Operations And Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 29, 2012

Accounting Policies [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The following assumptions were used to determine the weighted average fair value of options granted during the years ended December 29, 2012, December 31, 2011 and January 1, 2011.

	2012			2011			2010
Assumptions used in Black-Scholes pricing model:
Expected dividend yield	2.86		%	3.68		%	2.91		%
Risk-free interest rate	1.13		%	2.69		%	2.77		%
Weighted average expected life	6.0 years			6.7 years			6.1 years
Expected volatility	30.59		%	30.34		%	27.27		%
Weighted average fair value per share of options granted	$	4.83		$	3.83		$	4.81

Fair Value Hierarchy

We have classified assets and liabilities required to be measured at fair value into the fair value hierarchy as set forth below:

Level 1	Quoted prices in active markets for identical assets and liabilities.
Level 2	Observable inputs other than quoted prices for identical assets and liabilities.
Level 3	Unobservable inputs in which there is little or no market data available, which requires us to develop our own assumptions.

Estimated useful lives of long-term assets

The following table summarizes the majority of our estimated useful lives of long-term depreciable assets:

	Useful Life
Buildings and building improvements	10-45 years
Land improvements	10-15 years
Machinery, equipment and computer systems	3-20 years
Furniture and fixtures	3-12 years
Trucks, trailers and automobiles	3-10 years