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Fair Value Disclosures (Financial Assets And Liabilities Measured At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Dec. 31, 2011
Deferred compensation plan investments	$ 38.9	[1]	$ 41.0	[1]
Derivative financial instruments, Assets	0		0.1
Derivative financial instruments, Liabilities	0.2		16.6
Participant Withdrawals From Deferred Compensation Plan Investments	7.0
Level 1 [Member]
Deferred compensation plan investments	38.9	[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	0.2		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 September 30, 2012 also reflects approximately $7.0 million of participant cash withdrawals from our deferred compensation plan investment during the nine months ended September 30, 2012.

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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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-Number 133

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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