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Stock-Based Compensation (Summary Of Weighted-Average Assumptions Of Fair Value Granted Using Black-Scholes Valuation Model) (Detail)
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Stock Option [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Expected term of option (in years) 5 years 4 months 10 days 5 years 10 months 21 days 5 years 10 months 6 days
Expected volatility factor 36.93% 34.22% 33.98%
Expected dividend yield 2.72% 2.72% 2.76%
Risk-free interest rate 0.82% 2.31% 2.39%
Stock Appreciation Rights [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Expected term of option (in years) 4 years 5 months 27 days 4 years 8 months 1 day 5 years 6 months 15 days
Expected volatility factor 36.44% 38.45% 34.59%
Expected dividend yield 2.69% 2.72% 2.76%
Risk-free interest rate 0.72% 0.83% 2.39%