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Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020	Dec. 31, 2020
Deferred compensation plan investments (1)	$ 132.9	[1]		$ 129.8
Participant Withdrawals From Deferred Compensation Plan Investments	9.4		$ 37.8
Level 1 [Member]
Deferred compensation plan investments (1)	132.9	[1]		129.8
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[1] Approximately $9.4 million and $37.8 million of participant cash was withdrawn from our deferred compensation plan investments during the six months ended June 30, 2021 and the year ended December 31, 2020, respectively.

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Participant withdrawals from deferred compensation plan investments

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No definition available.

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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

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