v2.3.0.15
Contingencies (Narrative) (Details) (USD $)
1 Months Ended9 Months Ended12 Months Ended9 Months Ended1 Months Ended9 Months Ended1 Months Ended
Mar. 31, 2009
Sep. 30, 2011
Dec. 31, 2006
Sep. 30, 2009
Sep. 30, 2011
Reduction In Merger Agreement Payable [Member]
Sep. 30, 2011
Reduction In Merger Termination Period [Member]
Sep. 30, 2011
Number Of Plaintiffs State Courts [Member]
Sep. 30, 2011
Number Of Plaintiffs US District Court [Member]
Jul. 31, 2009
Spain [Member]
Sep. 30, 2011
Brazil [Member]
Sep. 30, 2010
Seahawk [Member]
Oil and Gas Delivery Commitments and Contracts [Line Items]           
Distance from original drilling location in miles95          
Property insurance self-insured retention per occurrence $ 50,000,000         
Property coverage limit for sue and labor costs - ENSCO 74 25,000,000         
Property coverage limit for wreckage and debris removal costs - ENSCO 74 50,000,000         
Annual liability coverage limit for wreckage and debris removal costs - ENSCO 74 500,000,000         
Merger related fees payable 260,000,000  195,000,000      
Maximum fees and expenses unable to be opposed 1,100,000         
Merger related termination period 12   9     
Minimum estimate leg and debris removal costs 21,000,000         
Maximum estimate leg and debris removal costs 35,000,000         
Liability and insurance receivable for ENSCO 74 leg removal costs 21,000,000         
Civil litigation claim damages for cost of repair and business interruption due to pipeline rupture   26,000,000       
Civil litigation damages10,000,000          
Liability insurance self-insured retention per occurrence 10,000,000         
Annual liability coverage limit for wreckage and debris removal costs 500,000,000         
Liability insurance self-insured retention 15,000,000         
Liability insurance self insured retention for each occurrence thereafter 1,000,000         
ENSCO 69 insured value, package policy 65,000,000         
Packaged policy ENSCO 69 deductible 10,000,000         
Minimum estimate of ENSCO 29 wreckage removal costs 5,000,000         
Maximum estimate of ENSCO 29 wreckage removal costs 15,000,000         
Property coverage limit ENSCO 29 wreckage and debris removal costs 3,800,000         
Liability coverage excess ENSCO 29 wreckage and debris removal costs 3,800,000         
ENSCO 29 insurance provision  1,200,000        
Representation of claim, percentage 10.00%         
Gain related to litigation settlement 10,800,000         
Minimum estimate of removal costs  5,000,000        
Initial multi-party asbestos claims 600         
Number of plaintiffs 65    623   
Aggregate amount of fine sought by governmental authorities         2,000,000 
Aggregate amount of pending administrative proceeding raised by governmental authority        4,000,000  
Environmental liabilities 2,000,000         
Line of credit assumed          50,000,000
Line of credit recorded liability $ 700,000