Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Additional Information) (Detail)

v3.3.1.900
STOCK-BASED COMPENSATION (Additional Information) (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
OptionPlan
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares reserved under share-based award plan | shares 11,000,000    
Total income tax benefit recognized for stock-based compensation expense $ 13.8 $ 13.7 $ 11.6
Excess Tax Benefit From Share Based Compensation Operating Activities $ 30.0 17.7 14.6
Stock options vesting percentage for each year of completed service 33.00%    
Stock options expiration periods 10 years    
Stock options valuation method description
We use the binomial model to calculate the fair value of stock options granted on or after January 1, 2006.
   
Minimum Percentage Of Target To Which Shares May Be Issued 0.00%    
Maximum Percentage Of Target To Which Shares May Be Issued 200.00%    
Number of active share-based award plan | OptionPlan 1    
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Sharebased Payment Award Options Nonvested Number Of Shares | shares 379,607    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Sharebased Payment Award Options Nonvested Number Of Shares | shares 759,214    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total intrinsic value of stock options exercised $ 52.3 42.8 43.2
Total unrecognized compensation cost $ 2.9    
Total unrecognized compensation cost, weighted-average period of recognition 1 year 6 months    
Stock Options | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards vesting periods 3 years    
Nonvested Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost $ 29.2    
Total unrecognized compensation cost, weighted-average period of recognition 1 year 11 months    
Total weighted-average fair value on the vesting date $ 65.0 34.4 29.1
Total weighted-average grant date fair value $ 31.3 $ 17.2 $ 15.8
Nonvested Stock | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards vesting periods 1 year    
Nonvested Stock | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards vesting periods 3 years