Annual report pursuant to Section 13 and 15(d)

Financial Instruments (Details) (Quantitative Information about Level 3 Fair Value Measurements)

v2.4.0.6
Financial Instruments (Details) (Quantitative Information about Level 3 Fair Value Measurements)
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Discount rate for periodic interest payment 0.84% 1.13%
Discount rate for principle repayment 1.31% 1.93%
Liquidity discount 0.90% 0.90%
Maximum
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Credit discounts 12.00% 2.00%
Estimated life of available-for-sale securities 20 years 17 years
Minimum
    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Credit discounts 2.00% 2.00%
Estimated life of available-for-sale securities 17 years 17 years