XML 32 R37.htm IDEA: XBRL DOCUMENT v2.4.0.6
Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2013
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured at Fair Value on a Recurring Basis
The following table presents the fair value hierarchy for those assets measured at fair value on a recurring basis (in millions):
 
 
Quoted Prices in Active Markets for
Identical Assets (Level 1)
 
As of March 31, 2013
 
As of December 31, 2012
Investment in marketable equity securities (1)
$
9.5

 
$
10.6

 
(1) 
Investment in marketable equity securities is recorded in Other assets, net in the accompanying Consolidated Balance Sheets.
Other Fair Value Measurements
The estimated fair values of our Senior unsecured notes were as follows (in millions):
 
 
Quoted Prices in Active Markets for
Similar Instruments (Level 2)
 
As of March 31, 2013
 
As of December 31, 2012
Senior unsecured notes
$
213.6

 
$
212.3