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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 87.3	$ 293.8	$ 856.6	$ 884.4
OTHER COMPREHENSIVE INCOME (LOSS), NET
Net change in fair value of derivatives	0.0	(14.8)	(0.6)	(23.5)
Reclassification of net losses on derivative instruments from other comprehensive income into net income	2.2	5.8	10.1	15.9
Other	(0.5)	2.9	(0.5)	4.2
NET OTHER COMPREHENSIVE (LOSS) INCOME	1.7	(6.1)	9.0	(3.4)
COMPREHENSIVE INCOME	89.0	287.7	865.6	881.0
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(2.0)	(1.8)	(5.4)	(7.4)
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO	$ 87.0	$ 285.9	$ 860.2	$ 873.6

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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