SHAREHOLDERS' EQUITY (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			18 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Jul. 21, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised (in shares)	0.1	0.5	0.2
Total value of stock options exercised	$ 1.4	$ 9.3	$ 3.1
Shares issued in connection with CEOP Plan (in shares)	0	0	0.6
Value of common shares for issued CEOP	0	0	10.2
Authorized share repurchase program (in shares)					5
Stock repurchase program period in force (in years)					3
Common stock repurchased and retired (in shares)	0.2	0.2		0.4
Value of common stock repurchased and retired	3.1	4.2
Remaining shares authorized to be purchased (in shares)	4.6			4.6
Foreign currency translation adjustment [Roll Forward]
Beginning balance	1.8	0.4	(0.5)
Unrealized gains (losses)	0.3	1.4	0.9
Ending balance	2.1	1.8	0.4	2.1
Unrealized gains (losses) on derivative contracts (net of taxes) [Roll Forward]
Beginning balance	(5.3)	11.6	11.6
Unrealized gains (losses)	6.0	(10.6)	5.4
Reclassification adjustments into income	4.0	(6.3)	(5.4)
Ending balance	4.7	(5.3)	11.6	4.7
Pension and postretirement benefits (net of taxes) [Roll Forward]
Beginning balance	(290.7)	(273.8)	(259.3)
Unrealized gains (losses)	(101.9)	(29.0)	(26.0)
Reclassification adjustments into income	14.5	12.1	11.5
Ending balance	(378.1)	(290.7)	(273.8)	(378.1)
Accumulated other comprehensive loss [Roll Forward]
Beginning balance	(294.2)	(261.8)	(248.2)
Unrealized gains (losses)	(95.6)	(38.2)	(19.7)
Reclassification adjustments into income	18.5	5.8	6.1
Ending balance	(371.3)	(294.2)	(261.8)	(371.3)
Deferred tax (benefit) provision on unrealized gains and losses on derivative contracts	6.4	(10.7)	0
Deferred tax (benefit) provision on pension and postretirement benefits	$ (56.0)	$ (10.2)	$ (9.1)