|
FAIR VALUE MEASUREMENTS (Details 2) (USD $)
In Millions, unless otherwise specified |
9 Months Ended | |||
|---|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||
| Balance at beginning of year | $ 37.6 | $ 44.9 | $ 49.0 | $ 0 |
| (Settlements) Purchases | (18.5) | 42.3 | ||
| Unrealized losses included in other (expense) income | $ 7.1 | $ 2.6 | ||