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Debt And Bank Credit Facilities (Details On The Senior Notes) (Details) - USD ($)
6 Months Ended
Jul. 04, 2015
Jan. 03, 2015
Floating Rate Series 2007A    
Debt Instrument [Line Items]    
Variable rate terms [1] Floating (1)  
Interest rate 1.00% 0.90%
Maturity Aug. 23, 2017  
Fixed Rate Series 2011A    
Debt Instrument [Line Items]    
Debt instrument interest rate 4.10%  
Maturity Jul. 14, 2018  
Fixed Rate Series 2011A    
Debt Instrument [Line Items]    
Stated rate, minimum 4.80%  
Stated rate, maximum 5.00%  
Maturity Jul. 14, 2021  
Fixed Rate Series 2011A    
Debt Instrument [Line Items]    
Stated rate, minimum 4.90%  
Stated rate, maximum 5.10%  
Maturity Jul. 14, 2023  
Senior Notes    
Debt Instrument [Line Items]    
Principal $ 600,000,000  
Senior Notes | Floating Rate Series 2007A    
Debt Instrument [Line Items]    
Principal 100,000,000.0  
Senior Notes | Fixed Rate Series 2011A    
Debt Instrument [Line Items]    
Principal 100,000,000.0  
Senior Notes | Fixed Rate Series 2011A    
Debt Instrument [Line Items]    
Principal 230,000,000.0  
Senior Notes | Fixed Rate Series 2011A    
Debt Instrument [Line Items]    
Principal $ 170,000,000.0  
[1] Interest rates vary as LIBOR varies. At July 4, 2015, the interest rate was 1.0%, and at January 3, 2015 the interest rate was 0.9%.