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Borrowing and Lines of Credit (Narrative) (Details) - Jun. 30, 2015 - USD ($)
Total
Total
Line of Credit Facility [Line Items]    
Aggregate Line of Credit Facility Maximum Borrowing Capacity $ 4,350,000,000 $ 4,350,000,000
Maximum Commercial Paper Borrowing Authority 4,350,000,000 4,350,000,000
Revolving Credit Agreement [Member]    
Line of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 2,200,000,000 2,200,000,000
Line of Credit Facility, Amount Outstanding 0 $ 0
Line of Credit Facility, Expiration Date   May 23, 2019
Multicurrency Revolving Credit Agreement [Member]    
Line of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 2,150,000,000 $ 2,150,000,000
Line of Credit Facility, Amount Outstanding 0 $ 0
Line of Credit Facility, Expiration Date   May 23, 2019
Short term Revolving Credit Agreement [Member]    
Line of Credit Facility [Line Items]    
Line of Credit Facility, Initiation Date   Mar. 11, 2015
Line of Credit Facility, Increase (Decrease), Other, Net $ (1,500,000,000)