v2.3.0.15
Guarantee Of Registered Securities (Condensed Consolidating Statements Of Cash Flows) (Details) (USD $)
In Millions
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Guarantor Obligations [Line Items]  
Net cash (used in) provided by operating activities of continuing operations$ 402.0$ 521.4
Acquisition of Pride International, Inc., net of cash acquired(2,656.0) 
Additions to property and equipment(498.4)(737.5)
Proceeds from disposal of discontinued operations 132.4
Proceeds from disposition of assets46.11.1
Other(4.5) 
Net cash used in investing activities(3,112.8)(604.0)
Cash dividends paid(211.4)(103.6)
Proceeds from issuance of senior notes2,462.8 
Reduction of long-term borrowings(196.7)(8.6)
Commercial paper borrowings, net175.0 
Equity financing costs(70.5) 
Debt financing costs(31.9)(6.2)
Other13.4(13.0)
Net cash provided by (used in) financing activities2,140.7(131.4)
Effect of exchange rate changes on cash and cash equivalents(0.7)(0.5)
Net cash provided by operating activities of discontinued operations (21.7)
DECREASE IN CASH AND CASH EQUIVALENTS(570.8)(236.2)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD1,050.71,141.4
CASH AND CASH EQUIVALENTS, END OF PERIOD479.9905.2
Ensco Plc [Member]
  
Guarantor Obligations [Line Items]  
Net cash (used in) provided by operating activities of continuing operations18.2(1.1)
Additions to property and equipment (1.8)
Proceeds from disposal of discontinued operations  
Proceeds from disposition of assets  
Net cash used in investing activities (1.8)
Cash dividends paid(211.4)(103.6)
Proceeds from issuance of senior notes2,462.8 
Commercial paper borrowings, net175.0 
Equity financing costs(70.5) 
Debt financing costs(27.2) 
Advances (to) from affiliates(2,216.5)92.5
Other(9.6)(5.8)
Net cash provided by (used in) financing activities102.6(16.9)
Net cash provided by operating activities of discontinued operations  
DECREASE IN CASH AND CASH EQUIVALENTS120.8(19.8)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD3.424.8
CASH AND CASH EQUIVALENTS, END OF PERIOD124.25.0
ENSCO International Inc. [Member]
  
Guarantor Obligations [Line Items]  
Net cash (used in) provided by operating activities of continuing operations(34.4)4.5
Additions to property and equipment(4.8) 
Proceeds from disposal of discontinued operations  
Proceeds from disposition of assets  
Net cash used in investing activities(4.8) 
Cash dividends paid  
Reduction of long-term borrowings  
Debt financing costs(4.7)(6.2)
Advances (to) from affiliates53.5(126.8)
Other (0.8)
Net cash provided by (used in) financing activities48.8(133.8)
Effect of exchange rate changes on cash and cash equivalents  
Net cash provided by operating activities of discontinued operations (14.3)
DECREASE IN CASH AND CASH EQUIVALENTS9.6(143.6)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD19.1277.8
CASH AND CASH EQUIVALENTS, END OF PERIOD28.7134.2
Pride International Inc [Member]
  
Guarantor Obligations [Line Items]  
Net cash (used in) provided by operating activities of continuing operations(49.0) 
Acquisition of Pride International, Inc., net of cash acquired92.9 
Net cash used in investing activities92.9 
Reduction of long-term borrowings(181.0) 
Advances (to) from affiliates167.3 
Net cash provided by (used in) financing activities(13.7) 
DECREASE IN CASH AND CASH EQUIVALENTS30.2 
CASH AND CASH EQUIVALENTS, END OF PERIOD30.2 
Other Non-Guarantor Subsidiaries Of Ensco [Member]
  
Guarantor Obligations [Line Items]  
Net cash (used in) provided by operating activities of continuing operations467.2518.0
Acquisition of Pride International, Inc., net of cash acquired(2,748.9) 
Additions to property and equipment(493.6)(735.7)
Proceeds from disposal of discontinued operations 132.4
Proceeds from disposition of assets46.11.1
Other(4.5) 
Net cash used in investing activities(3,200.9)(602.2)
Cash dividends paid  
Reduction of long-term borrowings(15.7)(8.6)
Advances (to) from affiliates1,995.734.3
Other23.0(6.4)
Net cash provided by (used in) financing activities2,003.019.3
Effect of exchange rate changes on cash and cash equivalents(0.7)(0.5)
Net cash provided by operating activities of discontinued operations (7.4)
DECREASE IN CASH AND CASH EQUIVALENTS(731.4)(72.8)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD1,028.2838.8
CASH AND CASH EQUIVALENTS, END OF PERIOD296.8766.0
Consolidating Adjustments [Member]
  
Guarantor Obligations [Line Items]  
Net cash (used in) provided by operating activities of continuing operations  
Acquisition of Pride International, Inc., net of cash acquired  
Additions to property and equipment  
Proceeds from disposition of assets  
Other  
Net cash used in investing activities  
Cash dividends paid  
Proceeds from issuance of senior notes  
Reduction of long-term borrowings  
Commercial paper borrowings, net  
Equity financing costs  
Debt financing costs  
Advances (to) from affiliates  
Other  
Net cash provided by (used in) financing activities  
Effect of exchange rate changes on cash and cash equivalents  
DECREASE IN CASH AND CASH EQUIVALENTS  
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD  
CASH AND CASH EQUIVALENTS, END OF PERIOD