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Shareholders' Equity	9 Months Ended
	Sep. 30, 2011
Shareholders' Equity [Abstract]
Shareholders' Equity	Note 8 - Shareholders' Equity  In connection with the Merger, each outstanding share of Pride's common stock was exchanged for the right to receive $15.60 in cash and 0.4778 Ensco ADSs. The Merger resulted in the issuance of 85.8 million Ensco ADSs each with a par value of $0.10 and a total market value of $4.6 billion based on the closing price of $53.32 on May 31, 2011.  This resulted in increases to additional paid-in capital and Class A ordinary shares of $4.6 billion and $8.6 million, respectively.  As of September 30, 2011 and December 31, 2010, our additional paid-in capital balance totaled $5.2 billion and $637.1 million, respectively, and our Class A ordinary shares balance totaled $23.6 million and $15.0 million, respectively.

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The entire disclosure for accounts comprising shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Also includes disclosure of compensation-related costs for equity-based compensation which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details, and employee stock purchase plan details.

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