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Guarantee Of Registered Securities (Condensed Consolidating Balance Sheets) (Details) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Guarantor Obligations [Line Items] |  |  |  |
Cash and cash equivalents | $ 648.3 | $ 664.8 | $ 145.0 | $ 165.6
Short-term Investments | 650.0 | 757.3 |  |
Accounts receivable, net | 714.4 | 883.3 |  |
Other | 627.9 | 629.4 |  |
Total current assets | 2,640.6 | 2,934.8 |  |
PROPERTY AND EQUIPMENT, AT COST | 15,886.8 | 14,975.5 |  |
Less accumulated depreciation | 2,716.9 | 2,440.7 |  |
Property and equipment, net | 13,169.9 | 12,534.8 | 12,881.2 |
Goodwill | 276.1 | 276.1 |  |
OTHER ASSETS, NET | 251.5 | 314.2 |  |
TOTAL ASSETS | 16,338.1 | 16,059.9 |  |
Accounts payable and accrued liabilities | 913.9 | 1,069.8 |  |
Current maturities of long-term debt | 14.4 | 34.8 |  |
Total current liabilities | 928.3 | 1,104.6 |  |
LONG-TERM DEBT | 5,911.3 | 5,885.6 |  |
DEFERRED INCOME TAXES | 210.0 | 179.5 |  |
OTHER LIABILITIES | 526.6 | 667.3 |  |
ENSCO SHAREHOLDERS' EQUITY | 8,750.6 | 8,215.0 |  |
NONCONTROLLING INTERESTS | 11.3 | 7.9 |  |
Total equity | 8,761.9 | 8,222.9 |  |
Total liabilities and shareholders' equity | 16,338.1 | 16,059.9 |  |
Ensco Plc [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Cash and cash equivalents | 334.6 | 287.4 | 37.1 | 46.5
Short-term Investments | 650.0 | 712.0 |  |
Accounts receivable, net | 0.0 |  |  |
Accounts receivable from affiliates | 17.4 | 34.5 |  |
Other | 0.2 | 4.1 |  |
Total current assets | 1,002.2 | 1,038.0 |  |
PROPERTY AND EQUIPMENT, AT COST | 2.1 | 2.1 |  |
Less accumulated depreciation | 1.8 | 1.7 |  |
Property and equipment, net | 0.3 | 0.4 |  |
Goodwill | 0.0 | 0.0 |  |
DUE FROM AFFILIATES | 3,022.7 | 2,873.2 |  |
INVESTMENTS IN AFFILIATES | 9,817.6 | 9,084.8 |  |
OTHER ASSETS, NET | 27.6 | 17.0 |  |
TOTAL ASSETS | 13,870.4 | 13,013.4 |  |
Accounts payable and accrued liabilities | 56.0 | 47.8 |  |
Accounts payable to affiliates | 9.4 | 23.5 |  |
Total current liabilities | 65.4 | 71.3 |  |
DUE TO AFFILIATES | 1,236.6 | 994.8 |  |
LONG-TERM DEBT | 3,806.7 | 3,724.4 |  |
DEFERRED INCOME TAXES | 0.0 |  |  |
ENSCO SHAREHOLDERS' EQUITY | 8,761.7 | 8,222.9 |  |
Total equity | 8,761.7 | 8,222.9 |  |
Total liabilities and shareholders' equity | 13,870.4 | 13,013.4 |  |
ENSCO International Inc. [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Cash and cash equivalents | 0.0 | 0.0 | 0.0 | 0.5
Short-term Investments | 0.0 | 0.0 |  |
Accounts receivable, net | 0.0 |  |  |
Accounts receivable from affiliates | 143.1 | 210.4 |  |
Other | 74.0 | 86.9 |  |
Total current assets | 217.1 | 297.3 |  |
PROPERTY AND EQUIPMENT, AT COST | 76.6 | 71.5 |  |
Less accumulated depreciation | 38.9 | 34.1 |  |
Property and equipment, net | 37.7 | 37.4 |  |
Goodwill | 0.0 |  |  |
DUE FROM AFFILIATES | 5,421.2 | 4,748.2 |  |
INVESTMENTS IN AFFILIATES | 1,327.1 | 1,233.5 |  |
OTHER ASSETS, NET | 46.1 | 47.4 |  |
TOTAL ASSETS | 7,049.2 | 6,363.8 |  |
Accounts payable and accrued liabilities | 25.8 | 42.8 |  |
Accounts payable to affiliates | 82.1 | 158.3 |  |
Total current liabilities | 107.9 | 201.1 |  |
DUE TO AFFILIATES | 4,502.6 | 3,817.4 |  |
LONG-TERM DEBT | 149.2 | 149.2 |  |
DEFERRED INCOME TAXES | 202.6 | 176.8 |  |
OTHER LIABILITIES | 4.4 | 6.1 |  |
ENSCO SHAREHOLDERS' EQUITY | 2,082.5 | 2,013.2 |  |
Total equity | 2,082.5 | 2,013.2 |  |
Total liabilities and shareholders' equity | 7,049.2 | 6,363.8 |  |
Pride International, Inc. [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Cash and cash equivalents | 104.4 | 90.8 | 5.3 | 4.9
Short-term Investments | 0.0 | 0.0 |  |
Accounts receivable, net | 0.0 |  |  |
Accounts receivable from affiliates | 0.0 | 0.0 |  |
Total current assets | 104.4 | 90.8 |  |
Goodwill | 0.0 | 0.0 |  |
DUE FROM AFFILIATES | 1,978.8 | 1,835.0 |  |
INVESTMENTS IN AFFILIATES | 595.4 | 461.6 |  |
TOTAL ASSETS | 2,678.6 | 2,387.4 |  |
Accounts payable and accrued liabilities | 34.1 | 34.3 |  |
Total current liabilities | 34.1 | 34.3 |  |
DUE TO AFFILIATES | 1,752.7 | 1,547.7 |  |
LONG-TERM DEBT | 1,955.4 | 1,973.2 |  |
OTHER LIABILITIES | 6.2 | 7.0 |  |
ENSCO SHAREHOLDERS' EQUITY | (1,069.8) | (1,174.8) |  |
Total equity | (1,069.8) | (1,174.8) |  |
Total liabilities and shareholders' equity | 2,678.6 | 2,387.4 |  |
Other Non-Guarantor Subsidiaries Of Ensco [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Cash and cash equivalents | 209.3 | 286.6 | $ 102.6 | $ 113.7
Short-term Investments | 0.0 | 45.3 |  |
Accounts receivable, net | 714.4 | 883.3 |  |
Accounts receivable from affiliates | 68.6 | 134.6 |  |
Other | 553.7 | 538.4 |  |
Total current assets | 1,546.0 | 1,888.2 |  |
PROPERTY AND EQUIPMENT, AT COST | 15,808.1 | 14,901.9 |  |
Less accumulated depreciation | 2,676.2 | 2,404.9 |  |
Property and equipment, net | 13,131.9 | 12,497.0 |  |
Goodwill | 276.1 | 276.1 |  |
DUE FROM AFFILIATES | 7,443.9 | 6,308.8 |  |
OTHER ASSETS, NET | 177.8 | 249.8 |  |
TOTAL ASSETS | 22,575.7 | 21,219.9 |  |
Accounts payable and accrued liabilities | 798.0 | 944.9 |  |
Accounts payable to affiliates | 137.6 | 197.7 |  |
Current maturities of long-term debt | 14.4 | 34.8 |  |
Total current liabilities | 950.0 | 1,177.4 |  |
DUE TO AFFILIATES | 10,374.7 | 9,405.3 |  |
LONG-TERM DEBT | 0.0 | 38.8 |  |
DEFERRED INCOME TAXES | 7.4 | 2.7 |  |
OTHER LIABILITIES | 516.0 | 654.2 |  |
ENSCO SHAREHOLDERS' EQUITY | 10,716.3 | 9,933.6 |  |
NONCONTROLLING INTERESTS | 11.3 | 7.9 |  |
Total equity | 10,727.6 | 9,941.5 |  |
Total liabilities and shareholders' equity | 22,575.7 | 21,219.9 |  |
Consolidating Adjustments [Member] |  |  |  |
Guarantor Obligations [Line Items] |  |  |  |
Short-term Investments | 0.0 | 0.0 |  |
Accounts receivable, net | 0.0 |  |  |
Accounts receivable from affiliates | (229.1) | (379.5) |  |
Total current assets | (229.1) | (379.5) |  |
Goodwill | 0.0 | 0.0 |  |
DUE FROM AFFILIATES | (17,866.6) | (15,765.2) |  |
INVESTMENTS IN AFFILIATES | (11,740.1) | (10,779.9) |  |
TOTAL ASSETS | (29,835.8) | (26,924.6) |  |
Accounts payable to affiliates | (229.1) | (379.5) |  |
Total current liabilities | (229.1) | (379.5) |  |
DUE TO AFFILIATES | (17,866.6) | (15,765.2) |  |
ENSCO SHAREHOLDERS' EQUITY | (11,740.1) | (10,779.9) |  |
Total equity | (11,740.1) | (10,779.9) |  |
Total liabilities and shareholders' equity | $ (29,835.8) | $ (26,924.6) |  |

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