REPURCHASES OF COMMON STOCK (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased (in shares)	1.5	0.4	4.1	1.5
Common stock repurchased	$ 66.3	$ 17.2	$ 179.6	$ 51.0