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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, 2021 | Dec. 31, 2020
Deferred compensation plan investments | $ 137.3 | [1] | $ 129.8
Participant Withdrawals From Deferred Compensation Plan Investments | 10.6 |  | 37.8
Level 1 [Member] |  |  |
Deferred compensation plan investments | 137.3 |  | 129.8
Level 2 [Member] |  |  |
Deferred compensation plan investments | 0.0 |  | 0.0
Level 3 [Member] |  |  |
Deferred compensation plan investments | $ 0.0 |  | $ 0.0
[1] | Approximately $10.6 million and $37.8 million of participant cash was withdrawn from our deferred compensation plan investments during the years ended December 31, 2021 and 2020, respectively.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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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