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Noncontrolling Interests Reconciliation of income from continuing operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Noncontrolling Interest [Abstract]
Income (loss) from continuing operations	$ 272.8	$ (351.2)	$ 600.9	$ (52.5)
Income from continuing operations attributable to noncontrolling interests	(2.4)	(3.0)	(5.6)	(7.1)
Income (loss) from continuing operations attributable to Ensco	$ 270.4	$ (354.2)	$ 595.3	$ (59.6)

X

- Definition

Income (Loss) from Continuing Operations, Portion Attributable to Noncontrolling Interest

+ References

No definition available.

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- Definition

Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

+ References

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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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