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Guarantee Of Registered Securities Guarantee Of Registered Securities (Condensed Consolidating Statements of Comprehensive Income) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
NET INCOME $ 296.7 $ 319.9
OTHER COMPREHENSIVE INCOME (LOSS), NET:    
Net change in fair value of derivatives 4.9 (4.0)
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income 0.5 (1.0)
Other 0 (0.1)
NET OTHER COMPREHENSIVE (LOSS) INCOME 5.4 (5.1)
COMPREHENSIVE INCOME 302.1 314.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS (4.2) (2.8)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO 297.9 312.0
Ensco Plc [Member]
   
NET INCOME 292.5 317.1
OTHER COMPREHENSIVE INCOME (LOSS), NET:    
Net change in fair value of derivatives 0 0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income 0 0
Other   0
NET OTHER COMPREHENSIVE (LOSS) INCOME 0 0
COMPREHENSIVE INCOME 292.5 317.1
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS 0 0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO 292.5 317.1
ENSCO International Inc. [Member]
   
NET INCOME 57.6 73.8
OTHER COMPREHENSIVE INCOME (LOSS), NET:    
Net change in fair value of derivatives 4.9 (4.0)
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income 0.5 (1.0)
Other   0
NET OTHER COMPREHENSIVE (LOSS) INCOME 5.4 (5.0)
COMPREHENSIVE INCOME 63.0 68.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS 0 0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO 63.0 68.8
Pride International, Inc. [Member]
   
NET INCOME (27.5) 37.8
OTHER COMPREHENSIVE INCOME (LOSS), NET:    
Net change in fair value of derivatives 0 0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income 0 0
Other   0
NET OTHER COMPREHENSIVE (LOSS) INCOME 0 0
COMPREHENSIVE INCOME (27.5) 37.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS 0 0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO (27.5) 37.8
Other Non-Guarantor Subsidiaries Of Ensco [Member]
   
NET INCOME 377.9 410.9
OTHER COMPREHENSIVE INCOME (LOSS), NET:    
Net change in fair value of derivatives 0 0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income 0 0
Other   (0.1)
NET OTHER COMPREHENSIVE (LOSS) INCOME 0 (0.1)
COMPREHENSIVE INCOME 377.9 410.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS (4.2) (2.8)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO 373.7 408.0
Consolidating Adjustments [Member]
   
NET INCOME (403.8) (519.7)
OTHER COMPREHENSIVE INCOME (LOSS), NET:    
Net change in fair value of derivatives 0 0
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income 0 0
Other   0
NET OTHER COMPREHENSIVE (LOSS) INCOME 0 0
COMPREHENSIVE INCOME (403.8) (519.7)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS 0 0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO $ (403.8) $ (519.7)