Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES
Net income	$ (3,888.5)us-gaap_ProfitLoss	$ 1,427.9us-gaap_ProfitLoss	$ 1,176.7us-gaap_ProfitLoss
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Discontinued operations, net	1,199.2	2.2	(100.6)
Asset Impairment Charges	4,218.7us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges
Cost of Services, Depreciation	537.9us-gaap_CostOfServicesDepreciation	496.2us-gaap_CostOfServicesDepreciation	443.8us-gaap_CostOfServicesDepreciation
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Share-based compensation expense	45.1us-gaap_ShareBasedCompensation	50.3us-gaap_ShareBasedCompensation	53.2us-gaap_ShareBasedCompensation
Amortization of intangibles and other, net	(7.9)	(28.4)	(33.6)
Deferred income tax expense (benefit)	(123.5)us-gaap_DeferredIncomeTaxExpenseBenefit	10.1us-gaap_DeferredIncomeTaxExpenseBenefit	27.8us-gaap_DeferredIncomeTaxExpenseBenefit
Other	(16.4)us-gaap_OtherNoncashIncomeExpense	15.0us-gaap_OtherNoncashIncomeExpense	6.0us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities	93.3	(151.1)	439.2
Net cash provided by operating activities of continuing operations	2,057.9	1,811.2	1,954.6
INVESTING ACTIVITIES
Additions to property and equipment	(1,568.8)	(1,763.5)	(1,713.2)
Purchases of short-term investments	(790.6)	(50.0)	(90.0)
Proceeds from Sale of Property, Plant, and Equipment	169.2	6.0	3.2
Maturities of short-term investments	83.3	50.0	44.5
Net cash used in investing activities of continuing operations	(2,106.9)	(1,757.5)	(1,755.5)
FINANCING ACTIVITIES
Cash dividends paid	(703.0)us-gaap_PaymentsOfDividendsCommonStock	(525.6)us-gaap_PaymentsOfDividendsCommonStock	(348.1)us-gaap_PaymentsOfDividendsCommonStock
Reduction of long-term borrowings	(60.1)us-gaap_RepaymentsOfLongTermDebt	(47.5)us-gaap_RepaymentsOfLongTermDebt	(47.5)us-gaap_RepaymentsOfLongTermDebt
Proceeds from exercise of share options	2.6	22.3	35.8
Debt financing costs	(13.4)us-gaap_PaymentsOfDebtIssuanceCosts	(4.6)us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts
Commercial paper borrowings, net	0	0	(125.0)
Equity financing costs	0us-gaap_PaymentsOfStockIssuanceCosts	0us-gaap_PaymentsOfStockIssuanceCosts	66.7us-gaap_PaymentsOfStockIssuanceCosts
Proceeds from issuance of senior notes	1,246.4	0	0
Other	(29.8)	(21.7)	(17.4)
Net cash (used in) provided by financing activities of continuing operations	442.7	(577.1)	(435.5)
DISCONTINUED OPERATIONS
Operating activities	(3.8)	169.3	232.5
Investing activities	109.3	32.8	58.3
Net Cash Provided by (Used in) Discontinued Operations	105.5	202.1	290.8
Effect of exchange rate changes on cash and cash equivalents	0	(0.2)	2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	499.2	(321.5)	56.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	165.6	487.1	430.7
CASH AND CASH EQUIVALENTS, END OF YEAR	664.8	165.6	487.1
Ensco Plc [Member]
OPERATING ACTIVITIES
Net income	(3,902.6)	1,418.2	1,169.7
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0	0	0
Asset Impairment Charges	0
Cost of Services, Depreciation	0.2	0.3	0.4
Net cash provided by operating activities of continuing operations	(63.8)	(114.8)	(71.6)
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	(716.1)	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	(0.3)
Maturities of short-term investments	0	0	0
FINANCING ACTIVITIES
Cash dividends paid	(703.0)	(525.6)	(348.1)
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	2.6	22.3	23.9
Debt financing costs	(13.4)	0
Commercial paper borrowings, net			(125.0)
Equity financing costs			66.7
Proceeds from issuance of senior notes	1,246.4
Other	(13.7)	(14.4)	(11.6)
Net cash (used in) provided by financing activities of continuing operations	1,020.8	(110.5)	107.1
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net Cash Provided by (Used in) Discontinued Operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	240.9	(225.3)	35.2
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	46.5	271.8	236.6
CASH AND CASH EQUIVALENTS, END OF YEAR	287.4	46.5	271.8
Ensco International Inc [Member]
OPERATING ACTIVITIES
Net income	(3,657.4)	259.8	256.2
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0	0	0
Asset Impairment Charges	0
Cost of Services, Depreciation	7.6	4.0	3.5
Net cash provided by operating activities of continuing operations	(167.6)	(128.7)	(38.2)
INVESTING ACTIVITIES
Additions to property and equipment	(37.2)	0	0
Purchases of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	(4.1)	0.4
Maturities of short-term investments	0	0	0
FINANCING ACTIVITIES
Cash dividends paid	0	0	0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	11.9
Debt financing costs	0	(4.6)
Commercial paper borrowings, net			0
Equity financing costs			0
Proceeds from issuance of senior notes	0
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	204.3	131.6	39.5
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net Cash Provided by (Used in) Discontinued Operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(0.5)	(1.2)	1.7
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	0.5	1.7	0
CASH AND CASH EQUIVALENTS, END OF YEAR	0	0.5	1.7
Pride International Inc Member
OPERATING ACTIVITIES
Net income	(3,799.0)	83.7	189.2
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0	0	0
Asset Impairment Charges	0
Cost of Services, Depreciation	0	0	0
Net cash provided by operating activities of continuing operations	(90.9)	(62.9)	(21.6)
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	0
Maturities of short-term investments	0	0	0
FINANCING ACTIVITIES
Cash dividends paid	0	0	0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Proceeds from issuance of senior notes	0
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	176.8	(17.2)	84.0
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net Cash Provided by (Used in) Discontinued Operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	85.9	(80.1)	62.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4.9	85.0	22.6
CASH AND CASH EQUIVALENTS, END OF YEAR	90.8	4.9	85.0
Other Non Guarantor Subsidiaries Member
OPERATING ACTIVITIES
Net income	(3,710.9)	1,684.1	1,419.6
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	1,199.2	2.2	(100.6)
Asset Impairment Charges	4,218.7
Cost of Services, Depreciation	530.1	491.9	439.9
Net cash provided by operating activities of continuing operations	2,380.2	2,117.6	2,086.0
INVESTING ACTIVITIES
Additions to property and equipment	(1,531.6)	(1,763.5)	(1,713.2)
Purchases of short-term investments	(74.5)	(50.0)	(90.0)
Proceeds from Sale of Property, Plant, and Equipment	169.2	10.1	3.1
Maturities of short-term investments	83.3	50.0	44.5
FINANCING ACTIVITIES
Cash dividends paid	0	0	0
Reduction of long-term borrowings	(60.1)	(47.5)	(47.5)
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Proceeds from issuance of senior notes	0
Other	(16.1)	(7.3)	(5.8)
Net cash (used in) provided by financing activities of continuing operations	(959.2)	(581.0)	(666.1)
DISCONTINUED OPERATIONS
Operating activities	(3.8)	169.3	232.5
Investing activities	109.3	32.8	58.3
Net Cash Provided by (Used in) Discontinued Operations	105.5	202.1	290.8
Effect of exchange rate changes on cash and cash equivalents	0	(0.2)	2.0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	172.9	(14.9)	(42.9)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	113.7	128.6	171.5
CASH AND CASH EQUIVALENTS, END OF YEAR	286.6	113.7	128.6
Consolidated Adjustments Member
OPERATING ACTIVITIES
Net income	11,181.4	(2,017.9)	(1,858.0)
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations, net	0	0
Asset Impairment Charges	0
Cost of Services, Depreciation	0	0	0
Net cash provided by operating activities of continuing operations	0	0	0
INVESTING ACTIVITIES
Additions to property and equipment	0	0	0
Purchases of short-term investments	0	0	0
Proceeds from Sale of Property, Plant, and Equipment	0	0	0
Maturities of short-term investments	0	0	0
FINANCING ACTIVITIES
Cash dividends paid	0	0	0
Reduction of long-term borrowings	0	0	0
Proceeds from exercise of share options	0	0	0
Debt financing costs	0	0
Commercial paper borrowings, net			0
Equity financing costs			0
Proceeds from issuance of senior notes	0
Other	0	0	0
Net cash (used in) provided by financing activities of continuing operations	0	0	0
DISCONTINUED OPERATIONS
Operating activities	0	0	0
Investing activities	0	0	0
Net Cash Provided by (Used in) Discontinued Operations	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	0	0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	0	0	0
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 0	$ 0	$ 0

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