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Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Depreciation expense | $ (14.3) | $ (13.3)
Deferred Tax Assets Leasing liabilities | 23.3 | 25.7
Deferred Tax Liability Leasing Asset | (22.1) | (24.8)
Allowance for doubtful accounts | 1.4 | 1.8
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation | 14.8 | 12.0
Stock-based compensation | 8.4 | 9.2
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other | 22.5 | 0.0
Other | 3.0 | 3.4
Net operating loss carryforwards - foreign | 0.8 | 0.8
Valuation allowance | (0.5) | (0.8)
Deferred Tax Liabilities, net of deferred tax assets and valuation allowance | 108.7 | 98.7
Total deferred income tax assets (liabilities) | (108.2) | (97.9)
Deferred Tax Liabilities, Goodwill and Intangible Assets | $ 146.0 | $ 112.7

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