Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Change of One Percentage Point in Assumed Health Care Cost Trend Rates) (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Change of One Percentage Point in Assumed Health Care Cost Trend Rates) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]  
Effect on total of service and interest cost due to one percentage point increase $ 7.0
Effect on total of service and interest cost due to one percentage point decrease (5.4)
Effect on postretirement benefit obligation due to one percentage point increase 53.7
Effect on postretirement benefit obligation due to one percentage point decrease $ (43.4)