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Income Taxes Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Effective tax rate	30.00%	28.90%
Greece [Member]
Favorable (unfavorable) impact on effective tax rate due to a discrete tax event		11
United States [Member]
Open Tax Years by Major Tax Jurisdiction	2004 onward
Income Tax Examination, Year(s) under Examination	2004 to 2006
GERMANY
Open Tax Years by Major Tax Jurisdiction	2007 onward
INDONESIA
Open Tax Years by Major Tax Jurisdiction	2007 onward
RUSSIAN FEDERATION
Open Tax Years by Major Tax Jurisdiction	2010 onward
SWITZERLAND
Open Tax Years by Major Tax Jurisdiction	2010 onward

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to changes in the income tax rates under enacted tax laws in the period.

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