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Description Of The Business And Summary Of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Reconciliation Of Net Income Attributable To Ensco Shares Used In Basic And Diluted EPS Computations
The following table is a reconciliation of income (loss) from continuing operations attributable to Ensco shares used in our basic and diluted EPS computations for each of the years in the three-year period ended December 31, 2018 (in millions):

 
2018
 
2017
 
2016
Income (loss) from continuing operations attributable to Ensco
$
(631.6
)
 
$
(304.7
)
 
$
882.1

Income from continuing operations allocated to non-vested share awards
(.5
)
 
(.4
)
 
(16.6
)
Income (loss) from continuing operations attributable to Ensco shares
$
(632.1
)
 
$
(305.1
)
 
$
865.5