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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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