UNCONSOLIDATED AFFILIATES (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Equity Method Investments [Line Items]

Schedule of Equity Method Investments

Investments in Unconsolidated Affiliates - The following table sets forth ONEOK Partners’ investments in unconsolidated affiliates for the periods indicated:

	Net Ownership Interest	December 31, 2016		December 31, 2015
		(Thousands of dollars)
Northern Border Pipeline	50%	$	328,456	$	363,231
Overland Pass Pipeline Company	50%	444,138		459,354
Other	Various	186,213		125,636
Investments in unconsolidated affiliates (a)		$	958,807	$	948,221

(a) - Equity-method goodwill (Note A) was $40.1 million at December 31, 2016 and 2015, respectively.

Equity In Net Earnings From Investments [Member]

Schedule of Equity Method Investments [Line Items]

Schedule of Equity Method Investments

Equity in Net Earnings from Investments and Impairments -The following table sets forth ONEOK Partners’ equity in net earnings from investments for the periods indicated:

	Years Ended December 31,
	2016		2015			2014
	(Thousands of dollars)
Northern Border Pipeline	$	69,990	$	66,941		$	69,819
Overland Pass Pipeline Company	53,984		37,783			25,906
Other	15,716		20,576			21,690
Equity in net earnings from investments	$	139,690	$	125,300		$	117,415
Impairment of equity investments	$	—	$	(180,583	)	$	(76,412	)

Summarized Financial Information Of Unconsolidated Affiliates [Member]

Schedule of Equity Method Investments [Line Items]

Schedule of Equity Method Investments

Unconsolidated Affiliates Financial Information - The following tables set forth summarized combined financial information of ONEOK Partners’ unconsolidated affiliates for the periods indicated:

	December 31, 2016			December 31, 2015
	(Thousands of dollars)
Balance Sheet
Current assets	$	143,317		$	149,439
Property, plant and equipment, net	$	2,579,607		$	2,556,559
Other noncurrent assets	$	20,784		$	23,722
Current liabilities	$	77,388		$	211,037
Long-term debt	$	649,539		$	425,521
Other noncurrent liabilities	$	69,265		$	69,356
Accumulated other comprehensive loss	$	(7,450	)	$	(5,669	)
Owners’ equity	$	1,954,966		$	2,029,475

	Years Ended December 31,
	2016		2015		2014
	(Thousands of dollars)
Income Statement
Operating revenues	$	578,542	$	524,496	$	548,491
Operating expenses (a)	$	260,753	$	304,930	$	309,990
Net income (a)	$	293,921	$	200,064	$	214,410
Distributions paid to us	$	196,717	$	155,918	$	139,019

(a) Includes long-lived asset impairment charges in 2015 and 2014.