RISK MANAGEMENT ACTIVITIES (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Derivative assets and liabilities from risk management activities
Risk Management Asset	$ 2.4	$ 3.9
Risk Management Liability	3.1	9.7
Non-hedge derivatives
Derivative assets and liabilities from risk management activities
Current assets from risk management activities	2.2	1.7
Long-term assets from risk management activities	0.2	2.2
Risk Management Asset	2.4	3.9
Current liabilities from risk management activities	2.3	5.4
Long-term liabilities from risk management activities	0.8	4.3
Risk Management Liability	3.1	9.7
Non-hedge derivatives | Natural gas contracts
Derivative assets and liabilities from risk management activities
Current assets from risk management activities	0.6	0.1
Current liabilities from risk management activities	0.1	0.6
Non-hedge derivatives | FTRs
Derivative assets and liabilities from risk management activities
Current assets from risk management activities	1.5	1.2
Current liabilities from risk management activities	0.3	0.1
Non-hedge derivatives | Petroleum product contracts
Derivative assets and liabilities from risk management activities
Current assets from risk management activities	0.1	0.1
Current liabilities from risk management activities	0	0
Non-hedge derivatives | Coal contract
Derivative assets and liabilities from risk management activities
Current assets from risk management activities	0	0.3
Long-term assets from risk management activities	0.2	2.2
Current liabilities from risk management activities	1.9	4.7
Long-term liabilities from risk management activities	$ 0.8	$ 4.3
Designated as hedging instrument
Derivative assets and liabilities from risk management activities
Number of derivative instruments held	0