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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes the impact of all stock-based compensation expense on our Consolidated Statements of Income for the years ended December 31, 2019, 2018 and 2017:
(in millions) | 2019 |  | 2018 |  | 2017
Selling, general and administrative expense | $ | 10.1 |  |  | $ | 8.8 |  |  | $ | 17.0 |
Loss before income tax | (10.1 | ) |  | (8.8 | ) |  | (17.0 | )
Income tax benefit | (2.4 | ) |  | (2.2 | ) |  | (6.1 | )
Net loss | $ | (7.7 | ) |  | $ | (6.6 | ) |  | $ | (10.9 | )
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan | Stock-based compensation expense by award type for the years ended December 31, 2019, 2018 and 2017 was as follows:
(in millions) | 2019 |  | 2018 |  | 2017
Stock option compensation expense | $ | 2.7 |  |  | $ | 2.0 |  |  | $ | 2.4 |
RSU compensation expense | 5.1 |  |  | 4.7 |  |  | 4.3 |
PSU compensation expense | 2.3 |  |  | 2.1 |  |  | 10.3 |
Total stock-based compensation expense | $ | 10.1 |  |  | $ | 8.8 |  |  | $ | 17.0 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model and the weighted average assumptions as outlined in the following table:
| Year Ended December 31,
| 2019 |  | 2018 |  | 2017
Weighted average expected lives | 4.6 |  | years |  | 4.8 |  | years |  | 4.8 |  | years
Weighted average risk-free interest rate | 2.49 |  | % |  | 2.62 |  | % |  | 2.04 |  | %
Weighted average expected volatility | 36.1 |  | % |  | 36.4 |  | % |  | 39.7 |  | %
Expected dividend yield | 2.65 |  | % |  | 1.87 |  | % |  | 0.00 |  | %
Weighted average grant date fair value | $ | 2.40 |  |  |  | $ | 3.76 |  |  |  | $ | 4.70 |  |
Summary of Changes in Stock Options Outstanding | A summary of the changes in stock options outstanding under the Plan during the year ended December 31, 2019 is presented below:
| Number Outstanding |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at December 31, 2018 | 4,125,067 |  |  | $ | 9.46 |  |  |  |  |
Granted | 1,303,255 |  |  | $ | 9.05 |  |  |  |  |
Exercised | (559,371 | ) |  | $ | 7.54 |  |  |  |  |
Forfeited | (451,258 | ) |  | $ | 12.01 |  |  |  |  |
Outstanding at December 31, 2019 | 4,417,693 |  |  | $ | 9.32 |  |  | 3.9 years |  | $ | 4.8 | million
Exercisable shares at December 31, 2019 | 2,468,344 |  |  | $ | 8.53 |  |  | 2.4 years |  | $ | 4.4 | million
Summary of Changes in RSUs Outstanding | A summary of the changes in the RSUs outstanding under the Plan during 2019 is presented below:
| Stock Units |  | Weighted Average Grant Date Fair Value
Outstanding at December 31, 2018 | 1,446,634 |  |  | $ | 10.72 |
Granted | 679,601 |  |  | $ | 8.74 |
Vested and distributed | (362,165 | ) |  | $ | 7.74 |
Forfeited and cancelled | (47,625 | ) |  | $ | 11.81 |
Outstanding at December 31, 2019 | 1,716,445 |  |  | $ | 10.53 |
Vested and deferred at December 31, 2019(1) | 512,525 |  |  | $ | 9.37 |
(1) Included in outstanding at December 31, 2019. Vested and deferred RSUs are primarily related to deferred compensation for non-employee directors.
Summary of Changes in PSUs Outstanding | A summary of the changes in the PSUs outstanding under the Plan during 2019 is presented below:
| Stock Units |  | Weighted Average Grant Date Fair Value
Outstanding at December 31, 2018 | 1,604,394 |  |  | $ | 9.46 |
Granted | 895,389 |  |  | $ | 8.35 |
Vested | (1,059,825 | ) |  | $ | 7.66 |
Forfeited and cancelled | (34,384 | ) |  | $ | 11.27 |
Other - decrease due to performance of PSUs | (384,031 | ) |  | $ | 10.32 |
Outstanding at December 31, 2019 | 1,021,543 |  |  | $ | 9.98 |

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