Stock-Based Compensation (Schedule Of Weighted-Average Black-Scholes Fair Value Assumptions) (Details)	3 Months Ended
	Mar. 19, 2011 Y
Stock-Based Compensation [Abstract]
Expected life, in years	6
Risk free interest rate	2.60%
Expected volatility	16.00%	[1]
Expected dividend yield	2.90%

[1] Reflects movements in our stock price over the most recent historical period equivalent to the expected life.