ONEOK (OKE) 10-Q 7 May 14 2014 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 29, 2014
Document Information [Line Items]	'	'
Entity Registrant Name	'ONEOK INC /NEW/	'
Entity Central Index Key	'0001039684	'
Current Fiscal Year End Date	'--12-31	'
Entity Well-known Seasoned Issuer	'Yes	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	207,868,687
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Commodity sales	$2,806,729	$2,198,794
Services	356,567	319,161
Total revenues	3,163,296	2,517,955
Cost of sales and fuel	2,652,669	2,146,848
Net margin	510,627	371,107
Operating expenses	'	'
Operations and maintenance	126,726	121,405
Depreciation and amortization	67,414	55,283
General Taxes	22,385	19,730
Total operating expenses	216,525	196,418
Gain (loss) on sale of assets	15	41
Operating income	294,117	174,730
Equity earnings from investments (Note K)	33,659	25,855
Allowance for equity funds used during construction	10,971	9,087
Other income	1,409	5,622
Other expense	-25,534	-1,501
Interest expense (net of capitalized interest of $15,768 and $12,605, respectively)	-94,901	-64,486
Income before income taxes	219,721	149,307
Income taxes	-14,984	-38,804
Income from continuing operations	204,737	110,503
Income from discontinued operations, net of tax (Note B)	1,774	55,202
Net income	206,511	165,705
Less: Net income attributable to noncontrolling interests	112,996	53,184
Net income attributable to ONEOK	93,515	112,521
Amounts attributable to ONEOK:	'	'
Income from continuing operations	91,741	57,319
Income from discontinued operations	1,774	55,202
Net income	$93,515	$112,521
Basic earnings per share:	'	'
Income from continuing operations (Note I)	$0.44	$0.28
Income from discontinued operations	$0.01	$0.27
Net income	$0.45	$0.55
Diluted earnings per share:	'	'
Income from continuing operations (Note I)	$0.44	$0.27
Income from discontinued operations	$0.01	$0.27
Net income	$0.45	$0.54
Average shares (thousands)	'	'
Basic	209,130	205,479
Diluted	210,166	209,458
Dividends declared per share of common stock	$0.40	$0.36

CONSOLIDATED_STATEMENTS_OF_INC1

CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest Costs, Capitalized During Period	$15,768	$12,605

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]	'	'
Net income	$206,511	$165,705
Other comprehensive income (loss), net of tax	'	'
Unrealized gains (losses) on energy marketing and risk-management assets/liabilities, net of tax of $10,228 and $3,958, respectively	-49,926	-13,652
Realized (gains) losses in net income, net of tax of $(13,017) and $(4,695), respectively	37,527	7,295
Unrealized holding gains (losses) on available-for-sale securities, net of tax of $12 and $38, respectively	-76	-62
Change in pension and postretirement benefit plan liability, net of tax of $(2,567) and $4,708 respectively	3,851	-7,462
Total other comprehensive income (loss), net of tax	-8,624	-13,881
Comprehensive income	197,887	151,824
Less: Comprehensive income attributable to noncontrolling interests	95,687	45,658
Comprehensive income attributable to ONEOK	$102,200	$106,166

CONSOLIDATED_STATEMENTS_OF_COM1

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Parenthetical (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Other comprehensive income (loss), net of tax	'	'
Unrealized gains (losses) on energy marketing and risk-management assets/liabilities, tax	$10,228	$3,958
Realized losses (gains) in net income, tax	-13,017	-4,695
Unrealized holding gains (losses) on available-for-sale securities, tax	12	38
Change in pension and postretirement benefit plan liability, tax	($2,567)	$4,708

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$210,227	$145,565
Accounts receivable, net	883,673	1,109,510
Natural gas and natural gas liquids in storage	231,237	188,286
Commodity imbalances	82,979	80,481
Other current assets	102,089	133,010
Assets of discontinued operations (Note B)	146,122	747,872
Total current assets	1,656,327	2,404,724
Property, plant and equipment	'	'
Property, plant and equipment	11,313,498	10,970,256
Accumulated depreciation and amortization	1,802,704	1,738,302
Net property, plant and equipment	9,510,794	9,231,954
Investments and other assets	'	'
Investments in unconsolidated affiliates (Note K)	1,229,054	1,229,838
Goodwill and intangible assets	1,021,620	1,024,562
Other assets	202,626	224,353
Assets of discontinued operations (Note B)	32,713	3,626,050
Total investments and other assets	2,486,013	6,104,803
Total assets	13,653,134	17,741,481
Current liabilities	'	'
Current maturities of long-term debt	10,650	10,650
Notes payable (Note E)	125,000	564,462
Accounts payable	1,155,114	1,273,102
Commodity imbalances	216,750	213,577
Accrued interest	102,831	109,099
Other current liabilities	127,697	103,752
Liabilities of discontinued operations (Note B)	153,682	455,688
Total current liabilities	1,891,724	2,730,330
Long-term debt, excluding current maturities (Note F)	7,199,029	7,753,657
Deferred credits and other liabilities	'	'
Deferred income taxes	1,144,348	1,146,562
Other deferred credits	229,277	217,522
Liabilities of discontinued operations (Note B)	61,049	1,048,230
Total deferred credits and other liabilities	1,434,674	2,412,314
Commitments and contingencies (Note M)	'	'
ONEOK shareholders' equity:	'	'
Common stock, $0.01 par value: authorized 600,000,000 shares; issued 245,811,180 shares and outstanding 207,865,891 shares at March 31, 2014; issued 245,811,180 shares and outstanding 206,618,877 shares at December 31, 2013	2,458	2,458
Paid-in capital	1,377,023	1,433,600
Accumulated other comprehensive loss (Note H)	-109,913	-121,987
Retained earnings	280,242	2,020,815
Treasury stock, at cost: 37,945,289 shares at March 31, 2014, and 39,192,203 shares at December 31, 2013	-965,310	-997,035
Total ONEOK shareholders' equity	584,500	2,337,851
Noncontrolling interests in consolidated subsidiaries	2,543,207	2,507,329
Total equity	3,127,707	4,845,180
Total liabilities and equity	$13,653,134	$17,741,481

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS Parenthetical (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Common stock, shares, par value (in dollars per share)	$0.01	$0.01
Common stock, shares, authorized (in shares)	600,000,000	600,000,000
Common stock, shares, issued (in shares)	245,811,180	245,811,180
Common stock, shares, outstanding (in shares)	207,865,891	206,618,877
Treasury stock, shares (in shares)	37,945,289	39,192,203

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating Activities	'	'
Net income	$206,511	$165,705
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	78,768	90,221
Charges attributable to exit activities	1,739	0
Equity earnings from investments	-33,659	-25,855
Distributions received from unconsolidated affiliates	30,345	23,495
Deferred income taxes	16,301	68,107
Share-based compensation expense	4,450	16,756
Pension and postretirement benefit expense, net of contributions	8,502	18,381
Allowance for equity funds used during construction	-10,971	-9,087
Gain on sale of assets	-15	-41
Other	0	-2,227
Changes in assets and liabilities:	'	'
Accounts receivable	112,780	90,953
Natural gas and natural gas liquids in storage	63,844	214,541
Accounts payable	27,817	-103,690
Commodity imbalances, net	3,555	-56,301
Settlement of exit activities liabilities	-12,176	0
Accrued interest	-6,397	14,288
Other assets and liabilities, net	-1,011	-33,748
Cash provided by operating activities	490,383	471,498
Investing Activities	'	'
Capital expenditures (less allowance for equity funds used during construction)	-429,525	-501,065
Acquisition	-14,000	0
Contributions to unconsolidated affiliates	-627	-3,036
Distributions received from unconsolidated affiliates	4,725	6,698
Proceeds from sale of assets	93	2,596
Cash used in investing activities	-439,334	-494,807
Financing Activities	'	'
Repayment of notes payable, net	-439,462	-265,920
Issuance of ONE Gas, Inc. debt, net of discounts	1,199,994	0
ONE Gas, Inc. long-term debt financing costs	-9,663	0
Repayment of debt	-551,933	-1,975
Issuance of common stock	3,020	2,831
Issuance of common units, net of issuance costs	52,839	12,819
Dividends paid	-83,275	-73,781
Cash included in discontinued operations	60,000	0
Distributions to noncontrolling interests	-101,655	-90,336
Cash provided by (used in) financing activities	9,865	-416,362
Change in cash and cash equivalents	60,914	-439,671
Change in cash and cash equivalents included in discontinued operations	3,748	-2,372
Change in cash and cash equivalents included in continuing operations	64,662	-442,043
Cash and cash equivalents at beginning of period	145,565	579,578
Cash and cash equivalents at end of period	$210,227	$137,535

CONSOLIDATED_STATEMENT_OF_CHAN

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $)	Total	Common Stock [Member]	Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interests in Consolidated Subsidiaries [Member]
In Thousands, except Share data
Stockholders' equity, beginning balance at Dec. 31, 2012	$4,232,450	'	'	'	'	'	$2,102,841
Net income	165,705	'	'	'	'	'	53,184
Other comprehensive income (loss)	-13,881	'	'	'	'	'	-7,526
Common stock issued	2,831	'	'	'	'	'	0
Common stock dividends - $0.40 per share	-73,781	'	'	'	'	'	0
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	14,572	'	'	'	'	'	11,616
Distribution of ONE Gas to shareholders (Note B)	0	'	'	'	'	'	0
Distributions to noncontrolling interests	-90,336	'	'	'	'	'	-90,336
Other	-33,427	'	'	'	'	'	0
Stockholders' equity, ending balance at Mar. 31, 2013	4,204,133	'	'	'	'	'	2,069,779
Stockholders' equity, beginning balance at Dec. 31, 2013	4,845,180	2,458	1,433,600	-121,987	2,020,815	-997,035	2,507,329
Common stock issued, beginning balance (in shares) at Dec. 31, 2013	'	245,811,180	'	'	'	'	'
Net income	206,511	0	0	0	93,515	0	112,996
Other comprehensive income (loss)	-8,624	0	0	8,685	0	0	-17,309
Common stock issued	7,579	0	-24,146	0	0	31,725	0
Common stock issued (in shares)	'	0	'	'	'	'	'
Common stock dividends - $0.40 per share	-83,275	0	0	0	-83,275	0	0
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	52,842	0	11,000	0	0	0	41,846
Distribution of ONE Gas to shareholders (Note B)	-1,747,424	0	0	3,389	-1,750,813	0	0
Distributions to noncontrolling interests	-101,655	0	0	0	0	0	-101,655
Other	-43,427	0	-43,427	0	0	0	0
Stockholders' equity, ending balance at Mar. 31, 2014	$3,127,707	$2,458	$1,377,023	($109,913)	$280,242	($965,310)	$2,543,207
Common stock issued, ending balance (in shares) at Mar. 31, 2014	'	245,811,180	'	'	'	'	'

CONSOLIDATED_STATEMENT_OF_CHAN1

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY Parenthetical (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Stockholders' Equity [Abstract]	'	'
Common Stock, Dividends, Per Share, Cash Paid	$0.40	$0.36

SUMMARY_OF_SIGNIFICANT_ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	A.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Our accompanying unaudited consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC. These statements have been prepared in accordance with GAAP and reflect all adjustments that, in our opinion, are necessary for a fair presentation of the results for the interim periods presented.  All such adjustments are of a normal recurring nature. The 2013 year-end consolidated balance sheet data was derived from our audited financial statements but does not include all disclosures required by GAAP.  These unaudited consolidated financial statements should be read in conjunction with our audited consolidated financial statements in our Annual Report.
	Our significant accounting policies are consistent with those disclosed in Note A of the Notes to Consolidated Financial Statements in our Annual Report.
	Organization and Nature of Operations - On January 31, 2014, we completed the separation of our natural gas distribution business into a stand-alone publicly traded company called ONE Gas. On March 31, 2014, we completed the accelerated wind down of our energy services business. ONEOK and its subsidiaries continue to be the sole general partner and own limited partner units of ONEOK Partners (NYSE: OKS), which together represented an aggregate 41.0 percent interest in ONEOK Partners at March 31, 2014. The results of operations for our former natural gas distribution and energy services businesses have been classified as discontinued operations for all periods presented. See Note B for additional information.
	Unless indicated otherwise, the information in the Notes to the Consolidated Financial Statements relates to our continuing operations.
	Change in Reportable Segments - Following the separation of our natural gas distribution business into ONE Gas and wind down of our energy services business, our chief operating decision maker reviews the financial performance of each of the three businesses of ONEOK Partners on a regular basis to assess the performance of, and allocate resources to, ONEOK Partners. As a result, our reportable segments have changed to reflect the three business segments of ONEOK Partners, which include the following:
	•	the Natural Gas Gathering and Processing segment, which gathers, treats and processes natural gas;
	•	the Natural Gas Liquids segment, which gathers, treats, fractionates and transports NGLs and stores, markets and distributes NGL products; and
	•	the Natural Gas Pipelines segment, which operates regulated interstate and intrastate natural gas transmission pipelines and natural gas storage facilities.
	We have reflected the change in reporting segments for all periods presented. See Note N for additional information.
	Income Taxes - Deferred income taxes are recorded for the difference between the financial statement and income tax basis of assets and liabilities and carryforward items, based on income tax laws and rates existing at the time the temporary differences are expected to reverse. Deferred tax liabilities and deferred income tax expense were reduced by $34.6 million in the first quarter 2014 due to a reduction in our estimate of the effective state income tax rate to reflect a change in the mix of taxable income in the states in which we now operate, resulting from the separation of our former natural gas distribution business and the wind down of our energy services business. We also recorded a valuation allowance of $8.2 million for state tax credits as it is more likely than not that we will not be able to utilize these credits as a result of the separation of our former natural gas distribution business and the wind down of our energy services business. Together, these adjustments resulted in a net $26.4 million reduction in deferred tax liabilities and deferred income tax expense.
	Recently Issued Accounting Standards Update - In April 2014, the FASB issued ASU 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity,” which alters the definition of a discontinued operation to include only asset disposals that represent a strategic shift with a major effect on an entity's operations and financial results.  The amendments also require more extensive disclosures about a discontinued operation’s assets, liabilities, income, expenses and cash flows. This guidance will be effective for interim and annual periods for all assets that are disposed of or classified as being held for sale in fiscal years that begin on or after December 15, 2014. We will adopt this guidance beginning in the first quarter 2015, and we are evaluating the impact on us.

DISCONTINUED_OPERATIONS

DISCONTINUED OPERATIONS	3 Months Ended
	Mar. 31, 2014
Discontinued Operations [Abstract]	'
DISCONTINUED OPERATIONS	'
	B.	DISCONTINUED OPERATIONS
	Separation of ONE Gas - On January 31, 2014, we completed the separation of ONE Gas. ONE Gas consists of ONEOK’s former natural gas distribution business that includes Kansas Gas Service, Oklahoma Natural Gas and Texas Gas Service. ONEOK shareholders of record at the close of business on January 21, 2014, retained their shares of ONEOK stock and received one share of ONE Gas stock for every four shares of ONEOK stock owned in a transaction that was tax-free to ONEOK and its shareholders. ONE Gas shares were distributed following the close of business on January 31, 2014. We retained no ownership interest in ONE Gas. On the date of the separation, ONE Gas consisted of approximately $4.3 billion of assets, $2.6 billion of liabilities and $1.7 billion of equity, and the separation was accounted for as a noncash activity. These balances included certain estimates that we expect to be finalized in the second quarter of 2014.
	Wind Down of Energy Services Business - On March 31, 2014, we completed the accelerated wind down of our energy services business. We executed an agreement to release a nonaffiliated, third-party natural gas storage contract to a third party, resulting in a noncash charge of $1.7 million for the three months ended March 31, 2014. All of the remaining natural gas transportation and storage contracts not previously released or assigned expired on their own terms on or before March 31, 2014. Our energy services business continued to serve its contracted premium-services until these remaining contracts expired on or before March 31, 2014. Our energy services business was classified as discontinued operations, effective at the close of business March 31, 2014, when substantially all operations ceased.
	The following table summarizes the change in our liability related to released capacity contracts for the period indicated:
		Three Months Ended
		31-Mar-14
		(Millions of dollars)
	Beginning balance	$	122
	Noncash charges	1.7
	Settlements	(12.8		)
	Accretion	0.6
	Ending balance	$	111.5
	We expect future cash payments associated with previously released transportation and storage capacity from the wind down of our energy services business to be approximately $68 million on an after-tax basis, with approximately $23 million paid in the remainder of 2014, $23 million in 2015, $11 million in 2016 and $11 million over the period 2017 through 2023. These cash flows are not considered direct cash flows of the continuing entities of ONEOK, as they are contractually obligated payments of the discontinued business, are not generating any further expenses in the results of operations and are not part of the operations of our continuing entities.
	Results of Operations of Discontinued Operations - The results of operations for our former natural gas distribution and energy services businesses have been reported as discontinued operations for all periods presented. The tables below provide selected financial information reported in discontinued operations in the Consolidated Statements of Income:
			Three Months Ended
			31-Mar-14
			Natural Gas				Energy			Total
			Distribution				Services
			(Thousands of dollars)
	Revenues		$	287,249			$	353,404		$	640,653
	Cost of sales and fuel		190,893				364,648			555,541
	Net margin		96,356				(11,244		)	85,112
	Operating costs		59,431			(a)	3,127			62,558
	Depreciation and amortization		11,035				319			11,354
	Operating income (loss)		25,890				(14,690		)	11,200
	Other income (expense), net		(888		)		(7		)	(895		)
	Interest expense, net		(4,592		)		(413		)	(5,005		)
	Income taxes		(10,670		)		7,144			(3,526		)
	Income from discontinued operations, net		$	9,740			$	(7,966	)	$	1,774
	(a) - Includes approximately $21.7 million of costs related to the ONE Gas separation.
			Three Months Ended
			31-Mar-13
			Natural Gas				Energy			Total
			Distribution				Services
			(Thousands of dollars)
	Revenues		$	635,931			$	470,195		$	1,106,126
	Cost of sales and fuel		384,257				469,521			853,778
	Net margin		251,674				674			252,348
	Operating costs		113,403				4,888			118,291
	Depreciation and amortization		34,867				71			34,938
	Operating income (loss)		103,404				(4,285		)	99,119
	Other income (expense), net		619				28			647
	Interest expense, net		(15,306		)		(645		)	(15,951		)
	Income taxes		(30,288		)		1,675			(28,613		)
	Income from discontinued operations, net		$	58,429			$	(3,227	)	$	55,202
	Prior to the ONE Gas separation, natural gas sales and transportation and storage services provided to our former natural gas distribution business by ONEOK Partners were $7.5 million and $13.8 million for the three months ended March 31, 2014 and 2013, respectively. Prior to February 1, 2014, these revenues and related costs were eliminated in consolidation. Beginning February 1, 2014, these revenues represent third-party transactions with ONE Gas and are not eliminated in consolidation, as such sales and services have continued subsequent to the separation and are expected to continue in future periods.
	Prior to the completion of the wind down process, natural gas and natural gas liquids sales and transportation and storage services provided to our energy services business by ONEOK Partners were $46.0 million and $68.8 million for the three months ended March 31, 2014 and 2013, respectively. While these transactions were eliminated previously in consolidation, they are reflected now as affiliate transactions and no longer eliminated in consolidation.
	Statement of Financial Position of Discontinued Operations - The following table presents the carrying value of assets and liabilities of our former natural gas distribution and energy services businesses included in assets and liabilities of discontinued operations in the Consolidated Balance Sheets for the period presented:
			31-Dec-13
			Natural Gas				Energy			Total
			Distribution				Services
			(Thousands of dollars)
	Assets
	Cash and cash equivalents		$	3,535			$	213		$	3,748
	Accounts receivable, net		368,214				87,315			455,529
	Gas and natural gas liquids in storage		166,128				62,663			228,791
	Other current assets		30,328				29,476			59,804
	Net property, plant and equipment		3,065,272				279			3,065,551
	Goodwill		157,953				—			157,953
	Other assets		402,161				385			402,546
	Total assets		$	4,193,591			$	180,331		$	4,373,922
	Liabilities
	Current maturities of long-term debt		$	6			$	—		$	6
Accounts payable		168,785				77,287			246,072
Other current liabilities		168,964				40,646			209,610
Long-term debt, excluding current maturities		1,318				—			1,318
Deferred income taxes		826,921				(35,221		)	791,700
Other deferred credits		184,214				70,998			255,212
Total liabilities		$	1,350,208			$	153,710		$	1,503,918
At March 31, 2014, the major classes of assets and liabilities in discontinued operations related to our energy services business. These amounts consisted of current assets, which included accounts receivable of $124.0 million and current tax assets of $15.8 million; noncurrent assets, which included deferred tax assets of $32.0 million; current liabilities, which included accounts payable of $112.8 million, capacity release obligations of $50.1 million and current tax liabilities of $26.3 million; and noncurrent liabilities, which included $61.4 million of noncurrent capacity release obligations.

FAIR_VALUE_MEASUREMENTS

FAIR VALUE MEASUREMENTS	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
FAIR VALUE MEASUREMENTS	'
	C.	FAIR VALUE MEASUREMENTS
	Determining Fair Value - We define fair value as the price that would be received from the sale of an asset or the transfer of a liability in an orderly transaction between market participants at the measurement date.  We use market and income approaches to determine the fair value of our assets and liabilities and consider the markets in which the transactions are executed.  We measure the fair value of groups of financial assets and liabilities consistent with how a market participant would price the net risk exposure at the measurement date.
	In the first quarter 2014, outstanding commodity derivative positions with third parties entered into by our energy services business on ONEOK Partners’ behalf were transferred to ONEOK Partners. In the future, ONEOK Partners expects to enter into commodity derivative financial contracts directly with unaffiliated third parties.
	While many of the contracts in ONEOK Partners’ portfolio are executed in liquid markets where price transparency exists, some contracts are executed in markets for which market prices may exist, but the market may be relatively inactive.  This results in limited price transparency that requires management’s judgment and assumptions to estimate fair values.  For certain transactions, ONEOK Partners utilizes modeling techniques using NYMEX-settled pricing data, historical correlations of NGL product prices to crude oil prices and implied forward LIBOR curves. Inputs into ONEOK Partners’ fair value estimates include commodity-exchange prices, over-the-counter quotes, historical correlations of pricing data and LIBOR and other liquid money-market instrument rates.  ONEOK Partners also utilizes internally developed basis curves that incorporate observable and unobservable market data.  ONEOK Partners validates its valuation inputs with third-party information and settlement prices from other sources, where available.
	In addition, as prescribed by the income approach, ONEOK Partners computes the fair value of its derivative portfolio by discounting the projected future cash flows from its derivative assets and liabilities to present value using interest-rate yields to calculate present-value discount factors derived from LIBOR, Eurodollar futures and interest-rate swaps.  ONEOK Partners also takes into consideration the potential impact on market prices of liquidating positions in an orderly manner over a reasonable period of time under current market conditions.  It considers current market data in evaluating counterparties’, as well as its own, nonperformance risk, net of collateral, by using specific and sector bond yields and monitoring the credit default swap markets.  Although ONEOK Partners uses its best estimates to determine the fair value of the derivative contracts it has executed, the ultimate market prices realized could differ from its estimates, and the differences could be material.
	The fair value of ONEOK Partners’ forward-starting interest-rate swaps is determined using financial models that incorporate the implied forward LIBOR yield curve for the same period as the future interest-rate swap settlements.
	Fair Value Hierarchy - At each balance sheet date, we and ONEOK Partners utilize a fair value hierarchy to classify fair value amounts recognized or disclosed in the financial statements based on the observability of inputs used to estimate such fair value. The levels of the hierarchy are described below:
	•	Level 1 - fair value measurements are based on unadjusted quoted prices in active markets, including NYMEX-settled prices and actively quoted prices for equity securities. These balances are comprised predominantly of exchange-traded derivative contracts for natural gas and crude oil. Also included in Level 1 are equity securities.
	•	Level 2 - fair value measurements are based on significant observable pricing inputs, such as NYMEX-settled prices for natural gas and crude oil, and financial models that utilize implied forward LIBOR yield curves for interest-rate swaps.
	•	Level 3 - fair value measurements are based on inputs that may include one or more unobservable inputs, including internally developed basis curves that incorporate observable and unobservable market data, NGL price curves from broker quotes, market volatilities derived from the most recent NYMEX close spot prices and forward LIBOR curves, and adjustments for the credit risk of ONEOK Partners’ counterparties.  ONEOK Partners corroborates the data on which its fair value estimates are based using its market knowledge of recent transactions, analysis of historical correlations and validation with independent broker quotes.  These balances categorized as Level 3 are comprised of derivatives for natural gas and NGLs.  ONEOK Partners does not believe that its Level 3 fair value estimates have a material impact on its results of operations, as the majority of its derivatives are accounted for as hedges for which ineffectiveness is not material.
	Recurring Fair Value Measurements - The following tables set forth our recurring fair value measurements for our continuing operations for the periods indicated:
		March 31, 2014
		Level 1			Level 2			Level 3			Total - Gross			Netting (a)			Total - Net (b)
		(Thousands of dollars)
	Assets
	Derivatives
	Commodity contracts
	Financial contracts	$	133		$	39		$	542		$	714		$	(573	)	$	141
	Physical contracts	—			—			3,332			3,332			(926		)	2,406
	Interest-rate contracts	—			38,384			—			38,384			—			38,384
	Total derivatives	133			38,423			3,874			42,430			(1,499		)	40,931
	Available-for-sale investment securities (c)	1,480			—			—			1,480			—			1,480
	Total assets	$	1,613		$	38,423		$	3,874		$	43,910		$	(1,499	)	$	42,411
	Liabilities
	Derivatives
	Commodity contracts
	Financial contracts	$	(3,099	)	$	(1,722	)	$	(401	)	$	(5,222	)	$	3,326		$	(1,896	)
	Physical contracts	—			—			(1,501		)	(1,501		)	926			(575		)
	Interest-rate contracts	—			(4,574		)	—			(4,574		)	—			(4,574		)
	Total liabilities	$	(3,099	)	$	(6,296	)	$	(1,902	)	$	(11,297	)	$	4,252		$	(7,045	)
	(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheets on a net basis.  ONEOK Partners nets derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and ONEOK Partners.  At March 31, 2014, ONEOK Partners held no cash collateral and posted $2.8 million cash collateral with various counterparties.
	(b) - Included in other current assets, other assets or other current liabilities in our Consolidated Balance Sheets.
	(c) - Available-for-sale investment securities represent assets of ONEOK.
		December 31, 2013
		Level 1			Level 2			Level 3			Total - Gross			Netting (a)			Total - Net (b)
		(Thousands of dollars)
	Assets
	Derivatives
	Commodity contracts
	Financial contracts	$	—		$	3,657		$	2,812		$	6,469		$	(1,746	)	$	4,723
	Physical contracts	—			—			2,023			2,023			(946		)	1,077
	Interest-rate contracts	—			54,503			—			54,503			—			54,503
	Total derivatives	—			58,160			4,835			62,995			(2,692		)	60,303
	Available-for-sale investment securities (c)	1,569			—			—			1,569			—			1,569
	Total assets	$	1,569		$	58,160		$	4,835		$	64,564		$	(2,692	)	$	61,872
	Liabilities
	Derivatives
	Commodity contracts
	Financial contracts	$	—		$	(2,953	)	$	(2,154	)	$	(5,107	)	$	1,746		$	(3,361	)
	Physical contracts	—			—			(3,463		)	(3,463		)	946			(2,517		)
	Total derivative liabilities	$	—		$	(2,953	)	$	(5,617	)	$	(8,570	)	$	2,692		$	(5,878	)
	(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheets on a net basis.  ONEOK Partners nets derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and ONEOK Partners. At December 31, 2013, we and ONEOK Partners had no cash collateral held or posted.
	(b) - Included in other current assets, other assets or other current liabilities in our Consolidated Balance Sheets.
	(c) - Available-for-sale investment securities represent assets of ONEOK.
	The following table sets forth the reconciliation of our Level 3 fair value measurements for our continuing operations for the periods indicated:
		Three Months Ended
		March 31,
	Derivative Assets (Liabilities)	2014			2013
		(Thousands of dollars)
	Net assets (liabilities) at beginning of period	$	(782	)	$	(2,423	)
	Total realized/unrealized gains (losses):
	Included in earnings (a)	(928		)	—
	Included in other comprehensive income (loss)	(52		)	(2,432		)
Purchases, issuances and settlements	3,734			—
Net assets (liabilities) at end of period	$	1,972		$	(4,855	)
(a) - Reported in commodity sales revenues and cost of sales and fuel in our Consolidated Statements of Income.
Realized/unrealized gains (losses) include the realization of ONEOK Partners’ derivative contracts through maturity. During the three months ended March 31, 2014 and 2013, gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the end of the period were not material.
ONEOK Partners recognizes transfers into and out of the levels in the fair value hierarchy as of the end of each reporting period.  During the three months ended March 31, 2014 and 2013, there were no transfers between levels.
Other Financial Instruments - The approximate fair value of cash and cash equivalents, accounts receivable, accounts payable and notes payable is equal to book value, due to the short-term nature of these items. Our cash and cash equivalents are comprised of bank and money market accounts and are classified as Level 1.  Our notes payable are classified as Level 2 since the estimated fair value of the notes payable can be determined using information available in the commercial paper market.
The estimated fair value of our consolidated long-term debt, including current maturities, was $7.8 billion, and $8.2 billion at March 31, 2014, and December 31, 2013, respectively.  The book value of long-term debt, including current maturities, was $7.2 billion and $7.8 billion at March 31, 2014, and December 31, 2013, respectively.  The estimated fair value of the aggregate of ONEOK’s and ONEOK Partners’ senior notes outstanding was determined using quoted market prices for similar issues with similar terms and maturities.  The estimated fair value of our consolidated long-term debt is classified as Level 2.

RISK_MANAGEMENT_AND_HEDGING_AC

RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES	'
	D.	RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES
	Risk-Management Activities - ONEOK Partners is sensitive to changes in natural gas, crude oil and NGL prices, principally as a result of contractual terms under which these commodities are processed, purchased and sold.  ONEOK Partners uses physical-forward sales and financial derivatives to secure a certain price for a portion of its natural gas, condensate and NGL products.  ONEOK Partners follows established policies and procedures to assess risk and approve, monitor and report its risk-management activities.  ONEOK Partners has not used these instruments for trading purposes.  We and ONEOK Partners are also subject to the risk of interest-rate fluctuation in the normal course of business.
	Commodity-price risk - ONEOK Partners is exposed to the risk of loss in cash flows and future earnings arising from adverse changes in the price of natural gas, NGLs and condensate.  ONEOK Partners uses the following commodity derivatives instruments to mitigate the commodity-price risk associated with a portion of the forecasted sales of these commodities:
	•	Futures contracts - Standardized contracts to purchase or sell natural gas and crude oil for future delivery or settlement under the provisions of exchange regulations;
	•	Forward contracts - Nonstandardized commitments between two parties to purchase or sell natural gas, crude oil or NGLs for future physical delivery. These contracts typically are nontransferable and only can be canceled with the consent of both parties; and
	•	Swaps - Exchange of one or more payments based on the value of one or more commodities. This instrument transfers the financial risk associated with a future change in value between the counterparties of the transaction without also conveying ownership interest in the asset or liability.
	ONEOK Partners’ Natural Gas Gathering and Processing segment is exposed to commodity-price risk as a result of receiving commodities in exchange for services associated with its POP contracts. ONEOK Partners is also exposed to basis risk between the various production and market locations where it receives and sells commodities.  As part of its hedging strategy, ONEOK Partners uses the previously described commodity derivative financial instruments and physical-forward contracts to minimize the impact of price fluctuations related to natural gas, NGLs and condensate.
	ONEOK Partners’ Natural Gas Liquids segment is exposed to basis risk primarily as a result of the relative value of NGL purchases at one location and sales at another location. To a lesser extent, ONEOK Partners is exposed to commodity-price risk resulting from the relative values of the various NGL products to each other, NGLs in storage and the relative value of NGLs to natural gas. ONEOK Partners utilizes physical-forward contracts to reduce the impact of price fluctuations related to NGLs. At March 31, 2014, and December 31, 2013, there were no financial derivative instruments used in ONEOK Partners’ natural gas liquids operations.
	ONEOK Partners’ Natural Gas Pipelines segment is exposed to commodity-price risk because its intrastate and interstate natural gas pipelines retain natural gas from its customers for operations or as part of its fee for services provided. When the amount of natural gas consumed in operations by these pipelines differs from the amount provided by its customers, ONEOK Partners’ pipelines must buy or sell natural gas, or store or use natural gas from inventory, which can expose it to commodity-price risk depending on the regulatory treatment for this activity. To the extent that commodity-price risk in its Natural Gas Pipelines segment is not mitigated by fuel cost-recovery mechanisms, ONEOK Partners uses physical-forward sales or purchases to reduce the impact of price fluctuations related to natural gas. At March 31, 2014, and December 31, 2013, there were no financial derivative instruments used in ONEOK Partners’ natural gas pipeline operations.
	Interest-rate risk - We and ONEOK Partners manage interest-rate risk through the use of fixed-rate debt, floating-rate debt and interest-rate swaps. Interest-rate swaps are agreements to exchange interest payments at some future point based on specified notional amounts.
	ONEOK Partners has forward-starting interest-rate swaps designated as cash flow hedges of the variability of interest payments on a portion of forecasted debt issuances that may result from changes in the benchmark interest rate before the debt is issued. At March 31, 2014, ONEOK Partners had forward-starting interest-rate swaps with notional amounts totaling $400 million with settlement dates greater than 12 months and $500 million with settlement dates less than 12 months.
	Accounting Treatment - We and ONEOK Partners record all derivative instruments at fair value, with the exception of normal purchases and normal sales that are expected to result in physical delivery.  The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and, if so, the reason for holding it.
	The table below summarizes the various ways in which we and ONEOK Partners account for derivative instruments and the impact on our consolidated financial statements:
			Recognition and Measurement
	Accounting Treatment		Balance Sheet		Income Statement
	Normal purchases and normal	-	Fair value not recorded	-	Change in fair value not recognized in earnings
	sales
	Mark-to-market	-	Recorded at fair value	-	Change in fair value recognized in earnings
	Cash flow hedge	-	Recorded at fair value	-	Ineffective portion of the gain or loss on the
					derivative instrument is recognized in earnings
		-	Effective portion of the gain or loss on the	-	Effective portion of the gain or loss on the
			derivative instrument is reported initially		derivative instrument is reclassified out of
			as a component of accumulated other		accumulated other comprehensive income (loss)
			comprehensive income (loss)		into earnings when the forecasted transaction
					affects earnings
	Fair value hedge	-	Recorded at fair value	-	The gain or loss on the derivative instrument is
					recognized in earnings
		-	Change in fair value of the hedged item is	-	Change in fair value of the hedged item is
			recorded as an adjustment to book value		recognized in earnings
	Under certain conditions, we and ONEOK Partners designate derivative instruments as a hedge of exposure to changes in fair values or cash flows. We and ONEOK Partners formally document all relationships between hedging instruments and hedged items, as well as risk-management objectives, strategies for undertaking various hedge transactions and methods for assessing and testing correlation and hedge ineffectiveness. We and ONEOK Partners specifically identify the forecasted transaction that has been designated as the hedged item. We and ONEOK Partners assess the effectiveness of hedging relationships quarterly by performing an effectiveness analysis on fair value and cash flow hedging relationships to determine whether the hedge relationships are highly effective on a retrospective and prospective basis.  ONEOK Partners also documents normal purchases and normal sales transactions expected to result in physical delivery and that are exempted from derivative accounting treatment.
	The presentation of settled derivative instruments on either a gross or net basis in our Consolidated Statements of Income is dependent on the relevant facts and circumstances of our different types of activities rather than based solely on the terms of the individual contracts.  All financially settled derivative instruments are reported on a net basis in revenues in our Consolidated Statements of Income.  The realized revenues and purchase costs of derivative instruments that are not considered held for trading purposes and nonderivative contracts are reported on a gross basis. Derivatives that qualify as normal purchases or normal sales that are expected to result in physical delivery are also reported on a gross basis.
	Cash flows from futures, forwards and swaps that are accounted for as hedges are included in the same category as the cash flows from the related hedged items in our Consolidated Statements of Cash Flows.
	Fair Values of Derivative Instruments - See Note C for a discussion of the inputs associated with our fair value measurements. The following table sets forth the fair values of derivative instruments for our continuing operations for the periods indicated:
		March 31, 2014								December 31, 2013
		Assets (a)				(Liabilities) (a)				Assets (a)			(Liabilities) (a)
		(Thousands of dollars)
	Derivatives designated as hedging instruments
	Commodity contracts
	Financial contracts	$	714			$	(5,222	)		$	6,469		$	(5,107	)
	Physical contracts	3,301				(1,501		)		1,064			(3,463		)
	Interest-rate contracts	38,384				(4,574		)		54,503			—
	Total derivatives designated as hedging instruments	42,399				(11,297		)		62,036			(8,570		)
	Derivatives not designated as hedging instruments
	Commodity contracts
	Physical contracts	31				—				959			—
	Total derivatives not designated as hedging instruments	31				—				959			—
	Total derivatives	$	42,430			$	(11,297	)		$	62,995		$	(8,570	)
	(a) - ONEOK Partners’ derivative assets and liabilities are included on a net basis in other current assets, other assets or other current liabilities on our Consolidated Balance Sheets.
	Notional Quantities for Derivative Instruments - The following table sets forth the notional quantities for derivative instruments for our continuing operations for the periods indicated:
			March 31, 2014								December 31, 2013
		Contract	Purchased/				Sold/				Purchased/			Sold/
		Type	Payor				Receiver				Payor			Receiver
	Derivatives designated as hedging instruments:
	Cash flow hedges
	Fixed price
	- Natural gas (Bcf)	Futures and swaps	—				(41.6		)		—			(48.1		)
	- Crude oil and NGLs (MMbbl)	Futures, forwards	—				(3.7		)		—			(4.0		)
		and swaps
	Basis
	- Natural gas (Bcf)	Futures and swaps	—				(41.6		)		—			(48.1		)
	Interest-rate contracts (Millions of dollars)	Forward-starting	$	900			$	—			$	400		$	—
		swaps
	These notional quantities are used to summarize the volume of financial instruments; however, they do not reflect the extent to which the positions offset one another and consequently do not reflect ONEOK Partners’ actual exposure to market or credit risk.
Cash Flow Hedges - Accumulated other comprehensive income (loss) at March 31, 2014, includes losses of approximately $2.7 million, net of tax, related to these hedges that will be recognized within the next 21 months as the forecasted transactions affect earnings.  If prices remain at current levels, we will recognize $3.6 million in net losses over the next 12 months and net gains of $0.9 million thereafter.  The amount deferred in accumulated other comprehensive income (loss) attributable to our settled interest-rate swaps is a loss of $42.6 million, net of tax, which will be recognized over the life of the long-term, fixed-rate debt. We expect that losses of $4.8 million, will be reclassified into earnings during the next 12 months as the hedged items affect earnings. The remaining amounts in accumulated other comprehensive income (loss) are attributable primarily to ONEOK Partners’ forward-starting interest-rate swaps with future settlement dates, which will be amortized to interest expense over the life of long-term, fixed-rate debt upon issuance of ONEOK Partners’ debt.
The following table sets forth the effects of cash flow hedges recognized in other comprehensive income (loss) for our continuing operations for the periods indicated:
Derivatives in Cash Flow	Three Months Ended
Hedging Relationships	March 31,
	2014				2013
	(Thousands of dollars)
Commodity contracts	$	(35,762	)		$	(19,768	)
Interest-rate contracts	(20,693		)		6,788
Total unrealized gain (loss) recognized in other comprehensive income (loss) on derivatives	$	(56,455	)		$	(12,980	)
(effective portion)
The following table sets forth the effect of cash flow hedges on our Consolidated Statements of Income for our continuing operations for the periods indicated:
Derivatives in Cash Flow	Location of Gain (Loss) Reclassified from	Three Months Ended
Hedging Relationships	Accumulated Other Comprehensive Income	March 31,
	(Loss) into Net Income (Effective Portion)	2014				2013
		(Thousands of dollars)
Commodity contracts	Commodity sales revenues	$	(26,419	)		$	2,566
Interest-rate contracts	Interest expense	(11,321		)		(3,437		)
Total gain (loss) reclassified from accumulated other comprehensive income (loss) into net income		$	(37,740	)		$	(871	)
on derivatives (effective portion)
Ineffectiveness related to our and ONEOK Partners’ cash flow hedges was not material for the three months ended March 31, 2014 and 2013.  In the event that it becomes probable that a forecasted transaction will not occur, ONEOK Partners will discontinue cash flow hedge treatment, which will affect earnings.
For the three months ended March 31, 2014, we reclassified losses of $4.6 million, net of taxes of $3.1 million, to interest expense from accumulated other comprehensive income (loss) due to the discontinuance of cash flow hedge treatment from the de-designation of interest-rate swaps related to the early retirement of long-term debt. See Note F for additional information. There were no gain or losses due to the discontinuance of cash flow hedge treatment during the three months ended March 31, 2013.
Credit Risk - In the first quarter 2014, outstanding commodity derivative positions with third parties entered into by our energy services business on ONEOK Partners’ behalf were transferred to ONEOK Partners. In the future, ONEOK Partners expects to enter into commodity derivative financial contracts directly with unaffiliated third parties.
We and ONEOK Partners monitor the creditworthiness of our counterparties and compliance with policies and limits established by our Risk Oversight and Strategy Committee. We and ONEOK Partners maintain credit policies on our counterparties that we and ONEOK Partners believe minimize overall credit risk.  These policies include an evaluation of potential counterparties’ financial condition (including credit ratings, bond yields and credit default swap rates), collateral requirements under certain circumstances and the use of standardized master-netting agreements that allow us to net the positive and negative exposures associated with a single counterparty.  ONEOK Partners has counterparties whose credit is not rated, and for those customers it uses internally developed credit ratings.
Some of ONEOK Partners’ derivative instruments contain provisions that require it to maintain an investment-grade credit rating from S&P and/or Moody’s.  If ONEOK Partners’ credit ratings on senior unsecured long-term debt were to decline below investment grade, the counterparties to the derivative instruments could request collateralization on derivative instruments in net liability positions. There were no financial derivative instruments with contingent features related to credit risk in a net liability position at March 31, 2014.
The counterparties to ONEOK Partners’ derivative contracts consist primarily of major energy companies, financial institutions and commercial and industrial end-users.  This concentration of counterparties may affect ONEOK Partners’ overall exposure to credit risk, either positively or negatively, in that the counterparties may be affected similarly by changes in economic, regulatory or other conditions.  Based on ONEOK Partners’ policies, exposures, credit and other reserves, it does not anticipate a material adverse effect on its financial position or results of operations as a result of counterparty nonperformance.

CREDIT_FACILITIES_AND_SHORTTER

CREDIT FACILITIES AND SHORT-TERM NOTES PAYABLE	3 Months Ended
	Mar. 31, 2014
Short-term Debt [Abstract]	'
CREDIT FACILITIES AND SHORT-TERM NOTES PAYABLE	'
	E.	CREDIT FACILITIES AND SHORT-TERM NOTES PAYABLE
	ONEOK Credit Agreement - The ONEOK Credit Agreement, which was amended and restated effective on January 31, 2014, and expires in January 2019, is a $300 million revolving credit facility and contains certain financial, operational and legal covenants. Among other things, these covenants include maintaining a ratio of indebtedness to Consolidated EBITDA (EBITDA, as defined in our ONEOK Credit Agreement) of no more than 4.0 to 1. Upon breach of certain covenants by us in the ONEOK Credit Agreement, amounts outstanding under the ONEOK Credit Agreement, if any, may become due and payable immediately. At March 31, 2014, ONEOK’s ratio of indebtedness to Consolidated EBITDA, was 1.5 to 1, and ONEOK was in compliance with all covenants under the ONEOK Credit Agreement. As a result of a reduction in the borrowing capacity of the ONEOK Credit Agreement, we wrote off approximately $2.9 million in interest expense of previously deferred credit agreement issuance costs.
	The ONEOK Credit Agreement also includes a $50 million sublimit for the issuance of standby letters of credit and a $50 million sublimit for swingline loans. ONEOK may request an increase in the size of the facility to an aggregate of $500 million from $300 million by either commitments from new lenders or increased commitments from existing lenders. The ONEOK Credit Agreement contains provisions for an applicable margin rate and an annual facility fee, both of which adjust with changes in our credit rating. Based on our current credit rating, borrowings, if any, will accrue at LIBOR plus 125 basis points, and the annual facility fee is 25 basis points.
	In February 2014, we repaid all amounts outstanding under our commercial paper program with a portion of the proceeds received from ONE Gas in connection with the separation and terminated the program. See Note F for additional information. At March 31, 2014, ONEOK had $2.2 million in letters of credit issued, leaving approximately $297.8 million of credit available under the ONEOK Credit Agreement.
	ONEOK Partners Credit Agreement - The amount of short-term borrowings authorized by ONEOK Partners’ general partner’s Board of Directors is $2.5 billion. At March 31, 2014, ONEOK Partners had $125.0 million in commercial paper outstanding, $14.0 million in letters of credit issued and no borrowings under the ONEOK Partners Credit Agreement.
	The ONEOK Partners Credit Agreement, which was amended and restated effective on January 31, 2014, and expires in January 2019, is a $1.7 billion revolving credit facility and includes a $100 million sublimit for the issuance of standby letters of credit, a $150 million swingline sublimit and an option to request an increase in the size of the facility to an aggregate of $2.4 billion by either commitments from new lenders or increased commitments from existing lenders. The ONEOK Partners Credit Agreement is available for general partnership purposes. Amounts outstanding under ONEOK Partners’ commercial paper program reduce the borrowing capacity under the ONEOK Partners Credit Agreement.
	The ONEOK Partners Credit Agreement contains provisions for an applicable margin rate and an annual facility fee, both of which adjust with changes in its credit rating. Under the terms of the ONEOK Partners Credit Agreement, based on ONEOK Partners’ current credit ratings, borrowings, if any, will accrue at LIBOR plus 117.5 basis points, and the annual facility fee is 20 basis points. The ONEOK Partners Credit Agreement is guaranteed fully and unconditionally by the Intermediate Partnership.
	The ONEOK Partners Credit Agreement contains certain financial, operational and legal covenants. Among other things, these covenants include maintaining a ratio of indebtedness to adjusted EBITDA (EBITDA, as defined in the ONEOK Partners Credit Agreement, adjusted for all noncash charges and increased for projected EBITDA from certain lender-approved capital expansion projects) of no more than 5.0 to 1.  If ONEOK Partners consummates one or more acquisitions in which the aggregate purchase price is $25 million or more, the allowable ratio of indebtedness to adjusted EBITDA will increase to 5.5 to 1 for the quarter in which the acquisition was completed and the two following quarters.  As a result of a pipeline acquisition ONEOK Partners completed in the first quarter 2014, the allowable ratio of indebtedness to adjusted EBITDA increased to 5.5 to 1 through the third quarter 2014. Upon breach of certain covenants by ONEOK Partners in the ONEOK Partners Credit Agreement, amounts outstanding under the ONEOK Partners Credit Agreement, if any, may become due and payable immediately.  At March 31, 2014, its ratio of indebtedness to adjusted EBITDA was 3.7 to 1, and ONEOK Partners was in compliance with all covenants under the ONEOK Partners Credit Agreement.
	Neither ONEOK nor ONEOK Partners guarantees the debt or other similar commitments of unaffiliated parties. ONEOK does not guarantee the debt, commercial paper or other similar commitments of ONEOK Partners, and ONEOK Partners does not guarantee the debt, commercial paper or other similar commitments of ONEOK.

LONGTERM_DEBT

LONG-TERM DEBT	3 Months Ended
	Mar. 31, 2014
Long-term Debt, Unclassified [Abstract]	'
LONG-TERM DEBT	'
	F.	LONG-TERM DEBT
	In January 2014, ONE Gas, which at the time was our wholly owned subsidiary, completed a private placement of three series of Senior Notes totaling $1.2 billion. The following table details information about each of the three series of Senior Notes:
			(In millions)
	2.07% notes due February 1, 2019		$	300
	3.61% notes due February 1, 2024		300
	4.658% notes due February 1, 2044		600
	Total		$	1,200
	Our obligations related to the ONE Gas Senior Notes terminated when we completed the separation of ONE Gas on January 31, 2014.
	ONE Gas made a cash payment to us of approximately $1.13 billion from the proceeds of this offering. In February 2014, we retired approximately $152.5 million of the 4.25 percent senior notes due 2022 through a tender offer. The total amount paid was approximately $150 million. In February 2014, we called our $400 million, 5.2 percent senior notes due in 2015. The full repayment occurred in March 2014 and totaled $430.1 million, including accrued but unpaid interest to the redemption date. We recorded a loss on extinguishment of $24.8 million related to the debt retirements, which is included in other expense in our Consolidated Statements of Income.

EQUITY

EQUITY	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Stockholders' Equity Note Disclosure [Text Block]	'
	G.	EQUITY
	The following table sets forth the changes in equity attributable to us and our noncontrolling interests, including other comprehensive income, net of tax, for the periods indicated:
		Three Months Ended										Three Months Ended
		31-Mar-14										31-Mar-13
		ONEOK				Noncontrolling			Total			ONEOK			Noncontrolling			Total
		Shareholders’				Interests in			Equity			Shareholders’			Interests in			Equity
		Equity				Consolidated						Equity			Consolidated
						Subsidiaries									Subsidiaries
		(Thousands of dollars)
	Beginning balance	$	2,337,851			$	2,507,329		$	4,845,180		$	2,129,609		$	2,102,841		$	4,232,450
	Net income	93,515				112,996			206,511			112,521			53,184			165,705
	Other comprehensive income	8,685				(17,309		)	(8,624		)	(6,355		)	(7,526		)	(13,881		)
	(loss)
	Common stock issued	7,579				—			7,579			2,831			—			2,831
	Common stock dividends	(83,275		)		—			(83,275		)	(73,781		)	—			(73,781		)
	Issuance of common units of	10,996				41,846			52,842			2,956			11,616			14,572
	ONEOK Partners
	Distribution of ONE Gas to shareholders	(1,747,424		)	(a)	—			(1,747,424		)	—			—			—
	Distributions to noncontrolling	—				(101,655		)	(101,655		)	—			(90,336		)	(90,336		)
	interests
	Other	(43,427		)		—			(43,427		)	(33,427		)	—			(33,427		)
	Ending balance	$	584,500			$	2,543,207		$	3,127,707		$	2,134,354		$	2,069,779		$	4,204,133
	(a) - Includes certain estimates expected to be finalized in the second quarter 2014.
	Dividends - Dividends paid on our common stock to shareholders of record at the close of business on February 10, 2014, were $0.40 per share.  A dividend of $0.56 per share was declared for shareholders of record on April 30, 2014, payable May 15, 2014.
	See Note L for a discussion of ONEOK Partners’ issuance of common units and distributions to noncontrolling interests.

ACCUMULATED_OTHER_COMPREHENSIV

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	'
	H.	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
	The following table sets forth the balance in accumulated other comprehensive income (loss) for the period indicated:
		Unrealized Gains				Unrealized				Pension and			Accumulated
		(Losses) on Energy				Holding Gains				Postretirement			Other
		Marketing and				(Losses)				Benefit Plan			Comprehensive
		Risk-Management				on Investment				Obligations (a)			Income (Loss) (a)
		Assets/Liabilities (a)				Securities (a)
		(Thousands of dollars)
	1-Jan-14	$	(43,168	)		$	857			$	(79,676	)	$	(121,987	)
	Other comprehensive income (loss) before	(15,508		)		(76		)		45			(15,539		)
	reclassifications
	Amounts reclassified from accumulated other	20,418				—				3,806			24,224
	comprehensive income (loss)
	Other comprehensive income	4,910				(76		)		3,851			8,685
	(loss) attributable to ONEOK
	Transfer to ONE Gas	—				—				3,389			3,389
	March 31, 2014	$	(38,258	)		$	781			$	(72,436	)	$	(109,913	)
	(a) All amounts are presented net of tax.
	The following table sets forth the effect of reclassifications from accumulated other comprehensive income (loss) on our Consolidated Statements of Income for the periods indicated:
	Affected Line Item in the		Three Months Ended March 31,								Affected Line Item in the Consolidated
	Consolidated Statements of Income		2014				2013				Statements of Income
			(Thousands of dollars)
	Unrealized (gains) losses on energy marketing
	and risk-management assets/liabilities
	Commodity contracts		$	26,419			$	(2,566	)		Commodity sales revenues
	Interest-rate contracts		11,321				3,437				Interest expense
			37,740				871				Income before income taxes
			(7,896		)		(394		)		Income tax expense
			29,844				477				Income from continuing operations
	Discontinued operations, net of tax		7,683				6,818				Income from discontinued operations
			37,527				7,295				Net income
	Noncontrolling interest		17,109				(148		)		Less: Net income attributable to
											noncontrolling interest
			$	20,418			$	7,443			Net income attributable to ONEOK
	Pension and postretirement benefit plan
	obligations (a)
	Amortization of net loss		$	3,963			$	5,078
	Amortization of unrecognized prior service cost		(367		)		(113		)
	Amortization of unrecognized net asset at		—				7
	adoption
			3,596				4,972				Income before income taxes
			(1,438		)		(1,923		)		Income tax expense
			2,158				3,049				Income from continuing operations
	Discontinued operations, net of tax		1,648				8,209				Income from discontinued operations
			$	3,806			$	11,258			Net income attributable to ONEOK
	Total reclassifications for the period		$	24,224			$	18,701			Net income attributable to ONEOK
	attributable to ONEOK
	(a) These components of accumulated other comprehensive income (loss) are included in the computation of net periodic benefit cost. See Note J for additional detail of our net periodic benefit cost.

EARNINGS_PER_SHARE

EARNINGS PER SHARE	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
EARNINGS PER SHARE	'
	I.	EARNINGS PER SHARE
	The following tables set forth the computation of basic and diluted EPS from continuing operations for the periods indicated:
		Three Months Ended March 31, 2014
		Income		Shares	Per Share
					Amount
		(Thousands, except per share amounts)
	Basic EPS from continuing operations
	Income from continuing operations attributable to ONEOK available for common	$	91,741	209,130	$	0.44
	stock
	Diluted EPS from continuing operations
	Effect of dilutive securities	—		1,036
	Income from continuing operations attributable to ONEOK available for common	$	91,741	210,166	$	0.44
	stock and common stock equivalents
		Three Months Ended March 31, 2013
		Income		Shares	Per Share
					Amount
		(Thousands, except per share amounts)
	Basic EPS from continuing operations
	Income from continuing operations attributable to ONEOK available for common	$	57,319	205,479	$	0.28
	stock
	Diluted EPS from continuing operations
	Effect of dilutive securities	—		3,979
	Income from continuing operations attributable to ONEOK available for common	$	57,319	209,458	$	0.27
	stock and common stock equivalents

EMPLOYEE_BENEFIT_PLANS

EMPLOYEE BENEFIT PLANS	3 Months Ended
	Mar. 31, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
EMPLOYEE BENEFIT PLANS	'
	J.	EMPLOYEE BENEFIT PLANS
	The following tables set forth the components of net periodic benefit cost for our pension and postretirement benefit plans for our continuing operations for the periods indicated:
		Pension Benefits
		Three Months Ended
		March 31,
		2014			2013
		(Thousands of dollars)
	Components of net periodic benefit cost
	Service cost	$	1,822		$	1,532
	Interest cost	4,628			3,906
	Expected return on assets	(4,935		)	(4,969		)
	Amortization of unrecognized prior service cost	48			58
	Amortization of net loss	3,755			4,755
	Net periodic benefit cost	$	5,318		$	5,282
		Postretirement Benefits
		Three Months Ended
		March 31,
		2014			2013
		(Thousands of dollars)
	Components of net periodic benefit cost
	Service cost	$	179		$	118
	Interest cost	611			298
	Expected return on assets	(555		)	(314		)
	Amortization of unrecognized net asset at adoption	—			7
	Amortization of unrecognized prior service cost	(415		)	(171		)
	Amortization of net loss	208			323
	Net periodic benefit cost	$	28		$	261

UNCONSOLIDATED_AFFILIATES

UNCONSOLIDATED AFFILIATES	3 Months Ended
	Mar. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
UNCONSOLIDATED AFFILIATES	'
	K.	UNCONSOLIDATED AFFILIATES
	Equity Earnings from Investments - The following table sets forth ONEOK Partners’ equity earnings (losses) from investments for the periods indicated:
		Three Months Ended
		March 31,
		2014			2013
		(Thousands of dollars)
	Northern Border Pipeline	$	23,409		$	16,390
	Overland Pass Pipeline Company	4,731			2,899
	Fort Union Gas Gathering	4,129			3,869
	Bighorn Gas Gathering	(400		)	712
	Other	1,790			1,985
	Equity earnings from investments	$	33,659		$	25,855
	Unconsolidated Affiliates Financial Information - The following table sets forth summarized combined financial information of ONEOK Partners’ unconsolidated affiliates for the periods indicated:
		Three Months Ended
		March 31,
		2014			2013
		(Thousands of dollars)
	Income Statement
	Operating revenues	$	155,279		$	127,801
	Operating expenses	$	71,679		$	64,271
	Net income	$	78,673		$	58,204
	Distributions paid to ONEOK Partners	$	35,070		$	30,193
	ONEOK Partners incurred expenses in transactions with unconsolidated affiliates of $14.2 million and $7.8 million for the three months ended March 31, 2014 and 2013, respectively, primarily related to Overland Pass Pipeline Company, which are included in cost of sales and fuel in our Consolidated Statements of Income. Accounts payable to ONEOK Partners’ equity method investees at March 31, 2014, and December 31, 2013, were not material.
	Low natural gas prices and the relatively higher crude oil and NGL prices, compared with natural gas on a heating-value basis, have caused producers primarily to focus development efforts on crude oil and NGL-rich supply basins rather than areas with dry natural gas production, such as the coal-bed methane areas in the Powder River Basin.  The reduced coal-bed methane development activities and natural production declines in the dry natural gas formations of the Powder River Basin have resulted in lower natural gas volumes available to be gathered.  While the reserve potential in the dry natural gas formations of the Powder River Basin still exists, future drilling and development will be affected by commodity prices and producers’ alternative prospects.
	Due to recent reductions in producer activity and declines in natural gas volumes gathered in the dry natural gas area of the Powder River Basin on the Bighorn Gas Gathering system in which ONEOK Partners owns a 49 percent interest, ONEOK Partners tested its investment for impairment at December 31, 2013. The estimated fair value exceeded the carrying value; however, a decline of 10 percent or more in the fair value of ONEOK Partners’ investment in Bighorn Gas Gathering would result in a noncash impairment charge. ONEOK Partners is not able to reasonably estimate a range of potential future impairment charges, as many of the assumptions that would be used in its estimate of fair value are dependent upon events beyond its control. The carrying amount of ONEOK Partners’ investment at March 31, 2014 was $86.6 million, which includes $53.4 million in equity method goodwill.

ONEOK_PARTNERS

ONEOK PARTNERS	3 Months Ended
	Mar. 31, 2014
Related Party Transactions [Abstract]	'
ONEOK PARTNERS	'
	L.	ONEOK PARTNERS
	Equity Issuances - ONEOK Partners has an “at-the-market” equity program for the offer and sale from time to time of its common units up to an aggregate amount of $300 million. The program allows ONEOK Partners to offer and sell its common units at prices ONEOK Partners deems appropriate through a sales agent. Sales of common units are made by means of ordinary brokers’ transactions on the NYSE, in block transactions, or as otherwise agreed to between ONEOK Partners and the sales agent. ONEOK Partners is under no obligation to offer and sell common units under the program. At March 31, 2014, ONEOK Partners had $207.3 million available for issuance under the program.
	During the three months ended March 31, 2014, ONEOK Partners sold approximately 1.1 million common units through this program. The net proceeds, including ONEOK Partners GP’s contribution to maintain our 2 percent general partner interest in ONEOK Partners, were approximately $56.5 million which were used for general partnership purposes. During the three months ended March 31, 2013, ONEOK Partners sold 300,000 common units through this program that resulted in net proceeds, including ONEOK Partners GP’s contribution to maintain our 2 percent general partner interest in ONEOK Partners of approximately $16.5 million, and used the proceeds for general partnership purposes.
	As a result of these transactions, our aggregate ownership interest in ONEOK Partners decreased to 41.0 percent at March 31, 2014, from 41.2 percent at December 31, 2013.
	We account for the difference between the carrying amount of our investment in ONEOK Partners and the underlying book value arising from issuance of common units by ONEOK Partners as an equity transaction.  If ONEOK Partners issues common units at a price different than our carrying value per unit, we account for the premium or deficiency as an adjustment to paid-in capital. As a result of ONEOK Partners’ issuance of common units, we recognized an increase to paid-in capital of approximately $11.0 million, net of taxes, for the three months ended March 31, 2014.
	Ownership Interest in ONEOK Partners - Our ownership interest in ONEOK Partners is shown in the table below at March 31, 2014:
	General partner interest	2	%
	Limited partner interest (a)	39	%
	Total ownership interest	41	%
	(a) - Represents 19.8 million common units and approximately 73.0 million Class B units, which are convertible, at our option, into common units.
	Cash Distributions - We receive distributions from ONEOK Partners on the common and Class B units we own and the 2 percent general partner interest, which includes our incentive distribution rights.  Under the Partnership Agreement, distributions are made to the partners with respect to each calendar quarter in an amount equal to 100 percent of available cash as defined in the Partnership Agreement.  Available cash generally will be distributed 98 percent to limited partners and 2 percent to the general partner.  The general partner’s percentage interest in quarterly distributions is increased after certain specified target levels are met during the quarter.  Under the incentive distribution provisions, as set forth in the Partnership Agreement, the general partner receives:
	•	15 percent of amounts distributed in excess of $0.3025 per unit;
	•	25 percent of amounts distributed in excess of $0.3575 per unit; and
	•	50 percent of amounts distributed in excess of $0.4675 per unit.
	In April 2014, a cash distribution of $0.745 per unit ($2.98 per unit on an annualized basis), an increase of 1.5 cents from the previous quarter, was declared for the first quarter 2014 and will be paid on May 15, 2014, to unitholders of record at the close of business on April 30, 2014.
	The following table shows ONEOK Partners’ distributions paid in the periods indicated:
		Three Months Ended
		March 31,
		2014		2013
		(Thousands, except per unit amounts)
	Distribution per unit	$	0.73	$	0.71
	General partner distributions	$	4,849	$	4,418
	Incentive distributions	68,255		60,437
	Distributions to general partner	73,104		64,855
	Limited partner distributions to ONEOK	67,737		65,880
	Limited partner distributions to noncontrolling interest	101,655		90,189
	Total distributions paid	$	242,496	$	220,924
	The following table shows ONEOK Partners’ distributions declared for the periods indicated and paid within 45 days of the end of the period:
		Three Months Ended
		March 31,
		2014		2013
		(Thousands, except per unit amounts)
	Distribution per unit	$	0.745	$	0.715
	General partner distributions	$	5,011	$	4,469
	Incentive distributions	71,911		61,576
	Distributions to general partner	76,922		66,045
	Limited partner distributions to ONEOK	69,127		66,344
	Limited partner distributions to noncontrolling interest	104,506		91,039
	Total distributions declared	$	250,555	$	223,428
	Relationship - We consolidate ONEOK Partners in our consolidated financial statements; however, we are restricted from the assets and cash flows of ONEOK Partners except for the distributions we receive.  Distributions are declared quarterly by ONEOK Partners’ general partner based on the terms of the Partnership Agreement.  See Note N for more information on ONEOK Partners’ results.
	Affiliate Transactions - We have certain transactions with ONEOK Partners and its subsidiaries.
	Prior to the wind down of our energy services business, ONEOK Partners sold natural gas from its natural gas gathering and processing operations to our energy services business.  In addition, a portion of ONEOK Partners’ revenues from its natural gas pipelines business were from our energy services and former natural gas distribution businesses, which contracted with ONEOK Partners for natural gas transportation and storage services. ONEOK Partners also purchased natural gas from our energy services business for its natural gas liquids and its natural gas gathering and processing operations.
	As a result of the wind down discussed in Note B, our energy services business no longer executes affiliate transactions with ONEOK Partners. ONEOK Partners expects to enter into commodity derivative financial contracts with unaffiliated third parties. ONEOK Partners continues to provide natural gas transportation and storage services to ONE Gas after the separation.
	We provide a variety of services to our affiliates, including cash management and financial services, legal and administrative services by our employees and management, insurance and office space leased in our headquarters building and other field locations.  Where costs are incurred specifically on behalf of an affiliate, the costs are billed directly to the affiliate by us.  In other situations, the costs may be allocated to the affiliates through a variety of methods, depending upon the nature of the expenses and the activities of the affiliates.  For example, a service that applies equally to all employees is allocated based upon the number of employees in each affiliate.  However, an expense benefiting the consolidated company but having no direct basis for allocation is allocated by the modified Distrigas method, a method using a combination of ratios that include gross plant and investment, operating income and payroll expense.  For the three months ended March 31, 2014 and 2013, it is not practicable to determine what these general overhead costs would be on a stand-alone basis. As a result of the separation of the natural gas distribution business and the wind down of the energy services business, general overhead costs will be allocated primarily to ONEOK Partners beginning in the second quarter 2014.
	The following table shows ONEOK Partners’ transactions with us for the periods indicated:
		Three Months Ended
		March 31,
		2014		2013
		(Thousands of dollars)
	Revenues	$	53,526	$	82,634
	Expenses
	Cost of sales and fuel	$	10,835	$	9,551
	Administrative and general expenses	77,246		72,496
	Total expenses	$	88,081	$	82,047
	Prior to the ONE Gas separation, natural gas sales and transportation and storage services provided to our former natural gas distribution business by ONEOK Partners were $7.5 million and $13.8 million, respectively, for the three months ended March 31, 2014 and 2013. Prior to February 1, 2014, these revenues and related costs were eliminated in consolidation. Beginning February 1, 2014, these revenues represent third-party transactions with ONE Gas and are not eliminated in consolidation, as such sales and services have continued subsequent to the separation and are expected to continue in future periods. Prior to the completion of the energy services wind down, natural gas and natural gas liquids sales and transportation and storage services provided to our energy services business by ONEOK Partners were $46.0 million and $68.8 million, respectively, for the three months ended March 31, 2014 and 2013. While these transactions were eliminated in consolidation in previous periods, they are now reflected as affiliate transactions and not eliminated in consolidation as these transactions are expected to continue with third parties in future periods.

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	M.	COMMITMENTS AND CONTINGENCIES
	Environmental Matters - ONEOK Partners is subject to multiple historical preservation, wildlife preservation and environmental laws and/or regulations that affect many aspects of its present and future operations.  Regulated activities include, but are not limited to, those involving air emissions, storm water and wastewater discharges, handling and disposal of solid and hazardous wastes, wetland preservation, hazardous materials transportation and pipeline and facility construction. These laws and regulations require ONEOK Partners to obtain and/or comply with a wide variety of environmental clearances, registrations, licenses, permits and other approvals.  Failure to comply with these laws, regulations, licenses and permits may expose ONEOK Partners to fines, penalties and/or interruptions in its operations that could be material to its results of operations. For example, if a leak or spill of hazardous substances or petroleum products occurs from pipelines or facilities that ONEOK Partners owns, operates or otherwise uses, ONEOK Partners could be held jointly and severally liable for all resulting liabilities, including response, investigation and cleanup costs, which could affect materially its results of operations and cash flows.  In addition, emissions controls and/or other regulatory or permitting mandates under the Clean Air Act and other similar federal and state laws could require unexpected capital expenditures at its facilities.  ONEOK Partners cannot assure that existing environmental statutes and regulations will not be revised or that new regulations will not be adopted or become applicable to it.
	In June 2013, the Executive Office of the President of the United States (the President) issued the President’s Climate Action Plan, which includes, among other things, plans for further regulatory actions to reduce carbon emissions from various sources. On March 28, 2014, the President released the Climate Action Plan - Strategy to Reduce Methane Emissions (Methane Strategy) that lists a number of actions that the federal agencies will undertake to continue to reduce above-ground methane emissions from several industries, including the oil and natural gas sectors. The proposed measures outlined in the Methane Strategy include, without limitation, the following: collaboration with the states to encourage emission reductions; standards to minimize natural gas venting and flaring on public lands; policy recommendations for reducing emissions from energy infrastructure to increase the performance of the nation’s energy transmission, storage and distribution systems; and continued efforts by PHMSA to require pipeline operators to take steps to eliminate leaks and prevent accidental methane releases and evaluate the progress of states in replacing cast iron pipelines. The impact of any such proposed regulatory actions on ONEOK Partners’ facilities and operations is unknown. ONEOK Partners continues to monitor these proposed regulations and the impact they may have on its business. Revised or additional statutes or regulations that result in increased compliance costs or additional operating restrictions could have a significant impact on its business, financial position, results of operations and cash flows.
	The legal responsibility for the environmental conditions at former manufactured natural gas sites in Kansas was transferred from us to ONE Gas on January 31, 2014 upon the completion of the separation. Our expenditures for environmental assessment, mitigation, remediation and compliance prior to the separation were not significant in relation to our financial position, results of operations or cash flows, and our expenditures related to environmental matters have had no material effects on earnings or cash flows during the three months ended March 31, 2014 and 2013.
	The EPA’s “Tailoring Rule” regulates greenhouse gas emissions at new or modified facilities that meet certain criteria. Affected facilities are required to review best available control technology, conduct air-quality and impact analysis and public reviews with respect to such emissions.  At current emissions threshold levels, this rule has had a minimal impact on ONEOK Partners’ existing facilities.  The EPA has stated it will consider lowering the threshold levels over the next five years, which could increase the impact on its existing facilities; however, potential costs, fees or expenses associated with the potential adjustments are unknown.
	The EPA’s rule on air-quality standards, National Emission Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines (RICE NESHAP), initially included a compliance date in 2013, and has since become effective. While the rule could require capital expenditures for the purchase and installation of new emissions-control equipment, ONEOK Partners does not expect these expenditures will have a material impact on its results of operations, financial position or cash flows.
	In July 2011, the EPA issued a proposed rule that would change the air emissions New Source Performance Standards, also known as NSPS, and Maximum Achievable Control Technology requirements applicable to the oil and natural gas industry, including natural gas production, processing, transmission and underground storage sectors. In April 2012, the EPA released the final rule, which includes new NSPS and air toxic standards for a variety of sources within natural gas processing plants, oil and natural gas production facilities and natural gas transmission stations. The rule also regulates emissions from the hydraulic fracturing of wells for the first time. The EPA’s final rule reflects significant changes from the proposal issued in 2011 and allows for more manageable compliance options. The NSPS final rule became effective in October 2012, but the dates for compliance vary and depend in part upon the type of affected facility and the date of construction, reconstruction or modification.
	The rule was most recently amended in September 2013, and the EPA has indicated that further amendments may be issued in 2014. Based on the amendments and ONEOK Partners’ understanding of pending stakeholder responses to the NSPS rule, ONEOK Partners does not anticipate a material impact to its anticipated capital, operations and maintenance costs resulting from compliance with the regulation. However, the EPA may issue additional responses, amendments and/or policy guidance on the final rule, which could alter its present expectations. Generally, the NSPS rule will require expenditures for updated emissions controls, monitoring and record-keeping requirements at affected facilities in the crude oil and natural gas industry. ONEOK Partners does not expect these expenditures will have a material impact on its results of operations, financial position or cash flows.
	Pipeline Safety - ONEOK Partners is subject to PHMSA regulations, including asset integrity-management regulations.  The Pipeline Safety Improvement Act of 2002 requires pipeline companies operating high-pressure pipelines to perform integrity assessments on pipeline segments that pass through densely populated areas or near specifically designated high-consequence areas. In January 2012, The Pipeline Safety, Regulatory Certainty and Job Creation Act of 2011 was signed into law.  The law increased maximum penalties for violating federal pipeline safety regulations and directs the DOT and Secretary of Transportation to conduct further review or studies on issues that may or may not be material to us. These issues include but are not limited to the following:
	•	an evaluation on whether hazardous natural gas liquids and natural gas pipeline integrity-management requirements should be expanded beyond current high-consequence areas;
	•	a review of all natural gas and hazardous natural gas liquids gathering pipeline exemptions;
	•	a verification of records for pipelines in Class 3 and 4 locations and high-consequence areas to confirm maximum allowable operating pressures; and
	•	a requirement to test previously untested pipelines operating above 30 percent yield strength in high-consequence areas.
	The potential capital and operating expenditures related to this legislation, the associated regulations or other new pipeline safety regulations are unknown.
	Financial Markets Legislation - The Dodd-Frank Act represents a far-reaching overhaul of the framework for regulation of United States financial markets. The CFTC has issued final regulations for most of the provisions of the Dodd-Frank Act, and we have implemented measures to comply with the regulations that are applicable to our businesses. ONEOK Partners continues to participate in financial markets for hedging certain risks inherent in its business, including commodity-price and interest-rate risks. Although the impact to date has not been material, we continue to monitor proposed regulations and the impact these regulations may have on our business and risk-management strategies in the future.
	Legal Proceedings - Gas Index Pricing Litigation - As previously reported, ONEOK and its subsidiary, ONEOK Energy Services Company L.P. (OESC), along with several other energy companies, are defending multiple lawsuits arising from alleged market manipulation or false reporting of natural gas prices to natural gas-index publications. On April 10, 2013, the United States Court of Appeals for the Ninth Circuit reversed the summary judgments that had been granted in favor of ONEOK, OESC and other unaffiliated defendants in the following cases: Reorganized FLI, Learjet, Arandell, Heartland and NewPage. The Ninth Circuit also reversed the summary judgment that had been granted in favor of OESC on all state law claims asserted in the Sinclair case. The Ninth Circuit remanded the cases back to the United States District Court for the District of Nevada for further proceedings. ONEOK, OESC and the other unaffiliated defendants filed a Petition for Writ of Certiorari with the United States Supreme Court on August 26, 2013. The Ninth Circuit has ordered the cases stayed until the final disposition of the Petition for Writ of Certiorari.
	Because of the uncertainty surrounding the Gas Index Pricing Litigation, including an insufficient description of the purported classes and other related matters, we cannot reasonably estimate a range of potential exposures at this time. However, it is reasonably possible that the ultimate resolution of these matters could result in future charges that may be material to our results of operations.
	Other Legal Proceedings - We are a party to various other litigation matters and claims that have arisen in the normal course of our operations. While the results of these various other litigation matters and claims cannot be predicted with certainty, we believe the reasonably possible losses on such matters, individually and in the aggregate, are not material. Additionally, we believe the probable final outcome of such matters will not have a material adverse effect on our consolidated results of operations, financial position or cash flows.
	ONE Gas Separation - In connection with the separation of ONE Gas, we entered into a Separation and Distribution Agreement with ONE Gas, which sets forth the agreements between us and ONE Gas regarding the principal transactions necessary to effect the separation, including cross-indemnities between us and ONE Gas. In general, we agreed to indemnify ONE Gas for any liabilities relating to our business following the separation, including ONEOK Partners and our energy services business, and ONE Gas agreed to indemnify us for liabilities relating to the natural gas distribution business. If a liability does not relate to either our remaining business or to ONE Gas, then we and ONE Gas will each be responsible for a portion of such liability.
	In addition, we entered into a Transition Services Agreement with ONE Gas. Under this agreement, ONEOK and ONE Gas agreed to provide each other with various services, including services relating to treasury and risk management, accounting, human resources and payroll management, tax compliance, telecommunications services and information technology services.

SEGMENTS

SEGMENTS	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
SEGMENTS	'
	N.	SEGMENTS
	Segment Descriptions - Our reportable business segments are based upon the segments of ONEOK Partners, which include the following:
	•	the Natural Gas Gathering and Processing segment gathers and processes natural gas;
	•	the Natural Gas Liquids segment gathers, treats, fractionates and transports NGLs and stores, markets and distributes NGL products; and
	•	the Natural Gas Pipelines segment operates regulated interstate and intrastate natural gas transmission pipelines and natural gas storage facilities.
	Change in Reportable Segments - On January 31, 2014, we completed the separation of our former natural gas distribution business into a stand-alone publicly traded company called ONE Gas. ONE Gas consists of our former Natural Gas Distribution segment. On March 31, 2014, we completed the accelerated wind down of our Energy Services segment. These former segments are included in discontinued operations effective with this quarterly report. See Notes A and B for additional information.
	Following the separation of our natural gas distribution business into ONE Gas and wind down of our energy services business, our chief operating decision maker reviews the financial performance of each of the three businesses of ONEOK Partners on a regular basis to assess the performance of, and allocate resources to, ONEOK Partners. As a result, our reportable segments have changed to reflect the three business segments of ONEOK Partners. Prior periods presented have been recast to conform to the current presentation.
	Accounting Policies - We evaluate performance based principally on each segment’s operating income and equity earnings. The accounting policies of the segments are described in Note A of the Notes to Consolidated Financial Statements in our Annual Report.  Affiliate and intersegment sales are recorded on the same basis as sales to unaffiliated customers.  Net margin is comprised of total revenues less cost of sales and fuel.  Cost of sales and fuel includes commodity purchases, fuel, storage and transportation costs. Revenues from sales and services provided by ONEOK Partners to our former Natural Gas Distribution segment, which were previously eliminated in consolidation, are now reported as third-party revenues.
	Customers - The primary customers of the Natural Gas Gathering and Processing segment are major and independent crude oil and natural gas production companies.  The Natural Gas Liquids segment’s customers are primarily NGL and natural gas gathering and processing companies, major and independent crude oil and natural gas production companies, propane distributors, ethanol producers and petrochemical, refining and NGL marketing companies. The Natural Gas Pipelines segment’s customers include natural gas distribution, electric-generation, natural gas marketing and petrochemical companies.
	For the three months ended March 31, 2014 and 2013, ONEOK Partners had no single customer from which it received 10 percent or more of consolidated revenues.
	Operating Segment Information - The following tables set forth certain selected financial information for our and ONEOK Partners’ operating segments for the periods indicated:
	Three Months Ended	Natural Gas			Natural Gas			Natural Gas			Other and			Total
	31-Mar-14	Gathering and			Liquids (a)			Pipelines (b)			Eliminations (c)
		Processing
		(Thousands of dollars)
	Sales to unaffiliated customers	$	347,016		$	2,670,655		$	91,106		$	993		$	3,109,770
	Sales to affiliated customers	41,214			—			12,312			—			53,526
	Intersegment revenues	373,895			41,157			1,375			(416,427		)	—
	Total revenues	$	762,125		$	2,711,812		$	104,793		$	(415,434	)	$	3,163,296
	Net margin	$	153,554		$	268,978		$	93,489		$	(5,394	)	$	510,627
	Operating costs	64,824			65,102			27,462			(8,277		)	149,111
	Depreciation and amortization	28,842			27,078			10,815			679			67,414
	Gain (loss) on sale of assets	(19		)	(48		)	(83		)	165			15
	Operating income	$	59,869		$	176,750		$	55,129		$	2,369		$	294,117
	Equity earnings from investments	$	5,486		$	4,764		$	23,409		$	—		$	33,659
	Investments in unconsolidated affiliates	$	333,054		$	489,120		$	406,880		$	—		$	1,229,054
	Total assets	$	4,048,332		$	6,861,829		$	1,848,594		$	894,379		$	13,653,134
	Noncontrolling interests in consolidated	$	4,597		$	—		$	—		$	2,538,610		$	2,543,207
	subsidiaries
	Capital expenditures	$	122,891		$	273,063		$	6,627		$	26,944		$	429,525
	(a) - The Natural Gas Liquids segment has regulated and nonregulated operations. The Natural Gas Liquids segment’s regulated operations had revenues of $135.8 million, of which $111.6 million related to sales within the segment, net margin of $84.7 million and operating income of $45.1 million.
	(b) - The Natural Gas Pipelines segment has regulated and nonregulated operations. The Natural Gas Pipelines segment’s regulated operations had revenues of $81.3 million, net margin of $68.6 million and operating income of $35.1 million.
	(c) - Our Other segment includes assets and capital expenditures of discontinued operations of $179.6 million and $23.9 million, respectively.
	Three Months Ended	Natural Gas			Natural Gas			Natural Gas			Other and			Total
	31-Mar-13	Gathering and			Liquids (a)			Pipelines (b)			Eliminations (c)
		Processing
		(Thousands of dollars)
	Sales to unaffiliated customers	$	137,245		$	2,238,243		$	59,325		$	508		$	2,435,321
	Sales to affiliated customers	55,658			—			26,976			—			82,634
	Intersegment revenues	244,611			26,425			(272		)	(270,764		)	—
	Total revenues	$	437,514		$	2,264,668		$	86,029		$	(270,256	)	$	2,517,955
	Net margin	$	109,285		$	186,620		$	74,072		$	1,130		$	371,107
	Operating costs	51,688			59,802			27,166			2,479			141,135
	Depreciation and amortization	23,904			19,738			11,036			605			55,283
	Gain (loss) on sale of assets	28			9			4			—			41
	Operating income	$	33,721		$	107,089		$	35,874		$	(1,954	)	$	174,730
	Equity earnings from investments	$	6,331		$	3,135		$	16,389		$	—		$	25,855
	Investments in unconsolidated affiliates	$	335,140		$	496,800		$	388,189		$	—		$	1,220,129
	Total assets	$	3,146,236		$	5,647,351		$	1,799,121		$	4,853,511		$	15,446,219
	Noncontrolling interests in consolidated	$	4,691		$	—		$	—		$	2,065,088		$	2,069,779
	subsidiaries
	Capital expenditures	$	163,948		$	274,165		$	5,342		$	57,610		$	501,065
	(a) - The Natural Gas Liquids segment has regulated and nonregulated operations. The Natural Gas Liquids segment’s regulated operations had revenues of $108.2 million, of which $84.6 million related to sales within the segment, net margin of $61.5 million and operating income of $31.3 million.
	(b) - The Natural Gas Pipelines segment has regulated and nonregulated operations. The Natural Gas Pipelines segment’s regulated operations had revenues of $68.4 million, net margin of $57.7 million and operating income of $23.8 million.
	(c) - Our Other segment includes assets and capital expenditures of discontinued operations of $3.8 billion and $53.8 million, respectively.

SUMMARY_OF_SIGNIFICANT_ACCOUNT1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Accounting	'
	Our accompanying unaudited consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC. These statements have been prepared in accordance with GAAP and reflect all adjustments that, in our opinion, are necessary for a fair presentation of the results for the interim periods presented.  All such adjustments are of a normal recurring nature. The 2013 year-end consolidated balance sheet data was derived from our audited financial statements but does not include all disclosures required by GAAP.  These unaudited consolidated financial statements should be read in conjunction with our audited consolidated financial statements in our Annual Report.
	Our significant accounting policies are consistent with those disclosed in Note A of the Notes to Consolidated Financial Statements in our Annual Report.
	Organization and Nature of Operations - On January 31, 2014, we completed the separation of our natural gas distribution business into a stand-alone publicly traded company called ONE Gas. On March 31, 2014, we completed the accelerated wind down of our energy services business. ONEOK and its subsidiaries continue to be the sole general partner and own limited partner units of ONEOK Partners (NYSE: OKS), which together represented an aggregate 41.0 percent interest in ONEOK Partners at March 31, 2014. The results of operations for our former natural gas distribution and energy services businesses have been classified as discontinued operations for all periods presented. See Note B for additional information.
	Unless indicated otherwise, the information in the Notes to the Consolidated Financial Statements relates to our continuing operations.
Segment Reporting, Policy	'
	Change in Reportable Segments - Following the separation of our natural gas distribution business into ONE Gas and wind down of our energy services business, our chief operating decision maker reviews the financial performance of each of the three businesses of ONEOK Partners on a regular basis to assess the performance of, and allocate resources to, ONEOK Partners. As a result, our reportable segments have changed to reflect the three business segments of ONEOK Partners, which include the following:
	•	the Natural Gas Gathering and Processing segment, which gathers, treats and processes natural gas;
	•	the Natural Gas Liquids segment, which gathers, treats, fractionates and transports NGLs and stores, markets and distributes NGL products; and
	•	the Natural Gas Pipelines segment, which operates regulated interstate and intrastate natural gas transmission pipelines and natural gas storage facilities.
	We have reflected the change in reporting segments for all periods presented. See Note N for additional information.
Income Taxes	'
	Income Taxes - Deferred income taxes are recorded for the difference between the financial statement and income tax basis of assets and liabilities and carryforward items, based on income tax laws and rates existing at the time the temporary differences are expected to reverse. Deferred tax liabilities and deferred income tax expense were reduced by $34.6 million in the first quarter 2014 due to a reduction in our estimate of the effective state income tax rate to reflect a change in the mix of taxable income in the states in which we now operate, resulting from the separation of our former natural gas distribution business and the wind down of our energy services business. We also recorded a valuation allowance of $8.2 million for state tax credits as it is more likely than not that we will not be able to utilize these credits as a result of the separation of our former natural gas distribution business and the wind down of our energy services business. Together, these adjustments resulted in a net $26.4 million reduction in deferred tax liabilities and deferred income tax expense.
Accounting Standards Update 2014-08 [Member]	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'
New Accounting Pronouncement or Change in Accounting Principle, Description	'Recently Issued Accounting Standards Update - In April 2014, the FASB issued ASU 2014-08, bReporting Discontinued Operations and Disclosures of Disposals of Components of an Entity,b which alters the definition of a discontinued operation to include only asset disposals that represent a strategic shift with a major effect on an entity's operations and financial results.B The amendments also require more extensive disclosures about a discontinued operationbs assets, liabilities, income, expenses and cash flows. This guidance will be effective for interim and annual periods for all assets that are disposed of or classified as being held for sale in fiscal years that begin on or after December 15, 2014. We will adopt this guidance beginning in the first quarter 2015, and we are evaluating the impact on us.

FAIR_VALUE_MEASUREMENTS_Fair_V

FAIR VALUE MEASUREMENTS Fair Value Accounting Policy (Policies)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments, Policy [Policy Text Block]	'
	Determining Fair Value - We define fair value as the price that would be received from the sale of an asset or the transfer of a liability in an orderly transaction between market participants at the measurement date.  We use market and income approaches to determine the fair value of our assets and liabilities and consider the markets in which the transactions are executed.  We measure the fair value of groups of financial assets and liabilities consistent with how a market participant would price the net risk exposure at the measurement date.
	In the first quarter 2014, outstanding commodity derivative positions with third parties entered into by our energy services business on ONEOK Partners’ behalf were transferred to ONEOK Partners. In the future, ONEOK Partners expects to enter into commodity derivative financial contracts directly with unaffiliated third parties.
	While many of the contracts in ONEOK Partners’ portfolio are executed in liquid markets where price transparency exists, some contracts are executed in markets for which market prices may exist, but the market may be relatively inactive.  This results in limited price transparency that requires management’s judgment and assumptions to estimate fair values.  For certain transactions, ONEOK Partners utilizes modeling techniques using NYMEX-settled pricing data, historical correlations of NGL product prices to crude oil prices and implied forward LIBOR curves. Inputs into ONEOK Partners’ fair value estimates include commodity-exchange prices, over-the-counter quotes, historical correlations of pricing data and LIBOR and other liquid money-market instrument rates.  ONEOK Partners also utilizes internally developed basis curves that incorporate observable and unobservable market data.  ONEOK Partners validates its valuation inputs with third-party information and settlement prices from other sources, where available.
	In addition, as prescribed by the income approach, ONEOK Partners computes the fair value of its derivative portfolio by discounting the projected future cash flows from its derivative assets and liabilities to present value using interest-rate yields to calculate present-value discount factors derived from LIBOR, Eurodollar futures and interest-rate swaps.  ONEOK Partners also takes into consideration the potential impact on market prices of liquidating positions in an orderly manner over a reasonable period of time under current market conditions.  It considers current market data in evaluating counterparties’, as well as its own, nonperformance risk, net of collateral, by using specific and sector bond yields and monitoring the credit default swap markets.  Although ONEOK Partners uses its best estimates to determine the fair value of the derivative contracts it has executed, the ultimate market prices realized could differ from its estimates, and the differences could be material.
	The fair value of ONEOK Partners’ forward-starting interest-rate swaps is determined using financial models that incorporate the implied forward LIBOR yield curve for the same period as the future interest-rate swap settlements.
	Fair Value Hierarchy - At each balance sheet date, we and ONEOK Partners utilize a fair value hierarchy to classify fair value amounts recognized or disclosed in the financial statements based on the observability of inputs used to estimate such fair value. The levels of the hierarchy are described below:
	•	Level 1 - fair value measurements are based on unadjusted quoted prices in active markets, including NYMEX-settled prices and actively quoted prices for equity securities. These balances are comprised predominantly of exchange-traded derivative contracts for natural gas and crude oil. Also included in Level 1 are equity securities.
	•	Level 2 - fair value measurements are based on significant observable pricing inputs, such as NYMEX-settled prices for natural gas and crude oil, and financial models that utilize implied forward LIBOR yield curves for interest-rate swaps.
	•	Level 3 - fair value measurements are based on inputs that may include one or more unobservable inputs, including internally developed basis curves that incorporate observable and unobservable market data, NGL price curves from broker quotes, market volatilities derived from the most recent NYMEX close spot prices and forward LIBOR curves, and adjustments for the credit risk of ONEOK Partners’ counterparties.  ONEOK Partners corroborates the data on which its fair value estimates are based using its market knowledge of recent transactions, analysis of historical correlations and validation with independent broker quotes.  These balances categorized as Level 3 are comprised of derivatives for natural gas and NGLs.  ONEOK Partners does not believe that its Level 3 fair value estimates have a material impact on its results of operations, as the majority of its derivatives are accounted for as hedges for which ineffectiveness is not material.

RISK_MANAGEMENT_AND_HEDGING_AC1

RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Policies)	3 Months Ended
	Mar. 31, 2014
RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES [Abstract]	'
Accounting treatment for derivative instruments	'
	Accounting Treatment - We and ONEOK Partners record all derivative instruments at fair value, with the exception of normal purchases and normal sales that are expected to result in physical delivery.  The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and, if so, the reason for holding it.
	The table below summarizes the various ways in which we and ONEOK Partners account for derivative instruments and the impact on our consolidated financial statements:
			Recognition and Measurement
	Accounting Treatment		Balance Sheet		Income Statement
	Normal purchases and normal	-	Fair value not recorded	-	Change in fair value not recognized in earnings
	sales
	Mark-to-market	-	Recorded at fair value	-	Change in fair value recognized in earnings
	Cash flow hedge	-	Recorded at fair value	-	Ineffective portion of the gain or loss on the
					derivative instrument is recognized in earnings
		-	Effective portion of the gain or loss on the	-	Effective portion of the gain or loss on the
			derivative instrument is reported initially		derivative instrument is reclassified out of
			as a component of accumulated other		accumulated other comprehensive income (loss)
			comprehensive income (loss)		into earnings when the forecasted transaction
					affects earnings
	Fair value hedge	-	Recorded at fair value	-	The gain or loss on the derivative instrument is
					recognized in earnings
		-	Change in fair value of the hedged item is	-	Change in fair value of the hedged item is
			recorded as an adjustment to book value		recognized in earnings
	Under certain conditions, we and ONEOK Partners designate derivative instruments as a hedge of exposure to changes in fair values or cash flows. We and ONEOK Partners formally document all relationships between hedging instruments and hedged items, as well as risk-management objectives, strategies for undertaking various hedge transactions and methods for assessing and testing correlation and hedge ineffectiveness. We and ONEOK Partners specifically identify the forecasted transaction that has been designated as the hedged item. We and ONEOK Partners assess the effectiveness of hedging relationships quarterly by performing an effectiveness analysis on fair value and cash flow hedging relationships to determine whether the hedge relationships are highly effective on a retrospective and prospective basis.  ONEOK Partners also documents normal purchases and normal sales transactions expected to result in physical delivery and that are exempted from derivative accounting treatment.
	The presentation of settled derivative instruments on either a gross or net basis in our Consolidated Statements of Income is dependent on the relevant facts and circumstances of our different types of activities rather than based solely on the terms of the individual contracts.  All financially settled derivative instruments are reported on a net basis in revenues in our Consolidated Statements of Income.  The realized revenues and purchase costs of derivative instruments that are not considered held for trading purposes and nonderivative contracts are reported on a gross basis. Derivatives that qualify as normal purchases or normal sales that are expected to result in physical delivery are also reported on a gross basis.
	Cash flows from futures, forwards and swaps that are accounted for as hedges are included in the same category as the cash flows from the related hedged items in our Consolidated Statements of Cash Flows.

ONEOK_PARTNERS_Policies

ONEOK PARTNERS (Policies)	3 Months Ended
	Mar. 31, 2014
Related Party Transactions [Abstract]	'
Allocation of Costs Incurred by Related Party, Policy [Policy Text Block]	'
	We provide a variety of services to our affiliates, including cash management and financial services, legal and administrative services by our employees and management, insurance and office space leased in our headquarters building and other field locations.  Where costs are incurred specifically on behalf of an affiliate, the costs are billed directly to the affiliate by us.  In other situations, the costs may be allocated to the affiliates through a variety of methods, depending upon the nature of the expenses and the activities of the affiliates.  For example, a service that applies equally to all employees is allocated based upon the number of employees in each affiliate.  However, an expense benefiting the consolidated company but having no direct basis for allocation is allocated by the modified Distrigas method, a method using a combination of ratios that include gross plant and investment, operating income and payroll expense.  For the three months ended March 31, 2014 and 2013, it is not practicable to determine what these general overhead costs would be on a stand-alone basis. As a result of the separation of the natural gas distribution business and the wind down of the energy services business, general overhead costs will be allocated primarily to ONEOK Partners beginning in the second quarter 2014.
Cash Distributions	'
	Cash Distributions - We receive distributions from ONEOK Partners on the common and Class B units we own and the 2 percent general partner interest, which includes our incentive distribution rights.  Under the Partnership Agreement, distributions are made to the partners with respect to each calendar quarter in an amount equal to 100 percent of available cash as defined in the Partnership Agreement.  Available cash generally will be distributed 98 percent to limited partners and 2 percent to the general partner.  The general partner’s percentage interest in quarterly distributions is increased after certain specified target levels are met during the quarter.  Under the incentive distribution provisions, as set forth in the Partnership Agreement, the general partner receives:
	•	15 percent of amounts distributed in excess of $0.3025 per unit;
	•	25 percent of amounts distributed in excess of $0.3575 per unit; and
	•	50 percent of amounts distributed in excess of $0.4675 per unit.

SEGMENTS_Policies

SEGMENTS (Policies)	3 Months Ended
	Mar. 31, 2014
Segment Accounting Policies [Abstract]	'
Segments Accounting Policies [Text Block]	'
	Accounting Policies - We evaluate performance based principally on each segment’s operating income and equity earnings. The accounting policies of the segments are described in Note A of the Notes to Consolidated Financial Statements in our Annual Report.  Affiliate and intersegment sales are recorded on the same basis as sales to unaffiliated customers.  Net margin is comprised of total revenues less cost of sales and fuel.  Cost of sales and fuel includes commodity purchases, fuel, storage and transportation costs.

DISCONTINUED_OPERATIONS_Tables

DISCONTINUED OPERATIONS (Tables)	3 Months Ended
	Mar. 31, 2014
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 period indicated:
		Three Months Ended
		31-Mar-14
		(Millions of dollars)
	Beginning balance	$	122
	Noncash charges	1.7
	Settlements	(12.8		)
	Accretion	0.6
	Ending balance	$	111.5
Components of Net Income (Loss) [Member]	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
	Results of Operations of Discontinued Operations - The results of operations for our former natural gas distribution and energy services businesses have been reported as discontinued operations for all periods presented. The tables below provide selected financial information reported in discontinued operations in the Consolidated Statements of Income:
			Three Months Ended
			31-Mar-14
			Natural Gas				Energy			Total
			Distribution				Services
			(Thousands of dollars)
	Revenues		$	287,249			$	353,404		$	640,653
	Cost of sales and fuel		190,893				364,648			555,541
	Net margin		96,356				(11,244		)	85,112
	Operating costs		59,431			(a)	3,127			62,558
	Depreciation and amortization		11,035				319			11,354
	Operating income (loss)		25,890				(14,690		)	11,200
	Other income (expense), net		(888		)		(7		)	(895		)
	Interest expense, net		(4,592		)		(413		)	(5,005		)
	Income taxes		(10,670		)		7,144			(3,526		)
	Income from discontinued operations, net		$	9,740			$	(7,966	)	$	1,774
	(a) - Includes approximately $21.7 million of costs related to the ONE Gas separation.
			Three Months Ended
			31-Mar-13
			Natural Gas				Energy			Total
			Distribution				Services
			(Thousands of dollars)
	Revenues		$	635,931			$	470,195		$	1,106,126
	Cost of sales and fuel		384,257				469,521			853,778
	Net margin		251,674				674			252,348
	Operating costs		113,403				4,888			118,291
	Depreciation and amortization		34,867				71			34,938
	Operating income (loss)		103,404				(4,285		)	99,119
	Other income (expense), net		619				28			647
	Interest expense, net		(15,306		)		(645		)	(15,951		)
	Income taxes		(30,288		)		1,675			(28,613		)
	Income from discontinued operations, net		$	58,429			$	(3,227	)	$	55,202
Carrying Value of Assets and Liabilities [Member]	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
	Statement of Financial Position of Discontinued Operations - The following table presents the carrying value of assets and liabilities of our former natural gas distribution and energy services businesses included in assets and liabilities of discontinued operations in the Consolidated Balance Sheets for the period presented:
			31-Dec-13
			Natural Gas				Energy			Total
			Distribution				Services
			(Thousands of dollars)
	Assets
	Cash and cash equivalents		$	3,535			$	213		$	3,748
	Accounts receivable, net		368,214				87,315			455,529
	Gas and natural gas liquids in storage		166,128				62,663			228,791
	Other current assets		30,328				29,476			59,804
	Net property, plant and equipment		3,065,272				279			3,065,551
	Goodwill		157,953				—			157,953
	Other assets		402,161				385			402,546
	Total assets		$	4,193,591			$	180,331		$	4,373,922
	Liabilities
	Current maturities of long-term debt		$	6			$	—		$	6
	Accounts payable		168,785				77,287			246,072
	Other current liabilities		168,964				40,646			209,610
	Long-term debt, excluding current maturities		1,318				—			1,318
	Deferred income taxes		826,921				(35,221		)	791,700
	Other deferred credits		184,214				70,998			255,212
	Total liabilities		$	1,350,208			$	153,710		$	1,503,918

FAIR_VALUE_MEASUREMENTS_Tables

FAIR VALUE MEASUREMENTS (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Recurring Fair Value Measurments	'
	Recurring Fair Value Measurements - The following tables set forth our recurring fair value measurements for our continuing operations for the periods indicated:
		March 31, 2014
		Level 1			Level 2			Level 3			Total - Gross			Netting (a)			Total - Net (b)
		(Thousands of dollars)
	Assets
	Derivatives
	Commodity contracts
	Financial contracts	$	133		$	39		$	542		$	714		$	(573	)	$	141
	Physical contracts	—			—			3,332			3,332			(926		)	2,406
	Interest-rate contracts	—			38,384			—			38,384			—			38,384
	Total derivatives	133			38,423			3,874			42,430			(1,499		)	40,931
	Available-for-sale investment securities (c)	1,480			—			—			1,480			—			1,480
	Total assets	$	1,613		$	38,423		$	3,874		$	43,910		$	(1,499	)	$	42,411
	Liabilities
	Derivatives
	Commodity contracts
	Financial contracts	$	(3,099	)	$	(1,722	)	$	(401	)	$	(5,222	)	$	3,326		$	(1,896	)
	Physical contracts	—			—			(1,501		)	(1,501		)	926			(575		)
	Interest-rate contracts	—			(4,574		)	—			(4,574		)	—			(4,574		)
	Total liabilities	$	(3,099	)	$	(6,296	)	$	(1,902	)	$	(11,297	)	$	4,252		$	(7,045	)
	(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheets on a net basis.  ONEOK Partners nets derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and ONEOK Partners.  At March 31, 2014, ONEOK Partners held no cash collateral and posted $2.8 million cash collateral with various counterparties.
	(b) - Included in other current assets, other assets or other current liabilities in our Consolidated Balance Sheets.
	(c) - Available-for-sale investment securities represent assets of ONEOK.
		December 31, 2013
		Level 1			Level 2			Level 3			Total - Gross			Netting (a)			Total - Net (b)
		(Thousands of dollars)
	Assets
	Derivatives
	Commodity contracts
	Financial contracts	$	—		$	3,657		$	2,812		$	6,469		$	(1,746	)	$	4,723
	Physical contracts	—			—			2,023			2,023			(946		)	1,077
	Interest-rate contracts	—			54,503			—			54,503			—			54,503
	Total derivatives	—			58,160			4,835			62,995			(2,692		)	60,303
	Available-for-sale investment securities (c)	1,569			—			—			1,569			—			1,569
	Total assets	$	1,569		$	58,160		$	4,835		$	64,564		$	(2,692	)	$	61,872
	Liabilities
	Derivatives
	Commodity contracts
	Financial contracts	$	—		$	(2,953	)	$	(2,154	)	$	(5,107	)	$	1,746		$	(3,361	)
	Physical contracts	—			—			(3,463		)	(3,463		)	946			(2,517		)
	Total derivative liabilities	$	—		$	(2,953	)	$	(5,617	)	$	(8,570	)	$	2,692		$	(5,878	)
	(a) - Derivative assets and liabilities are presented in our Consolidated Balance Sheets on a net basis.  ONEOK Partners nets derivative assets and liabilities when a legally enforceable master-netting arrangement exists between the counterparty to a derivative contract and ONEOK Partners. At December 31, 2013, we and ONEOK Partners had no cash collateral held or posted.
	(b) - Included in other current assets, other assets or other current liabilities in our Consolidated Balance Sheets.
	(c) - Available-for-sale investment securities represent assets of ONEOK.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	'
	The following table sets forth the reconciliation of our Level 3 fair value measurements for our continuing operations for the periods indicated:
		Three Months Ended
		March 31,
	Derivative Assets (Liabilities)	2014			2013
		(Thousands of dollars)
	Net assets (liabilities) at beginning of period	$	(782	)	$	(2,423	)
	Total realized/unrealized gains (losses):
	Included in earnings (a)	(928		)	—
	Included in other comprehensive income (loss)	(52		)	(2,432		)
	Purchases, issuances and settlements	3,734			—
	Net assets (liabilities) at end of period	$	1,972		$	(4,855	)
	(a) - Reported in commodity sales revenues and cost of sales and fuel in our Consolidated Statements of Income.

RISK_MANAGEMENT_AND_HEDGING_AC2

RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Tables)	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Fair value of derivatives	'
	Fair Values of Derivative Instruments - See Note C for a discussion of the inputs associated with our fair value measurements. The following table sets forth the fair values of derivative instruments for our continuing operations for the periods indicated:
		March 31, 2014								December 31, 2013
		Assets (a)				(Liabilities) (a)				Assets (a)			(Liabilities) (a)
		(Thousands of dollars)
	Derivatives designated as hedging instruments
	Commodity contracts
	Financial contracts	$	714			$	(5,222	)		$	6,469		$	(5,107	)
	Physical contracts	3,301				(1,501		)		1,064			(3,463		)
	Interest-rate contracts	38,384				(4,574		)		54,503			—
	Total derivatives designated as hedging instruments	42,399				(11,297		)		62,036			(8,570		)
	Derivatives not designated as hedging instruments
	Commodity contracts
	Physical contracts	31				—				959			—
	Total derivatives not designated as hedging instruments	31				—				959			—
	Total derivatives	$	42,430			$	(11,297	)		$	62,995		$	(8,570	)
	(a) - ONEOK Partners’ derivative assets and liabilities are included on a net basis in other current assets, other assets or other current liabilities on our Consolidated Balance Sheets.
Notional amounts of derivative instruments	'
	Notional Quantities for Derivative Instruments - The following table sets forth the notional quantities for derivative instruments for our continuing operations for the periods indicated:
			March 31, 2014								December 31, 2013
		Contract	Purchased/				Sold/				Purchased/			Sold/
		Type	Payor				Receiver				Payor			Receiver
	Derivatives designated as hedging instruments:
	Cash flow hedges
	Fixed price
	- Natural gas (Bcf)	Futures and swaps	—				(41.6		)		—			(48.1		)
	- Crude oil and NGLs (MMbbl)	Futures, forwards	—				(3.7		)		—			(4.0		)
		and swaps
	Basis
	- Natural gas (Bcf)	Futures and swaps	—				(41.6		)		—			(48.1		)
	Interest-rate contracts (Millions of dollars)	Forward-starting	$	900			$	—			$	400		$	—
		swaps
Schedule of cash flow hedging instruments effect on comprehensive income (loss)	'
	The following table sets forth the effects of cash flow hedges recognized in other comprehensive income (loss) for our continuing operations for the periods indicated:
	Derivatives in Cash Flow	Three Months Ended
	Hedging Relationships	March 31,
		2014				2013
		(Thousands of dollars)
	Commodity contracts	$	(35,762	)		$	(19,768	)
	Interest-rate contracts	(20,693		)		6,788
	Total unrealized gain (loss) recognized in other comprehensive income (loss) on derivatives	$	(56,455	)		$	(12,980	)
	(effective portion)
Schedule of cash flow hedging instruments effect on income	'
	The following table sets forth the effect of cash flow hedges on our Consolidated Statements of Income for our continuing operations for the periods indicated:
	Derivatives in Cash Flow	Location of Gain (Loss) Reclassified from	Three Months Ended
	Hedging Relationships	Accumulated Other Comprehensive Income	March 31,
		(Loss) into Net Income (Effective Portion)	2014				2013
			(Thousands of dollars)
	Commodity contracts	Commodity sales revenues	$	(26,419	)		$	2,566
	Interest-rate contracts	Interest expense	(11,321		)		(3,437		)
	Total gain (loss) reclassified from accumulated other comprehensive income (loss) into net income		$	(37,740	)		$	(871	)
	on derivatives (effective portion)

LONGTERM_DEBT_Long_term_debt_t

LONG-TERM DEBT Long term debt table (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Instrument [Line Items]	'
Schedule of Long-term Debt Instruments [Table Text Block]	'
	he following table details information about each of the three series of Senior Notes:
		(In millions)
	2.07% notes due February 1, 2019	$	300
	3.61% notes due February 1, 2024	300
	4.658% notes due February 1, 2044	600
	Total	$	1,200

EQUITY_Tables

EQUITY (Tables)	3 Months Ended
	Mar. 31, 2014
Equity [Abstract]	'
Changes in equity, including other comprehensive income, net of tax	'
	The following table sets forth the changes in equity attributable to us and our noncontrolling interests, including other comprehensive income, net of tax, for the periods indicated:
		Three Months Ended										Three Months Ended
		31-Mar-14										31-Mar-13
		ONEOK				Noncontrolling			Total			ONEOK			Noncontrolling			Total
		Shareholders’				Interests in			Equity			Shareholders’			Interests in			Equity
		Equity				Consolidated						Equity			Consolidated
						Subsidiaries									Subsidiaries
		(Thousands of dollars)
	Beginning balance	$	2,337,851			$	2,507,329		$	4,845,180		$	2,129,609		$	2,102,841		$	4,232,450
	Net income	93,515				112,996			206,511			112,521			53,184			165,705
	Other comprehensive income	8,685				(17,309		)	(8,624		)	(6,355		)	(7,526		)	(13,881		)
	(loss)
	Common stock issued	7,579				—			7,579			2,831			—			2,831
	Common stock dividends	(83,275		)		—			(83,275		)	(73,781		)	—			(73,781		)
	Issuance of common units of	10,996				41,846			52,842			2,956			11,616			14,572
	ONEOK Partners
	Distribution of ONE Gas to shareholders	(1,747,424		)	(a)	—			(1,747,424		)	—			—			—
	Distributions to noncontrolling	—				(101,655		)	(101,655		)	—			(90,336		)	(90,336		)
	interests
	Other	(43,427		)		—			(43,427		)	(33,427		)	—			(33,427		)
	Ending balance	$	584,500			$	2,543,207		$	3,127,707		$	2,134,354		$	2,069,779		$	4,204,133
	(a) - Includes certain estimates expected to be finalized in the second quarter 2014.

ACCUMULATED_OTHER_COMPREHENSIV1

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Accumulated other comprehensive income (loss)	'
	The following table sets forth the balance in accumulated other comprehensive income (loss) for the period indicated:
		Unrealized Gains				Unrealized				Pension and			Accumulated
		(Losses) on Energy				Holding Gains				Postretirement			Other
		Marketing and				(Losses)				Benefit Plan			Comprehensive
		Risk-Management				on Investment				Obligations (a)			Income (Loss) (a)
		Assets/Liabilities (a)				Securities (a)
		(Thousands of dollars)
	1-Jan-14	$	(43,168	)		$	857			$	(79,676	)	$	(121,987	)
	Other comprehensive income (loss) before	(15,508		)		(76		)		45			(15,539		)
	reclassifications
	Amounts reclassified from accumulated other	20,418				—				3,806			24,224
	comprehensive income (loss)
	Other comprehensive income	4,910				(76		)		3,851			8,685
	(loss) attributable to ONEOK
	Transfer to ONE Gas	—				—				3,389			3,389
	March 31, 2014	$	(38,258	)		$	781			$	(72,436	)	$	(109,913	)
	(a) All amounts are presented net of tax.
Statement [Line Items]	'
Disclosure of Reclassification Amount [Text Block]	'
	The following table sets forth the effect of reclassifications from accumulated other comprehensive income (loss) on our Consolidated Statements of Income for the periods indicated:
	Affected Line Item in the		Three Months Ended March 31,								Affected Line Item in the Consolidated
	Consolidated Statements of Income		2014				2013				Statements of Income
			(Thousands of dollars)
	Unrealized (gains) losses on energy marketing
	and risk-management assets/liabilities
	Commodity contracts		$	26,419			$	(2,566	)		Commodity sales revenues
	Interest-rate contracts		11,321				3,437				Interest expense
			37,740				871				Income before income taxes
			(7,896		)		(394		)		Income tax expense
			29,844				477				Income from continuing operations
	Discontinued operations, net of tax		7,683				6,818				Income from discontinued operations
			37,527				7,295				Net income
	Noncontrolling interest		17,109				(148		)		Less: Net income attributable to
											noncontrolling interest
			$	20,418			$	7,443			Net income attributable to ONEOK
	Pension and postretirement benefit plan
	obligations (a)
	Amortization of net loss		$	3,963			$	5,078
	Amortization of unrecognized prior service cost		(367		)		(113		)
	Amortization of unrecognized net asset at		—				7
	adoption
			3,596				4,972				Income before income taxes
			(1,438		)		(1,923		)		Income tax expense
			2,158				3,049				Income from continuing operations
	Discontinued operations, net of tax		1,648				8,209				Income from discontinued operations
			$	3,806			$	11,258			Net income attributable to ONEOK
	Total reclassifications for the period		$	24,224			$	18,701			Net income attributable to ONEOK
	attributable to ONEOK
	(a) These components of accumulated other comprehensive income (loss) are included in the computation of net periodic benefit cost. See Note J for additional detail of our net periodic benefit cost.

EARNINGS_PER_SHARE_Tables

EARNINGS PER SHARE (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	The following tables set forth the computation of basic and diluted EPS from continuing operations for the periods indicated:
		Three Months Ended March 31, 2014
		Income		Shares	Per Share
					Amount
		(Thousands, except per share amounts)
	Basic EPS from continuing operations
	Income from continuing operations attributable to ONEOK available for common	$	91,741	209,130	$	0.44
	stock
	Diluted EPS from continuing operations
	Effect of dilutive securities	—		1,036
	Income from continuing operations attributable to ONEOK available for common	$	91,741	210,166	$	0.44
	stock and common stock equivalents
		Three Months Ended March 31, 2013
		Income		Shares	Per Share
					Amount
		(Thousands, except per share amounts)
	Basic EPS from continuing operations
	Income from continuing operations attributable to ONEOK available for common	$	57,319	205,479	$	0.28
	stock
	Diluted EPS from continuing operations
	Effect of dilutive securities	—		3,979
	Income from continuing operations attributable to ONEOK available for common	$	57,319	209,458	$	0.27
	stock and common stock equivalents

EMPLOYEE_BENEFIT_PLANS_Tables

EMPLOYEE BENEFIT PLANS (Tables)	3 Months Ended
	Mar. 31, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
The components of net periodic benefit cost	'
	The following tables set forth the components of net periodic benefit cost for our pension and postretirement benefit plans for our continuing operations for the periods indicated:
		Pension Benefits
		Three Months Ended
		March 31,
		2014			2013
		(Thousands of dollars)
	Components of net periodic benefit cost
	Service cost	$	1,822		$	1,532
	Interest cost	4,628			3,906
	Expected return on assets	(4,935		)	(4,969		)
	Amortization of unrecognized prior service cost	48			58
	Amortization of net loss	3,755			4,755
	Net periodic benefit cost	$	5,318		$	5,282
		Postretirement Benefits
		Three Months Ended
		March 31,
		2014			2013
		(Thousands of dollars)
	Components of net periodic benefit cost
	Service cost	$	179		$	118
	Interest cost	611			298
	Expected return on assets	(555		)	(314		)
	Amortization of unrecognized net asset at adoption	—			7
	Amortization of unrecognized prior service cost	(415		)	(171		)
	Amortization of net loss	208			323
	Net periodic benefit cost	$	28		$	261

UNCONSOLIDATED_AFFILIATES_Tabl

UNCONSOLIDATED AFFILIATES (Tables)	3 Months Ended
	Mar. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Equity Earnings from Investments	'
	Equity Earnings from Investments - The following table sets forth ONEOK Partners’ equity earnings (losses) from investments for the periods indicated:
		Three Months Ended
		March 31,
		2014			2013
		(Thousands of dollars)
	Northern Border Pipeline	$	23,409		$	16,390
	Overland Pass Pipeline Company	4,731			2,899
	Fort Union Gas Gathering	4,129			3,869
	Bighorn Gas Gathering	(400		)	712
	Other	1,790			1,985
	Equity earnings from investments	$	33,659		$	25,855
Unconsolidated Affiliates Financial Information [Table Text Block]	'
	Unconsolidated Affiliates Financial Information - The following table sets forth summarized combined financial information of ONEOK Partners’ unconsolidated affiliates for the periods indicated:
		Three Months Ended
		March 31,
		2014			2013
		(Thousands of dollars)
	Income Statement
	Operating revenues	$	155,279		$	127,801
	Operating expenses	$	71,679		$	64,271
	Net income	$	78,673		$	58,204
	Distributions paid to ONEOK Partners	$	35,070		$	30,193

ONEOK_PARTNERS_Tables

ONEOK PARTNERS (Tables)	3 Months Ended
	Mar. 31, 2014
Related Party Transactions [Abstract]	'
Ownership interest in ONEOK Partners	'
	Ownership Interest in ONEOK Partners - Our ownership interest in ONEOK Partners is shown in the table below at March 31, 2014:
	General partner interest	2	%
	Limited partner interest (a)	39	%
	Total ownership interest	41	%
	(a) - Represents 19.8 million common units and approximately 73.0 million Class B units, which are convertible, at our option, into common units.
ONEOK Partners' Distributions Paid	'
	The following table shows ONEOK Partners’ distributions paid in the periods indicated:
		Three Months Ended
		March 31,
		2014		2013
		(Thousands, except per unit amounts)
	Distribution per unit	$	0.73	$	0.71
	General partner distributions	$	4,849	$	4,418
	Incentive distributions	68,255		60,437
	Distributions to general partner	73,104		64,855
	Limited partner distributions to ONEOK	67,737		65,880
	Limited partner distributions to noncontrolling interest	101,655		90,189
	Total distributions paid	$	242,496	$	220,924
ONEOK Partners' Distributions Declared	'
	The following table shows ONEOK Partners’ distributions declared for the periods indicated and paid within 45 days of the end of the period:
		Three Months Ended
		March 31,
		2014		2013
		(Thousands, except per unit amounts)
	Distribution per unit	$	0.745	$	0.715
	General partner distributions	$	5,011	$	4,469
	Incentive distributions	71,911		61,576
	Distributions to general partner	76,922		66,045
	Limited partner distributions to ONEOK	69,127		66,344
	Limited partner distributions to noncontrolling interest	104,506		91,039
	Total distributions declared	$	250,555	$	223,428
ONEOK Partners' transactions	'
	The following table shows ONEOK Partners’ transactions with us for the periods indicated:
		Three Months Ended
		March 31,
		2014		2013
		(Thousands of dollars)
	Revenues	$	53,526	$	82,634
	Expenses
	Cost of sales and fuel	$	10,835	$	9,551
	Administrative and general expenses	77,246		72,496
	Total expenses	$	88,081	$	82,047

SEGMENTS_Tables

SEGMENTS (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Segments	'
	The following tables set forth certain selected financial information for our and ONEOK Partners’ operating segments for the periods indicated:
	Three Months Ended	Natural Gas			Natural Gas			Natural Gas			Other and			Total
	31-Mar-14	Gathering and			Liquids (a)			Pipelines (b)			Eliminations (c)
		Processing
		(Thousands of dollars)
	Sales to unaffiliated customers	$	347,016		$	2,670,655		$	91,106		$	993		$	3,109,770
	Sales to affiliated customers	41,214			—			12,312			—			53,526
	Intersegment revenues	373,895			41,157			1,375			(416,427		)	—
	Total revenues	$	762,125		$	2,711,812		$	104,793		$	(415,434	)	$	3,163,296
	Net margin	$	153,554		$	268,978		$	93,489		$	(5,394	)	$	510,627
	Operating costs	64,824			65,102			27,462			(8,277		)	149,111
	Depreciation and amortization	28,842			27,078			10,815			679			67,414
	Gain (loss) on sale of assets	(19		)	(48		)	(83		)	165			15
	Operating income	$	59,869		$	176,750		$	55,129		$	2,369		$	294,117
	Equity earnings from investments	$	5,486		$	4,764		$	23,409		$	—		$	33,659
	Investments in unconsolidated affiliates	$	333,054		$	489,120		$	406,880		$	—		$	1,229,054
	Total assets	$	4,048,332		$	6,861,829		$	1,848,594		$	894,379		$	13,653,134
	Noncontrolling interests in consolidated	$	4,597		$	—		$	—		$	2,538,610		$	2,543,207
	subsidiaries
	Capital expenditures	$	122,891		$	273,063		$	6,627		$	26,944		$	429,525
	(a) - The Natural Gas Liquids segment has regulated and nonregulated operations. The Natural Gas Liquids segment’s regulated operations had revenues of $135.8 million, of which $111.6 million related to sales within the segment, net margin of $84.7 million and operating income of $45.1 million.
	(b) - The Natural Gas Pipelines segment has regulated and nonregulated operations. The Natural Gas Pipelines segment’s regulated operations had revenues of $81.3 million, net margin of $68.6 million and operating income of $35.1 million.
	(c) - Our Other segment includes assets and capital expenditures of discontinued operations of $179.6 million and $23.9 million, respectively.
	Three Months Ended	Natural Gas			Natural Gas			Natural Gas			Other and			Total
	31-Mar-13	Gathering and			Liquids (a)			Pipelines (b)			Eliminations (c)
		Processing
		(Thousands of dollars)
	Sales to unaffiliated customers	$	137,245		$	2,238,243		$	59,325		$	508		$	2,435,321
	Sales to affiliated customers	55,658			—			26,976			—			82,634
	Intersegment revenues	244,611			26,425			(272		)	(270,764		)	—
	Total revenues	$	437,514		$	2,264,668		$	86,029		$	(270,256	)	$	2,517,955
	Net margin	$	109,285		$	186,620		$	74,072		$	1,130		$	371,107
	Operating costs	51,688			59,802			27,166			2,479			141,135
	Depreciation and amortization	23,904			19,738			11,036			605			55,283
	Gain (loss) on sale of assets	28			9			4			—			41
	Operating income	$	33,721		$	107,089		$	35,874		$	(1,954	)	$	174,730
	Equity earnings from investments	$	6,331		$	3,135		$	16,389		$	—		$	25,855
	Investments in unconsolidated affiliates	$	335,140		$	496,800		$	388,189		$	—		$	1,220,129
	Total assets	$	3,146,236		$	5,647,351		$	1,799,121		$	4,853,511		$	15,446,219
	Noncontrolling interests in consolidated	$	4,691		$	—		$	—		$	2,065,088		$	2,069,779
	subsidiaries
	Capital expenditures	$	163,948		$	274,165		$	5,342		$	57,610		$	501,065
	(a) - The Natural Gas Liquids segment has regulated and nonregulated operations. The Natural Gas Liquids segment’s regulated operations had revenues of $108.2 million, of which $84.6 million related to sales within the segment, net margin of $61.5 million and operating income of $31.3 million.
	(b) - The Natural Gas Pipelines segment has regulated and nonregulated operations. The Natural Gas Pipelines segment’s regulated operations had revenues of $68.4 million, net margin of $57.7 million and operating income of $23.8 million.
	(c) - Our Other segment includes assets and capital expenditures of discontinued operations of $3.8 billion and $53.8 million, respectively.

SUMMARY_OF_SIGNIFICANT_ACCOUNT2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Entity [Line Items]	'	'
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	41.00%	41.20%
Reduction in deferred tax liabilities and deferred income tax expense	$34.60	'
Valuation allowance for deferred tax asset	8.2	'
Net change in deferred taxes from change in tax rate and valuation allowance	$26.40	'

DISCONTINUED_OPERATIONS_Detail

DISCONTINUED OPERATIONS (Details) (USD $)	3 Months Ended			3 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014	Jan. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014
				Distribution Regulated Segment [Member]	Distribution Regulated Segment [Member]	2014 [Member]	2015 [Member]	2016 [Member]	2017 - 2023 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'	'	'	'	'
Accumulated charges attributable to exit activities	$111,500,000	'	$122,000,000	'	'	'	'	'	'
Assets	13,653,134,000	15,446,219,000	17,741,481,000	'	4,300,000,000	'	'	'	'
Liabilities	'	'	'	'	2,600,000,000	'	'	'	'
Distribution of ONE Gas to shareholders	-1,747,424,000	0	'	1,700,000,000	'	'	'	'	'
Noncash charges	1,739,000	0	'	'	'	'	'	'	'
Settlements	-12,800,000	'	'	'	'	'	'	'	'
Accretion	600,000	'	'	'	'	'	'	'	'
Effect on Future Cash Flows, Amount	$68,000,000	'	'	'	'	$23,000,000	$23,000,000	$11,000,000	$11,000,000

DISCONTINUED_OPERATIONS_Discon

DISCONTINUED OPERATIONS Discontinue Operation Income Statement Disclosures (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Revenues	$640,653,000	$1,106,126,000
Cost of sales and fuel	555,541,000	853,778,000
Net margin	85,112,000	252,348,000
Operating costs	62,558,000	118,291,000
Depreciation and amortization	11,354,000	34,938,000
Operating income (loss)	11,200,000	99,119,000
Other income (expense), net	-895,000	647,000
Interest expense, net	-5,005,000	-15,951,000
Income taxes	-3,526,000	-28,613,000
Income from discontinued operations, net	1,774,000	55,202,000
Costs related to separation	21,700,000	'
Distribution Regulated Segment [Member]	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Revenues	287,249,000	635,931,000
Cost of sales and fuel	190,893,000	384,257,000
Net margin	96,356,000	251,674,000
Operating costs	59,431,000	113,403,000
Depreciation and amortization	11,035,000	34,867,000
Operating income (loss)	25,890,000	103,404,000
Other income (expense), net	-888,000	619,000
Interest expense, net	-4,592,000	-15,306,000
Income taxes	-10,670,000	-30,288,000
Income from discontinued operations, net	9,740,000	58,429,000
Energy Services [Member]	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Revenues	353,404,000	470,195,000
Cost of sales and fuel	364,648,000	469,521,000
Net margin	-11,244,000	674,000
Operating costs	3,127,000	4,888,000
Depreciation and amortization	319,000	71,000
Operating income (loss)	-14,690,000	-4,285,000
Other income (expense), net	-7,000	28,000
Interest expense, net	-413,000	-645,000
Income taxes	7,144,000	1,675,000
Income from discontinued operations, net	($7,966,000)	($3,227,000)

DISCONTINUED_OPERATIONS_Discon1

DISCONTINUED OPERATIONS Discontinued Operations Balance Sheet Disclosures (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Cash and cash equivalents	'	$3,748,000
Accounts receivable, net	'	455,529,000
Gas and natural gas liquids in storage	'	228,791,000
Other current assets	'	59,804,000
Net property, plant and equipment	'	3,065,551,000
Goodwill	'	157,953,000
Other assets	'	402,546,000
Total assets	'	4,373,922,000
Current maturities of long-term debt	'	6,000
Accounts payable	'	246,072,000
Other current liabilities	'	209,610,000
Long-term debt, excluding current maturities	'	1,318,000
Deferred income taxes	'	791,700,000
Other deferred credits	'	255,212,000
Total liabilities	'	1,503,918,000
Distribution Regulated Segment [Member]	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Cash and cash equivalents	'	3,535,000
Accounts receivable, net	'	368,214,000
Gas and natural gas liquids in storage	'	166,128,000
Other current assets	'	30,328,000
Net property, plant and equipment	'	3,065,272,000
Goodwill	'	157,953,000
Other assets	'	402,161,000
Total assets	'	4,193,591,000
Current maturities of long-term debt	'	6,000
Accounts payable	'	168,785,000
Other current liabilities	'	168,964,000
Long-term debt, excluding current maturities	'	1,318,000
Deferred income taxes	'	826,921,000
Other deferred credits	'	184,214,000
Total liabilities	'	1,350,208,000
Energy Services [Member]	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Cash and cash equivalents	'	213,000
Accounts receivable, net	124,000,000	87,315,000
Gas and natural gas liquids in storage	'	62,663,000
Other current assets	'	29,476,000
Net property, plant and equipment	'	279,000
Goodwill	'	0
Other assets	'	385,000
Total assets	'	180,331,000
Current maturities of long-term debt	'	0
Accounts payable	112,800,000	77,287,000
Other current liabilities	'	40,646,000
Long-term debt, excluding current maturities	'	0
Deferred income taxes	'	-35,221,000
Other deferred credits	'	70,998,000
Total liabilities	'	153,710,000
Current tax assets	15,800,000	'
Deferred tax assets	32,000,000	'
Current capacity release obligations	50,100,000	'
Current tax liability	26,300,000	'
Noncurrent capacity release obligations	$61,400,000	'

FAIR_VALUE_MEASUREMENTS_Part_1

FAIR VALUE MEASUREMENTS - Part 1 (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivatives	'	'
Cash collateral held	$0	$0
Cash collateral posted	2,800	0
Fair Value, Measurements, Recurring [Member]	'	'
Derivatives	'	'
Commodity contracts - financial	141	4,723
Commodity contracts - physical	2,406	1,077
Interest Rate Derivative Assets, at Fair Value	38,384	54,503
Total derivatives assets	40,931	60,303
Other	'	'
Available-for-sale investment securities	1,480	1,569
Total assets	42,411	61,872
Derivatives	'	'
Commodity contracts - financial	-1,896	-3,361
Commodity contracts - physical	-575	-2,517
Interest Rate Derivative Liabilities, at Fair Value	-4,574	'
Total liabilities	7,045	5,878
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Derivatives	'	'
Commodity contracts - financial	133	0
Commodity contracts - physical	0	0
Interest Rate Derivative Assets, at Fair Value	0	0
Total derivatives assets	133	0
Other	'	'
Available-for-sale investment securities	1,480	1,569
Total assets	1,613	1,569
Derivatives	'	'
Commodity contracts - financial	-3,099	0
Commodity contracts - physical	0	0
Interest Rate Derivative Liabilities, at Fair Value	0	'
Total liabilities	3,099	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Derivatives	'	'
Commodity contracts - financial	39	3,657
Commodity contracts - physical	0	0
Interest Rate Derivative Assets, at Fair Value	38,384	54,503
Total derivatives assets	38,423	58,160
Other	'	'
Available-for-sale investment securities	0	0
Total assets	38,423	58,160
Derivatives	'	'
Commodity contracts - financial	-1,722	-2,953
Commodity contracts - physical	0	0
Interest Rate Derivative Liabilities, at Fair Value	-4,574	'
Total liabilities	6,296	2,953
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Derivatives	'	'
Commodity contracts - financial	542	2,812
Commodity contracts - physical	3,332	2,023
Interest Rate Derivative Assets, at Fair Value	0	0
Total derivatives assets	3,874	4,835
Other	'	'
Available-for-sale investment securities	0	0
Total assets	3,874	4,835
Derivatives	'	'
Commodity contracts - financial	-401	-2,154
Commodity contracts - physical	-1,501	-3,463
Interest Rate Derivative Liabilities, at Fair Value	0	'
Total liabilities	1,902	5,617
Fair Value, Measurements, Recurring [Member] | Total Gross, Fair Value Disclosure [Member]	'	'
Derivatives	'	'
Commodity contracts - financial	714	6,469
Commodity contracts - physical	3,332	2,023
Interest Rate Derivative Assets, at Fair Value	38,384	54,503
Total derivatives assets	42,430	62,995
Other	'	'
Available-for-sale investment securities	1,480	1,569
Total assets	43,910	64,564
Derivatives	'	'
Commodity contracts - financial	-5,222	-5,107
Commodity contracts - physical	-1,501	-3,463
Interest Rate Derivative Liabilities, at Fair Value	-4,574	'
Total liabilities	11,297	8,570
Fair Value, Measurements, Recurring [Member] | Netting and Collateral [Member]	'	'
Derivatives	'	'
Commodity contracts - financial	-573	-1,746
Commodity contracts - physical	-926	-946
Interest Rate Derivative Assets, at Fair Value	0	0
Total derivatives assets	-1,499	-2,692
Other	'	'
Available-for-sale investment securities	0	0
Total assets	-1,499	-2,692
Derivatives	'	'
Commodity contracts - financial	3,326	1,746
Commodity contracts - physical	926	946
Interest Rate Derivative Liabilities, at Fair Value	0	'
Total liabilities	($4,252)	($2,692)

FAIR_VALUE_MEASUREMENTS_Fair_V1

FAIR VALUE MEASUREMENTS, Fair Value Measurements - Part 2 (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Total realized/unrealized gains (losses):	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	$0	$0
Derivative Financial Instruments, Assets Liabilities [Member]	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Calculation [Roll Forward]	'	'
Net assets (liabilities) at beginning of period	-782	-2,423
Total realized/unrealized gains (losses):	'	'
Included in earnings	-928	0
Included in other comprehensive income (loss)	-52	-2,432
Purchases, issuances and settlements	3,734	0
Net assets (liabilities) at end of period	$1,972	($4,855)

FAIR_VALUE_MEASUREMENTS_Fair_V2

FAIR VALUE MEASUREMENTS, Fair Value - Part 3 (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Billions, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long-term Debt, Fair Value	$7.80	$8.20
Long-term Debt, Book Value	$7.20	$7.80

RISK_MANAGEMENT_AND_HEDGING_AC3

RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES Part 1 (Details) (USD $)

3 Months Ended

3 Months Ended

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Interest Rate Contract [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

ONEOK Partners [Member]

Financial Derivative Instrument [Member]

Financial Derivative Instrument [Member]

Physical Derivative Instrument [Member]

Physical Derivative Instrument [Member]

Physical Derivative Instrument [Member]

Physical Derivative Instrument [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Commodity Contract [Member]

Interest Rate Contract [Member]

Cash Flow Hedging [Member]

Commodity Contract [Member]

Commodity Contract [Member]

Commodity Contract [Member]

Commodity Contract [Member]

Commodity Contract [Member]

Commodity Contract [Member]

Other Assets [Member]

Other Current Assets [Member]

Forward Starting Interest Rate Swap [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Derivatives, Fair Value [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (Loss) on Discontinuation of Interest Rate Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net

$4,600,000

'

'

'

'

'

'

'

'

'

$0

'

'

'

'

'

'

'

'

'

Commodity cash flow hedge gain to be reclassified within 21 months

'

'

'

'

'

'

'

'

'

'

'

2,700,000

'

'

'

'

'

'

'

'

Derivative, Notional Amount

'

'

'

'

'

'

'

'

400,000,000

500,000,000

'

'

'

'

'

'

'

'

'

'

Assets

42,430,000

62,995,000

42,399,000

62,036,000

31,000

959,000

38,384,000

54,503,000

'

'

'

'

'

'

714,000

6,469,000

3,301,000

1,064,000

31,000

959,000

Derivative Liability, Fair Value, Gross Asset

-11,297,000

-8,570,000

-11,297,000

-8,570,000

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Liability, Fair Value, Gross Liability

'

'

'

'

'

'

-4,574,000

0

'

'

'

'

'

'

-5,222,000

-5,107,000

-1,501,000

-3,463,000

0

0

Notional Amount Of Cash Flow Hedge Instruments Greater Than 12 Months

'

'

'

'

'

'

'

'

'

'

'

'

'

400,000,000

'

'

'

'

'

'

Commodity cash flow hedge loss to be reclassified within 12 months

'

'

'

'

'

'

'

'

'

'

'

3,600,000

'

'

'

'

'

'

'

'

Commodity Cash Flow Hedge Gain Loss To Be Reclassified After Next 12 Months Net

'

'

'

'

'

'

'

'

'

'

'

900,000

'

'

'

'

'

'

'

'

Amount of accumulated other comprehensive income (loss) attributable primarily to settled interest-rate swaps.

'

'

'

'

'

'

'

'

'

'

'

'

-42,600,000

'

'

'

'

'

'

'

Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net

'

'

'

'

'

'

'

'

'

'

'

'

($4,800,000)

'

'

'

'

'

'

'

RISK_MANAGEMENT_AND_HEDGING_AC4

RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES Part 2 (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	MMcf	MMcf
Cash Flow Hedging [Member] | Fixed Price [Member] | Sold [Member] | Natural Gas [Member] | Swap [Member]	'	'
Derivative [Line Items]	'	'
Derivative nonmonetary notional amount	-41.6	-48.1
Cash Flow Hedging [Member] | Fixed Price [Member] | Sold [Member] | Crude oil and NGLs [Member] | Forwards and Swaps Contracts [Member]	'	'
Derivative [Line Items]	'	'
Derivative nonmonetary notional amount	-3.7	-4
Cash Flow Hedging [Member] | Fixed Price [Member] | Purchased [Member] | Natural Gas [Member] | Swap [Member]	'	'
Derivative [Line Items]	'	'
Derivative nonmonetary notional amount	0	0
Cash Flow Hedging [Member] | Fixed Price [Member] | Purchased [Member] | Crude oil and NGLs [Member] | Forwards and Swaps Contracts [Member]	'	'
Derivative [Line Items]	'	'
Derivative nonmonetary notional amount	0	0
Cash Flow Hedging [Member] | Basis [Member] | Sold [Member] | Natural Gas [Member] | Swap [Member]	'	'
Derivative [Line Items]	'	'
Derivative nonmonetary notional amount	-41.6	-48.1
Cash Flow Hedging [Member] | Basis [Member] | Purchased [Member] | Natural Gas [Member] | Swap [Member]	'	'
Derivative [Line Items]	'	'
Derivative nonmonetary notional amount	0	0
Cash Flow Hedging [Member] | Interest Rate Forward Starting Swaps [Member] | Sold [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Notional Amount	0	0
Cash Flow Hedging [Member] | Interest Rate Forward Starting Swaps [Member] | Purchased [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Notional Amount	900	400
Interest Rate Contract [Member] | Other Assets [Member] | Designated as Hedging Instrument [Member]	'	'
Derivative [Line Items]	'	'
Derivative, Notional Amount	400	'

RISK_MANAGEMENT_AND_HEDGING_AC5

RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES Part 3 (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net	$4,600,000	'
Gain (Loss) on Discontinuation of Interest Rate Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Tax	3,100,000	'
Total unrealized gain (loss) recognized in other comprehensive income (loss) on derivatives (effective portion)	-15,508,000	'
Cash Flow Hedging [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net	'	0
Total gain (loss) reclassified from accumulated other comprehensive income (loss) into net income on derivatives (effective portion)	-37,740,000	-871,000
Total unrealized gain (loss) recognized in other comprehensive income (loss) on derivatives (effective portion)	-56,455,000	-12,980,000
Commodity Contract [Member] | Cash Flow Hedging [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Commodity cash flow hedge gain to be reclassified within 21 months	2,700,000	'
Total unrealized gain (loss) recognized in other comprehensive income (loss) on derivatives (effective portion)	-35,762,000	-19,768,000
Commodity cash flow hedge loss to be reclassified within 12 months	3,600,000	'
Commodity Cash Flow Hedge Gain Loss To Be Reclassified After Next 12 Months Net	900,000	'
Commodity Contract [Member] | Revenues [Member] | Cash Flow Hedging [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Total gain (loss) reclassified from accumulated other comprehensive income (loss) into net income on derivatives (effective portion)	-26,419,000	2,566,000
Interest Rate Contract [Member] | Cash Flow Hedging [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Total unrealized gain (loss) recognized in other comprehensive income (loss) on derivatives (effective portion)	-20,693,000	6,788,000
Amount of accumulated other comprehensive income (loss) attributable primarily to settled interest-rate swaps.	42,600,000	'
Amount of loss to be recognized in the next 12 months	-4,800,000	'
Interest Rate Contract [Member] | Interest Expense [Member] | Cash Flow Hedging [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Total gain (loss) reclassified from accumulated other comprehensive income (loss) into net income on derivatives (effective portion)	($11,321,000)	($3,437,000)

RISK_MANAGEMENT_AND_HEDGING_AC6

RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES Part 4 (Details) (USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Derivative Credit Exposure [Line Items]	'
Derivative, Net Liability Position, Aggregate Fair Value	$0

CREDIT_FACILITIES_AND_SHORTTER1

CREDIT FACILITIES AND SHORT-TERM NOTES PAYABLE (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Jan. 31, 2014
Line of Credit Facility [Line Items]	'	'
Letters of credit issued	$2,200,000	'
Remaining available borrowing capacity to meet liquidity needs	297,800,000	'
Maximum borrowing capacity	1,700,000,000	'
Write off of Deferred Debt Issuance Cost	2,900,000	'
ONEOK Credit Agreement [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Line Of Credit Facility Option To Increase Borrowing Capacity	500,000,000	'
Interest rate description	'borrowings, if any, will accrue at LIBOR plus 125 basis points	'
Annual fee descripton	'the annual facility fee is 25 basis points	'
Indebtedness To Adjusted EBITDA Maximum	4	'
Indebtedness To Adjusted EBITDA Current	1.5	'
Partnership Credit Agreement sublimit for issuance of standby letters of credit	50,000,000	'
line of credit facility swingline subfacility	50,000,000	'
Maximum borrowing capacity	300,000,000	1,200,000,000
Partnership Credit Agreement [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Line Of Credit Facility Option To Increase Borrowing Capacity	2,400,000,000	'
Commercial paper	125,000,000	'
Letters of credit issued	14,000,000	'
Total short-term borrowings authorized by our general partner's Board of Directors	2,500,000,000	'
Interest rate description	'borrowings, if any, will accrue at LIBOR plus 117.5 basis points	'
Annual fee descripton	'the annual facility fee is 20 basis points	'
Indebtedness To Adjusted EBITDA Maximum	5	'
Acquisition price threshold for increase in permitted debt to EBITDA covenant ratio	25,000,000	'
Indebtedness To Adjusted EBITDA From Acquisitions Maximum	5.5	'
Indebtedness To Adjusted EBITDA Current	3.7	'
Partnership Credit Agreement sublimit for issuance of standby letters of credit	100,000,000	'
line of credit facility swingline subfacility	150,000,000	'
Short-term Bank Loans and Notes Payable	$0	'

LONGTERM_DEBT_Details

LONG-TERM DEBT (Details) (USD $)	3 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2014	Jan. 31, 2014	Jan. 31, 2014	Jan. 31, 2014	Jan. 31, 2014
			Note Payable from Public Offering Due 2022 [Member]	note payable due 2015 [Member]	ONE Gas [Member]	ONE Gas [Member]	ONE Gas [Member]	ONE Gas [Member]
			Rate	Rate		Notes Payable due 2019 [Member]	Notes Payable due 2024 [Member]	Notes Payable due 2044 [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'
Long-term Debt	$7,200,000,000	$7,800,000,000	'	'	$1,200,000,000	$300,000,000	$300,000,000	$600,000,000
Related Party Transaction, Amounts of Transaction	1,130,000,000	'	'	'	'	'	'	'
Extinguishment of Debt, Amount	'	'	152,500,000	400,000,000	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	'	'	4.25%	5.20%	'	'	'	'
Early Repayment of Senior Debt	'	'	150,000,000	430,100,000	'	'	'	'
Gains (Losses) on Extinguishment of Debt	$24,800,000	'	'	'	'	'	'	'

EQUITY_Details

EQUITY (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Common Stock, Dividends, Per Share, Cash Paid	$0.40	$0.36
Stockholders' equity, beginning balance	$4,845,180	$4,232,450
Net income	206,511	165,705
Other comprehensive income (loss)	-8,624	-13,881
Common stock issued	7,579	2,831
Common stock dividends	-83,275	-73,781
Issuance of common units of ONEOK Partners	52,842	14,572
Distribution of ONE Gas to shareholders	-1,747,424	0
Distributions to noncontrolling interests	-101,655	-90,336
Other	-43,427	-33,427
Stockholders' equity, ending balance	3,127,707	4,204,133
Dividends declared per share of common stock	$0.56	'
Dividends Payable, Date of Record	30-Apr-14	'
Dividends Payable, Date to be Paid	15-May-14	'
ONEOK Shareholders' Equity [Member]	'	'
Stockholders' equity, beginning balance	2,337,851	2,129,609
Net income	93,515	112,521
Other comprehensive income (loss)	8,685	-6,355
Common stock issued	7,579	2,831
Common stock dividends	-83,275	-73,781
Issuance of common units of ONEOK Partners	10,996	2,956
Distribution of ONE Gas to shareholders	-1,747,424	0
Distributions to noncontrolling interests	0	0
Other	-43,427	-33,427
Stockholders' equity, ending balance	584,500	2,134,354
Noncontrolling Interests in Consolidated Subsidiaries [Member]	'	'
Stockholders' equity, beginning balance	2,507,329	2,102,841
Net income	112,996	53,184
Other comprehensive income (loss)	-17,309	-7,526
Common stock issued	0	0
Common stock dividends	0	0
Issuance of common units of ONEOK Partners	41,846	11,616
Distribution of ONE Gas to shareholders	0	0
Distributions to noncontrolling interests	-101,655	-90,336
Other	0	0
Stockholders' equity, ending balance	$2,543,207	$2,069,779

ACCUMULATED_OTHER_COMPREHENSIV2

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Part 1 (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Balance of Accumulated Other Comprehensive Income (Loss) [Abstract]	'	'	'
Unrealized Gains (Losses) on Energy Marketing and Risk Management Assets/Liabilities	($38,258)	'	($43,168)
Unrealized Holding Gains (Losses) on Investment Securities	781	'	857
Pension and Postretirement Benefit Plan Obligations	-72,436	'	-79,676
Accumulated Other Comprehensive Income (Loss)	-109,913	'	-121,987
Other comprehensive income (loss) attributable to ONEOK [Abstract]	'	'	'
Unrealized Gains (Losses) on Energy Marketing and Risk Management Assets/Liabilities	4,910	'	'
Unrealized Gains (Losses) on Energy Marketing and Risk Management Assets/Liabilities	-15,508	'	'
Unrealized Holding Gains (Losses) on Investment Securities	-76	'	'
Unrealized Holding Gains (Losses) on Investment Securities	0	'	'
Unrealized Holding Gains (Losses) on Investment Securities	-76	-62	'
Pension and Postretirement Benefit Plan Obligations	45	'	'
Pension and Postretirement Benefit Plan Obligations	3,851	-7,462	'
Accumulated Other Comprehensive Income (Loss)	-15,539	'	'
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	-37,527	-7,295	'
Accumulated Other Comprehensive Income (Loss)	24,224	18,701	'
Accumulated Other Comprehensive Income (Loss)	8,685	'	'
Transfer to ONE Gas [Abstract]	'	'	'
Unrealized gains (losses) on energy marketing and risk-management assets/liabilities	0	'	'
Unrealized holding gains (losses) on investment securities	0	'	'
Pension and postretirement benefit plan obligations	3,389	'	'
Accumulated other comprehensive income (loss)	$3,389	'	'

ACCUMULATED_OTHER_COMPREHENSIV3

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Part 2 (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Total reclassifications for the period attributable to ONEOK	$24,224	$18,701
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income tax expense	-13,017	-4,695
Income net of tax	37,527	7,295
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income net of tax	20,418	7,443
Accumulated Defined Benefit Plans Adjustment [Member]	'	'
Pension and postretirement benefit plan obligations [Abstract]	'	'
Amortization of net loss	3,963	5,078
Amortization of unrecognized prior service cost	-367	-113
Amortization of unrecognized net asset at adoption	0	7
Income before income taxes	3,596	4,972
Income tax expense	-1,438	-1,923
Income net of tax	3,806	11,258
Sales [Member] | Commodity Contract [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Commodity sales revenues	26,419	-2,566
Interest Expense [Member] | Interest Rate Contract [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Interest expense	11,321	3,437
Total before tax [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income before income taxes	37,740	871
Tax benefit [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income tax expense	-7,896	-394
Income from continuing operations | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income net of tax	29,844	477
Income from continuing operations | Accumulated Defined Benefit Plans Adjustment [Member]	'	'
Pension and postretirement benefit plan obligations [Abstract]	'	'
Income net of tax	2,158	3,049
Income from discontinued operations | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income net of tax	7,683	6,818
Income from discontinued operations | Accumulated Defined Benefit Plans Adjustment [Member]	'	'
Pension and postretirement benefit plan obligations [Abstract]	'	'
Income net of tax	1,648	8,209
Net income | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income net of tax	37,527	7,295
Net income attributable to noncontrolling interest [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Net income attributable to noncontrolling interest	17,109	-148
Cash Flow Hedging [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income before income taxes	37,740	871
Cash Flow Hedging [Member] | Sales [Member] | Commodity Contract [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income before income taxes	26,419	-2,566
Cash Flow Hedging [Member] | Interest Expense [Member] | Interest Rate Contract [Member]	'	'
Unrealized (gains) losses on derivatives [Abstract]	'	'
Income before income taxes	$11,321	$3,437

EARNINGS_PER_SHARE_Details

EARNINGS PER SHARE (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Basic EPS from continuing operations [Abstract]	'	'
Income from continuing operations attributable to ONEOK available for common stock	$91,741	$57,319
Weighted Average number of share, basic (in shares)	209,130	205,479
Per share amount, basic (in dollars per shares)	$0.44	$0.28
Diluted EPS from continuing operations [Abstract]	'	'
Effect of dilutive securities	0	0
Effect of dilutive securities, number of shares (in shares)	1,036	3,979
Income from continuing operations attributable to ONEOK available for common stock and common stock equivalents	$91,741	$57,319
Weighted Average number of share, diluted (in shares)	210,166	209,458
Per Share amount, diluted (in dollars per share)	$0.44	$0.27
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0

EMPLOYEE_BENEFIT_PLANS_Details

EMPLOYEE BENEFIT PLANS (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Pension Benefits [Member]	'	'
Components of net periodic benefit cost	'	'
Service cost	$1,822	$1,532
Interest cost	4,628	3,906
Expected return on assets	-4,935	-4,969
Amortization of unrecognized prior service cost	48	58
Amortization of net loss	3,755	4,755
Net periodic benefit cost	5,318	5,282
Postretirement Benefits [Member]	'	'
Components of net periodic benefit cost	'	'
Service cost	179	118
Interest cost	611	298
Expected return on assets	-555	-314
Amortization of unrecognized net asset at adoption	0	7
Amortization of unrecognized prior service cost	-415	-171
Amortization of net loss	208	323
Net periodic benefit cost	$28	$261

UNCONSOLIDATED_AFFILIATES_Deta

UNCONSOLIDATED AFFILIATES (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]	'	'	'
Equity earnings from investments	$33,659,000	$25,855,000	'
Ownership in Bighorn Gas Gathering, LLC	49.00%	'	'
Investments in unconsolidated affiliates	1,229,054,000	1,220,129,000	1,229,838,000
Income Statement	'	'	'
Operating revenues	155,279,000	127,801,000	'
Operating expenses	71,679,000	64,271,000	'
Net income	78,673,000	58,204,000	'
Distributions paid to ONEOK Partners	35,070,000	30,193,000	'
Northern Border Pipeline [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Equity earnings from investments	23,409,000	16,390,000	'
Overland Pass Pipeline Company [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Equity earnings from investments	4,731,000	2,899,000	'
Fort Union Gas Gathering, L.L.C. [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Equity earnings from investments	4,129,000	3,869,000	'
Bighorn Gas Gathering L.L.C. [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Equity earnings from investments	-400,000	712,000	'
Investments in unconsolidated affiliates	86,600,000	'	'
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	53,400,000	'	'
Other Unconsolidated Affiliate [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Equity earnings from investments	1,790,000	1,985,000	'
Unconsolidated Affiliates [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Related Party Transaction, Expenses from Transactions with Related Party	$14,200,000	$7,800,000	'

ONEOK_PARTNERS_Details

ONEOK PARTNERS (Details) (USD $)	3 Months Ended		12 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Related Party Transaction [Line Items]	'	'	'
Distribution Made to Limited Partner, Distribution Date	15-May-14	'	'
Payments to Acquire Businesses, Net of Cash Acquired	$14,000,000	$0	'
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	41.00%	'	41.20%
Proceeds from Sale of Interest in Partnership Unit	56,500,000	16,500,000	'
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	52,842,000	14,572,000	'
Aggregate amount of common units available for issuance and sale under Equity Distribution Agreement	300,000,000	'	'
Maximum borrowing capacity	1,700,000,000	'	'
Common units	19.8	'	'
Class B units	73	'	'
Distribution Made To Member Or Limited Parter Change From Prior Quarter	0.015	'	'
Expenses	'	'	'
Distribution Made to Limited Partner, Date of Record	30-Apr-14	'	'
Remaining amount of common units available for issuance and sale under the Equity Distribution Agreement	207,300,000	'	'
Partners capital account units sold under equity distribution agreement	1.1	0.3	'
ONEOK [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Revenue	53,526,000	82,634,000	'
Expenses	'	'	'
Cost of sales and fuel	10,835,000	9,551,000	'
Administrative and general expenses	77,246,000	72,496,000	'
Total expenses	88,081,000	82,047,000	'
General Partner [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Ownership interest (in hundreths)	2.00%	'	'
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	2.00%	'	'
Limited Partner [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Ownership interest (in hundreths)	39.00%	'	'
Distribution Paid [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Distribution per unit	$0.73	$0.71	'
Distributions to general partner	73,104,000	64,855,000	'
Limited partner distributions to ONEOK	67,737,000	65,880,000	'
Total distributions	242,496,000	220,924,000	'
Distribution Paid [Member] | General Partner [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
General partner distributions	4,849,000	4,418,000	'
Incentive distributions	68,255,000	60,437,000	'
Distribution Paid [Member] | Limited Partner [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Limited partner distributions to noncontrolling interest	101,655,000	90,189,000	'
Distribution Declared [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Distribution per unit	$0.75	$0.72	'
Distribution Made To Member Or Limited Parter Annualized Quarterly Distribution	2.98	'	'
Distributions to general partner	76,922,000	66,045,000	'
Total distributions	250,555,000	223,428,000	'
Distribution Declared [Member] | General Partner [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
General partner distributions	5,011,000	4,469,000	'
Incentive distributions	71,911,000	61,576,000	'
Distribution Declared [Member] | Limited Partner [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Limited partner distributions to ONEOK	69,127,000	66,344,000	'
Limited partner distributions to noncontrolling interest	104,506,000	91,039,000	'
Paid-in Capital [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	11,000,000	'	'
Distribution Regulated Segment [Member] | ONEOK Partners [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Related Party Transaction, Other Revenues from Transactions with Related Party	7,500,000	13,800,000	'
Energy Services [Member] | ONEOK Partners [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Related Party Transaction, Other Revenues from Transactions with Related Party	$46,000,000	$68,800,000	'

SEGMENTS_Details

SEGMENTS (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]	'	'	'
Segment Reporting, Disclosure of Major Customers	'ONEOK Partners had no single customer from which it received 10 percent or more of consolidated revenues	'we had no single external customer from which we received 10 percent or more of our consolidated gross revenues	'
Total revenues	$3,163,296	$2,517,955	'
Net margin	510,627	371,107	'
Operating costs	149,111	141,135	'
Depreciation and amortization	67,414	55,283	'
Gain (loss) on sale of assets	15	41	'
Operating income	294,117	174,730	'
Equity earnings from investments	33,659	25,855	'
Investments in unconsolidated affiliates	1,229,054	1,220,129	1,229,838
Total assets	13,653,134	15,446,219	17,741,481
Noncontrolling interests in consolidated subsidiaries	2,543,207	2,069,779	2,507,329
Capital expenditures	429,525	501,065	'
Natural Gas Gathering And Processing [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	762,125	437,514	'
Net margin	153,554	109,285	'
Operating costs	64,824	51,688	'
Depreciation and amortization	28,842	23,904	'
Gain (loss) on sale of assets	-19	28	'
Operating income	59,869	33,721	'
Equity earnings from investments	5,486	6,331	'
Investments in unconsolidated affiliates	333,054	335,140	'
Total assets	4,048,332	3,146,236	'
Noncontrolling interests in consolidated subsidiaries	4,597	4,691	'
Capital expenditures	122,891	163,948	'
Natural Gas Liquids [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	2,711,812	2,264,668	'
Net margin	268,978	186,620	'
Operating costs	65,102	59,802	'
Depreciation and amortization	27,078	19,738	'
Gain (loss) on sale of assets	-48	9	'
Operating income	176,750	107,089	'
Equity earnings from investments	4,764	3,135	'
Investments in unconsolidated affiliates	489,120	496,800	'
Total assets	6,861,829	5,647,351	'
Noncontrolling interests in consolidated subsidiaries	0	0	'
Capital expenditures	273,063	274,165	'
Natural Gas Liquids [Member] | Natural Gas Liquids for Regulated Segment [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	135,800	108,200	'
Net margin	84,700	61,500	'
Operating income	45,100	31,300	'
Natural Gas Pipelines [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	104,793	86,029	'
Net margin	93,489	74,072	'
Operating costs	27,462	27,166	'
Depreciation and amortization	10,815	11,036	'
Gain (loss) on sale of assets	-83	4	'
Operating income	55,129	35,874	'
Equity earnings from investments	23,409	16,389	'
Investments in unconsolidated affiliates	406,880	388,189	'
Total assets	1,848,594	1,799,121	'
Noncontrolling interests in consolidated subsidiaries	0	0	'
Capital expenditures	6,627	5,342	'
Natural Gas Pipelines [Member] | Natural Gas Pipelines for Regulated Segment [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	81,300	68,400	'
Net margin	68,600	57,700	'
Operating income	35,100	23,800	'
Corporate Elimination [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	-415,434	-270,256	'
Net margin	-5,394	1,130	'
Operating costs	-8,277	2,479	'
Depreciation and amortization	679	605	'
Gain (loss) on sale of assets	165	0	'
Operating income	2,369	-1,954	'
Equity earnings from investments	0	0	'
Investments in unconsolidated affiliates	0	0	'
Total assets	894,379	4,853,511	'
Noncontrolling interests in consolidated subsidiaries	2,538,610	2,065,088	'
Capital expenditures	26,944	57,610	'
Discontinued Operations [Member] | Corporate Elimination [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total assets	179,600	3,800,000	'
Capital expenditures	23,900	53,800	'
Sales to unaffiliated customers	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	3,109,770	2,435,321	'
Sales to unaffiliated customers | Natural Gas Gathering And Processing [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	347,016	137,245	'
Sales to unaffiliated customers | Natural Gas Liquids [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	2,670,655	2,238,243	'
Sales to unaffiliated customers | Natural Gas Pipelines [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	91,106	59,325	'
Sales to unaffiliated customers | Corporate Elimination [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	993	508	'
Sales to affiliated customers	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	53,526	82,634	'
Sales to affiliated customers | Natural Gas Gathering And Processing [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	41,214	55,658	'
Sales to affiliated customers | Natural Gas Liquids [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	0	0	'
Sales to affiliated customers | Natural Gas Pipelines [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	12,312	26,976	'
Sales to affiliated customers | Corporate Elimination [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	0	0	'
Intersegment revenues	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	0	0	'
Intersegment revenues | Natural Gas Gathering And Processing [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	373,895	244,611	'
Intersegment revenues | Natural Gas Liquids [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	41,157	26,425	'
Intersegment revenues | Natural Gas Liquids [Member] | Natural Gas Liquids for Regulated Segment [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	111,600	84,600	'
Intersegment revenues | Natural Gas Pipelines [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	1,375	-272	'
Intersegment revenues | Corporate Elimination [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Total revenues	($416,427)	($270,764)	'