EQUITY (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended			34 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
Changes in common shares and treasury stock
Common stock issued, balance at end of period	206.0	205.1		206.0
Balance, end of period (in dollars )	$ 244.6	$ 89.7		$ 244.6
Common Stock
Changes in common shares and treasury stock
Common stock issued, balance at beginning of period	205.1	204.8	204.5
Stock-based compensation	0.9	0.3	0.3
Treasury stock purchases	0	0	0
Common stock issued, balance at end of period	206.0	205.1	204.8	206.0
Treasury Stock
Changes in common shares and treasury stock
Treasury stock balance at beginning of period	1.4	0.1	0
Stock-based compensation	0.2	0	0.1
Treasury stock purchases	1.9	1.3	0
Treasury stock balance at end of period	3.5	1.4	0.1	3.5
Balance, beginning of period (in dollars )	89.7	3.2	0
Stock-based compensation (in dollars )	15.2	4.9	3.1
Treasury stock purchases (in dollars )	139.7	81.6	0.1
Balance, end of period (in dollars )	244.6	89.7	3.2	244.6
Shares authorized to be repurchased (in dollars)				300.0
Shares repurchased, shares				3.2
Shares repurchased, average cost per share				$ 69.43
Remaining repurchased available under the authorization (in dollars)				$ 78.7