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Share-Based Compensation (Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions) (Details)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected volatility (%)	34.80%	36.50%	40.90%
Expected term (yrs)	9 years 1 month 12 days	8 years 6 months 22 days	9 years 6 months 0 days
Risk-free rate (%)	2.10%	2.20%	2.90%

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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