Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details Textual)

v2.4.0.6
Fair Value Measurements (Details Textual) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Fair Value Measurements (Textual) [Abstract]    
Stated Interest rate on debt agreement 5.00% 5.00%
9.0% Senior Subordinate Note due 2018 [Member]
   
Fair Value Measurements (Textual) [Abstract]    
Stated Interest rate on debt agreement 9.00%  
5.0% Convertible Senior Note due 2029 [Member]
   
Fair Value Measurements (Textual) [Abstract]    
Stated Interest rate on debt agreement 5.00%  
7.0% Senior Subordinated Notes due 2022 [Member]
   
Fair Value Measurements (Textual) [Abstract]    
Stated Interest rate on debt agreement 7.00%  
Cash flow swaps designated as hedges [Member]
   
Fair Value Measurements (Textual) [Abstract]    
Amount included in other accrued liabilities 11.4 10.4
Amount included in other long-term liabilities 20.0 22.1
Cash flow swaps not designated as hedges [Member]
   
Fair Value Measurements (Textual) [Abstract]    
Amount included in other accrued liabilities 0.7 2.8
Amount included in other long-term liabilities 2.2 2.3