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Fair Value Disclosures (Tables)
6 Months Ended
Jun. 30, 2013
Fair Value Disclosures [Abstract]  
Financial Assets And Liabilities Measured At Fair Value
The following table presents information about our financial instruments measured at fair value on a recurring basis as of June 30, 2013 and December 31, 2012 under the fair value hierarchy discussed in Note 2, "Summary of Significant Accounting Policies and Recent Accounting Pronouncements."
 
Financial Instruments Measured at Fair Value on a Recurring Basis
 
June 30, 2013
 
December 31, 2012
(in millions)
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred compensation plan investments (1)
$
38.1

 
$

 
$

 
$
38.1

 
$
35.0

 
$

 
$

 
$
35.0

(1)
Approximately $0.8 million of participant cash was withdrawn from our deferred compensation plan investments during the six months ended June 30, 2013.
Fair Value Of Notes Receivable And Notes Payable
The following table presents the carrying and estimated fair values of our notes payable at June 30, 2013 and December 31, 2012:
 
June 30, 2013
 
December 31, 2012
(in millions)
Carrying
Value
 
Estimated
Fair  Value
 
Carrying
Value
 
Estimated
Fair  Value
Fixed rate notes payable
$
2,270.8

 
$
2,361.6

 
$
2,297.8

 
$
2,518.1

Floating rate notes payable
253.0

 
243.0

 
212.7

 
203.4