Debt And Financing Arrangements (Narrative) (Details) $ in Billions	Jun. 30, 2016 USD ($)
Line of Credit Facility [Line Items]
Excess of fair value over carrying value of long-term debt	$ 1.4
Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	7.5
Unused lines of credit	4.9
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	4.0
Unused lines of credit	1.4
Accounts Receivable Securitization Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1.5
Used lines of credit	$ 1.1