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STOCK COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2019
Share-based Payment Arrangement [Abstract] |
Schedule of Stock Based Compensation | The following represents total stock based compensation expense for non-qualified stock options, RSUs and the tax related benefit for the three and nine months ended September 30, 2019 and 2018:
|  | Three Months Ended |  |  |  | Nine Months Ended |  |
(in millions) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Stock option expense |  | $ | 0.6 |  |  | $ | 1.7 |  |  | $ | 5.6 |  |  | $ | 5.1 |
RSU expense |  | 14.6 |  |  | 3.4 |  |  | 43.4 |  |  | 9.2 |
Total stock based compensation expense |  | $ | 15.2 |  |  | $ | 5.1 |  |  | $ | 49.0 |  |  | $ | 14.3 |
Related deferred income tax benefit |  | $ | 1.8 |  |  | $ | 0.8 |  |  | $ | 6.8 |  |  | $ | 2.4 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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