Capital Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended					6 Months Ended
	Apr. 01, 2009	Jul. 01, 2008	Jul. 01, 2012	Jul. 03, 2011	Jun. 29, 2012	Jul. 01, 2011	Apr. 29, 2008	Jul. 01, 2012 Common Stock [Member]	Jul. 03, 2011 Common Stock [Member]	Jul. 01, 2012 Class B Common Stock [Member]	Jul. 03, 2011 Class B Common Stock [Member]	Mar. 06, 2012 Class B Common Stock [Member]	Mar. 08, 2011 Class B Common Stock [Member]	Apr. 29, 2008 Class B Common Stock [Member]
Capital Transactions (Textual) [Abstract]
Dividend declared and paid on the common stock								$ 0.50	$ 0.50	$ 0.50	$ 0.50
Total Performance Units Authorized														400,000
Annual performance units granted							40,000
Maximum goal achievement percentage														100.00%
Performance unit award agreement costs recognized			$ 1.3	$ 1.3
Increase in total number of shares outstanding										22,320	22,320
Stock price					$ 64.28	$ 67.33
Performance units awarded												40,000	40,000
Performance units awards settled in cash			17,680	17,680
Common B stock per performance unit.		1
Term of performance unit award agreement.	P10Y