Business Segments and Enterprise-Wide Information (Schedule Of Contributions By Major Customers) (Details) - Customer Concentration Risk - Sales Revenue, Net	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Wal-Mart Stores Inc.
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	16.70%	16.40%	16.40%	16.40%
Walgreen Co.
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	12.40%	13.50%	13.10%	14.00%
The Kroger Company
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	9.60%	10.00%	9.60%	9.90%