DISCONTINUED OPERATIONS (Tables)

9 Months Ended

Sep. 30, 2016

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Restructuring and Related Costs [Table Text Block]

The following table summarizes the change in our liability related to released capacity contracts for the periods indicated:

	Nine Months Ended
	September 30,
	2016			2015
	(Millions of dollars)
Beginning balance	$	36.3		$	73.8
Settlements	(16.2		)	(31.2		)
Accretion	0.4			0.8
Ending balance	$	20.5		$	43.4