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Fair Value of Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2013
Fair Value Disclosures [Abstract]  
Schedule Of Fair Values Of Financial Assets And Liabilities Measured On A Recurring Basis
The fair values of financial assets and liabilities measured on a recurring basis were determined using the following inputs as of the dates indicated (in millions):
 
 
 
Fair Value Measurements
Using Inputs Considered as Significant
 
Fair Value as of
December 31, 2013
 
Level 1
 
Level 2
 
Level 3
Assets
 
 
 
 
 
 
 
Life insurance surrender values
$
5.3

 
$
5.3

 
 
 
 
 
 
 
 
 
 
 
 
Liabilities
 
 
 
 
 
 
 
Acquisition-related contingent consideration
$
162.9

 
 
 
 
 
$
162.9

 
 
 
 
 
 
 
 


 
 
Fair Value Measurements
Using Inputs Considered as Significant
 
Fair Value as of
December 31, 2012
 
Level 1
 
Level 2
 
Level 3
Assets
 
 
 
 
 
 
 
Life insurance surrender values
$
11.9

 
$
11.9

 
 
 
 
Auction rate securities
$
14.4

 
 
 
 
 
$
14.4



 
 
 
 
 
 
 
Liabilities
 
 
 
 
 
 
 
Acquisition-related contingent consideration
$
143.6

 
 
 
 
 
$
143.6
Schedule of Fair Values of Financial Assets And Liabilities Measured On A Non-Recurring Basis
Carrying amounts and estimated fair values of selected financial instruments measured on a non-recurring basis as of the dates indicated were as follows (in millions):
 
December 31, 2013
 
December 31, 2012
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
 
Fair
Value
4.875% Senior Notes
$
400.0

 
$
380.0

 
 
 
 
7.625% Senior Notes
 
 
 
 
$
150.0

 
$
154.9

2009 Convertible Notes
$
12.6

 
$
26.6

 
$
12.7

 
$
21.0

2011 Convertible Notes
$
198.3

 
$
428.3

 
$
193.0

 
$
338.3