Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Deferred compensation plan investments (1)	$ 60.2	[1]	$ 56.1
Participant Withdrawals From Deferred Compensation Plan Investments	2.2
Level 1 [Member]
Deferred compensation plan investments (1)	60.2	[1]	56.1
Level 2 [Member]
Deferred compensation plan investments (1)	0	[1]	0
Level 3 [Member]
Deferred compensation plan investments (1)	$ 0	[1]	$ 0

[1] Approximately $2.2 million of participant cash was withdrawn from our deferred compensation plan investments during the three months ended March 31, 2015.