Annual report pursuant to Section 13 and 15(d)

Schedule of Assumption Used and Resulting Weighted Average Fair Value of Stock Option Granted (Detail)

v2.4.0.8
Schedule of Assumption Used and Resulting Weighted Average Fair Value of Stock Option Granted (Detail) (USD $)
12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Share Based Payment Award Stock Options Valuation Assumptions [Line Items]      
Expected volatility, minimum 24.00% 27.00% 27.00%
Expected volatility, maximum 29.00% 31.00% 38.00%
Weighted average expected volatility 27.00% 30.00% 34.00%
Dividend yield 2.30% 2.50% 3.10%
Risk-free interest rate, minimum 0.10% 0.10% 0.20%
Risk-free interest rate, maximum 2.00% 2.10% 3.50%
Weighted average fair value at date of grant $ 8.34 $ 8.36 $ 6.28
Minimum
     
Share Based Payment Award Stock Options Valuation Assumptions [Line Items]      
Expected term 5 years 7 months 6 days 5 years 7 months 6 days 5 years 7 months 6 days
Maximum
     
Share Based Payment Award Stock Options Valuation Assumptions [Line Items]      
Expected term 7 years 4 months 24 days 7 years 6 months 7 years 6 months