Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015		Dec. 31, 2014
Deferred compensation plan investments (1)	$ 51.6	[1]	$ 56.1
Participant Withdrawals From Deferred Compensation Plan Investments	8.3
Level 1 [Member]
Deferred compensation plan investments (1)	51.6	[1]	56.1
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[1] Approximately $8.3 million of participant cash was withdrawn from our deferred compensation plan investments during the nine months ended September 30, 2015.