DEBT - SCHEDULE OF SHORT-TERM DEBT (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Short-term Debt [Line Items]
Total short-term borrowings and current portion of long-term debt	$ 135.5	$ 361.7
Zero-coupon convertible subordinated notes [Member]
Short-term Debt [Line Items]
Total short-term borrowings and current portion of long-term debt	135.5	286.7
Term loan facility [Member]
Short-term Debt [Line Items]
Total short-term borrowings and current portion of long-term debt	$ 0	$ 75.0