Debt And Bank Credit Facilities (Details Of The Senior Notes) (Details) (USD $) In Millions, unless otherwise specified			9 Months Ended										9 Months Ended
	Sep. 28, 2013	Dec. 29, 2012	Sep. 28, 2013 Floating Rate Series 2007A Mature In August 2014 [Member]		Sep. 28, 2013 Floating Rate Series 2007A Mature In August 2017 [Member]		Sep. 28, 2013 Fixed Rate Series 2011A Mature In July 2018 [Member]	Sep. 28, 2013 Fixed Rate Series 2011A Mature In July 2021 [Member]	Sep. 28, 2013 Fixed Rate Series 2011A Mature In July 2023 [Member]	Sep. 28, 2013 Maximum [Member] Fixed Rate Series 2011A Mature In July 2021 [Member]	Sep. 28, 2013 Maximum [Member] Fixed Rate Series 2011A Mature In July 2023 [Member]	Sep. 28, 2013 Minimum [Member]	Sep. 28, 2013 Minimum [Member] Fixed Rate Series 2011A Mature In July 2021 [Member]	Sep. 28, 2013 Minimum [Member] Fixed Rate Series 2011A Mature In July 2023 [Member]
Debt Instrument [Line Items]
Senior notes, Principal	$ 750.0	$ 750.0	$ 150.0		$ 100.0		$ 100.0	$ 230.0	$ 170.0
Variable rate terms			Floating (1)	[1]	Floating (1)	[1]
Stated rate, minimum													4.80%	4.90%
Stated rate, maximum										5.00%	5.10%
Debt instrument interest rate							4.10%
Spread on variable interest rate												0.90%
Maturity date			Aug. 01, 2014		Aug. 01, 2017		Jul. 01, 2018	Jul. 01, 2021	Jul. 01, 2023

[1] Interest rates vary as LIBOR varies. At September 28, 2013, the interest rate was 0.9%.