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Stock-Based Compensation | 6 Months Ended
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Jun. 30, 2019
Share-based Payment Arrangement [Abstract] |
Share-based Payment Arrangement [Text Block] | Stock-Based Compensation The following table summarizes the Company's pre-tax compensation expense and related income tax benefit during the three and six months ended June 30, 2019 and 2018 related to the Company's performance units and restricted stock.
| Three Months Ended June 30, | Six Months Ended June 30,
(In millions) | 2019 | 2018 | 2019 | 2018
Performance units: |  |  |  |
Total shareholder return | $ | 2.3 |  | $ | 2.1 |  | $ | 4.5 |  | $ | 4.1 |
Earnings per share | 0.4 |  | 1.0 |  | 0.9 |  | 1.7 |
Total performance units | 2.7 |  | 3.1 |  | 5.4 |  | 5.8 |
Restricted stock | 0.2 |  | — |  | 0.5 |  | — |
Total compensation expense | $ | 2.9 |  | $ | 3.1 |  | $ | 5.9 |  | $ | 5.8 |
Income tax benefit | $ | 0.7 |  | $ | 0.8 |  | $ | 1.5 |  | $ | 1.5 |
During the three and six months ended June 30, 2019, the Company issued an immaterial amount of shares and 443,497 shares, respectively, of new common stock pursuant to the Company's Stock Incentive Plan to satisfy restricted stock grants and payouts of earned performance units.

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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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