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
Sep. 30, 2014
2.5% Convertible Senior Notes Due 2019 [Member]
May 31, 2014
2.5% Convertible Senior Notes Due 2019 [Member]
Sep. 30, 2014
2.875% Convertible Senior Notes Due 2027 [Member]
Jul. 31, 2014
2.875% Convertible Senior Notes Due 2027 [Member]
Dec. 31, 2013
2.875% Convertible Senior Notes Due 2027 [Member]
Sep. 30, 2014
Level 2 [Member]
2.5% Convertible Senior Notes Due 2019 [Member]
Dec. 31, 2013
Level 2 [Member]
2.875% Convertible Senior Notes Due 2027 [Member]
Sep. 30, 2014
7% Senior Notes due 2020 [Member]
Level 2 [Member]
Dec. 31, 2013
7% Senior Notes due 2020 [Member]
Level 2 [Member]
Sep. 30, 2014
5.375% Senior Notes due 2022 [Member]
Level 2 [Member]
Sep. 30, 2014
Fixed Rate Debt With Noncontrolling Interest Partner [Member]
Dec. 31, 2013
Fixed Rate Debt With Noncontrolling Interest Partner [Member]
Debt Fair Value [Line Items]                        
Interest rate, stated percentage 2.50% 2.50% 2.875% 2.875% 2.875% 2.50% 2.875% 7.00% 7.00% 5.375%    
Estimated fair values of senior notes               $ 452.9 $ 461.9 $ 249.4    
Estimated fair values of convertible senior notes           283.9 223.0          
Fair value, estimate not practicable [Abstract]                        
Face amount of debt                     $ 31.3 $ 34.6