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LONG-TERM INCENTIVE EMPLOYEE COMPENSATION - Employee Compensation Costs (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |  |
Share-based compensation expense, equity-based awards | $ 5.2 | $ 3.2 | $ 12.5 | $ 9.1
Share-based compensation expense, liability-based awards | 0.8 | 0.4 | 1.7 | 1.2
Total share-based compensation expense in operating income (loss) | $ 6.0 | $ 3.6 | $ 14.2 | $ 10.3

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