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Debt And Bank Credit Facilities (Details Of The Senior Notes) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 30, 2013
Dec. 29, 2012
Mar. 30, 2013
Floating Rate Series 2007A Mature In August 2014 [Member]
Mar. 30, 2013
Floating Rate Series 2007A Mature In August 2017 [Member]
Mar. 30, 2013
Fixed Rate Series 2011A Mature In July 2018 [Member]
Mar. 30, 2013
Fixed Rate Series 2011A Mature In July 2021 [Member]
Mar. 30, 2013
Fixed Rate Series 2011A Mature In July 2023 [Member]
Mar. 30, 2013
Maximum [Member]
Fixed Rate Series 2011A Mature In July 2021 [Member]
Mar. 30, 2013
Maximum [Member]
Fixed Rate Series 2011A Mature In July 2023 [Member]
Mar. 30, 2013
Minimum [Member]
Mar. 30, 2013
Minimum [Member]
Fixed Rate Series 2011A Mature In July 2021 [Member]
Mar. 30, 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                   1.00%    
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 March 30, 2013, the interest rate was 1.0%.