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Financing Arrangements Narrative (Details)
Mar. 31, 2016
EUR (€)
Mar. 31, 2016
BRL
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity     $ 2,800,000,000  
Letter of Credit Subfacility Maturing 2014        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity   BRL 1,000,000,000 281,000,000 $ 256,000,000
Borrowings under credit facility     0 0
Foreign Line of Credit        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity | € € 250,000,000      
Line of Credit        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity     500,000,000  
Borrowings under credit facility     0 $ 0
Credit facility Maturing September, 2019        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity     $ 2,000,000,000.0