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Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022		Mar. 31, 2021	Dec. 31, 2021
Deferred compensation plan investments (1)	$ 131.4	[1]		$ 137.3
Participant Withdrawals From Deferred Compensation Plan Investments	2.6		$ 10.6
Level 1 [Member]
Deferred compensation plan investments (1)	131.4	[1]		137.3
Level 2 [Member]
Deferred compensation plan investments (1)	0.0	[1]		0.0
Level 3 [Member]
Deferred compensation plan investments (1)	$ 0.0	[1]		$ 0.0
[1] Approximately $2.6 million and $10.6 million of participant cash was withdrawn from our deferred compensation plan investments during the three months ended March 31, 2022 and the year ended December 31, 2021, respectively.

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Participant withdrawals from deferred compensation plan investments

+ References

No definition available.

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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

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