Debt And Financing Arrangements (Narrative) (Details) (USD $) In Billions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Debt And Financing Arrangements [Line Items]
Excess of fair value over carrying value of long-term debt	$ 1.2
Maximum amount of facility provided under accounts receivable securitization program	1.6
Proceeds from transfer of receivables	0.4	1.1
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]
Lines of credit	6.9
Unused lines of credit	6.7
Commercial Paper [Member]
Debt And Financing Arrangements [Line Items]
Lines of credit	$ 4.0