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Fair Value Disclosures (Tables) | 9 Months Ended
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Sep. 30, 2012
Fair Value Disclosures [Abstract] |
Financial Assets And Liabilities Measured At Fair Value | The following table presents information about our financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2012 and December 31, 2011 under the fair value hierarchy discussed in Footnote 2, "Summary of Significant Accounting Policies and Recent Accounting Pronouncements." Assets and Liabilities Measured at Fair Value on a Recurring Basis
| September 30, 2012 |  | December 31, 2011
(in millions) | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation plan investments (1) | $ | 38.9 |  |  | $ | — |  |  | $ | — |  |  | $ | 38.9 |  |  | $ | 41.0 |  |  | $ | — |  |  | $ | — |  |  | $ | 41.0 |
Derivative financial instruments | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 0.1 |  |  | — |  |  | 0.1 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments | $ | — |  |  | $ | 0.2 |  |  | $ | — |  |  | $ | 0.2 |  |  | $ | — |  |  | $ | 16.6 |  |  | $ | — |  |  | $ | 16.6 |
(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.
Fair Value Of Notes Receivable And Notes Payable | The following table presents the carrying and estimated fair value of our notes payable at September 30, 2012 and December 31, 2011:
| September 30, 2012 |  | December 31, 2011
(in millions) | Carrying Value |  | Estimated Fair Value |  | Carrying Value |  | Estimated Fair Value
Fixed rate notes payable | $ | 2,115.2 |  |  | $ | 2,351.5 |  |  | $ | 2,186.6 |  |  | $ | 2,304.4 |
Floating rate notes payable (1) | 278.5 |  |  | 269.8 |  |  | 245.5 |  |  | 233.6 |
(1) Includes balances outstanding under our unsecured line of credit.

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- Definition Fair Value Of Notes Receivable And Notes Payable. + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258 + Details
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