oil and gas companies, by performing ongoing credit evaluations. We also maintain reserves for potential credit losses, which generally have been within management's expectations. 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 counterparties of our derivatives through a variety of techniques, including transacting with multiple, high-quality financial institutions, thereby limiting our exposure to individual counterparties and by entering into International Swaps and Derivatives Association, Inc. (“ISDA”) Master Agreements, which include provisions for a legally enforceable master netting agreement, with almost all of our derivative counterparties. The terms of the ISDA agreements may also include credit support requirements, cross default provisions, termination events, or set-off provisions, in addition to a master netting agreement.  Legally enforceable master netting agreements reduce credit risk by providing protection in bankruptcy in certain circumstances and generally permitting the closeout and netting of transactions with the same counterparty upon the occurrence of certain events.
During the three-month and nine-month periods ended September 30, 2013, Petrobras accounted for $207.7 million and $623.3 million, or 16% and 17%, of our consolidated revenues, respectively, which were attributable to our Floaters segment.
During the three-month period ended September 30, 2013, revenues provided by our drilling operations in the U.S. Gulf of Mexico totaled $447.2 million, or 35%, of our consolidated revenues, of which 76% were provided by our Floaters segment. Revenues provided by our drilling operations in Brazil during the three-month period ended September 30, 2013 totaled $236.5 million, or 19%, of our consolidated revenues, all of which were provided by our Floaters segment.
During the nine-month period ended September 30, 2013, revenues provided by our drilling operations in the U.S. Gulf of Mexico totaled $1.3 billion, or 35%, of our consolidated revenues, of which 76% were provided by our Floaters segment. Revenues provided by our drilling operations in Brazil during the nine-month period ended September 30, 2013 totaled $748.2 million, or 20%, of our consolidated revenues, all of which were provided by our Floaters segment.

Guarantee_Of_Registered_Securi

Guarantee Of Registered Securities	9 Months Ended
	Sep. 30, 2013
Guarantees [Abstract]
Guarantee Of Registered Securities	Guarantee of Registered Securities
	On May 31, 2011, Ensco plc completed a merger transaction (the "Merger") with Pride International Inc. ("Pride"). In connection with the Merger, Ensco plc and Pride entered into a supplemental indenture to the indenture dated as of July 1, 2004 between Pride and the Bank of New York Mellon, as indenture trustee, providing for, among other matters, the full and unconditional guarantee by Ensco plc of Pride’s 8.5% unsecured senior notes due 2019, 6.875% unsecured senior notes due 2020 and 7.875% unsecured senior notes due 2040, which had an aggregate outstanding principal balance of $1.7 billion as of September 30, 2013. The Ensco plc guarantee provides for the unconditional and irrevocable guarantee of the prompt payment, when due, of any amount owed to the holders of the notes.
	Ensco plc is also a full and unconditional guarantor of the 7.2% debentures due 2027 issued by ENSCO International Incorporated during 1997, which had an aggregate outstanding principal balance of $150.0 million as of September 30, 2013.
	All guarantees are unsecured obligations of Ensco plc ranking equal in right of payment with all of its existing and future unsecured and unsubordinated indebtedness.
	The following tables present the unaudited condensed consolidating statements of income for the three-month and nine-month periods ended September 30, 2013 and 2012; the unaudited condensed consolidating statements of comprehensive income for the three-month and nine-month periods ended September 30, 2013 and 2012; the condensed consolidating balance sheets as of September 30, 2013 (unaudited) and December 31, 2012; and the unaudited condensed consolidating statements of cash flows for the nine-month periods ended September 30, 2013 and 2012, in accordance with Rule 3-10 of Regulation S-X.
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
	Three Months Ended September 30, 2013
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	OPERATING REVENUES	$	5.5		$	38.1		$	—		$	1,300.20		$	(77.6	)	$	1,266.20
	OPERATING EXPENSES
	Contract drilling (exclusive of depreciation)	13			38.1			—			645.7			(77.6		)	619.2
	Depreciation	—			1			—			152.3			—			153.3
	General and administrative	15.2			0.1			—			22.1			—			37.4
	OPERATING (LOSS) INCOME	(22.7		)	(1.1		)	—			480.1			—			456.3
	OTHER (EXPENSE) INCOME, NET	(18.1		)	5.9			15.5			(4.9		)	—			(1.6		)
	(LOSS) INCOME BEFORE INCOME TAXES	(40.8		)	4.8			15.5			475.2			—			454.7
	INCOME TAX PROVISION	—			16.2			—			57.1			—			73.3
	EQUITY EARNINGS IN AFFILIATES, NET OF TAX	419.6			65.2			35.3			—			(520.1		)	—
	NET INCOME	378.8			53.8			50.8			418.1			(520.1		)	381.4
	NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(2.6		)	—			(2.6		)
	NET INCOME ATTRIBUTABLE TO ENSCO	$	378.8		$	53.8		$	50.8		$	415.5		$	(520.1	)	$	378.8
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
	Three Months Ended September 30, 2012
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	OPERATING REVENUES	$	5.7		$	32.4		$	—		$	1,162.10		$	(76.7	)	$	1,123.50
	OPERATING EXPENSES
	Contract drilling (exclusive of depreciation)	23.2			32.4			—			528.4			(76.7		)	507.3
	Depreciation	0.1			0.9			—			141.4			—			142.4
	General and administrative	19.6			—			—			20.6			—			40.2
	OPERATING (LOSS) INCOME	(37.2		)	(.9		)	—			471.7			—			433.6
	OTHER EXPENSE, NET	(11.3		)	—			(12.4		)	(1.8		)	—			(25.5		)
	(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(48.5		)	(.9		)	(12.4		)	469.9			—			408.1
	INCOME TAX PROVISION	—			13			(7.0		)	40.9			—			46.9
	DISCONTINUED OPERATIONS, NET	—			—			—			(15.8		)	—			(15.8		)
	EQUITY EARNINGS IN AFFILIATES, NET OF TAX	392			95			124.1			—			(611.1		)	—
	NET INCOME	343.5			81.1			118.7			413.2			(611.1		)	345.4
	NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.9		)	—			(1.9		)
	NET INCOME ATTRIBUTABLE TO ENSCO	$	343.5		$	81.1		$	118.7		$	411.3		$	(611.1	)	$	343.5
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
	Nine Months Ended September 30, 2013
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	OPERATING REVENUES	$	16.5		$	114.4		$	—		$	3,766.20		$	(232.9	)	$	3,664.20
	OPERATING EXPENSES
	Contract drilling (exclusive of depreciation)	38.2			114.4			—			1,867.10			(232.9		)	1,786.80
	Depreciation	0.2			2.8			—			452.2			—			455.2
	General and administrative	48.3			0.4			—			62.9			—			111.6
	OPERATING (LOSS) INCOME	(70.2		)	(3.2		)	—			1,384.00			—			1,310.60
	OTHER EXPENSE, NET	(48.0		)	(7.2		)	(15.1		)	(.9		)	—			(71.2		)
	(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(118.2		)	(10.4		)	(15.1		)	1,383.10			—			1,239.40
	INCOME TAX PROVISION	—			76.9			—			97.7			—			174.6
	DISCONTINUED OPERATIONS, NET	—			—			—			(.9		)	—			(.9		)
	EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,175.00			255.7			164.9			—			(1,595.6		)	—
	NET INCOME	1,056.80			168.4			149.8			1,284.50			(1,595.6		)	1,063.90
	NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(7.1		)	—			(7.1		)
	NET INCOME ATTRIBUTABLE TO ENSCO	$	1,056.80		$	168.4		$	149.8		$	1,277.40		$	(1,595.6	)	$	1,056.80
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF INCOME
Nine Months Ended September 30, 2012
(in millions)
(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	39		$	107.7		$	—		$	3,314.50		$	(246.0	)	$	3,215.20
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	49.3			107.7			—			1,592.50			(246.0		)	1,503.50
Depreciation	0.3			2.6			—			411.8			—			414.7
General and administrative	48.1			0.1			—			65.7			—			113.9
OPERATING (LOSS) INCOME	(58.7		)	(2.7		)	—			1,244.50			—			1,183.10
OTHER EXPENSE, NET	(31.4		)	(5.9		)	(39.0		)	(.6		)	—			(76.9		)
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(90.1		)	(8.6		)	(39.0		)	1,243.90			—			1,106.20
INCOME TAX PROVISION	—			45.9			—			81.4			—			127.3
DISCONTINUED OPERATIONS, NET	—			—			—			(23.4		)	—			(23.4		)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,040.30			220.6			300.9			—			(1,561.8		)	—
NET INCOME	950.2			166.1			261.9			1,139.10			(1,561.8		)	955.5
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(5.3		)	—			(5.3		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	950.2		$	166.1		$	261.9		$	1,133.80		$	(1,561.8	)	$	950.2
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Three Months Ended September 30, 2013
(in millions)
(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	378.8		$	53.8		$	50.8		$	418.1		$	(520.1	)	$	381.4
OTHER COMPREHENSIVE INCOME, NET
Net change in fair value of derivatives	—			8.3			—			—			—			8.3
Reclassification of net losses on derivative instruments from other comprehensive income into net income	—			2.8			—			—			—			2.8
NET OTHER COMPREHENSIVE INCOME	—			11.1			—			—			—			11.1
COMPREHENSIVE INCOME	378.8			64.9			50.8			418.1			(520.1		)	392.5
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(2.6		)	—			(2.6		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	378.8		$	64.9		$	50.8		$	415.5		$	(520.1	)	$	389.9
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Three Months Ended September 30, 2012
(in millions)
(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	343.5		$	81.1		$	118.7		$	413.2		$	(611.1	)	$	345.4
OTHER COMPREHENSIVE(LOSS) INCOME, NET
Net change in fair value of derivatives	—			2.7			—			1.3			—			4
Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	—			0.1			—			(.4		)	—			(.3		)
NET OTHER COMPREHENSIVE INCOME	—			2.8			—			0.9			—			3.7
COMPREHENSIVE INCOME	343.5			83.9			118.7			414.1			(611.1		)	349.1
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.9		)	—			(1.9		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	343.5		$	83.9		$	118.7		$	412.2		$	(611.1	)	$	347.2
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Nine Months Ended September 30, 2013
(in millions)
(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	1,056.80		$	168.4		$	149.8		$	1,284.50		$	(1,595.6	)	$	1,063.90
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	—			(5.3		)	—			—			—			(5.3		)
Reclassification of net losses on derivative instruments from other comprehensive income into net income	—			2.2			—			—			—			2.2
Other	—			—			—			0.5			—			0.5
NET OTHER COMPREHENSIVE (LOSS) INCOME	—			(3.1		)	—			0.5			—			(2.6		)
COMPREHENSIVE INCOME	1,056.80			165.3			149.8			1,285.00			(1,595.6		)	1,061.30
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(7.1		)	—			(7.1		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	1,056.80		$	165.3		$	149.8		$	1,277.90		$	(1,595.6	)	$	1,054.20
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Nine Months Ended September 30, 2012
(in millions)
(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
NET INCOME	$	950.2		$	166.1		$	261.9		$	1,139.10		$	(1,561.8	)	$	955.5
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	—			5.5			—			4.7			—			10.2
Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	—			0.2			—			(1.4		)	—			(1.2		)
Other	—			—			—			(1.5		)	—			(1.5		)
NET OTHER COMPREHENSIVE INCOME	—			5.7			—			1.8			—			7.5
COMPREHENSIVE INCOME	950.2			171.8			261.9			1,140.90			(1,561.8		)	963
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(5.3		)	—			(5.3		)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	950.2		$	171.8		$	261.9		$	1,135.60		$	(1,561.8	)	$	957.7
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEETS
30-Sep-13
(in millions)
(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	145.3		$	0.4		$	12.1		$	167.6		$	—		$	325.4
Accounts receivable, net	—			—			—			775.5			—			775.5
Accounts receivable from affiliates	1,307.20			197.3			4.2			3,547.40			(5,056.1		)	—
Other	3.2			41			3.1			368.9			—			416.2
Total current assets	1,455.70			238.7			19.4			4,859.40			(5,056.1		)	1,517.10
PROPERTY AND EQUIPMENT, AT COST	2.1			34			—			16,997.30			—			17,033.40
Less accumulated depreciation	1.4			25.3			—			3,009.30			—			3,036.00
Property and equipment, net	0.7			8.7			—			13,988.00			—			13,997.40
GOODWILL	—			—			—			3,274.00			—			3,274.00
DUE FROM AFFILIATES	3,473.50			3,996.20			1,913.30			4,442.00			(13,825.0		)	—
INVESTMENTS IN AFFILIATES	14,429.20			2,949.40			3,948.70			—			(21,327.3		)	—
OTHER ASSETS, NET	9.5			64.1			—			280.8			—			354.4
	$	19,368.60		$	7,257.10		$	5,881.40		$	26,844.20		$	(40,208.4	)	$	19,142.90
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	6.4		$	38.2		$	23.4		$	825		$	—		$	893
Accounts payable to affiliates	3,460.30			132.7			—			1,463.10			(5,056.1		)	$	—
Current maturities of long-term debt	—			—			—			47.5			—			$	47.5
Total current liabilities	3,466.70			170.9			23.4			2,335.60			(5,056.1		)	940.5
DUE TO AFFILIATES	826.6			2,518.20			1,148.70			9,331.50			(13,825.0		)	—
LONG-TERM DEBT	2,472.70			149.1			2,016.20			105.6			—			4,743.60
DEFERRED INCOME TAXES	—			309.4			—			31.4			—			340.8
OTHER LIABILITIES	—			2.4			9.4			503.6			—			515.4
ENSCO SHAREHOLDERS' EQUITY	12,602.60			4,107.10			2,683.70			14,527.00			(21,327.3		)	12,593.10
NONCONTROLLING INTERESTS	—			—			—			9.5			—			9.5
Total equity	12,602.60			4,107.10			2,683.70			14,536.50			(21,327.3		)	12,602.60
	$	19,368.60		$	7,257.10		$	5,881.40		$	26,844.20		$	(40,208.4	)	$	19,142.90
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEETS
31-Dec-12
(in millions)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	271.8		$	1.7		$	85		$	128.6		$	—		$	487.1
Accounts receivable, net	—			0.2			—			811.2			—			811.4
Accounts receivable from affiliates	1,294.50			226.5			—			2,375.10			(3,896.1		)	—
Other	2.8			24.9			—			397.7			—			425.4
Total current assets	1,569.10			253.3			85			3,712.60			(3,896.1		)	1,723.90
PROPERTY AND EQUIPMENT, AT COST	2.1			30.2			—			15,704.80			—			15,737.10
Less accumulated depreciation	1.1			23.5			—			2,566.90			—			2,591.50
Property and equipment, net	1			6.7			—			13,137.90			—			13,145.60
GOODWILL	—			—			—			3,274.00			—			3,274.00
DUE FROM AFFILIATES	3,483.50			3,594.70			1,628.40			4,748.90			(13,455.5		)	—
INVESTMENTS IN AFFILIATES	13,469.30			2,693.80			3,824.80			—			(19,987.9		)	—
OTHER ASSETS, NET	11.3			67.4			—			343.1			—			421.8
	$	18,534.20		$	6,615.90		$	5,538.20		$	25,216.50		$	(37,339.5	)	$	18,565.30
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	31		$	28.1		$	34.1		$	849		$	—		$	942.2
Accounts payable to affiliates	2,364.80			136.9			—			1,394.40			(3,896.1		)	—
Current maturities of long-term debt	—			—			—			47.5			—			47.5
Total current liabilities	2,395.80			165			34.1			2,290.90			(3,896.1		)	989.7
DUE TO AFFILIATES	1,816.70			2,054.70			877.5			8,706.60			(13,455.5		)	—
LONG-TERM DEBT	2,469.60			149			2,040.80			139			—			4,798.40
DEFERRED INCOME TAXES	—			335.1			—			16.6			—			351.7
OTHER LIABILITIES	—			—			10.8			562.6			—			573.4
ENSCO SHAREHOLDERS' EQUITY	11,852.10			3,912.10			2,575.00			13,495.10			(19,987.9		)	11,846.40
NONCONTROLLING INTERESTS	—			—			—			5.7			—			5.7
Total equity	11,852.10			3,912.10			2,575.00			13,500.80			(19,987.9		)	11,852.10
	$	18,534.20		$	6,615.90		$	5,538.20		$	25,216.50		$	(37,339.5	)	$	18,565.30
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
Nine Months Ended September 30, 2013
(in millions)
(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	$	(138.0	)	$	(114.3	)	$	(54.1	)	$	1,738.80		$	—		$	1,432.40
INVESTING ACTIVITIES
Additions to property and equipment	—			—			—			(1,282.7		)	—			(1,282.7		)
Maturities of short-term investments	—			—			—			50			—			50
Other	—			(3.8		)	—			7.6			—			3.8
Net cash used in investing activities of continuing operations	—			(3.8		)	—			(1,225.1		)	—			(1,228.9		)
FINANCING ACTIVITIES
Cash dividends paid	(350.2		)	—			—			—			—			(350.2		)
Reduction of long-term borrowings	—			—			—			(30.9		)	—			(30.9		)
Proceeds from exercise of share options	22			—			—			—			—			22
Advances from (to) affiliates	353.2			121.3			(18.8		)	(455.7		)	—			—
Other	(13.5		)	(4.5		)	—			(2.8		)	—			(20.8		)
Net cash provided by (used in) financing activities	11.5			116.8			(18.8		)	(489.4		)	—			(379.9		)
DISCONTINUED OPERATIONS
Operating activities	—			—			—			0.2			—			0.2
Investing activities	—			—			—			15.5			—			15.5
Net cash provided by discontinued operations	—			—			—			15.7			—			15.7
Effect of exchange rate changes on cash and cash equivalents	—			—			—			(1.0		)	—			(1.0		)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(126.5		)	(1.3		)	(72.9		)	39			—			(161.7		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	271.8			1.7			85			128.6			—			487.1
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	145.3		$	0.4		$	12.1		$	167.6		$	—		$	325.4
ENSCO PLC AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
Nine Months Ended September 30, 2012
(in millions)
(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	$	(83.3	)	$	(45.1	)	$	(12.8	)	$	1,737.80		$	—		$	1,596.60
INVESTING ACTIVITIES
Additions to property and equipment	—			—			—			(1,583.8		)	—			(1,583.8		)
Maturities of short-term investments	—			—			—			4.5						4.5
Other	—			0.5			—			2.9			—			3.4
Net cash provided by (used in) investing activities of continuing operations	—			0.5			—			(1,576.4		)	—			(1,575.9		)
FINANCING ACTIVITIES
Cash dividends paid	(260.9		)	—			—			—			—			(260.9		)
Commercial paper borrowings, net	(125.0		)	—			—			—			—			(125.0		)
Reimbursement of equity issuance cost	66.7			—			—			—			—			66.7
Reduction of long-term borrowings	—			—			—			(30.9		)	—			(30.9		)
Proceeds from exercise of share options	10.2			11.9			—			—			—			22.1
Advances from (to) affiliates	210.2			34.9			0.9			(246.0		)	—			—
Other	(11.3		)	—			—			(4.1		)	—			(15.4		)
Net cash (used in) provided by financing activities	(110.1		)	46.8			0.9			(281.0		)	—			(343.4		)
DISCONTINUED OPERATIONS
Operating activities	—			—			—			(9.1		)	—			(9.1		)
Investing activities	—			—			—			59			—			59
Net cash provided by discontinued operations	—			—			—			49.9			—			49.9
Effect of exchange rate changes on cash and cash equivalents	—			—			—			1.9			—			1.9
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(193.4		)	2.2			(11.9		)	(67.8		)	—			(270.9		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	236.6			—			22.6			171.5			—			430.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	43.2		$	2.2		$	10.7		$	103.7		$	—		$	159.8

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]
Schedule Of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis	The following fair value hierarchy table categorizes information regarding our financial assets and liabilities measured at fair value on a recurring basis (in millions):
		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Total
		(Level 1)		(Level 2)		(Level 3)
	As of September 30, 2013
	Supplemental executive retirement plan assets	$	35.9	$	—	$	—	$	35.9
	Derivatives, net	—		5.6		—		5.6
	Total financial assets	$	35.9	$	5.6	$	—	$	41.5
	As of December 31, 2012
	Supplemental executive retirement plan assets	$	29.8	$	—	$	—	$	29.8
	Derivatives, net	—		5.2		—		5.2
	Total financial assets	$	29.8	$	5.2	$	—	$	35
Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments	The carrying values and estimated fair values of our long-term debt instruments were as follows (in millions):
		September 30,				December 31,
		2013				2012
		Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
	4.7% Senior notes due 2021	$	1,476.50	$	1,590.20	$	1,474.70	$	1,715.60
	6.875% Senior notes due 2020	1,028.80		1,086.80		1,040.60		1,138.30
	3.25% Senior notes due 2016	996.1		1,043.70		995.1		1,068.90
	8.5% Senior notes due 2019	604.5		634.2		616.4		661.7
	7.875% Senior notes due 2040	382.9		407.1		383.8		423.9
	7.2% Debentures due 2027	149.1		174.1		149		193.2
	4.33% MARAD bonds, including current maturities, due 2016	87.6		88.1		112.3		113
	4.65% MARAD bonds, including current maturities, due 2020	33.9		37.9		36		41.4
	6.36% MARAD bonds, including current maturities, due 2015	31.7		33.9		38		41.7
	Total	$	4,791.10	$	5,096.00	$	4,845.90	$	5,397.70

Derivative_Instruments_Tables

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of Derivatives At Fair Value	Derivatives recorded at fair value in our condensed consolidated balance sheets consisted of the following (in millions):
		Derivative Assets					Derivative Liabilities
		September 30,			December 31,		September 30,			December 31,
		2013			2012		2013			2012
	Derivatives Designated as Hedging Instruments
	Foreign currency forward contracts - current(1)	$	7		$	5	$	6.9		$	0.3
	Foreign currency forward contracts - non-current(2)	1.4			0.5		0.7			—
		8.4			5.5		7.6			0.3
	Derivatives Not Designated as Hedging Instruments
	Foreign currency forward contracts - current(1)	5.1			0.2		0.3			0.2
		5.1			0.2		0.3			0.2
	Total	$	13.5		$	5.7	$	7.9		$	0.5
	(1)	Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets.
	(2)	Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets, net, and other liabilities, respectively, on our condensed consolidated balance sheets.
Gains And Losses On Derivatives Designated As Cash Flow Hedges	Gains and losses, net of tax, on derivatives designated as cash flow hedges included in our condensed consolidated statements of income and comprehensive income were as follows (in millions):
	Three Months Ended September 30, 2013 and 2012
		Gain Recognized in Other Comprehensive Income (Effective Portion)					(Loss) Gain Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)(1)					Gain Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(2)
		2013			2012		2013			2012		2013			2012
	Interest rate lock contracts(3)	$	—		$	—	$	(.1	)	$	0.2	$	—		$	—
	Foreign currency forward contracts(4)	8.3			4		(2.7		)	0.1		1.2			0.6
	Total	$	8.3		$	4	$	(2.8	)	$	0.3	$	1.2		$	0.6
	Nine Months Ended September 30, 2013 and 2012
		(Loss) Gain Recognized in Other Comprehensive Income (Effective Portion)					(Loss) Gain Reclassified from AOCI into Income (Effective Portion)(1)					(Loss) Gain Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(2)
		2013			2012		2013			2012		2013			2012
	Interest rate lock contracts(3)	$	—		$	—	$	(.3	)	$	0.4	$	—		$	—
	Foreign currency forward contracts(5)	(5.3		)	10.2		(1.9		)	0.8		(.2		)	0.8
	Total	$	(5.3	)	$	10.2	$	(2.2	)	$	1.2	$	(.2	)	$	0.8
	-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 income.
	-3	Gains and 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 income.
	(4)	During the three-month period ended September 30, 2013, $2.9 million of losses were reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of income.
	(5)	During the nine-month period ended September 30, 2013, $2.5 million of losses were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of income.

Noncontrolling_Interests_Table

Noncontrolling Interests (Tables)	9 Months Ended
	Sep. 30, 2013
Noncontrolling Interest [Abstract]
Reconciliation of Income from Continuing Operations	Income from continuing operations attributable to Ensco for the three-month and nine-month periods ended September 30, 2013 and 2012 was as follows (in millions):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Income from continuing operations	$	381.4		$	361.2		$	1,064.80		$	978.9
	Income from continuing operations attributable to noncontrolling interests	(2.6		)	(1.9		)	(7.1		)	(5.3		)
	Income from continuing operations attributable to Ensco	$	378.8		$	359.3		$	1,057.70		$	973.6

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Reconciliation Of Net Income Attributable To Ensco Shares	The following table is a reconciliation of net income attributable to Ensco shares used in our basic and diluted EPS computations for the three-month and nine-month periods ended September 30, 2013 and 2012 (in millions):
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013				2012			2013			2012
	Net income attributable to Ensco	$	378.8			$	343.5		$	1,056.80		$	950.2
	Net income allocated to non-vested share awards	(4.0		)		(3.6		)	(11.2		)	(9.8		)
	Net income attributable to Ensco shares	$	374.8			$	339.9		$	1,045.60		$	940.4
Reconciliation Of Weighted-Average Shares Used In Earnings Per Share Computations	The following table is a reconciliation of the weighted-average shares used in our basic and diluted EPS computations for the three-month and nine-month periods ended September 30, 2013 and 2012 (in millions):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013		2012
	Weighted-average shares - basic	231.1			229.6			230.8		229.2
	Potentially dilutive shares	0.2			0.3			0.2		0.3
	Weighted-average shares - diluted	231.3			229.9			231		229.5

Discontinued_Operations_Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Summary of Loss from Discontinued Operations	The following table summarizes loss from discontinued operations for the three-month and nine-month periods ended September 30, 2013 and 2012 (in millions):
		Three Months Ended September 30,					Nine Months Ended September 30,
		2013		2012			2013			2012
	Revenues	$	—	$	—		$	—		$	6.7
	Operating expenses	—		6.9			0.1			40.2
	Operating loss	—		(6.9		)	(.1		)	(33.5		)
	Other income	—		0.4			0.3			1.1
	Income tax benefit	—		1			—			6.5
	(Loss) gain on disposal of discontinued operations, net	—		(10.3		)	(1.1		)	2.5
	Loss from discontinued operations	$	—	$	(15.8	)	$	(.9	)	$	(23.4	)

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Schedule Of Segment Reporting Information	Three Months Ended September 30, 2013
		Floaters			Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
	Revenues	$	787.9		$	459.6	$	18.7	$	1,266.20	$	—		$	1,266.20
	Operating expenses
	Contract drilling (exclusive of depreciation)	394.1			210		15.1		619.2		—			619.2
	Depreciation	110.6			41.1		—		151.7		1.6			153.3
	General and administrative	—			—		—		—		37.4			37.4
	Operating income (loss)	$	283.2		$	208.5	$	3.6	$	495.3	$	(39.0	)	$	456.3
	Property and equipment, net	$	11,252.80		$	2,705.40	$	—	$	13,958.20	$	39.2		$	13,997.40
	Three Months Ended September 30, 2012
		Floaters			Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
	Revenues	$	723		$	380.8	$	19.7	$	1,123.50	$	—		$	1,123.50
	Operating expenses
	Contract drilling (exclusive of depreciation)	305.7			187.2		14.4		507.3		—			507.3
	Depreciation	98.8			41.9		—		140.7		1.7			142.4
	General and administrative	—			—		—		—		40.2			40.2
	Operating income (loss)	$	318.5		$	151.7	$	5.3	$	475.5	$	(41.9	)	$	433.6
	Property and equipment, net	$	10,706.30		$	2,387.70	$	—	$	13,094.00	$	26		$	13,120.00
	Nine Months Ended September 30, 2013
		Floaters			Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
	Revenues	$	2,330.50		$	1,274.50	$	59.2	$	3,664.20	$	—		$	3,664.20
	Operating expenses
	Contract drilling (exclusive of depreciation)	1,116.20			623.8		46.8		1,786.80		—			1,786.80
	Depreciation	328.6			121.8		—		450.4		4.8			455.2
	General and administrative	—			—		—		—		111.6			111.6
	Operating income (loss)	$	885.7		$	528.9	$	12.4	$	1,427.00	$	(116.4	)	$	1,310.60
	Property and equipment, net	$	11,252.80		$	2,705.40	$	—	$	13,958.20	$	39.2		$	13,997.40
	Nine Months Ended September 30, 2012
		Floaters			Jackups		Other		Operating Segments Total		Reconciling Items			Consolidated Total
	Revenues	$	2,035.50		$	1,117.20	$	62.5	$	3,215.20	$	—		$	3,215.20
	Operating expenses
	Contract drilling (exclusive of depreciation)	912			545.6		45.9		1,503.50		—			1,503.50
	Depreciation	282.8			124.7		—		407.5		7.2			414.7
	General and administrative	—			—		—		—		113.9			113.9
	Operating income (loss)	$	840.7		$	446.9	$	16.6	$	1,304.20	$	(121.1	)	$	1,183.10
	Property and equipment, net	$	10,706.30		$	2,387.70	$	—	$	13,094.00	$	26		$	13,120.00
Schedule Of Geographic Distribution Of Rigs By Segment	As of September 30, 2013, the geographic distribution of our drilling rigs by reportable segment was as follows:
		Floaters		Jackups	Total(1)
	North & South America (excluding Brazil)	8		14	22
	Middle East & Africa	6		9	15
	Asia & Pacific Rim	2		11	13
	Europe & Mediterranean	1		9	10
	Brazil	9		—	9
	Asia & Pacific Rim (under construction)	3		3	6
	Total	29		46	75
	(1)	We provide management services on two rigs owned by third-parties not included in the table above.

Supplemental_Financial_Informa1

Supplemental Financial Information (Tables)	9 Months Ended
	Sep. 30, 2013
Supplemental Financial Information [Abstract]
Accounts Receivable, Net	Accounts receivable, net, consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Trade	$	790.2		$	812.4
	Other	10.6			18.2
		800.8			830.6
	Allowance for doubtful accounts	(25.3		)	(19.2		)
		$	775.5		$	811.4
Other Current Assets	Other current assets consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Inventory	$	239.8		$	207.8
	Prepaid taxes	70.9			62.2
	Deferred costs	42.5			46.9
	Prepaid expenses	21.3			20.3
	Deferred tax assets	20.1			14.6
	Derivative assets	12.1			5.2
	Short-term investments	—			50
	Assets held for sale	—			14.2
	Other	9.5			4.2
		$	416.2		$	425.4
Other Assets, Net	Other assets, net, consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Intangible assets	$	92.6		$	143.3
	Unbilled receivables	59.7			77.1
	Prepaid taxes on intercompany transfers of property	53.5			58.3
	Deferred costs	37.8			45.2
	Supplemental executive retirement plan assets	35.9			29.8
	Warranty and other claim receivables	30.6			30.6
	Deferred tax assets	27.5			19.3
	Wreckage and debris removal receivables	5.4			13.2
	Other	11.4			5
		$	354.4		$	421.8
Accrued Liabilities And Other	Accrued liabilities and other consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Personnel costs	$	220.5		$	231.1
	Deferred revenue	136			146.9
	Taxes	91.8			86.9
	Interest	34.8			67.9
	Wreckage and debris removal	5			9
	Other	30.3			42.6
		$	518.4		$	584.4
Other Liabilities	Other liabilities consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Deferred revenue	$	200.8		$	224.5
	Unrecognized tax benefits (inclusive of interest and penalties)	135.3			129.6
	Intangible liabilities	76.8			118
	Supplemental executive retirement plan liabilities	39			33.3
	Personnel costs	33.3			31.6
	Other	30.2			36.4
		$	515.4		$	573.4
Accumulated other comprehensive income	Accumulated other comprehensive income consisted of the following (in millions):
		September 30,			December 31,
		2013			2012
	Derivative Instruments	$	21.3		$	24.4
	Other	(3.8		)	(4.3		)
		$	17.5		$	20.1

Guarantee_Of_Registered_Securi1

Guarantee Of Registered Securities (Tables)	9 Months Ended
	Sep. 30, 2013
Guarantees [Abstract]
Condensed Consolidating Statements Of Income	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
	Three Months Ended September 30, 2013
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	OPERATING REVENUES	$	5.5		$	38.1		$	—		$	1,300.20		$	(77.6	)	$	1,266.20
	OPERATING EXPENSES
	Contract drilling (exclusive of depreciation)	13			38.1			—			645.7			(77.6		)	619.2
	Depreciation	—			1			—			152.3			—			153.3
	General and administrative	15.2			0.1			—			22.1			—			37.4
	OPERATING (LOSS) INCOME	(22.7		)	(1.1		)	—			480.1			—			456.3
	OTHER (EXPENSE) INCOME, NET	(18.1		)	5.9			15.5			(4.9		)	—			(1.6		)
	(LOSS) INCOME BEFORE INCOME TAXES	(40.8		)	4.8			15.5			475.2			—			454.7
	INCOME TAX PROVISION	—			16.2			—			57.1			—			73.3
	EQUITY EARNINGS IN AFFILIATES, NET OF TAX	419.6			65.2			35.3			—			(520.1		)	—
	NET INCOME	378.8			53.8			50.8			418.1			(520.1		)	381.4
	NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(2.6		)	—			(2.6		)
	NET INCOME ATTRIBUTABLE TO ENSCO	$	378.8		$	53.8		$	50.8		$	415.5		$	(520.1	)	$	378.8
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
	Three Months Ended September 30, 2012
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	OPERATING REVENUES	$	5.7		$	32.4		$	—		$	1,162.10		$	(76.7	)	$	1,123.50
	OPERATING EXPENSES
	Contract drilling (exclusive of depreciation)	23.2			32.4			—			528.4			(76.7		)	507.3
	Depreciation	0.1			0.9			—			141.4			—			142.4
	General and administrative	19.6			—			—			20.6			—			40.2
	OPERATING (LOSS) INCOME	(37.2		)	(.9		)	—			471.7			—			433.6
	OTHER EXPENSE, NET	(11.3		)	—			(12.4		)	(1.8		)	—			(25.5		)
	(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(48.5		)	(.9		)	(12.4		)	469.9			—			408.1
	INCOME TAX PROVISION	—			13			(7.0		)	40.9			—			46.9
	DISCONTINUED OPERATIONS, NET	—			—			—			(15.8		)	—			(15.8		)
	EQUITY EARNINGS IN AFFILIATES, NET OF TAX	392			95			124.1			—			(611.1		)	—
	NET INCOME	343.5			81.1			118.7			413.2			(611.1		)	345.4
	NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.9		)	—			(1.9		)
	NET INCOME ATTRIBUTABLE TO ENSCO	$	343.5		$	81.1		$	118.7		$	411.3		$	(611.1	)	$	343.5
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
	Nine Months Ended September 30, 2013
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	OPERATING REVENUES	$	16.5		$	114.4		$	—		$	3,766.20		$	(232.9	)	$	3,664.20
	OPERATING EXPENSES
	Contract drilling (exclusive of depreciation)	38.2			114.4			—			1,867.10			(232.9		)	1,786.80
	Depreciation	0.2			2.8			—			452.2			—			455.2
	General and administrative	48.3			0.4			—			62.9			—			111.6
	OPERATING (LOSS) INCOME	(70.2		)	(3.2		)	—			1,384.00			—			1,310.60
	OTHER EXPENSE, NET	(48.0		)	(7.2		)	(15.1		)	(.9		)	—			(71.2		)
	(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(118.2		)	(10.4		)	(15.1		)	1,383.10			—			1,239.40
	INCOME TAX PROVISION	—			76.9			—			97.7			—			174.6
	DISCONTINUED OPERATIONS, NET	—			—			—			(.9		)	—			(.9		)
	EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,175.00			255.7			164.9			—			(1,595.6		)	—
	NET INCOME	1,056.80			168.4			149.8			1,284.50			(1,595.6		)	1,063.90
	NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(7.1		)	—			(7.1		)
	NET INCOME ATTRIBUTABLE TO ENSCO	$	1,056.80		$	168.4		$	149.8		$	1,277.40		$	(1,595.6	)	$	1,056.80
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
	Nine Months Ended September 30, 2012
	(in millions)
	(Unaudited)
	Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
OPERATING REVENUES	$	39		$	107.7		$	—		$	3,314.50		$	(246.0	)	$	3,215.20
OPERATING EXPENSES
Contract drilling (exclusive of depreciation)	49.3			107.7			—			1,592.50			(246.0		)	1,503.50
Depreciation	0.3			2.6			—			411.8			—			414.7
General and administrative	48.1			0.1			—			65.7			—			113.9
OPERATING (LOSS) INCOME	(58.7		)	(2.7		)	—			1,244.50			—			1,183.10
OTHER EXPENSE, NET	(31.4		)	(5.9		)	(39.0		)	(.6		)	—			(76.9		)
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(90.1		)	(8.6		)	(39.0		)	1,243.90			—			1,106.20
INCOME TAX PROVISION	—			45.9			—			81.4			—			127.3
DISCONTINUED OPERATIONS, NET	—			—			—			(23.4		)	—			(23.4		)
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	1,040.30			220.6			300.9			—			(1,561.8		)	—
NET INCOME	950.2			166.1			261.9			1,139.10			(1,561.8		)	955.5
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(5.3		)	—			(5.3		)
NET INCOME ATTRIBUTABLE TO ENSCO	$	950.2		$	166.1		$	261.9		$	1,133.80		$	(1,561.8	)	$	950.2
Condensed Consolidating Statements Of Comprehensive Income	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
	Three Months Ended September 30, 2013
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	NET INCOME	$	378.8		$	53.8		$	50.8		$	418.1		$	(520.1	)	$	381.4
	OTHER COMPREHENSIVE INCOME, NET
	Net change in fair value of derivatives	—			8.3			—			—			—			8.3
	Reclassification of net losses on derivative instruments from other comprehensive income into net income	—			2.8			—			—			—			2.8
	NET OTHER COMPREHENSIVE INCOME	—			11.1			—			—			—			11.1
	COMPREHENSIVE INCOME	378.8			64.9			50.8			418.1			(520.1		)	392.5
	COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(2.6		)	—			(2.6		)
	COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	378.8		$	64.9		$	50.8		$	415.5		$	(520.1	)	$	389.9
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
	Three Months Ended September 30, 2012
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	NET INCOME	$	343.5		$	81.1		$	118.7		$	413.2		$	(611.1	)	$	345.4
	OTHER COMPREHENSIVE(LOSS) INCOME, NET
	Net change in fair value of derivatives	—			2.7			—			1.3			—			4
	Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	—			0.1			—			(.4		)	—			(.3		)
	NET OTHER COMPREHENSIVE INCOME	—			2.8			—			0.9			—			3.7
	COMPREHENSIVE INCOME	343.5			83.9			118.7			414.1			(611.1		)	349.1
	COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(1.9		)	—			(1.9		)
	COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	343.5		$	83.9		$	118.7		$	412.2		$	(611.1	)	$	347.2
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
	Nine Months Ended September 30, 2013
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	NET INCOME	$	1,056.80		$	168.4		$	149.8		$	1,284.50		$	(1,595.6	)	$	1,063.90
	OTHER COMPREHENSIVE (LOSS) INCOME, NET
	Net change in fair value of derivatives	—			(5.3		)	—			—			—			(5.3		)
	Reclassification of net losses on derivative instruments from other comprehensive income into net income	—			2.2			—			—			—			2.2
	Other	—			—			—			0.5			—			0.5
	NET OTHER COMPREHENSIVE (LOSS) INCOME	—			(3.1		)	—			0.5			—			(2.6		)
	COMPREHENSIVE INCOME	1,056.80			165.3			149.8			1,285.00			(1,595.6		)	1,061.30
	COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(7.1		)	—			(7.1		)
	COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	1,056.80		$	165.3		$	149.8		$	1,277.90		$	(1,595.6	)	$	1,054.20
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
	Nine Months Ended September 30, 2012
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	NET INCOME	$	950.2		$	166.1		$	261.9		$	1,139.10		$	(1,561.8	)	$	955.5
	OTHER COMPREHENSIVE (LOSS) INCOME, NET
	Net change in fair value of derivatives	—			5.5			—			4.7			—			10.2
	Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	—			0.2			—			(1.4		)	—			(1.2		)
	Other	—			—			—			(1.5		)	—			(1.5		)
	NET OTHER COMPREHENSIVE INCOME	—			5.7			—			1.8			—			7.5
	COMPREHENSIVE INCOME	950.2			171.8			261.9			1,140.90			(1,561.8		)	963
	COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			(5.3		)	—			(5.3		)
	COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$	950.2		$	171.8		$	261.9		$	1,135.60		$	(1,561.8	)	$	957.7
Condensed Consolidating Balance Sheets	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING BALANCE SHEETS
	30-Sep-13
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	ASSETS
	CURRENT ASSETS
	Cash and cash equivalents	$	145.3		$	0.4		$	12.1		$	167.6		$	—		$	325.4
	Accounts receivable, net	—			—			—			775.5			—			775.5
	Accounts receivable from affiliates	1,307.20			197.3			4.2			3,547.40			(5,056.1		)	—
	Other	3.2			41			3.1			368.9			—			416.2
	Total current assets	1,455.70			238.7			19.4			4,859.40			(5,056.1		)	1,517.10
	PROPERTY AND EQUIPMENT, AT COST	2.1			34			—			16,997.30			—			17,033.40
	Less accumulated depreciation	1.4			25.3			—			3,009.30			—			3,036.00
	Property and equipment, net	0.7			8.7			—			13,988.00			—			13,997.40
	GOODWILL	—			—			—			3,274.00			—			3,274.00
	DUE FROM AFFILIATES	3,473.50			3,996.20			1,913.30			4,442.00			(13,825.0		)	—
	INVESTMENTS IN AFFILIATES	14,429.20			2,949.40			3,948.70			—			(21,327.3		)	—
	OTHER ASSETS, NET	9.5			64.1			—			280.8			—			354.4
		$	19,368.60		$	7,257.10		$	5,881.40		$	26,844.20		$	(40,208.4	)	$	19,142.90
	LIABILITIES AND SHAREHOLDERS' EQUITY
	CURRENT LIABILITIES
	Accounts payable and accrued liabilities	$	6.4		$	38.2		$	23.4		$	825		$	—		$	893
	Accounts payable to affiliates	3,460.30			132.7			—			1,463.10			(5,056.1		)	$	—
	Current maturities of long-term debt	—			—			—			47.5			—			$	47.5
	Total current liabilities	3,466.70			170.9			23.4			2,335.60			(5,056.1		)	940.5
	DUE TO AFFILIATES	826.6			2,518.20			1,148.70			9,331.50			(13,825.0		)	—
	LONG-TERM DEBT	2,472.70			149.1			2,016.20			105.6			—			4,743.60
	DEFERRED INCOME TAXES	—			309.4			—			31.4			—			340.8
	OTHER LIABILITIES	—			2.4			9.4			503.6			—			515.4
	ENSCO SHAREHOLDERS' EQUITY	12,602.60			4,107.10			2,683.70			14,527.00			(21,327.3		)	12,593.10
	NONCONTROLLING INTERESTS	—			—			—			9.5			—			9.5
	Total equity	12,602.60			4,107.10			2,683.70			14,536.50			(21,327.3		)	12,602.60
		$	19,368.60		$	7,257.10		$	5,881.40		$	26,844.20		$	(40,208.4	)	$	19,142.90
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING BALANCE SHEETS
	31-Dec-12
	(in millions)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-Guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	ASSETS
	CURRENT ASSETS
	Cash and cash equivalents	$	271.8		$	1.7		$	85		$	128.6		$	—		$	487.1
	Accounts receivable, net	—			0.2			—			811.2			—			811.4
	Accounts receivable from affiliates	1,294.50			226.5			—			2,375.10			(3,896.1		)	—
	Other	2.8			24.9			—			397.7			—			425.4
	Total current assets	1,569.10			253.3			85			3,712.60			(3,896.1		)	1,723.90
	PROPERTY AND EQUIPMENT, AT COST	2.1			30.2			—			15,704.80			—			15,737.10
	Less accumulated depreciation	1.1			23.5			—			2,566.90			—			2,591.50
	Property and equipment, net	1			6.7			—			13,137.90			—			13,145.60
	GOODWILL	—			—			—			3,274.00			—			3,274.00
	DUE FROM AFFILIATES	3,483.50			3,594.70			1,628.40			4,748.90			(13,455.5		)	—
	INVESTMENTS IN AFFILIATES	13,469.30			2,693.80			3,824.80			—			(19,987.9		)	—
	OTHER ASSETS, NET	11.3			67.4			—			343.1			—			421.8
		$	18,534.20		$	6,615.90		$	5,538.20		$	25,216.50		$	(37,339.5	)	$	18,565.30
	LIABILITIES AND SHAREHOLDERS' EQUITY
	CURRENT LIABILITIES
	Accounts payable and accrued liabilities	$	31		$	28.1		$	34.1		$	849		$	—		$	942.2
	Accounts payable to affiliates	2,364.80			136.9			—			1,394.40			(3,896.1		)	—
	Current maturities of long-term debt	—			—			—			47.5			—			47.5
	Total current liabilities	2,395.80			165			34.1			2,290.90			(3,896.1		)	989.7
	DUE TO AFFILIATES	1,816.70			2,054.70			877.5			8,706.60			(13,455.5		)	—
	LONG-TERM DEBT	2,469.60			149			2,040.80			139			—			4,798.40
	DEFERRED INCOME TAXES	—			335.1			—			16.6			—			351.7
OTHER LIABILITIES	—			—			10.8			562.6			—			573.4
ENSCO SHAREHOLDERS' EQUITY	11,852.10			3,912.10			2,575.00			13,495.10			(19,987.9		)	11,846.40
NONCONTROLLING INTERESTS	—			—			—			5.7			—			5.7
Total equity	11,852.10			3,912.10			2,575.00			13,500.80			(19,987.9		)	11,852.10
	$	18,534.20		$	6,615.90		$	5,538.20		$	25,216.50		$	(37,339.5	)	$	18,565.30
Condensed Consolidating Statements Of Cash Flows
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	Nine Months Ended September 30, 2013
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	OPERATING ACTIVITIES
	Net cash (used in) provided by operating activities of continuing operations	$	(138.0	)	$	(114.3	)	$	(54.1	)	$	1,738.80		$	—		$	1,432.40
	INVESTING ACTIVITIES
	Additions to property and equipment	—			—			—			(1,282.7		)	—			(1,282.7		)
	Maturities of short-term investments	—			—			—			50			—			50
	Other	—			(3.8		)	—			7.6			—			3.8
	Net cash used in investing activities of continuing operations	—			(3.8		)	—			(1,225.1		)	—			(1,228.9		)
	FINANCING ACTIVITIES
	Cash dividends paid	(350.2		)	—			—			—			—			(350.2		)
	Reduction of long-term borrowings	—			—			—			(30.9		)	—			(30.9		)
	Proceeds from exercise of share options	22			—			—			—			—			22
	Advances from (to) affiliates	353.2			121.3			(18.8		)	(455.7		)	—			—
	Other	(13.5		)	(4.5		)	—			(2.8		)	—			(20.8		)
	Net cash provided by (used in) financing activities	11.5			116.8			(18.8		)	(489.4		)	—			(379.9		)
	DISCONTINUED OPERATIONS
	Operating activities	—			—			—			0.2			—			0.2
	Investing activities	—			—			—			15.5			—			15.5
	Net cash provided by discontinued operations	—			—			—			15.7			—			15.7
	Effect of exchange rate changes on cash and cash equivalents	—			—			—			(1.0		)	—			(1.0		)
	NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(126.5		)	(1.3		)	(72.9		)	39			—			(161.7		)
	CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	271.8			1.7			85			128.6			—			487.1
	CASH AND CASH EQUIVALENTS, END OF PERIOD	$	145.3		$	0.4		$	12.1		$	167.6		$	—		$	325.4
	ENSCO PLC AND SUBSIDIARIES
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	Nine Months Ended September 30, 2012
	(in millions)
	(Unaudited)
		Ensco plc			ENSCO International Incorporated			Pride International, Inc.			Other Non-guarantor Subsidiaries of Ensco			Consolidating Adjustments			Total
	OPERATING ACTIVITIES
	Net cash (used in) provided by operating activities of continuing operations	$	(83.3	)	$	(45.1	)	$	(12.8	)	$	1,737.80		$	—		$	1,596.60
	INVESTING ACTIVITIES
	Additions to property and equipment	—			—			—			(1,583.8		)	—			(1,583.8		)
	Maturities of short-term investments	—			—			—			4.5						4.5
	Other	—			0.5			—			2.9			—			3.4
	Net cash provided by (used in) investing activities of continuing operations	—			0.5			—			(1,576.4		)	—			(1,575.9		)
	FINANCING ACTIVITIES
	Cash dividends paid	(260.9		)	—			—			—			—			(260.9		)
	Commercial paper borrowings, net	(125.0		)	—			—			—			—			(125.0		)
	Reimbursement of equity issuance cost	66.7			—			—			—			—			66.7
	Reduction of long-term borrowings	—			—			—			(30.9		)	—			(30.9		)
	Proceeds from exercise of share options	10.2			11.9			—			—			—			22.1
	Advances from (to) affiliates	210.2			34.9			0.9			(246.0		)	—			—
	Other	(11.3		)	—			—			(4.1		)	—			(15.4		)
	Net cash (used in) provided by financing activities	(110.1		)	46.8			0.9			(281.0		)	—			(343.4		)
	DISCONTINUED OPERATIONS
	Operating activities	—			—			—			(9.1		)	—			(9.1		)
	Investing activities	—			—			—			59			—			59
	Net cash provided by discontinued operations	—			—			—			49.9			—			49.9
	Effect of exchange rate changes on cash and cash equivalents	—			—			—			1.9			—			1.9
	NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(193.4		)	2.2			(11.9		)	(67.8		)	—			(270.9		)
	CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	236.6			—			22.6			171.5			—			430.7
	CASH AND CASH EQUIVALENTS, END OF PERIOD	$	43.2		$	2.2		$	10.7		$	103.7		$	—		$	159.8

Fair_Value_Measurements_Schedu

Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Supplemental executive retirement plan assets	$35.90	$29.80
Derivatives, net	5.6	5.2
Total financial assets	41.5	35
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	35.9	29.8
Derivatives, net	0	0
Total financial assets	35.9	29.8
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Supplemental executive retirement plan assets	0	0
Derivatives, net	5.6	5.2
Total financial assets	5.6	5.2
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Supplemental executive retirement plan assets	0	0
Derivatives, net	0	0
Total financial assets	$0	$0

Fair_Value_Measurements_Schedu1

Fair Value Measurements (Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$4,791.10	$4,845.90
Estimated Fair Value	5,096	5,397.70
4.7% Senior notes due 2021 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	1,476.50	1,474.70
Estimated Fair Value	1,590.20	1,715.60
Debt instrument, interest rate, stated percentage	4.70%	4.70%
6.875% Senior notes due 2020 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	1,028.80	1,040.60
Estimated Fair Value	1,086.80	1,138.30
Debt instrument, interest rate, stated percentage	6.88%	6.88%
3.25% Senior notes due 2016 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	996.1	995.1
Estimated Fair Value	1,043.70	1,068.90
Debt instrument, interest rate, stated percentage	3.25%	3.25%
8.5% Senior notes due 2019 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	604.5	616.4
Estimated Fair Value	634.2	661.7
Debt instrument, interest rate, stated percentage	8.50%	8.50%
7.875% Senior notes due 2040 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	382.9	383.8
Estimated Fair Value	407.1	423.9
Debt instrument, interest rate, stated percentage	7.88%	7.88%
7.2% Debentures due 2027 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	149.1	149
Estimated Fair Value	174.1	193.2
Debt instrument, interest rate, stated percentage	7.20%	7.20%
4.33% MARAD bonds, including current maturities, due 2016 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	87.6	112.3
Estimated Fair Value	88.1	113
Debt instrument, interest rate, stated percentage	4.33%	4.33%
6.36% MARAD bonds, including current maturities, due 2015 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	31.7	38
Estimated Fair Value	33.9	41.7
Debt instrument, interest rate, stated percentage	6.36%	6.36%
4.65% MARAD bonds, including current maturities, due 2020 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	33.9	36
Estimated Fair Value	$37.90	$41.40
Debt instrument, interest rate, stated percentage	4.65%	4.65%

Derivative_Instruments_Narrati

Derivative Instruments (Narrative) (Details) (USD $)	9 Months Ended		3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013
			Not Designated [Member]	Not Designated [Member]	Not Designated [Member]	Not Designated [Member]	Foreign Exchange [Member]	Foreign Exchange [Member]
							Cash Flow Hedges [Member]	Not Designated [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net assets associated with foreign currency derivatives	$5.60	$5.20
Maturity period of derivatives (in months)	18 months
Aggregate cash flow hedges outstanding							373.2	179.4
Cash flow hedges outstanding for British pounds							158.7	18
Cash flow hedges outstanding for Brazilian reals							125.9
Cash flow hedges outstanding for Singapore dollars							35
Cash flow hedges outstanding for Australian dollars							23	17.4
Cash flow hedges outstanding for Indonesian rupiah								13.2
Cash flow hedges outstanding for euros							21.5	97.3
Cash flow hedges outstanding for Swiss francs								18.5
Cash flow hedges outstanding for other currencies							9.1	15
Net gains on derivatives not designated as hedging instruments			7.5	-1.9	-2.8	-0.2
Estimated amount of net gains associated with derivative instruments, net of tax	($0.20)

Derivative_Instruments_Schedul

Derivative Instruments (Schedule Of Derivatives At Fair Value) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Millions, unless otherwise specified
Derivative [Line Items]
Total fair value of derivative assets	$13.50		$5.70
Total fair value of derivative liabilities	7.9		0.5
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Total fair value of derivative assets	8.4		5.5
Total fair value of derivative liabilities	7.6		0.3
Designated As Hedging Instrument [Member] | Foreign Currency Forward Contracts - Current [Member]
Derivative [Line Items]
Total fair value of derivative assets	7	[1]	5	[1]
Total fair value of derivative liabilities	6.9	[1]	0.3	[1]
Designated As Hedging Instrument [Member] | Foreign Currency Forward Contracts - Non-Current [Member]
Derivative [Line Items]
Total fair value of derivative assets	1.4	[2]	0.5	[2]
Total fair value of derivative liabilities	0.7	[2]	0	[2]
Not Designated [Member]
Derivative [Line Items]
Total fair value of derivative assets	5.1		0.2
Total fair value of derivative liabilities	0.3		0.2
Not Designated [Member] | Foreign Currency Forward Contracts - Current [Member]
Derivative [Line Items]
Total fair value of derivative assets	5.1	[1]	0.2	[1]
Total fair value of derivative liabilities	$0.30	[1]	$0.20	[1]
[1]	Derivative assets and liabilities that have maturity dates equal to or less than twelve months from the respective balance sheet date were included in other current assets and accrued liabilities and other, respectively, on our condensed consolidated balance sheets.
[2]	Derivative assets and liabilities that have maturity dates greater than twelve months from the respective balance sheet date were included in other assets, net, and other liabilities, respectively, on our condensed consolidated balance sheets.

Derivative_Instruments_Gains_A

Derivative Instruments (Gains And Losses On Derivatives Designated As Cash Flow Hedges) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Interest Rate Lock Contracts [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)	$0	[1]	$0	[1]	$0	[1]	$0	[1]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	-0.1	[1],[2]	0.2	[1],[2]	-0.3	[1],[2]	0.4	[1],[2]
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	[1],[3]	0	[1],[3]	0	[1],[3]	0	[1],[3]
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)	8.3	[4]	4	[4]	-5.3	[5]	10.2	[5]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	-2.7	[2],[4]	0.1	[2],[4]	-1.9	[2],[5]	0.8	[2],[5]
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	1.2	[3],[4]	0.6	[3],[4]	-0.2	[3],[5]	0.8	[3],[5]
Foreign Currency Forward Contracts [Member] | Contract Drilling [Member]
Derivative [Line Items]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	-2.9				-2.5
Foreign Currency Forward Contracts [Member] | Depreciation Expense [Member]
Derivative [Line Items]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	0.2				0.6
Cash Flow Hedges [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") (Effective Portion)	8.3		4		-5.3		10.2
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)	-2.8	[2]	0.3	[2]	-2.2	[2]	1.2	[2]
Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$1.20	[3]	$0.60	[3]	($0.20)	[3]	$0.80	[3]
[1]	Gains and losses on interest rate lock derivatives reclassified from AOCI into income (effective portion) were included in interestB expense, netB in ourB condensed consolidated statements of income.
[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,B in our condensed consolidated statements of income.
[4]	During the three-month period ended SeptemberB 30, 2013, $2.9 million of losses were reclassified from AOCI into contract drilling expense and $200,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of income.
[5]	During the nine-month period ended SeptemberB 30, 2013, $2.5 million of losses were reclassified from AOCI into contract drilling expense and $600,000 of gains were reclassified from AOCI into depreciation expense in our condensed consolidated statement of income.

Noncontrolling_Interests_Detai

Noncontrolling Interests (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Noncontrolling Interest [Abstract]
Income from continuing operations	$381.40	$361.20	$1,064.80	$978.90
Income from continuing operations attributable to noncontrolling interests	-2.6	-1.9	-7.1	-5.3
INCOME FROM CONTINUING OPERATIONS	$378.80	$359.30	$1,057.70	$973.60

Earnings_Per_Share_Reconciliat

Earnings Per Share (Reconciliation Of Net Income Attributable To Ensco Shares) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Net income attributable to Ensco	$378.80	$343.50	$1,056.80	$950.20
Net income allocated to non-vested share awards	-4	-3.6	-11.2	-9.8
Net income attributable to Ensco shares	$374.80	$339.90	$1,045.60	$940.40

Earnings_Per_Share_Reconciliat1

Earnings Per Share (Reconciliation Of Weighted-Average Shares Used In Earnings Per Share Computations) (Details)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Weighted-average shares - basic (in shares)	231.1	229.6	230.8	229.2
Potentially dilutive share options (in shares)	0.2	0.3	0.2	0.3
Weighted-average shares - diluted (in shares)	231.3	229.9	231	229.5
Antidilutive share options excluded from computation of diluted earnings per share (in shares)			0.3	0.4

Debt_Details

Debt (Details) (Five-Year Credit Facility [Member], USD $)	0 Months Ended
	7-May-13	Sep. 30, 2013	Mar. 31, 2013
Debt Instrument [Line Items]
Current borrowing capacity	$2,000,000,000
Term of credit facility agreement	5 years
Maximum borrowing capacity	2,500,000,000	2,000,000,000	1,450,000,000
Undrawn facility fee	0.13%
364-Day Credit Facility [Member]
Debt Instrument [Line Items]
Term of credit facility agreement	364 days
Maximum borrowing capacity	$450,000,000
Maximum [Member]
Debt Instrument [Line Items]
Percentage of debt to total capitalization ratio	50.00%
Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.13%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.13%

ShareBased_Compensation_Detail

Share-Based Compensation (Details) (Restricted share awards and share unit awards [Member], USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Restricted share awards and share unit awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted	100,000	1,100,000
Vesting rate		20.00%
Vesting rate for certain officers and non-employee directors		33.00%
Weighted-average grant-date fair value of non-vested awards	$57.09	$59.70

Discontinued_Operations_Narrat

Discontinued Operations (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended			12 Months Ended		3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2012
					Jackup Rigs Member	Jackup Rigs Member	Moored Semisubmersible Rigs [Member]	Barge Rig Member	Barge Rig Member
						rigs	rigs		rigs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of rigs sold						3	1		1
Net proceeds from rig sale			$15.50		$54.50			$4.50
Gain (loss) on disposal of discontinued operations, net	0	-10.3	-1.1	2.5	12.8			-6.5
Impairment of Long-Lived Assets to be Disposed of	($3.80)

Discontinued_Operations_Summar

Discontinued Operations (Summary of Income From Discontinued Operations) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenues	$0	$0	$0	$6.70
Operating expenses	0	6.9	0.1	40.2
Operating loss before income taxes	0	-6.9	-0.1	-33.5
Other income	0	0.4	0.3	1.1
Income tax benefit	0	1	0	6.5
Gain (loss) on disposal of discontinued operations, net	0	-10.3	-1.1	2.5
Income (loss) from discontinued operations	$0	($15.80)	($0.90)	($23.40)

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Examination [Line Items]
Consolidated effective income tax rate including tax expense attributable to prior periods	16.10%		14.10%	11.50%
Consolidated effective income tax rate, without tax expense attributable to prior periods	15.60%	12.20%	13.20%	12.40%
Estimated Annual Effective Tax Rate			13.20%
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions			$4.90
Mexican Tax Authority [Member]
Income Tax Examination [Line Items]
Deferred Tax Liabilities, Gross			7.4
Proceeds from Income Tax Refunds	30.6

Contingencies_Narrative_Detail

Contingencies (Narrative) (Details) (USD $)	1 Months Ended	9 Months Ended	18 Months Ended			3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Mar. 31, 2009	Sep. 30, 2013	Dec. 31, 2011	Sep. 30, 2013
	payments	occurrence	claim		mi	Mexican Tax Authority [Member]	Mexican Tax Authority [Member]	Minimum [Member]
		claim	plaintiffs
		plaintiffs
Oil and Gas Delivery Commitments and Contracts [Line Items]
Payments for Legal Settlements							($43.70)
Distance from original drilling location in miles					95
Leg and debris removal costs	19
Number of payments related to leg and debris removal costs	9
Payments for leg and debris removal			14
Insurance reimbursements			13.6
Liability for remaining installments due to the customer		5	5	9
Receivable for recovery of related costs		5.4	5.4	13.2
Loss Contingency, Pending Claims, Number		3	3
Loss Contingency, Damages Sought, Value								5
Civil litigation claim damages for cost of repair and business interruption due to pipeline rupture		26	26
Liability insurance self-insured retention per occurrence		10	10
Annual liability coverage limit for wreckage and debris removal costs		500
Liability insurance self-insured retention		15	15
Number of Occurrences		2
Liability insurance self insured retention for each occurrence thereafter		1
Litigation Settlement, Amount						30.6
Number of plaintiffs		100	100
Letters of Credit Outstanding, Amount		$234	$234

Segment_Information_Narrative_

Segment Information (Narrative) (Details)	9 Months Ended
	Sep. 30, 2013
	segments
	contract
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Number of operating segments (in segments)	3
Number of reportable segments (in segments)	2
Number of drilling management contracts (in contracts)	2

Segment_Information_Schedule_O

Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$1,266,200,000	$1,123,500,000	$3,664,200,000	$3,215,200,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	619,200,000	507,300,000	1,786,800,000	1,503,500,000
Depreciation	153,300,000	142,400,000	455,200,000	414,700,000
General and administrative	37,400,000	40,200,000	111,600,000	113,900,000
OPERATING (LOSS) INCOME	456,300,000	433,600,000	1,310,600,000	1,183,100,000
Property and equipment, net	13,997,400,000	13,120,000,000	13,997,400,000	13,120,000,000	13,145,600,000
Floaters [Member]
Segment Reporting Information [Line Items]
Revenues	787,900,000	723,000,000	2,330,500,000	2,035,500,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	394,100,000	305,700,000	1,116,200,000	912,000,000
Depreciation	110,600,000	98,800,000	328,600,000	282,800,000
General and administrative	0	0	0	0
OPERATING (LOSS) INCOME	283,200,000	318,500,000	885,700,000	840,700,000
Property and equipment, net	11,252,800,000	10,706,300,000	11,252,800,000	10,706,300,000
Jackup [Member]
Segment Reporting Information [Line Items]
Revenues	459,600,000	380,800,000	1,274,500,000	1,117,200,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	210,000,000	187,200,000	623,800,000	545,600,000
Depreciation	41,100,000	41,900,000	121,800,000	124,700,000
General and administrative	0	0	0	0
OPERATING (LOSS) INCOME	208,500,000	151,700,000	528,900,000	446,900,000
Property and equipment, net	2,705,400,000	2,387,700,000	2,705,400,000	2,387,700,000
Other [Member]
Segment Reporting Information [Line Items]
Revenues	18,700,000	19,700,000	59,200,000	62,500,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	15,100,000	14,400,000	46,800,000	45,900,000
Depreciation	0	0	0	0
General and administrative	0	0	0	0
OPERATING (LOSS) INCOME	3,600,000	5,300,000	12,400,000	16,600,000
Property and equipment, net	0	0	0	0
Operating Segments Total [Member]
Segment Reporting Information [Line Items]
Revenues	1,266,200,000	1,123,500,000	3,664,200,000	3,215,200,000
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	619,200,000	507,300,000	1,786,800,000	1,503,500,000
Depreciation	151,700,000	140,700,000	450,400,000	407,500,000
General and administrative	0	0	0	0
OPERATING (LOSS) INCOME	495,300,000	475,500,000	1,427,000,000	1,304,200,000
Property and equipment, net	13,958,200,000	13,094,000,000	13,958,200,000	13,094,000,000
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating Expenses [Abstract]
Contract drilling (exclusive of depreciation)	0	0	0	0
Depreciation	1,600,000	1,700,000	4,800,000	7,200,000
General and administrative	37,400,000	40,200,000	111,600,000	113,900,000
OPERATING (LOSS) INCOME	-39,000,000	-41,900,000	-116,400,000	-121,100,000
Property and equipment, net	$39,200,000	$26,000,000	$39,200,000	$26,000,000

Segment_Information_Schedule_O1

Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)	Sep. 30, 2013
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	75	[1]
Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	29
Jackup [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	46
North & South America (Excl. Brazil) [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	22	[1]
North & South America (Excl. Brazil) [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	8
North & South America (Excl. Brazil) [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	14
Brazil [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	9	[1]
Brazil [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	9
Brazil [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	0
Europe & Mediterranean [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	10	[1]
Europe & Mediterranean [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	1
Europe & Mediterranean [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	9
Middle East & Africa [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	15	[1]
Middle East & Africa [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	6
Middle East & Africa [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	9
Asia & Pacific Rim [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	13	[1]
Asia & Pacific Rim [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	2
Asia & Pacific Rim [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	11
Asia & Pacific Rim (under construction) [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	6	[1]
Asia & Pacific Rim (under construction) [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	3
Asia & Pacific Rim (under construction) [Member] | Jackup [Member]
Segment Reporting Information [Line Items]
Number of contract drilling rigs (in rigs)	3
[1]	WeB provide management services on two rigs owned by third-partiesB notB included in theB table above.

Supplemental_Financial_Informa2

Supplemental Financial Information Supplemental Financial Information (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
US Gulf Of Mexico [Member] | Sales Revenue, Services, Net [Member] | Geographic Concentration Risk [Member]
Revenues	$447.20	$1,283.90
Concentration risk, percentage	35.00%	35.00%
US Gulf Of Mexico [Member] | Floaters [Member] | Sales Revenue, Services, Net [Member] | Geographic Concentration Risk [Member]
Concentration risk, percentage	76.00%	76.00%
Brazil [Member] | Sales Revenue, Services, Net [Member] | Geographic Concentration Risk [Member]
Revenues	236.5	748.2
Brazil [Member] | Floaters [Member] | Sales Revenue, Services, Net [Member] | Geographic Concentration Risk [Member]
Concentration risk, percentage	19.00%	20.00%
Petrobras [Member] | Sales Revenue, Services, Net [Member] | Product Concentration Risk [Member]
Revenues	207.7	623.3
Petrobras [Member] | Floaters [Member] | Sales Revenue, Services, Net [Member] | Product Concentration Risk [Member]
Concentration risk, percentage	16.00%	17.00%
OGX PetrC3leo e GC!s ParticipaC'C5es S.A. [Member]
Provision for Doubtful Accounts	11
Accounts Receivable, Net, Current	$3.60	$3.60

Supplemental_Financial_Informa3

Supplemental Financial Information (Accounts Receivable, Net) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	$800.80	$830.60
Allowance for doubtful accounts	-25.3	-19.2
Accounts receivable, net	775.5	811.4
Trade [Member]
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	790.2	812.4
Other [Member]
Supplemental Information For Property, Casualty Insurance Underwriters [Line Items]
Accounts receivable	$10.60	$18.20

Supplemental_Financial_Informa4

Supplemental Financial Information (Other Current Assets) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplemental Financial Information [Abstract]
Inventory	$239.80	$207.80
Prepaid taxes	70.9	62.2
Deferred costs	42.5	46.9
Prepaid expenses	21.3	20.3
Deferred tax assets	20.1	14.6
Derivative Asset, Current	12.1	5.2
Short-term Investments	0	50
Assets held for sale	0	14.2
Other	9.5	4.2
Other current assets	$416.20	$425.40

Supplemental_Financial_Informa5

Supplemental Financial Information (Other Assets, Net) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplemental Financial Information [Abstract]
Intangible assets	$92.60	$143.30
Unbilled receivables	59.7	77.1
Prepaid taxes on intercompany transfers of property	53.5	58.3
Deferred costs	37.8	45.2
Supplemental executive retirement plan assets	35.9	29.8
Warranty and other claim receivables	30.6	30.6
Deferred tax assets	27.5	19.3
Wreckage and debris removal receivables	5.4	13.2
Other	11.4	5
Other Assets, Net	$354.40	$421.80

Supplemental_Financial_Informa6

Supplemental Financial Information (Accrued Liabilities) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplemental Financial Information [Abstract]
Personnel costs	$220.50	$231.10
Deferred revenue	136	146.9
Taxes	91.8	86.9
Interest	34.8	67.9
Wreckage and debris removal	5	9
Other	30.3	42.6
Accrued liabilities and other	$518.40	$584.40

Supplemental_Financial_Informa7

Supplemental Financial Information (Other Liabilities) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplemental Financial Information [Abstract]
Deferred revenue	$200.80	$224.50
Unrecognized tax benefits (inclusive of interest and penalties)	135.3	129.6
Intangible liabilities	76.8	118
Supplemental executive retirement plan liabilities	39	33.3
Personnel costs	33.3	31.6
Other	30.2	36.4
Other liabilities	$515.40	$573.40

Supplemental_Financial_Informa8

Supplemental Financial Information (Accumulated Other Comprehensive Income) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplemental Financial Information [Abstract]
Derivative Instruments	$21.30	$24.40
Other	-3.8	-4.3
Accumulated other comprehensive income	$17.50	$20.10

Guarantee_Of_Registered_Securi2

Guarantee Of Registered Securities (Narrative) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Guarantor Obligations [Line Items]
Senior notes aggregate outstanding principal balance	1,700
8.50% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	8.50%
Senior note, maturity year	2019
6.875% Senior Notes due 2020 [Member]
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	6.88%
Senior note, maturity year	2020
7.875% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	7.88%
Senior note, maturity year	2040
7.20% Debentures Due 2027 [Member]
Guarantor Obligations [Line Items]
Debt instrument interest rate stated percentage	7.20%
Senior note, maturity year	2027
Senior notes aggregate outstanding principal balance	150

Guarantee_Of_Registered_Securi3

Guarantee Of Registered Securities (Condensed Consolidating Statements Of Income) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Guarantor Obligations [Line Items]
OPERATING REVENUES	$1,266,200,000	$1,123,500,000	$3,664,200,000	$3,215,200,000
Contract drilling (exclusive of depreciation)	619,200,000	507,300,000	1,786,800,000	1,503,500,000
Depreciation	153,300,000	142,400,000	455,200,000	414,700,000
General and administrative	37,400,000	40,200,000	111,600,000	113,900,000
OPERATING (LOSS) INCOME	456,300,000	433,600,000	1,310,600,000	1,183,100,000
OTHER INCOME (EXPENSE), NET	-1,600,000	-25,500,000	-71,200,000	-76,900,000
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	454,700,000	408,100,000	1,239,400,000	1,106,200,000
INCOME TAX PROVISION	73,300,000	46,900,000	174,600,000	127,300,000
DISCONTINUED OPERATIONS, NET	0	-15,800,000	-900,000	-23,400,000
NET INCOME	381,400,000	345,400,000	1,063,900,000	955,500,000
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	-2,600,000	-1,900,000	-7,100,000	-5,300,000
NET INCOME ATTRIBUTABLE TO ENSCO	378,800,000	343,500,000	1,056,800,000	950,200,000
Ensco Plc [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES	5,500,000	5,700,000	16,500,000	39,000,000
Contract drilling (exclusive of depreciation)	13,000,000	23,200,000	38,200,000	49,300,000
Depreciation		100,000	200,000	300,000
General and administrative	15,200,000	19,600,000	48,300,000	48,100,000
OPERATING (LOSS) INCOME	-22,700,000	-37,200,000	-70,200,000	-58,700,000
OTHER INCOME (EXPENSE), NET	-18,100,000	-11,300,000	-48,000,000	-31,400,000
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	-40,800,000	-48,500,000	-118,200,000	-90,100,000
DISCONTINUED OPERATIONS, NET			0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	419,600,000	392,000,000	1,175,000,000	1,040,300,000
NET INCOME	378,800,000	343,500,000	1,056,800,000	950,200,000
NET INCOME ATTRIBUTABLE TO ENSCO	378,800,000	343,500,000	1,056,800,000	950,200,000
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES	38,100,000	32,400,000	114,400,000	107,700,000
Contract drilling (exclusive of depreciation)	38,100,000	32,400,000	114,400,000	107,700,000
Depreciation	1,000,000	900,000	2,800,000	2,600,000
General and administrative	100,000	0	400,000	100,000
OPERATING (LOSS) INCOME	-1,100,000	-900,000	-3,200,000	-2,700,000
OTHER INCOME (EXPENSE), NET	5,900,000	0	-7,200,000	-5,900,000
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	4,800,000	-900,000	-10,400,000	-8,600,000
INCOME TAX PROVISION	16,200,000	13,000,000	76,900,000	45,900,000
DISCONTINUED OPERATIONS, NET			0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	65,200,000	95,000,000	255,700,000	220,600,000
NET INCOME	53,800,000	81,100,000	168,400,000	166,100,000
NET INCOME ATTRIBUTABLE TO ENSCO	53,800,000	81,100,000	168,400,000	166,100,000
Pride International, Inc. [Member]
Guarantor Obligations [Line Items]
OTHER INCOME (EXPENSE), NET	15,500,000	-12,400,000	-15,100,000	-39,000,000
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	15,500,000	-12,400,000	-15,100,000	-39,000,000
INCOME TAX PROVISION	0	-7,000,000	0	0
DISCONTINUED OPERATIONS, NET			0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	35,300,000	124,100,000	164,900,000	300,900,000
NET INCOME	50,800,000	118,700,000	149,800,000	261,900,000
NET INCOME ATTRIBUTABLE TO ENSCO	50,800,000	118,700,000	149,800,000	261,900,000
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES	1,300,200,000	1,162,100,000	3,766,200,000	3,314,500,000
Contract drilling (exclusive of depreciation)	645,700,000	528,400,000	1,867,100,000	1,592,500,000
Depreciation	152,300,000	141,400,000	452,200,000	411,800,000
General and administrative	22,100,000	20,600,000	62,900,000	65,700,000
OPERATING (LOSS) INCOME	480,100,000	471,700,000	1,384,000,000	1,244,500,000
OTHER INCOME (EXPENSE), NET	-4,900,000	-1,800,000	-900,000	-600,000
(LOSS) INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	475,200,000	469,900,000	1,383,100,000	1,243,900,000
INCOME TAX PROVISION	57,100,000	40,900,000	97,700,000	81,400,000
DISCONTINUED OPERATIONS, NET		-15,800,000	-900,000	-23,400,000
NET INCOME	418,100,000	413,200,000	1,284,500,000	1,139,100,000
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	-2,600,000	-1,900,000	-7,100,000	-5,300,000
NET INCOME ATTRIBUTABLE TO ENSCO	415,500,000	411,300,000	1,277,400,000	1,133,800,000
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
OPERATING REVENUES	-77,600,000	-76,700,000	-232,900,000	-246,000,000
Contract drilling (exclusive of depreciation)	-77,600,000	-76,700,000	-232,900,000	-246,000,000
DISCONTINUED OPERATIONS, NET			0
EQUITY EARNINGS IN AFFILIATES, NET OF TAX	-520,100,000	-611,100,000	-1,595,600,000	-1,561,800,000
NET INCOME	-520,100,000	-611,100,000	-1,595,600,000	-1,561,800,000
NET INCOME ATTRIBUTABLE TO ENSCO	($520,100,000)	($611,100,000)	($1,595,600,000)	($1,561,800,000)

Guarantee_Of_Registered_Securi4

Guarantee Of Registered Securities Guarantee Of Registered Securities (Condensed Consolidating Statements of Comprehensive Income) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
NET INCOME	$381.40	$345.40	$1,063.90	$955.50
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	8.3	4	-5.3	10.2
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	2.8	-0.3	2.2	-1.2
Other			0.5	-1.5
NET OTHER COMPREHENSIVE (LOSS) INCOME	11.1	3.7	-2.6	7.5
COMPREHENSIVE INCOME	392.5	349.1	1,061.30	963
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	-2.6	-1.9	-7.1	-5.3
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	389.9	347.2	1,054.20	957.7
Ensco Plc [Member]
NET INCOME	378.8	343.5	1,056.80	950.2
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	378.8	343.5	1,056.80	950.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	378.8	343.5	1,056.80	950.2
ENSCO International Inc. [Member]
NET INCOME	53.8	81.1	168.4	166.1
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	8.3	2.7	-5.3	5.5
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	2.8	0.1	2.2	0.2
NET OTHER COMPREHENSIVE (LOSS) INCOME	11.1	2.8	-3	5.7
COMPREHENSIVE INCOME	64.9	83.9	165.3	171.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	64.9	83.9	165.3	171.8
Pride International, Inc. [Member]
NET INCOME	50.8	118.7	149.8	261.9
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	50.8	118.7	149.8	261.9
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	50.8	118.7	149.8	261.9
Other Non-Guarantor Subsidiaries Of Ensco [Member]
NET INCOME	418.1	413.2	1,284.50	1,139.10
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	0	1.3	0	4.7
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	0	-0.4	0	-1.4
Other			0.5	-1.5
NET OTHER COMPREHENSIVE (LOSS) INCOME	0	0.9	1	1.8
COMPREHENSIVE INCOME	418.1	414.1	1,285	1,140.90
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	-2.6	-1.9	-7.1	-5.3
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	415.5	412.2	1,277.90	1,135.60
Consolidating Adjustments [Member]
NET INCOME	-520.1	-611.1	-1,595.60	-1,561.80
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	-520.1	-611.1	-1,595.60	-1,561.80
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	($520.10)	($611.10)	($1,595.60)	($1,561.80)

Guarantee_Of_Registered_Securi5

Guarantee Of Registered Securities (Condensed Consolidating Balance Sheets) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Guarantor Obligations [Line Items]
Cash and cash equivalents	$325.40	$487.10	$159.80	$430.70
Accounts receivable, net	775.5	811.4
Other	416.2	425.4
Total current assets	1,517.10	1,723.90
PROPERTY AND EQUIPMENT, AT COST	17,033.40	15,737.10
Less accumulated depreciation	3,036	2,591.50
Property and equipment, net	13,997.40	13,145.60	13,120
GOODWILL	3,274	3,274
OTHER ASSETS, NET	354.4	421.8
TOTAL ASSETS	19,142.90	18,565.30
Accounts payable and accrued liabilities	893	942.2
Current maturities of long-term debt	47.5	47.5
Total current liabilities	940.5	989.7
LONG-TERM DEBT	4,743.60	4,798.40
DEFERRED INCOME TAXES	340.8	351.7
OTHER LIABILITIES	515.4	573.4
ENSCO SHAREHOLDERS' EQUITY	12,593.10	11,846.40
NONCONTROLLING INTERESTS	9.5	5.7
Total equity	12,602.60	11,852.10
Total liabilities and shareholders' equity	19,142.90	18,565.30
Ensco Plc [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	145.3	271.8	43.2	236.6
Accounts receivable from affiliates	1,307.20	1,294.50
Other	3.2	2.8
Total current assets	1,455.70	1,569.10
PROPERTY AND EQUIPMENT, AT COST	2.1	2.1
Less accumulated depreciation	1.4	1.1
Property and equipment, net	0.7	1
DUE FROM AFFILIATES	3,473.50	3,483.50
INVESTMENTS IN AFFILIATES	14,429.20	13,469.30
OTHER ASSETS, NET	9.5	11.3
TOTAL ASSETS	19,368.60	18,534.20
Accounts payable and accrued liabilities	6.4	31
Accounts payable to affiliates	3,460.30	2,364.80
Total current liabilities	3,466.70	2,395.80
DUE TO AFFILIATES	826.6	1,816.70
LONG-TERM DEBT	2,472.70	2,469.60
OTHER LIABILITIES	0	0
ENSCO SHAREHOLDERS' EQUITY	12,602.60	11,852.10
Total equity	12,602.60	11,852.10
Total liabilities and shareholders' equity	19,368.60	18,534.20
ENSCO International Inc. [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	0.4	1.7	2.2	0
Accounts receivable, net	0	0.2
Accounts receivable from affiliates	197.3	226.5
Other	41	24.9
Total current assets	238.7	253.3
PROPERTY AND EQUIPMENT, AT COST	34	30.2
Less accumulated depreciation	25.3	23.5
Property and equipment, net	8.7	6.7
DUE FROM AFFILIATES	3,996.20	3,594.70
INVESTMENTS IN AFFILIATES	2,949.40	2,693.80
OTHER ASSETS, NET	64.1	67.4
TOTAL ASSETS	7,257.10	6,615.90
Accounts payable and accrued liabilities	38.2	28.1
Accounts payable to affiliates	132.7	136.9
Total current liabilities	170.9	165
DUE TO AFFILIATES	2,518.20	2,054.70
LONG-TERM DEBT	149.1	149
DEFERRED INCOME TAXES	309.4	335.1
OTHER LIABILITIES	2.4	0
ENSCO SHAREHOLDERS' EQUITY	4,107.10	3,912.10
Total equity	4,107.10	3,912.10
Total liabilities and shareholders' equity	7,257.10	6,615.90
Pride International, Inc. [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	12.1	85	10.7	22.6
Accounts receivable, net	0	0
Accounts receivable from affiliates	4.2	0
Other	3.1
Total current assets	19.4	85
DUE FROM AFFILIATES	1,913.30	1,628.40
INVESTMENTS IN AFFILIATES	3,948.70	3,824.80
TOTAL ASSETS	5,881.40	5,538.20
Accounts payable and accrued liabilities	23.4	34.1
Accounts payable to affiliates	0	0
Total current liabilities	23.4	34.1
DUE TO AFFILIATES	1,148.70	877.5
LONG-TERM DEBT	2,016.20	2,040.80
OTHER LIABILITIES	9.4	10.8
ENSCO SHAREHOLDERS' EQUITY	2,683.70	2,575
Total equity	2,683.70	2,575
Total liabilities and shareholders' equity	5,881.40	5,538.20
Other Non-Guarantor Subsidiaries Of Ensco [Member]
Guarantor Obligations [Line Items]
Cash and cash equivalents	167.6	128.6	103.7	171.5
Accounts receivable, net	775.5	811.2
Accounts receivable from affiliates	3,547.40	2,375.10
Other	368.9	397.7
Total current assets	4,859.40	3,712.60
PROPERTY AND EQUIPMENT, AT COST	16,997.30	15,704.80
Less accumulated depreciation	3,009.30	2,566.90
Property and equipment, net	13,988	13,137.90
GOODWILL	3,274	3,274
DUE FROM AFFILIATES	4,442	4,748.90
OTHER ASSETS, NET	280.8	343.1
TOTAL ASSETS	26,844.20	25,216.50
Accounts payable and accrued liabilities	825	849
Accounts payable to affiliates	1,463.10	1,394.40
Current maturities of long-term debt	47.5	47.5
Total current liabilities	2,335.60	2,290.90
DUE TO AFFILIATES	9,331.50	8,706.60
LONG-TERM DEBT	105.6	139
DEFERRED INCOME TAXES	31.4	16.6
OTHER LIABILITIES	503.6	562.6
ENSCO SHAREHOLDERS' EQUITY	14,527	13,495.10
NONCONTROLLING INTERESTS	9.5	5.7
Total equity	14,536.50	13,500.80
Total liabilities and shareholders' equity	26,844.20	25,216.50
Consolidating Adjustments [Member]
Guarantor Obligations [Line Items]
Accounts receivable from affiliates	-5,056.10	-3,896.10
Total current assets	-5,056.10	-3,896.10
DUE FROM AFFILIATES	-13,825	-13,455.50
INVESTMENTS IN AFFILIATES	-21,327.30	-19,987.90
TOTAL ASSETS	-40,208.40	-37,339.50
Accounts payable to affiliates	-5,056.10	-3,896.10
Total current liabilities	-5,056.10	-3,896.10
DUE TO AFFILIATES	-13,825	-13,455.50
ENSCO SHAREHOLDERS' EQUITY	-21,327.30	-19,987.90
Total equity	-21,327.30	-19,987.90
Total liabilities and shareholders' equity	($40,208.40)	($37,339.50)

Guarantee_Of_Registered_Securi6

Guarantee Of Registered Securities (Condensed Consolidating Statements Of Cash Flows) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	$1,432.40	$1,596.60
INVESTING ACTIVITIES
Additions to property and equipment	-1,282.70	-1,583.80
Maturities of short-term investments	50	4.5
Other	3.8	3.4
Net cash provided by (used in) investing activities of continuing operations	-1,228.90	-1,575.90
FINANCING ACTIVITIES
Cash dividends paid	-350.2	-260.9
Commercial paper borrowings, net	0	-125
Reimbursement of equity issuance cost	0	66.7
Reduction of long-term borrowings	-30.9	-30.9
Proceeds from exercise of share options	22	22.1
Advances from (to) affiliates		0
Other	-20.8	-15.4
Net cash provided by (used in) financing activities	-379.9	-343.4
DISCONTINUED OPERATIONS
Operating activities	0.2	-9.1
Investing activities	15.5	59
Net cash provided by discontinued operations	15.7	49.9
Effect of exchange rate changes on cash and cash equivalents	-1	1.9
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-161.7	-270.9
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	487.1	430.7
CASH AND CASH EQUIVALENTS, END OF PERIOD	325.4	159.8
Ensco Plc [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	-138	-83.3
FINANCING ACTIVITIES
Cash dividends paid	-350.2	-260.9
Commercial paper borrowings, net		-125
Reimbursement of equity issuance cost		66.7
Proceeds from exercise of share options	22	10.2
Advances from (to) affiliates	353.2	210.2
Other	-13.5	-11.3
Net cash provided by (used in) financing activities	11.5	-110.1
DISCONTINUED OPERATIONS
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-126.5	-193.4
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	271.8	236.6
CASH AND CASH EQUIVALENTS, END OF PERIOD	145.3	43.2
ENSCO International Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	-114.3	-45.1
INVESTING ACTIVITIES
Additions to property and equipment	0	0
Other	-3.8	0.5
Net cash provided by (used in) investing activities of continuing operations	-3.8	0.5
FINANCING ACTIVITIES
Proceeds from exercise of share options		11.9
Advances from (to) affiliates	121.3	34.9
Other	-4.5
Net cash provided by (used in) financing activities	116.8	46.8
DISCONTINUED OPERATIONS
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-1.3	2.2
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1.7	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	0.4	2.2
Pride International, Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	-54.1	-12.8
FINANCING ACTIVITIES
Advances from (to) affiliates	-18.8	0.9
Net cash provided by (used in) financing activities	-18.8	0.9
DISCONTINUED OPERATIONS
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-72.9	-11.9
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	85	22.6
CASH AND CASH EQUIVALENTS, END OF PERIOD	12.1	10.7
Other Non-Guarantor Subsidiaries Of Ensco [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities of continuing operations	1,738.80	1,737.80
INVESTING ACTIVITIES
Additions to property and equipment	-1,282.70	-1,583.80
Maturities of short-term investments	50	4.5
Other	7.6	2.9
Net cash provided by (used in) investing activities of continuing operations	-1,225.10	-1,576.40
FINANCING ACTIVITIES
Reduction of long-term borrowings	-30.9	-30.9
Advances from (to) affiliates	-455.7	-246
Other	-2.8	-4.1
Net cash provided by (used in) financing activities	-489.4	-281
DISCONTINUED OPERATIONS
Operating activities	0.2	-9.1
Investing activities	15.5	59
Net cash provided by discontinued operations	15.7	49.9
Effect of exchange rate changes on cash and cash equivalents	-1	1.9
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	39	-67.8
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	128.6	171.5
CASH AND CASH EQUIVALENTS, END OF PERIOD	$167.60	$103.70