Debt And Financing Arrangements (Narrative) (Details) (USD $) In Billions, unless otherwise specified	Sep. 30, 2014
Debt And Financing Arrangements [Line Items]
Excess of fair value over carrying value of long-term debt	$ 1.2
Convertible senior notes point eight seven five percent due two thousand fourteen [Member]
Debt And Financing Arrangements [Line Items]
Debt instrument face amount	1.15
Line of Credit [Member]
Debt And Financing Arrangements [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	6.7
Unused lines of credit	6.6
Commercial Paper [Member]
Debt And Financing Arrangements [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	4.0
Accounts Receivable Securitization Facility [Member]
Debt And Financing Arrangements [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1.6
Used lines of credit	$ 1.3