v2.4.0.6
Derivative Instruments (Tables)
3 Months Ended
Mar. 31, 2011
Derivative Instruments [Abstract]  
Schedule Of Derivatives At Fair Value
Schedule Of Gains And Losses On Derivatives Designated As Cash Flow Hedges
Estimated Net Gains Associated With Derivative Instruments, Net Of Tax That Will Be Reclassified To Earnings Within Twelve Months
   
Net unrealized gains to be reclassified to contract drilling expense
 
$1.8
   
Net realized losses to be reclassified to other income, net
 
(.3
)
 
Net gains to be reclassified to earnings
 
$1.5