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Stock-Based Compensation | 3 Months Ended
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Mar. 31, 2021
Share-based Payment Arrangement [Abstract] |
Stock-Based Compensation | Stock-Based Compensation The Company’s stock-based compensation expense for the three months ended March 31, 2021 and 2020 included PRSUs, non-qualified stock options, RSUs and deferred stock units ("DSUs"). A summary of the Company’s stock-based compensation expense is presented in the following table:
| Three Months Ended March 31, |  |
(in millions) | 2021 |  | 2020 |  |  |  |
PRSU expense | $ | 9.6 |  |  | $ | 0.3 |  |  |  |  |
Option expense | 0.4 |  |  | 1.2 |  |  |  |  |
RSU/DSU expense | 5.1 |  |  | 5.8 |  |  |  |  |
Total stock-based compensation expense | $ | 15.1 |  |  | $ | 7.3 |  |  |  |  |
The Company grants PRSUs to executive officers and certain members of management. Actual payout under the PRSUs is dependent upon the achievement of certain financial goals. During the first quarter of 2021, the Company granted PRSUs as a component of the long-term incentive plan ("2021 PRSUs"). The Company has recorded stock-based compensation expense related to the 2021 PRSUs during the three months ended March 31, 2021, as it was probable that the Company would achieve the specified performance target for the performance period.

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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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- References No definition available. + Details
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