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EMPLOYEE STOCK AND SAVINGS PLANS EMPLOYEE STOCK AND SAVINGS PLANS (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract] |  |  |
Contributions expensed | $ 29.0 | $ 30.9 | $ 28.9
Maximum election to defer annual salary (as a percent) | 50.00% |  |
Maximum election to defer bonus before taxes (as a percent) | 80.00% |  |
Asset under deferred compensation plan | $ 12.1 | 10.7 |
Liability under deferred compensation plan | $ 12.1 | $ 10.7 |

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