Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.6
Schedule of Assumption Used and Resulting Weighted Average Fair Value of Stock Option Granted (Detail) (USD $)
12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Share Based Payment Award Stock Options Valuation Assumptions [Line Items]      
Expected volatility, minimum 27.00% 27.00% 24.00%
Expected volatility, maximum 31.00% 38.00% 39.00%
Weighted average expected volatility 30.00% 34.00% 35.00%
Dividend yield 2.50% 3.10% 3.70%
Risk-free interest rate, minimum 0.10% 0.20% 0.20%
Risk-free interest rate, maximum 2.10% 3.50% 3.70%
Weighted average grant date fair value $ 33.44 $ 25.12 $ 18.46
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 6 months
Maximum
     
Share Based Payment Award Stock Options Valuation Assumptions [Line Items]      
Expected term 7 years 6 months 7 years 6 months 7 years 7 months 6 days