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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Reconciliation Of Net Income Attributable To Ensco Shares
The following table is a reconciliation of net income attributable to Ensco shares used in our basic and diluted EPS computations for the three-month periods ended March 31, 2013 and 2012 (in millions):
 
2013
 
2012
Net income attributable to Ensco
$
317.1

 
$
265.4

Net income allocated to non-vested share awards
(3.3
)
 
(2.7
)
Net income attributable to Ensco shares
$
313.8

 
$
262.7

Reconciliation Of Weighted-Average Shares Used In Earnings Per Share Computations
The following table is a reconciliation of the weighted-average shares outstanding used in our basic and diluted EPS computations for the three-month periods ended March 31, 2013 and 2012 (in millions):
 
2013
 
2012
Weighted-average shares - basic
230.3

 
228.8

Potentially dilutive shares
.3

 
.4

Weighted-average shares - diluted
230.6

 
229.2