Capital Stock and Dividends (Details) (USD $)	3 Months Ended						9 Months Ended		3 Months Ended
	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 27, 2014 Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, dividends, amount per share	$ 0.16	$ 0.16	$ 0.13	$ 0.13	$ 0.13	$ 0.10	$ 0.45	$ 0.36	$ 0.16