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INCOME TAXES (Details 3) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Deferred tax assets [Abstract] |  |
Pension and postretirement benefits | $ 74.6 | $ 93.3
Environmental reserves | 60.2 | 60.5
Asset retirement obligations | 25.7 | 28.6
Accrued liabilities | 48.2 | 43.1
Tax credits | 13.3 | 10.8
Federal and state net operating losses | 7.2 | 6.7
Capital loss carryforward | 3.0 | 15.5
Other miscellaneous items | 10.7 | 5.3
Total deferred tax assets | 242.9 | 263.8
Valuation allowance | (13.4) | (21.1)
Net deferred tax assets | 229.5 | 242.7
Deferred tax liabilities [Abstract] |  |
Property, plant and equipment | 182.5 | 178.9
Intangible amortization | 8.4 | 8.8
Inventory and prepaids | 3.1 | 0
Partnerships | 93.7 | 95.0
Total deferred tax liabilities | 287.7 | 282.7
Net deferred tax (liability) asset | $ (58.2) | $ (40.0)

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