Capital Stock (Weighted-average Assumptions Used to Value Grants) (Details)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life		6 years 6 months	6 years 6 months
Expected stock volatility, minimum	30.60%	29.80%	30.30%
Expected stock volatility, maximum	33.90%	34.10%	31.20%
Risk-free interest rate, minimum	0.90%	1.50%	1.80%
Risk-free interest rate, maximum	1.30%	2.70%	3.10%
Expected dividend yield during the expected term, minimum	2.80%	2.20%	1.80%
Expected dividend yield during the expected term, maximum	3.70%	2.70%	2.20%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	6 years 3 months
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	6 years 6 months