XML 41 R53.htm IDEA: XBRL DOCUMENT v2.4.0.6
Schedule of Assumption Used and Resulting Weighted Average Fair Value of Stock Option Granted (Detail) (USD $)
3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Share Based Payment Award Stock Options Valuation Assumptions [Line Items]    
Expected volatility, minimum 24.00% 27.00%
Expected volatility, maximum 29.00% 31.00%
Weighted average expected volatility 26.60% 30.00%
Dividend yield 2.30% 2.50%
Risk-free interest rate, minimum 0.10% 0.10%
Risk-free interest rate, maximum 2.00% 2.10%
Weighted average grant date fair value $ 32.25 $ 33.44
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
Maximum
   
Share Based Payment Award Stock Options Valuation Assumptions [Line Items]    
Expected term 7 years 4 months 2 days 7 years 6 months