Fair Value Disclosures (Financial Assets And Liabilities Measured At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Dec. 31, 2011
Deferred compensation plan investments	$ 40.0	[1]	$ 41.0	[1]
Derivative financial instruments, Assets	0		0.1
Derivative financial instruments, Liabilities	11.6		16.6
Participant Withdrawals From Deferred Compensation Plan Investments	9.3
Level 1 [Member]
Deferred compensation plan investments	40.0	[1]	41.0	[1]
Derivative financial instruments, Assets	0		0
Derivative financial instruments, Liabilities	0		0
Level 2 [Member]
Deferred compensation plan investments	0	[1]	0	[1]
Derivative financial instruments, Assets	0		0.1
Derivative financial instruments, Liabilities	11.6		16.6
Level 3 [Member]
Deferred compensation plan investments	0	[1]	0	[1]
Derivative financial instruments, Assets	0		0
Derivative financial instruments, Liabilities	$ 0		$ 0

[1] (1) The balance at March 31, 2012 also reflects approximately $9.3 million of participant withdrawals from our deferred compensation plan investment during the quarter.