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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 176.7	$ 327.9
OTHER COMPREHENSIVE (LOSS) INCOME, NET
Net change in fair value of derivatives	3.5	(17.4)
Reclassification of net losses (gains) on derivative instruments from other comprehensive income into net income	5.9	5.0
Other	(0.1)	2.6
NET OTHER COMPREHENSIVE (LOSS) INCOME	9.3	(9.8)
COMPREHENSIVE INCOME	186.0	318.1
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1.4)	(3.2)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$ 184.6	$ 314.9

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