|
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 |