Stock-Based Compensation (Summary Of Performance Based Equity Portion Percentage Of Equity Award) (Details)	Dec. 27, 2014	Dec. 28, 2013
Stock Options [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in annual performance-based equity, percent	25.00%	50.00%
Stock Options [Member] | Other Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in annual performance-based equity, percent	25.00%	25.00%
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in annual performance-based equity, percent	25.00%	25.00%
Restricted Stock Units (RSUs) [Member] | Other Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in annual performance-based equity, percent	25.00%	50.00%
Performance Restricted Stock Units [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in annual performance-based equity, percent	50.00%	25.00%
Performance Restricted Stock Units [Member] | Other Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in annual performance-based equity, percent	50.00%	25.00%