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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 |  |

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