POSTRETIREMENT BENEFITS (Detail Textuals) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Amortization of Net Gains (Losses)	$ 30
Shareholders' Equity Charges
Pretax amount of after-tax charge recorded in shareholders' equity	162.0	41.8	38.7
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Amortization of Net Gains (Losses)	4
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0	0	0.2
Shareholders' Equity Charges
After-tax charge to shareholders' equity for other postretirement plans	2.9	3.1
Pretax amount of after-tax charge recorded in shareholders' equity	4.8	5.0	3.6
Par outstanding value of non-callable zero coupon bond used to determine the hypothetical yield curve	250
Defined Benefit Plan, Expected Future Benefit Payments in Year One	6.0
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	6.0
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	6.0
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	6.0
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	$ 6.0