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Fair Value Measurements
9 Months Ended
Sep. 30, 2015
Fair Value Disclosures [Abstract]  
Fair Value Measurements
12. Fair Value Measurements

Recurring Fair Value Measurements. The following table presents information about our financial instruments measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014 using the inputs and 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
 
September 30, 2015
 
December 31, 2014
(in millions)
Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable Inputs (Level 3)
 
Total
 
Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable Inputs (Level 3)
 
Total
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred compensation plan investments (1)
$
51.6

 
$

 
$

 
$
51.6

 
$
56.1

 
$

 
$

 
$
56.1

(1)
Approximately $8.3 million of participant cash was withdrawn from our deferred compensation plan investments during the nine months ended September 30, 2015.

Non-recurring Fair Value Measurements. The non-recurring fair value disclosure inputs under the fair value hierarchy are discussed in Note 2, "Summary of Significant Accounting Policies and Recent Accounting Pronouncements." There were no non-recurring fair value adjustments at September 30, 2015 or December 31, 2014.

Financial Instrument Fair Value Disclosures. The following table presents the carrying and estimated fair values of our notes payable at September 30, 2015 and December 31, 2014, in accordance with the policies discussed in Note 2, "Summary of Significant Accounting Policies and Recent Accounting Pronouncements."
 
September 30, 2015
 
December 31, 2014
(in millions)
Carrying
Value
 
Estimated
Fair Value
 
Carrying
Value
 
Estimated
Fair Value
Fixed rate notes payable
$
2,283.7

 
$
2,380.3

 
$
2,533.8

 
$
2,666.1

Floating rate notes payable (1)
431.5

 
423.6

 
209.7

 
203.7

(1)
Includes balances outstanding under our unsecured credit facility and unsecured short-term borrowings.