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Guarantee Of Registered Securities Guarantee Of Registered Securities (Condensed Consolidating Statements of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
NET INCOME	$ 592.6	$ 262.7	$ 769.3	$ 590.6
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	(4.1)	8.7	(0.6)	(8.7)
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	2.0	5.1	7.9	10.1
Other	0.1	(1.3)	0.0	1.3
NET OTHER COMPREHENSIVE (LOSS) INCOME	(2.0)	12.5	7.3	2.7
COMPREHENSIVE INCOME	590.6	275.2	776.6	593.3
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.0)	(2.4)	(3.4)	(5.6)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	588.6	272.8	773.2	587.7
Ensco Plc [Member]
NET INCOME	590.6	260.3	765.9	585.0
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	590.6	260.3	765.9	585.0
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	590.6	260.3	765.9	585.0
ENSCO International Inc. [Member]
NET INCOME	23.0	33.4	22.6	45.4
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Net change in fair value of derivatives	(4.1)	8.7	(0.6)	(8.7)
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income	2.0	5.1	7.9	10.1
NET OTHER COMPREHENSIVE (LOSS) INCOME	(2.1)	13.8	7.3	1.4
COMPREHENSIVE INCOME	20.9	47.2	29.9	46.8
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	20.9	47.2	29.9	46.8
Pride International, Inc. [Member]
NET INCOME	(8.6)	56.2	25.9	104.2
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	(8.6)	56.2	25.9	104.2
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	(8.6)	56.2	25.9	104.2
Other Non-Guarantor Subsidiaries Of Ensco [Member]
NET INCOME	382.3	339.6	655.0	788.0
OTHER COMPREHENSIVE INCOME (LOSS), NET:
Other	0.1	(1.3)	0.0	1.3
NET OTHER COMPREHENSIVE (LOSS) INCOME	0.1	(1.3)	0.0	1.3
COMPREHENSIVE INCOME	382.4	338.3	655.0	789.3
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.0)	(2.4)	(3.4)	(5.6)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	380.4	335.9	651.6	783.7
Consolidating Adjustments [Member]
NET INCOME	(394.7)	(426.8)	(700.1)	(932.0)
OTHER COMPREHENSIVE INCOME (LOSS), NET:
COMPREHENSIVE INCOME	(394.7)	(426.8)	(700.1)	(932.0)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$ (394.7)	$ (426.8)	$ (700.1)	$ (932.0)

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