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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Summary of Components of Stock-Based and Stock-Related Compensation | The following table recaps the impact of stock-based compensation on the results of operations for each of the periods presented:
| Three Months Ended March 31, 2024 |  | Three Months Ended March 31, 2023
| To be settled with stock |  | To be settled in cash |  | To be settled with stock |  | To be settled in cash
Executive Stock Unit (ESU) Program matching contributions | $ | .6 |  |  | $ | .2 |  |  | $ | .7 |  |  | $ | .1 |
Discounts on various stock awards: |  |  |  |  |  |  |
Deferred Stock Compensation Program | .4 |  |  | — |  |  | .3 |  |  | — |
ESU Program | .3 |  |  | — |  |  | .2 |  |  | — |
Discount Stock Plan | .2 |  |  | — |  |  | .2 |  |  | — |
Performance Stock Unit (PSU) awards | (.2) |  |  | (.5) |  |  | 1.1 |  |  | .7 |
Restricted Stock Unit (RSU) awards | 6.3 |  |  | — |  |  | 5.3 |  |  | — |
Other, primarily non-employee directors restricted stock | .4 |  |  | — |  |  | .4 |  |  | — |
Total stock-based compensation expense (income) | 8.0 |  |  | $ | (.3) |  |  | 8.2 |  |  | $ | .8 |
Employee contributions for above stock plans | 2.0 |  |  |  |  | 1.5 |  |  |
Total stock-based compensation | $ | 10.0 |  |  |  |  | $ | 9.7 |  |  |
Tax benefits on stock-based compensation expense | $ | 2.0 |  |  |  |  | $ | 2.0 |  |  |
Tax (expense)/benefits on stock-based compensation payments | (.8) |  |  |  |  | .3 |  |  |
Total tax benefits associated with stock-based compensation | $ | 1.2 |  |  |  |  | $ | 2.3 |  |  |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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