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Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Deferred compensation plan investments | $ 120.7 | [1] | $ 137.3
Participant Withdrawals From Deferred Compensation Plan Investments | 3.6 |  | 10.6
Level 1 [Member] |  |  |
Deferred compensation plan investments | 120.7 |  | 137.3
Level 2 [Member] |  |  |
Deferred compensation plan investments | 0.0 |  | 0.0
Level 3 [Member] |  |  |
Deferred compensation plan investments | $ 0.0 |  | $ 0.0
[1] | Approximately $3.6 million and $10.6 million of participant cash was withdrawn from our deferred compensation plan investments during the years ended December 31, 2022 and 2021, respectively.

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- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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