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Fair Value Measurements Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2012
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
The fair values of non-current financial liabilities at March 31, 2012 and December 31, 2011, determined based on Level 2 inputs, were as follows:
 
 
March 31, 2012
 
December 31, 2011
 
 
Carrying
Amount
 
Fair Value
 
Carrying
Amount
 
Fair Value
 
 
(in millions)
Long-term debt, less current maturities
 
$
1,338.0

 
$
1,436.5

 
$
1,411.4

 
$
1,486.2