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Income Taxes Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Taxes [Line Items]        
Effective tax rate 29.10% 29.10% 29.60% 29.00%
Favorable (unfavorable) impact on effective tax rate due to a discrete tax event   $ 15    
GREECE [Member]
       
Income Taxes [Line Items]        
Favorable (unfavorable) impact on effective tax rate due to a discrete tax event       11
BRAZIL [Member]
       
Income Taxes [Line Items]        
Favorable (unfavorable) impact on effective tax rate due to a discrete tax event       15
UNITED STATES [Member]
       
Income Taxes [Line Items]        
Open Tax Years by Major Tax Jurisdiction     2004 onward  
Income Tax Examination, Year(s) under Examination     2004 to 2006  
GERMANY [Member]
       
Income Taxes [Line Items]        
Open Tax Years by Major Tax Jurisdiction     2007 onward  
INDONESIA [Member]
       
Income Taxes [Line Items]        
Open Tax Years by Major Tax Jurisdiction     2007 onward  
RUSSIAN FEDERATION [Member]
       
Income Taxes [Line Items]        
Open Tax Years by Major Tax Jurisdiction     2010 onward  
SWITZERLAND [Member]
       
Income Taxes [Line Items]        
Open Tax Years by Major Tax Jurisdiction     2010 onward