Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Narrative) (Details)

v2.4.0.8
FAIR VALUE MEASUREMENTS (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2013
7% Senior Notes Due 2020 [Member]
Dec. 31, 2012
7% Senior Notes Due 2020 [Member]
Jun. 30, 2013
8.125% Senior Notes due 2018 [Member]
Dec. 31, 2012
8.125% Senior Notes due 2018 [Member]
Jun. 30, 2013
2.875% Convertible Senior Notes due 2027 [Member]
Dec. 31, 2012
2.875% Convertible Senior Notes due 2027 [Member]
Jun. 30, 2013
Fixed Rate Debt With Noncontrolling Interest Partner [Member]
Dec. 31, 2012
Fixed Rate Debt With Noncontrolling Interest Partner [Member]
Fair Value Disclosures [Abstract]                  
Impairment related to definite-lived intangible assets $ 13.9                
Debt Fair Value [Line Items]                  
Interest rate, stated percentage (in hundredths)   7.00% 7.00% 8.125% 8.125% 2.875% 2.875%    
Estimated fair values of senior notes   238.4 236.3 266.4 273.4        
Estimated fair values of convertible senior notes           222.5 219.4    
Fair value, estimate not practicable [Abstract]                  
Face amount of debt               $ 23.4 $ 24.5