v2.4.0.6
Earnings Per Share (Reconciliation Of Net Income Attributable To Ensco Shares) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2011
Mar. 31, 2010
Earnings Per Share [Abstract]    
Net income attributable to Ensco $ 64.6 $ 189.8
Net income allocated to non-vested share awards (1.0) (2.4)
Net income attributable to Ensco shares $ 63.6 $ 187.4