DERIVATIVES AND RISK MANAGEMENT ACTIVITIES Table 3 (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments, Gain (Loss)
Gain (loss) to be reclassified during next 12 months, forward starting interest rate swaps	$ 8,300
Designated as Hedging Instrument \| Fair Value Hedges \| Commodity contracts \| Cost of product sales
Derivative Instruments, Gain (Loss)
Gain (loss) recognized in income	21,589	$ 21,951	$ 3,964
Gain (loss) recognized in income on hedged item	(18,047)	(21,587)	(6,327)
Gain (loss) recognized in income on derivative (ineffective portion)	3,542	364	(2,363)
Designated as Hedging Instrument \| Cash Flow Hedges \| Interest rate swaps \| Interest expense, net
Derivative Instruments, Gain (Loss)
Gain (loss) reclassified from AOCI into income (effective portion)		(10,663)	(7,570)
Designated as Hedging Instrument \| Cash Flow Hedges \| Interest rate swaps \| Other comprehensive income
Derivative Instruments, Gain (Loss)
Gain (loss) recognized in other comprehensive income on derivative (effective portion)	1,303	0	7,213
Designated as Hedging Instrument \| Cash Flow Hedges \| Unwound interest rate swaps \| Interest expense, net
Derivative Instruments, Gain (Loss)
Gain (loss) reclassified from AOCI into income (effective portion)	(9,802)
Not Designated as Hedging Instrument \| Commodity contracts \| Cost of product sales
Derivative Instruments, Gain (Loss)
Gain (loss) recognized in income	$ 2,208	$ 18,407	$ (5,323)

Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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-Name Accounting Standards Codification
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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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