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REGULATORY ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2023 | Nov. 18, 2022 | Aug. 25, 2022 | Feb. 28, 2021
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | $ 75,308 | $ 275,572 |  |  |  |  |
Regulatory Assets, Noncurrent | 287,906 | 330,831 |  |  |  |  |
Regulatory Assets | 363,214 | 606,403 |  |  |  |  |
Regulatory Liability, Current | (66,901) | (47,867) |  |  |  |  |
Regulatory Liability, Noncurrent | (500,478) | (529,441) |  |  |  |  |
Regulatory Liabilities | (567,379) | (577,308) |  |  |  |  |
Net regulatory assets (liabilities), current | 8,407 | 227,705 |  |  |  |  |
Net regulatory assets (liabilities), noncurrent | (212,572) | (198,610) |  |  |  |  |
Net Regulatory Assets | (204,165) | 29,095 |  |  |  |  |
February 2021 Natural Gas Purchases |  |  |  |  |  |  | $ 2,100,000
TGS Proceeds from Securitization Bonds |  |  |  | $ 197,000 |  |  |
Amortization of Rate Deferral | 14,700 | 9,400 | $ 5,500 |  |  |  |
ONGProceedsFromSecuritizationBonds |  | 1,300,000 |  |  |  |  |
ODFASecuritizationBondIssuance |  |  |  |  |  | $ 1,400,000 |
5.486% KGSS-I Securitized Utility Tariff Bonds Due 2032 |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 336,000 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 5.486% |  |
West Texas Service Area |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
TGS Deferred Extraordinary Costs from 2021 Winter Storm Uri | 26,600 |  |  |  |  |  |
Pension and postretirement benefit costs [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Liability, Current |  | (8,228) |  |  |  |  |
Regulatory Liability, Noncurrent |  | 0 |  |  |  |  |
Regulatory Liabilities |  | (8,228) |  |  |  |  |
Income tax rate changes [Member] [Domain] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Liability, Current | 0 | 0 |  |  |  |  |
Regulatory Liability, Noncurrent | (500,478) | (529,441) |  |  |  |  |
Regulatory Liabilities | (500,478) | (529,441) |  |  |  |  |
Over-recovered purchased-gas costs [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Liability, Current | (66,901) | (39,639) |  |  |  |  |
Regulatory Liability, Noncurrent | 0 | 0 |  |  |  |  |
Regulatory Liabilities | (66,901) | (39,639) |  |  |  |  |
Winter weather event costs |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 22,633 | 221,926 |  |  |  |  |
Regulatory Assets, Noncurrent | 21,495 | 36,291 |  |  |  |  |
Regulatory Assets | 44,128 | 258,217 |  |  |  |  |
Under-recovered purchased-gas costs [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 10,391 | 19,755 |  |  |  |  |
Regulatory Assets, Noncurrent | 0 | 0 |  |  |  |  |
Regulatory Assets | 10,391 | 19,755 |  |  |  |  |
Pension and postretirement benefit costs [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 6,379 | 0 |  |  |  |  |
Regulatory Assets, Noncurrent | 228,092 | 258,257 |  |  |  |  |
Regulatory Assets | 234,471 | 258,257 |  |  |  |  |
Reacquired debt costs [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 723 | 812 |  |  |  |  |
Regulatory Assets, Noncurrent | 2,712 | 3,347 |  |  |  |  |
Regulatory Assets | 3,435 | 4,159 |  |  |  |  |
MGP Costs [Member] [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 98 | 98 |  |  |  |  |
Regulatory Assets, Noncurrent | 31,893 | 29,743 |  |  |  |  |
Regulatory Assets | 31,991 | 29,841 |  |  |  |  |
Ad valorem tax [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 14,533 | 13,359 |  |  |  |  |
Regulatory Assets, Noncurrent | 0 | 0 |  |  |  |  |
Regulatory Assets | 14,533 | 13,359 |  |  |  |  |
Weather normalization [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 11,404 | 8,474 |  |  |  |  |
Regulatory Assets, Noncurrent | 0 | 0 |  |  |  |  |
Regulatory Assets | 11,404 | 8,474 |  |  |  |  |
Customer credit deferrals |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 6,184 | 9,504 |  |  |  |  |
Regulatory Assets, Noncurrent | 0 | 0 |  |  |  |  |
Regulatory Assets | 6,184 | 9,504 |  |  |  |  |
Other regulatory assets [Member] |  |  |  |  |  |  |
SCHEDULE OF REGULATED ASSETS AND LIABILITIES [Line Items] |  |  |  |  |  |  |
Regulatory Assets, Current | 2,963 | 1,644 |  |  |  |  |
Regulatory Assets, Noncurrent | 3,714 | 3,193 |  |  |  |  |
Regulatory Assets | $ 6,677 | $ 4,837 |  |  |  |  |

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- Definition [Line Items] for Tabular disclosure of assets and liabilities that result from rate actions of a regulator. Regulatory assets are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 + Details
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