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Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |  |
Unrecognized tax benefits at January 1 | $ 41.8 | $ 41.7 | $ 38.7
Additions for tax positions of the current year | 13.4 | 10.2 | 10.0
Additions for tax positions of prior years | 0.9 | 0.1 | 0.0
Reductions for tax positions of prior years | 0.0 | 0.0 | 0.0
Settlements | 0.0 | 4.6 | 2.3
Reductions as a result of a lapse of the statute of limitations | (6.7) | (5.6) | (4.7)
Unrecognized tax benefits at December 31 | $ 49.4 | $ 41.8 | $ 41.7

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