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DISCONTINUED OPERATIONS (Details) - Discontinued Operations, Disposed of by Sale [Member] - Rowan Land Rig [Member] $ in Millions	12 Months Ended
	Dec. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from sale	$ 6.0
Gain on sale of discontinued operations, net of tax	4.0
Income tax benefit from discontinued operations	$ 2.1

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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