Common Stock Repurchase Program (Details) (USD $) Share data in Millions, unless otherwise specified	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Feb. 24, 2012 Stock repurchase program authorized on February 24, 2012	Dec. 29, 2012 Stock repurchase program authorized on February 24, 2012	Oct. 21, 2010 Stock repurchase program authorized on October 21, 2010	Dec. 31, 2011 Stock repurchase program authorized on October 21, 2010	Jan. 01, 2011 Stock repurchase program authorized on October 21, 2010
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 20,000,000		$ 20,000,000
Period in force	12 months		12 months
Number of shares repurchased		4.1		2.4	0.4
Value of shares repurchased		17,500,000		14,400,000	2,000,000
Number of shares remaining under the approved program		$ 2,500,000