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Financing Arrangements (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Financing Arrangements    
Debt outstanding $ 1,810,000,000 $ 1,800,000,000
Short-term borrowings    
Short-term borrowings in various currencies (at rates ranging from 1% to 11% for 2013 and 1% to 7% for 2012) $ 93,000,000 $ 76,000,000
Maximum
    
Short-term borrowings    
Short-term borrowings in various currencies, interest rate (as a percent) 11.00% 7.00%
Minimum
    
Short-term borrowings    
Short-term borrowings in various currencies, interest rate (as a percent) 1.00% 1.00%