SHAREHOLDERS' EQUITY SHAREHOLDERS' EQUITY, COMMON STOCK REPURCHASE (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 September 2012 Stock Repurchase Program [Member]	Sep. 30, 2012 September 2012 Stock Repurchase Program [Member]	Sep. 30, 2011 September 2012 Stock Repurchase Program [Member]	Sep. 30, 2012 September 2012 Stock Repurchase Program [Member]	Sep. 30, 2011 September 2012 Stock Repurchase Program [Member]	Feb. 29, 2012 February 2012 Stock Repurchase Program [Member]	Sep. 30, 2012 February 2012 Stock Repurchase Program [Member]	Sep. 30, 2011 February 2012 Stock Repurchase Program [Member]	Sep. 30, 2012 February 2012 Stock Repurchase Program [Member]	Sep. 30, 2011 February 2012 Stock Repurchase Program [Member]	Jun. 30, 2011 June 2011 Stock Repurchase Program [Member]	Sep. 30, 2012 June 2011 Stock Repurchase Program [Member]	Sep. 30, 2011 June 2011 Stock Repurchase Program [Member]	Sep. 30, 2012 June 2011 Stock Repurchase Program [Member]	Sep. 30, 2011 June 2011 Stock Repurchase Program [Member]	Jun. 30, 2010 June 2010 Stock Repurchase Program [Member]	Sep. 30, 2012 June 2010 Stock Repurchase Program [Member]	Sep. 30, 2011 June 2010 Stock Repurchase Program [Member]	Sep. 30, 2012 June 2010 Stock Repurchase Program [Member]	Sep. 30, 2011 June 2010 Stock Repurchase Program [Member]
Class of Stock [Line Items]
Stock Repurchased During Period, Shares	728,101	974,000	1,483,441	2,060,600		0	0	0	0		728,101	0	1,437,101	0		0	974,000	46,340	1,037,000		0	0	0	1,023,600
Stock Repurchased During Period, Value	$ 25.4	$ 28.3	$ 51.7	$ 61.6		$ 0	$ 0	$ 0	$ 0		$ 25.4	$ 0	$ 50.0	$ 0		$ 0	$ 28.3	$ 1.7	$ 30.4		$ 0	$ 0	$ 0	$ 31.2
Stock Repurchase Program, Authorized Amount					$ 250					$ 50					$ 50					$ 50