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Income Taxes (Reconciliation Of Gross Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |
Gross unrecognized tax benefits at January 1 | $ 16.0 | $ 23.7
Increases in tax positions for prior years | 0.1 | 0.1
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | 0.0 | (1.3)
Increases in tax positions for current year | 1.4 | 1.1
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 0.0 | (1.2)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | (2.4) | (6.4)
Gross unrecognized tax benefits at December 31 | $ 15.1 | $ 16.0

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