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Financing (Commercial Paper Program And Credit Facility) (Narrative) (Details)
0 Months Ended 42 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2013
Euro-Denominated Commercial Paper [Member]
USD ($)
Dec. 31, 2012
Euro-Denominated Commercial Paper [Member]
USD ($)
Dec. 31, 2012
Euro-Denominated Commercial Paper [Member]
EUR (€)
Dec. 31, 2013
Commercial Paper [Member]
Dec. 31, 2013
Multi Year Facility [Member]
USD ($)
Dec. 29, 2011
Revolving Credit Facility [Member]
USD ($)
Jun. 17, 2011
Revolving Credit Facility [Member]
USD ($)
Jul. 15, 2016
Eurodollars Base Rate
Multi Year Facility [Member]
Jul. 15, 2016
Federal Funds Base Rate
Debt Instrument [Line Items]                      
Commercial paper $ 450,000,000 $ 1,224,500,000 $ 0 $ 66,000,000 € 50,000,000            
Weighted average interest rate of short-term debt           0.10%          
Weighted average maturity of commercial paper, days           14 days          
Line of credit             2,500,000,000        
Basis spread percentage to determine floating interest rate                   1.00% 0.50%
Consolidated leverage ratio             0.65        
Line of credit facility, amount outstanding             0 0      
Unsecured revolving credit facility                 $ 3,000,000,000