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Stock-Based Compensation (Schedule of Stock-based Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets: |  |
Diversified investments associated with the ESU program, current | $ 3.1 | $ 3.6
Diversified investments associated with the ESU program, long-term | 39.7 | 47.4
Diversified investments associated with the ESU program, total | 42.8 | 51.0
Liabilities: |  |
Share liabilities, current | 3.1 | 3.5
Share liabilities, long-term | 10.8 | 13.2
Other - primarily timing differences between employee withholdings and related employer contributions to be submitted to various plans' trust accounts, current | 5.9 | 5.6
Other - primarily timing differences between employee withholdings and related employer contributions to be submitted to various plans' trust accounts, long-term | 0.0 | 0.0
Other - primarily timing differences between employee withholdings and related employer contributions to be submitted to various plans' trust accounts, total | 5.9 | 5.6
Total liabilities associated with stock-based compensation, current | 9.0 | 12.7
Total liabilities associated with stock-based compensation, long-term | 42.2 | 51.1
Total liabilities associated with stock-based compensation, total | 51.2 | 63.8
Executive Stock Unit Program |  |
Liabilities: |  |
Share liabilities, current | 3.1 | 3.6
Share liabilities, long-term | 40.9 | 47.3
Share liabilities, total | 44.0 | 50.9
Performance Stock Unit (TSR) award |  |
Liabilities: |  |
Share liabilities, current | 0.0 | 0.0
Share liabilities, long-term | 0.6 | 1.1
Share liabilities, total | 0.6 | 1.1
Performance Stock Unit (EBIT) award |  |
Liabilities: |  |
Share liabilities, current | 0.0 | 3.5
Share liabilities, long-term | 0.7 | 2.7
Share liabilities, total | $ 0.7 | $ 6.2

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