Income Taxes	9 Months Ended
Sep. 30, 2011
Income Taxes [Abstract]
Income Taxes	Note 11 - Income Taxes Our consolidated effective income tax rate for the three-month and nine-month periods ended September 30, 2011 of 16.9% and 18.3%, respectively, includes the impact of various discrete tax items, the majority of which is attributable to a gain on disposal of assets in a jurisdiction with a high tax rate and the recognition of a liability for unrecognized tax benefits associated with a tax position taken in a prior year during the six-month period ended June 30, 2011. Excluding the impact of the aforementioned discrete items, our consolidated effective income tax rate for the three-month and nine-month periods ended September 30, 2011 was 16.3% and 15.4%, respectively, compared to a consolidated effective income tax rate, excluding discrete tax items, of 17.7% and 17.1% for the three-month and nine-month periods ended September 30, 2010. The decrease was primarily attributable to the transfer of ownership of several of our drilling rigs among our subsidiaries in April 2010 and December 2010, which resulted in an increase in the relative components of our earnings generated in tax jurisdictions with lower tax rates.

Income Taxes

9 Months Ended

Sep. 30, 2011

Note 11 - Income Taxes

Our consolidated effective income tax rate for the three-month and nine-month periods ended September 30, 2011 of 16.9% and 18.3%, respectively, includes the impact of various discrete tax items, the majority of which is attributable to a gain on disposal of assets in a jurisdiction with a high tax rate and the recognition of a liability for unrecognized tax benefits associated with a tax position taken in a prior year during the six-month period ended June 30, 2011. Excluding the impact of the aforementioned discrete items, our consolidated effective income tax rate for the three-month and nine-month periods ended September 30, 2011 was 16.3% and 15.4%, respectively, compared to a consolidated effective income tax rate, excluding discrete tax items, of 17.7% and 17.1% for the three-month and nine-month periods ended September 30, 2010. The decrease was primarily attributable to the transfer of ownership of several of our drilling rigs among our subsidiaries in April 2010 and December 2010, which resulted in an increase in the relative components of our earnings generated in tax jurisdictions with lower tax rates.