UNCONSOLIDATED AFFILIATES (Tables)

9 Months Ended

Sep. 30, 2018

Equity In Net Earnings From Investments

Schedule of Equity Method Investments [Line Items]

Schedule of Equity Method Investments [Table Text Block]

The following table sets forth our equity in net earnings from investments for the periods indicated:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2018		2017			2018		2017
	(Thousands of dollars)
Northern Border Pipeline	$	16,486	$	16,440		$	48,863	$	50,879
Overland Pass Pipeline Company	16,081		15,793			48,714		44,243
Roadrunner Gas Transmission	6,303		4,898			16,803		14,192
Other	443		2,927			1,690		9,671
Equity in net earnings from investments	$	39,313	$	40,058		$	116,070	$	118,985
Impairment of equity investments	$	—	$	(4,270	)	$	—	$	(4,270	)

Unconsolidated Affiliates Financial Information

Schedule of Equity Method Investments [Line Items]

Schedule of Equity Method Investments [Table Text Block]

The following table sets forth summarized combined financial information of our unconsolidated affiliates for the periods indicated:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(Thousands of dollars)
Income Statement
Operating revenues	$	160,962	$	163,627	$	471,641	$	475,510
Operating expenses	$	69,004	$	69,740	$	205,525	$	206,141
Net income	$	85,361	$	87,330	$	247,754	$	260,533
Distributions paid to us	$	47,197	$	49,414	$	145,437	$	146,094