Long-Term Debt And Borrowing Arrangements (Schedule Of Committed Credit Facilities) (Detail Section) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)
Line of Credit Facility [Line Items]
Amounts drawn under uncommitted credit facilities	$ 1	$ 1
Bank Overdraft [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate During Period		3.22%
Minimum [Member] | Uncommitted Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate During Period	0.74%
Maximum [Member] | Uncommitted Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate During Period	1.54%