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LONG-TERM INCENTIVE EMPLOYEE COMPENSATION | 9 Months Ended
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Sep. 30, 2019
Share-based Payment Arrangement [Abstract] |
LONG-TERM INCENTIVE EMPLOYEE COMPENSATION | LONG-TERM INCENTIVE EMPLOYEE COMPENSATION Our long-term incentive plan (LTIP) costs are primarily recorded within general and administrative expenses. The following table provides the components of LTIP costs for the three and nine months ended September 30, 2019 and 2018.
| Three Months |  | Nine Months
For the Periods Ended September 30 | 2019 |  | 2018 |  | 2019 |  | 2018
Equity-based awards | $ | 3.9 |  |  | $ | 6.7 |  |  | $ | 12.3 |  |  | $ | 16.9 |
Liability-based awards | 0.3 |  |  | 0.9 |  |  | 1.7 |  |  | 1.7 |
Total share-based compensation expense | $ | 4.2 |  |  | $ | 7.6 |  |  | $ | 14.0 |  |  | $ | 18.6 |
At September 30, 2019, there was $21.3 of total unrecognized compensation cost related to non-vested equity awards. This cost is expected to be recognized ratably over a weighted-average period of 1.9 years. Additionally, unrecognized compensation cost related to liability-based awards was $1.8, which is expected to be recognized ratably over a weighted-average period of 1.5 years. Year-to-Date 2019 LTIP Activity The majority of our LTIP awards are granted during the first quarter of each year and vest on the completion of a three-year service period. During the nine months ended September 30, 2019, we granted the following LTIP awards as provided in the table below:
| # of Awards Granted | Weighted Average Grant Date Fair Value Per Share
Restricted stock units (RSUs) | 0.2 |  | $ | 58.75 |  |
Performance stock units (PSUs) | 0.1 |  | $ | 65.28 |  |
During the nine months ended September 30, 2019 and 2018, 0.3 and 0.2 of non-qualified stock options were exercised resulting in proceeds of $11.6 and $5.8, respectively. During the nine months ended September 30, 2019 and 2018, RSUs of 0.2 vested and were issued. During the nine months ended September 30, 2019 and 2018, PSUs of 0.2 and 0.1 that vested on December 31, 2018 and 2017, respectively, were issued.

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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