Employee Stock Benefit Plans (Schedule Of Weighted-Average Assumptions Used In Stock Options Granted) (Details) |
12 Months Ended | ||
|---|---|---|---|
Dec. 30, 2016 |
Jan. 01, 2016 |
Jan. 02, 2015 |
|
| Employee Stock Option [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Expected life of options after vesting, in years | 4 years | 3 years 11 months | 4 years |
| Expected stock price volatility | 38.00% | 36.00% | 35.00% |
| Risk free interest rate | 1.49% | 1.26% | 1.29% |
| Expected dividend yield | 0.00% | 0.00% | 0.00% |
| Market Based Restricted Stock Units [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Expected life of options after vesting, in years | 3 years 1 month | 2 years 7 months | |
| Expected stock price volatility | 33.80% | 30.90% | |
| Risk free interest rate | 0.90% | 0.90% | |
| Expected dividend yield | 0.00% | 0.00% | |