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Financing (Commercial Paper Program And Credit Facility) (Narrative) (Details)
€ in Millions
12 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2014
EUR (€)
Dec. 31, 2013
USD ($)
Debt Instrument [Line Items]        
Commercial paper $ 764,600,000 $ 764,600,000   $ 450,000,000
Euro-Denominated Commercial Paper        
Debt Instrument [Line Items]        
Commercial paper 315,000,000 315,000,000 € 260 0
U.S. Dollar-Denominated Commercial Paper        
Debt Instrument [Line Items]        
Commercial paper $ 450,000,000 $ 450,000,000   $ 450,000,000
Commercial paper        
Debt Instrument [Line Items]        
Weighted average interest rate of short-term debt 0.13% 0.13% 0.13%  
Weighted average maturity of commercial paper, days 12 days      
Revolving Credit Facility        
Debt Instrument [Line Items]        
Line of credit $ 2,500,000,000 $ 2,500,000,000    
Consolidated leverage ratio 0.65 0.65 0.65  
Line of credit facility, amount outstanding $ 0 $ 0    
Eurodollars base rate | Revolving Credit Facility        
Debt Instrument [Line Items]        
Basis spread percentage to determine floating interest rate   1.00%    
Minimum | Federal funds base rate | Revolving Credit Facility        
Debt Instrument [Line Items]        
Basis spread percentage to determine floating interest rate   0.50%