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Income Taxes (Schedule Of Gross Unrecognized Tax Benefits Reconciliation) (Details) - USD ($) $ in Millions | 12 Months Ended |
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Balance of liability as of January 1, | $ 31.6 | $ 34.0 | $ 39.8 | $ 42.0
Increase as a result of tax positions taken during a prior year | 0.7 | 5.4 | 1.1 |
Decrease as a result of tax positions taken during a prior year | (0.3) | (0.4) | (0.5) |
Increase as a result of tax positions taken during the current year | 2.6 | 1.8 | 3.2 |
Decrease as a result of settlements with taxing authorities | (0.8) | (2.5) | 0.0 |
Reduction as a result of a lapse of the statute of limitations | (4.6) | (10.1) | (6.0) |
Balance of liability as of December 31, | $ 31.6 | $ 34.0 | $ 39.8 | $ 42.0

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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