Debt Other Financing (Details)
In Millions, unless otherwise specified
 3 Months Ended 3 Months Ended
Mar. 31, 2015
USD ($)
Mar. 31, 2014
USD ($)
Mar. 31, 2015
EUR (€)
Dec. 31, 2014
USD ($)
Mar. 31, 2015
Accounts Receivable Factoring
USD ($)
Dec. 31, 2014
Accounts Receivable Factoring
USD ($)
Mar. 31, 2015
Interest Expense
USD ($)
Schedule of Debt [Line Items]              
Maximum Funding From European Factoring Program     € 350        
Other Short-term Borrowings         0 0  
Receivables Factored Qualifying As Sales 27            
Accounts Receivable Discount Expense             1
Other Debt and Capital Lease Obligations 60     53      
Interest Paid $ 50 $ 37