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Debt And Bank Credit Facilities (Schedule Of Senior Notes) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Oct. 01, 2011
Jan. 01, 2011
Oct. 01, 2011
Minimum [Member]
Floating Rate Series 2007A Senior Notes, Tranche A, [Member]
Oct. 01, 2011
Minimum [Member]
Floating Rate Series 2007A Senior Notes, Tranche B, [Member]
Oct. 01, 2011
Minimum [Member]
Fixed Rate Series 2011A, Tranche D [Member]
Oct. 01, 2011
Minimum [Member]
Fixed Rate Series 2011A, Tranche E [Member]
Oct. 01, 2011
Maximum [Member]
Floating Rate Series 2007A Senior Notes, Tranche A, [Member]
Oct. 01, 2011
Maximum [Member]
Floating Rate Series 2007A Senior Notes, Tranche B, [Member]
Oct. 01, 2011
Maximum [Member]
Fixed Rate Series 2011A, Tranche D [Member]
Oct. 01, 2011
Maximum [Member]
Fixed Rate Series 2011A, Tranche E [Member]
Oct. 01, 2011
Floating Rate Series 2007A Senior Notes, Tranche A, [Member]
Oct. 01, 2011
Floating Rate Series 2007A Senior Notes, Tranche B, [Member]
Oct. 01, 2011
Fixed Rate Series 2011A, Tranche C [Member]
Oct. 01, 2011
Fixed Rate Series 2011A, Tranche D [Member]
Oct. 01, 2011
Fixed Rate Series 2011A, Tranche E [Member]
Debt Instrument [Line Items]               
Senior notes, Principal$ 750,000$ 250,000        $ 150,000$ 100,000$ 100,000$ 230,000$ 170,000
Senior notes, Floating Interest Rate          Floating[1]Floating[1]   
Fixed interest rate    4.80%4.90%  5.00%5.10%  4.10%  
Senior notes, Maturity          August 2014August 2017July 2018July 2021July 2023
Floating Interest Rate  0.90%0.90%  1.00%1.00%       
[1] Interest rates vary as LIBOR varies. At October 1, 2011, the interest was between 0.9 and 1.0%.