Capital Stock and Dividends Dividends (Details) (USD $)	3 Months Ended									12 Months Ended
	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 24, 2011	Jun. 25, 2011	Mar. 26, 2011	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Dividends [Abstract]
Dividends Payable, Date to be Paid	Mar. 12, 2013	Dec. 04, 2012	Sep. 05, 2012	Jun. 05, 2012	Mar. 13, 2012	Nov. 29, 2011	Aug. 30, 2011	Jun. 01, 2011	Mar. 08, 2011
Dividends Payable, Date of Record	Feb. 25, 2013	Nov. 19, 2012	Aug. 20, 2012	May 21, 2012	Feb. 27, 2012	Nov. 14, 2011	Aug. 15, 2011	May 16, 2011	Feb. 22, 2011
Dividends Payable, Date Declared	Feb. 06, 2013	Oct. 31, 2012	Aug. 01, 2012	May 02, 2012	Feb. 08, 2012	Oct. 26, 2011	Jul. 28, 2011	Apr. 28, 2011	Feb. 04, 2011
Common Stock, Dividends, Per Share, Declared	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.07	$ 0.72	$ 0.43	$ 0.28