Document and Entity Information
Document and Entity Information - shares | 9 Months Ended | |
Sep. 30, 2022 | Oct. 31, 2022 | |
Document and Entity Information [Abstract] | ||
Document Type | 10-Q | |
Document Quarterly Report | true | |
Document period end date | Sep. 30, 2022 | |
Document Transition Report | false | |
Entity File Number | 1-7414 | |
Entity registrant name | Northwest Pipeline LLC | |
Entity Incorporation, State or Country Code | DE | |
Entity Tax Identification Number | 26-1157701 | |
Entity Address, Address Line One | One Williams Center | |
Entity Address, City or Town | Tulsa | |
Entity Address, State or Province | OK | |
Entity Address, Postal Zip Code | 74172-0172 | |
City Area Code | 800 | |
Local Phone Number | 945-5426 | |
Entity Current Reporting Status | Yes | |
Entity Interactive Data Current | Yes | |
Entity filer category | Non-accelerated Filer | |
Entity Small Business | false | |
Entity Emerging Growth Company | false | |
Entity Shell Company | false | |
Entity central index key | 0000110019 | |
Amendment flag | false | |
Document fiscal year focus | 2022 | |
Document fiscal period focus | Q3 | |
Current fiscal year end date | --12-31 | |
Entity common stock, shares outstanding | 0 |
Statement of Net Income (Unaudi
Statement of Net Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | ||
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | |
Operating Revenues: | ||||
Revenues | $ 109,758 | $ 108,610 | $ 331,435 | $ 329,426 |
Operating Expenses: | ||||
General and administrative | 13,448 | 12,161 | 38,237 | 35,291 |
Operation and maintenance | 23,143 | 19,462 | 63,629 | 55,641 |
Depreciation and amortization | 28,510 | 28,398 | 85,659 | 84,666 |
Regulatory debits | 366 | 369 | 1,184 | 1,067 |
Taxes — other than income taxes | 4,022 | 4,099 | 12,452 | 12,596 |
Regulatory charges resulting from tax rate changes | 5,944 | 5,944 | 17,637 | 17,637 |
Other (income) loss, net | 455 | 120 | 360 | 74 |
Total operating expenses | 75,888 | 70,553 | 219,158 | 206,972 |
Operating Income | 33,870 | 38,057 | 112,277 | 122,454 |
Other (Income) and Other Expenses: | ||||
Interest expense | 7,853 | 7,561 | 23,172 | 22,402 |
Allowance for equity and borrowed funds used during construction (AFUDC) | (885) | (543) | (2,354) | (1,182) |
Miscellaneous other (income) loss, net | (1,914) | 5 | (3,515) | (340) |
Total other (income) and other expenses | 5,054 | 7,023 | 17,303 | 20,880 |
Net Income | 28,816 | 31,034 | 94,974 | 101,574 |
Natural gas transportation | ||||
Operating Revenues: | ||||
Revenues | 105,193 | 105,099 | 319,113 | 318,427 |
Natural gas storage | ||||
Operating Revenues: | ||||
Revenues | 3,294 | 3,144 | 9,701 | 9,777 |
Other | ||||
Operating Revenues: | ||||
Revenues | $ 1,271 | $ 367 | $ 2,621 | $ 1,222 |
Balance Sheet (Unaudited)
Balance Sheet (Unaudited) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021 |
Current Assets: | ||
Cash | $ 0 | $ 0 |
Receivables: | ||
Advances to affiliate | 324,796 | 281,442 |
Trade | 35,416 | 39,100 |
Affiliates | 263 | 372 |
Other | 510 | 737 |
Materials and supplies, at average cost | 8,851 | 8,909 |
Exchange gas due from others | 9,639 | 16,958 |
Prepayments and other | 8,365 | 4,308 |
Total current assets | 387,840 | 351,826 |
Property, plant and equipment | 3,810,112 | 3,753,354 |
Less-Accumulated depreciation and amortization | 1,919,281 | 1,863,921 |
Total property, plant and equipment, net | 1,890,831 | 1,889,433 |
Other Assets: | ||
Regulatory assets | 16,470 | 18,312 |
Right-of-use assets | 9,843 | 10,238 |
Deferred charges and other long-term assets | 14,036 | 11,826 |
Total other assets | 40,349 | 40,376 |
Total assets | 2,319,020 | 2,281,635 |
Payables: | ||
Trade | 36,246 | 23,108 |
Affiliates | 10,627 | 13,140 |
Accrued liabilities: | ||
Exchange gas due to others | 12,367 | 12,559 |
Customer advances | 6,807 | 2,281 |
Taxes — other than income taxes | 11,188 | 11,196 |
Interest | 12,019 | 5,505 |
Regulatory liabilities | 137,294 | 0 |
Other | 2,552 | 2,546 |
Total current liabilities | 229,100 | 70,335 |
Long-Term Debt | 579,815 | 579,030 |
Other Long-Term Liabilities: | ||
Regulatory liabilities | 275,379 | 388,433 |
Asset retirement obligations | 127,609 | 122,650 |
Lease liability | 7,960 | 8,202 |
Other | 2,780 | 3,582 |
Total other long-term liabilities | 413,728 | 522,867 |
Contingent Liabilities and Commitments (Note 4) | ||
Member’s Equity: | ||
Member’s capital | 1,073,892 | 1,073,892 |
Retained earnings | 22,485 | 35,511 |
Total member’s equity | 1,096,377 | 1,109,403 |
Total liabilities and member’s equity | $ 2,319,020 | $ 2,281,635 |
Statement of Changes in Member'
Statement of Changes in Member's Equity (Unaudited) - USD ($) $ in Thousands | Total | Member's Capital | Retained Earnings |
Balance at beginning of period at Dec. 31, 2020 | $ 1,073,892 | $ 66,503 | |
Net income | $ 101,574 | 101,574 | |
Cash distributions to parent | (133,000) | (133,000) | |
Balance at end of period at Sep. 30, 2021 | 1,108,969 | 1,073,892 | 35,077 |
Balance at beginning of period at Jun. 30, 2021 | 1,073,892 | 38,043 | |
Net income | 31,034 | 31,034 | |
Cash distributions to parent | (34,000) | ||
Balance at end of period at Sep. 30, 2021 | 1,108,969 | 1,073,892 | 35,077 |
Balance at beginning of period at Dec. 31, 2021 | 1,109,403 | 1,073,892 | 35,511 |
Net income | 94,974 | 94,974 | |
Cash distributions to parent | (108,000) | (108,000) | |
Balance at end of period at Sep. 30, 2022 | 1,096,377 | 1,073,892 | 22,485 |
Balance at beginning of period at Jun. 30, 2022 | 1,073,892 | 23,169 | |
Net income | 28,816 | 28,816 | |
Cash distributions to parent | (29,500) | ||
Balance at end of period at Sep. 30, 2022 | $ 1,096,377 | $ 1,073,892 | $ 22,485 |
Statement of Cash Flows (Unaudi
Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands | 9 Months Ended | |
Sep. 30, 2022 | Sep. 30, 2021 | |
OPERATING ACTIVITIES: | ||
Net income | $ 94,974 | $ 101,574 |
Adjustments to reconcile net cash provided (used) by operating activities: | ||
Depreciation and amortization | 85,659 | 84,666 |
Regulatory debits | 1,184 | 1,067 |
Regulatory charges resulting from tax rate changes | 17,637 | 17,637 |
Amortization of deferred charges and credits | (3,638) | (2,784) |
Allowance for equity funds used during construction (equity AFUDC) | (1,853) | (960) |
Changes in current assets and liabilities: | ||
Trade and other accounts receivable | 3,911 | 4,769 |
Affiliate receivables | 109 | (119) |
Materials and supplies | 58 | 129 |
Other current assets | (449) | (5,253) |
Trade accounts payable | (890) | (774) |
Affiliate payables | (2,513) | 11,735 |
Regulatory liabilities | 137,451 | 0 |
Other accrued liabilities | 6,675 | 13,109 |
Changes in long-term assets and liabilities: | ||
Regulatory liabilities | (133,578) | 3,179 |
Other, net | 1,674 | (2,489) |
Net cash provided (used) by operating activities | 206,411 | 225,486 |
FINANCING ACTIVITIES: | ||
Cash distributions to parent | (108,000) | (133,000) |
Net cash provided (used) by financing activities | (108,000) | (133,000) |
Property, plant and equipment: | ||
Capital expenditures | (60,637) | (51,233) |
Contributions and advances for construction costs | 10,042 | 7,146 |
Disposal of property, plant and equipment, net | (4,462) | (3,638) |
Advances to affiliate, net | (43,354) | (44,761) |
Net cash provided (used) by investing activities | (98,411) | (92,486) |
Increase (decrease) in cash | 0 | 0 |
Cash at beginning of period | 0 | 0 |
Cash at end of period | 0 | 0 |
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] | ||
Increases to property, plant and equipment, exclusive of equity AFUDC | (73,267) | (58,566) |
Changes in related accounts payable and accrued liabilities | 12,630 | 7,333 |
Capital expenditures | $ (60,637) | $ (51,233) |
Basis of Presentation (Notes)
Basis of Presentation (Notes) | 9 Months Ended |
Sep. 30, 2022 | |
Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
Basis of Presentation | Basis of Presentation In this report, Northwest Pipeline LLC (Northwest) is at times referred to in the first person as “we,” “us,” or “our.” Northwest is indirectly owned by The Williams Companies, Inc. (Williams), a publicly traded Delaware corporation. We own and operate an interstate natural gas pipeline system that is regulated by the Federal Energy Regulatory Commission (FERC). General Our accompanying interim financial statements do not include all the notes in our annual financial statements and, therefore, should be read in conjunction with our financial statements and notes thereto for the year ended December 31, 2021, in our Annual Report on Form 10-K. The accompanying unaudited financial statements include all normal recurring adjustments and others that, in the opinion of management, are necessary to present fairly our interim financial statements. The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes. Actual results could differ from those estimates. |
Revenue Recognition (Notes)
Revenue Recognition (Notes) | 9 Months Ended |
Sep. 30, 2022 | |
Revenue from Contract with Customer [Abstract] | |
Revenue Recognition | Revenue Recognition Revenue by Category Our revenue disaggregation by major service line includes Natural gas transportation , Natural gas storage , and Other, which are separately presented on the Statement of Net Income . Contract Assets The following table presents a reconciliation of our contract assets: Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (Thousands) Balance at beginning of period $ 10,198 $ 5,650 $ 7,943 $ 3,395 Revenue recognized in excess of amounts invoiced 1,146 1,146 3,401 3,401 Balance at end of period $ 11,344 $ 6,796 $ 11,344 $ 6,796 Contract Liabilities The following table presents a reconciliation of our contract liabilities: Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (Thousands) Balance at beginning of period $ 3,161 $ 4,144 $ 3,672 $ 4,610 Recognized in revenue (259) (236) (770) (702) Balance at end of period $ 2,902 $ 3,908 $ 2,902 $ 3,908 Remaining Performance Obligations Our remaining performance obligations primarily include reservation charges on contracted capacity on our firm transportation and storage contracts with customers. Amounts from certain contracts included in the table below, which are subject to periodic review and approval by the FERC, reflect the rates for such services in our current FERC tariffs for the life of the related contracts; however, these rates may change based on future rate cases or settlements approved by the FERC. This table excludes the variable consideration component for commodity charges. Certain of our contracts contain evergreen and other renewal provisions for periods beyond the initial term of the contract. The remaining performance obligations as of September 30, 2022 do not consider potential future performance obligations for which the renewal has not been exercised and exclude contracts with customers for which the underlying facilities have not received FERC authorization to be placed into service. The following table presents the amount of the contract liabilities balance expected to be recognized as revenue when performance obligations are satisfied and the transaction price allocated to the remaining performance obligations under certain contracts as of September 30, 2022. Contract Liabilities Remaining Performance Obligations (Thousands) 2022 (three months) $ 259 $ 106,754 2023 (one year) 1,120 410,948 2024 (one year) 1,218 351,973 2025 (one year) 305 334,049 2026 (one year) — 322,990 Thereafter — 2,527,006 Total $ 2,902 $ 4,053,720 Accounts Receivable Receivables from contracts with customers are included within Receivables - Trade and Receivables - Affiliates, and receivables that are not related to contracts with customers are included within the balance of Receivables - Advances to affiliate and Receivables - Other on our Balance Sheet. |
Rate and Regulatory Matters (No
Rate and Regulatory Matters (Notes) | 9 Months Ended |
Sep. 30, 2022 | |
Regulated Operations [Abstract] | |
Rate and Regulatory Matters | Rate and Regulatory Matters Rate Case Settlement Filing On August 26, 2022, we filed with FERC a Petition for Approval of Pre-Filing Stipulation and Settlement Agreement (Settlement) and were assigned Docket No. RP22-1155. The Settlement established a new general system firm Rate Schedule TF-1 (Large Customer) demand rate of $0.37250 per dekatherm with a $0.00935 commodity rate, effective January 1, 2023, resolves other rate issues, establishes a Modernization and Emission Reduction Program and satisfies our rate case filing obligation under our settlement in Docket No. RP17-346. Provisions were included in the Settlement that we can file new rates to be effective after January 1, 2026, and that a general rate case filing must be made for rates to become effective no later than April 1, 2028. As a result of this filing, we have reclassified certain long-term regulatory liabilities to current as of September 30, 2022. |
Contingent Liabilities and Comm
Contingent Liabilities and Commitments (Notes) | 9 Months Ended |
Sep. 30, 2022 | |
Commitments and Contingencies Disclosure [Abstract] | |
Contingent Liabilities and Commitments [Text Block] | Contingent Liabilities and Commitments Environmental Matters We are subject to the National Environmental Policy Act and other federal and state legislation regulating the environmental aspects of our business. Except as discussed below, our management believes that we are in substantial compliance with existing environmental requirements. Environmental expenditures are expensed or capitalized depending on their future economic benefit and potential for rate recovery. We believe that, with respect to any expenditures required to meet applicable standards and regulations, the FERC would grant the requisite rate relief so that substantially all of such expenditures would be permitted to be recovered through rates. Beginning in the mid-1980s, we evaluated many of our facilities for the presence of toxic and hazardous substances to determine to what extent, if any, remediation might be necessary. We identified polychlorinated biphenyl (PCB) contamination in air compressor systems, soils, and related properties at certain compressor station sites. Similarly, we identified hydrocarbon impacts at these facilities due to the former use of earthen pits, lubricating oil leaks or spills, and excess pipe coating released to the environment. In addition, heavy metals have been identified at these sites due to the former use of mercury containing meters and paint and welding rods containing lead, cadmium, and arsenic. The PCBs were remediated pursuant to a Consent Decree with the U.S. Environmental Protection Agency (EPA) in the late 1980s, and we conducted a voluntary clean-up of the hydrocarbon and mercury impacts in the early 1990s. In 2005, the Washington Department of Ecology required us to re-evaluate our previous clean-ups in Washington. During 2006 to 2015, 129 meter stations were evaluated, of which 82 required remediation. As of September 30, 2022, two meter stations are still being remediated. During 2006 to 2018, 14 compressor stations were evaluated, of which 11 required remediation. As of September 30, 2022, five compressor stations are still being remediated. At September 30, 2022, we had accrued liabilities totaling approximately $ 1.0 million 0.1 million Accrued liabilities - Other and $ 0.9 million Other Long-Term Liabilities - Other on the Balance Sheet. At December 31, 2021, we had accrued liabilities totaling approximately $ 1.0 million 0.1 million Accrued liabilities - Other and $ 0.9 million Other Long-Term Liabilities - Other on the Balance Sheet. We are conducting environmental assessments and implementing a variety of remedial measures that may result in increases or decreases in the total estimated costs. The EPA and various state regulatory agencies routinely propose and promulgate new rules, and issue updated guidance to existing rules. These rulemakings include, but are not limited to, rules for reciprocating internal combustion engine and combustion turbine maximum achievable control technology, review and updates to the National Ambient Air Quality Standards, and rules for new and existing source performance standards for volatile organic compounds and methane. We continuously monitor these regulatory changes and how they may impact our operations. Implementation of new or modified regulations may result in impacts to our operations and increase the cost additions to Total property, plant, and equipment, net on the Balance Sheet for both new and existing facilities in affected areas; however, due to regulatory uncertainty on final rule content and applicability timeframes, we are unable to reasonably estimate the cost of these regulatory impacts at this time. Other Matters Various other proceedings are pending against us and are considered incidental to our operations. Summary |
Debt and Financing Arrangements
Debt and Financing Arrangements (Notes) | 9 Months Ended |
Sep. 30, 2022 | |
Debt Disclosure [Abstract] | |
Debt and Financing Arrangements | Debt and Financing Arrangements Credit Facility We, along with Williams and Transcontinental Gas Pipe Line Company, LLC (Transco), are party to a credit agreement with aggregate commitments available of $3.75 billion, with up to an additional $500 million increase in aggregate commitments available under certain circumstances. We and Transco are each able to borrow up to $500 million under this credit facility to the extent not otherwise utilized by the other co-borrowers. At September 30, 2022, no letters of credit have been issued and no loans were outstanding under the credit facility. Commercial Paper Williams participates in a $3.5 billion commercial paper program, and Williams’ management considers amounts outstanding under this program to be a reduction of available capacity under the credit facility. At September 30, 2022, Williams had no outstanding commercial paper. |
Financial Instruments (Notes)
Financial Instruments (Notes) | 9 Months Ended |
Sep. 30, 2022 | |
Fair Value Disclosures [Abstract] | |
Financial Instruments | Financial Instruments Fair Value of Financial Instruments The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: Short-term financial assets : The carrying values of short-term financial assets that have variable interest rates (advances to affiliate), accounts receivable and accounts payable approximate fair value because of the short-term nature of these instruments. Long-term debt : The disclosed fair value of our long-term debt, which we consider as a level 2 measurement, is determined by a market approach using broker quoted indicative period-end bond prices. The quoted prices are based on observable transactions in less active markets for our debt or similar instruments. The carrying amount and estimated fair value of our long-term debt were $579.8 million and $553.8 million, respectively, at September 30, 2022, and $579.0 million and $646.2 million, respectively, at December 31, 2021. |
Transactions with Affiliates (N
Transactions with Affiliates (Notes) | 9 Months Ended |
Sep. 30, 2022 | |
Related Party Transactions [Abstract] | |
Transactions with Affiliates | Transactions with Affiliates We are a participant in Williams’ cash management program, and we make advances to and receive advances from Williams. At September 30, 2022 and December 31, 2021, our advances to Williams totaled approximately $324.8 million and $281.4 million, respectively. These advances are represented by demand notes and are classified as Receivables - Advances to affiliate on the Balance Sheet. Advances are stated at the historical carrying amounts. Interest expense and income are recognized when earned and the collectability is reasonably assured. The interest rate on these intercompany demand notes is based upon the daily overnight investment rate paid on Williams’ excess cash at the end of each month, which was 2.74 percent at September 30, 2022. The interest income from these advances was $1.8 million and $2.3 million for the three and nine months ended September 30, 2022, respectively, and minimal for each of the three and nine months ended September 30, 2021. Such interest income is included in Other (Income) and Other Expenses – Miscellaneous other (income) loss, net on the Statement of Net Income. Included in Operating Revenues on the Statement of Net Income are revenues received from affiliates of $0.8 million and $1.8 million for the three and nine months ended September 30, 2022, respectively, and $0.3 million and $0.9 million for the three and nine months ended September 30, 2021, respectively. The rates charged to provide services to affiliates are the same as those that are charged to similarly-situated nonaffiliated customers. We have no employees. Services necessary to operate our business are provided to us by Williams and certain affiliates of Williams. We reimburse Williams and its affiliates for all direct and indirect expenses incurred or payments made (including salary, bonus, incentive compensation and benefits) in connection with these services. Employees of Williams also provide general, administrative and management services to us, and we are charged for certain administrative expenses incurred by Williams. These charges are either directly identifiable or allocated to our assets. Direct charges are for goods and services provided by Williams at our request. Allocated charges are based on a three-factor formula, which considers revenues; property, plant, and equipment; and payroll. In management’s estimation, the allocation methodologies used are reasonable and result in a reasonable allocation to us of our costs of doing business incurred by Williams. We have recorded approximately $22.9 million and $65.1 million for the three and nine months ended September 30, 2022, respectively, and $21.5 million and $61.8 million for the three and nine months ended September 30, 2021, respectively, for these service expenses, which are primarily included in General and administrative and Operation and maintenance expenses on the Statement of Net Income. During October 2022, we declared and paid a cash distribution of $29.9 million to our parent. |
Revenue Recognition (Tables)
Revenue Recognition (Tables) | 9 Months Ended |
Sep. 30, 2022 | |
Revenue from Contract with Customer [Abstract] | |
Contract with Customer, Asset and Liability [Table Text Block] | Contract Assets The following table presents a reconciliation of our contract assets: Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (Thousands) Balance at beginning of period $ 10,198 $ 5,650 $ 7,943 $ 3,395 Revenue recognized in excess of amounts invoiced 1,146 1,146 3,401 3,401 Balance at end of period $ 11,344 $ 6,796 $ 11,344 $ 6,796 Contract Liabilities The following table presents a reconciliation of our contract liabilities: Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 (Thousands) Balance at beginning of period $ 3,161 $ 4,144 $ 3,672 $ 4,610 Recognized in revenue (259) (236) (770) (702) Balance at end of period $ 2,902 $ 3,908 $ 2,902 $ 3,908 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] | The following table presents the amount of the contract liabilities balance expected to be recognized as revenue when performance obligations are satisfied and the transaction price allocated to the remaining performance obligations under certain contracts as of September 30, 2022. Contract Liabilities Remaining Performance Obligations (Thousands) 2022 (three months) $ 259 $ 106,754 2023 (one year) 1,120 410,948 2024 (one year) 1,218 351,973 2025 (one year) 305 334,049 2026 (one year) — 322,990 Thereafter — 2,527,006 Total $ 2,902 $ 4,053,720 |
Contract Assets (Details)
Contract Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | ||
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | |
Revenue from Contract with Customer [Abstract] | ||||
Balance at beginning of period | $ 10,198 | $ 5,650 | $ 7,943 | $ 3,395 |
Revenue recognized in excess of amounts invoiced | 1,146 | 1,146 | 3,401 | 3,401 |
Balance at end of period | $ 11,344 | $ 6,796 | $ 11,344 | $ 6,796 |
Revenue Recognition Contract Li
Revenue Recognition Contract Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | ||
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | |
Contract With Customer, Liability [Line Items] | ||||
Balance at beginning of period | $ 3,161 | $ 4,144 | $ 3,672 | $ 4,610 |
Recognized in revenue | (259) | (236) | (770) | (702) |
Balance at end of period | $ 2,902 | $ 3,908 | $ 2,902 | $ 3,908 |
Contract Liabilities Performanc
Contract Liabilities Performance Obligation (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Contract with Customer, Liability | $ 2,902 | $ 3,161 | $ 3,672 | $ 3,908 | $ 4,144 | $ 4,610 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Contract with Customer, Liability | $ 259 | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | Performance Obligations Related To Contract Liabilities [Member] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 3 months | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Contract with Customer, Liability | $ 1,120 | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Performance Obligations Related To Contract Liabilities [Member] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Contract with Customer, Liability | $ 1,218 | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Performance Obligations Related To Contract Liabilities [Member] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Contract with Customer, Liability | $ 305 | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Performance Obligations Related To Contract Liabilities [Member] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Contract with Customer, Liability | $ 0 | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Performance Obligations Related To Contract Liabilities [Member] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Contract with Customer, Liability | $ 0 | |||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Performance Obligations Related To Contract Liabilities [Member] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||||||
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |
Remaining Performance Obligatio
Remaining Performance Obligation (Details) $ in Thousands | Sep. 30, 2022 USD ($) |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 4,053,720 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 106,754 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | Remaining Performance Obligations [Member] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 3 months |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 410,948 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Remaining Performance Obligations [Member] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 351,973 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Remaining Performance Obligations [Member] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 334,049 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Remaining Performance Obligations [Member] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 322,990 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Remaining Performance Obligations [Member] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Amount | $ 2,527,006 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Remaining Performance Obligations [Member] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |
Rate and Regulatory Matters (De
Rate and Regulatory Matters (Details) | Sep. 30, 2022 $ / dekatherm |
Regulated Operations [Abstract] | |
Demand Rate Pending | 0.37250 |
Commodity Rate Pending | 0.00935 |
Contingent Liabilities and Co_2
Contingent Liabilities and Commitments (Details) - Environmental assessment and remediation [Member] - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021 |
Site Contingency [Line Items] | ||
Accrued environmental assessment and remediation costs, total | $ 1 | $ 1 |
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Other, Other Liabilities, Noncurrent | Other, Other Liabilities, Noncurrent |
Accrued environmental assessment and remediation costs, current | $ 0.1 | $ 0.1 |
Environmental Loss Contingency, Current, Statement of Financial Position [Extensible Enumeration] | Other | Other |
Accrued environmental assessment and remediation costs, noncurrent | $ 0.9 | $ 0.9 |
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent |
Debt and Financing Arrangement
Debt and Financing Arrangement (Details) | Sep. 30, 2022 USD ($) |
Credit Agreement | |
Credit Facility and Commercial Paper [Line Items] | |
Credit facility capacity | $ 500,000,000 |
Williams Companies Inc | |
Credit Facility and Commercial Paper [Line Items] | |
Commercial paper outstanding | 0 |
Williams Companies Inc | Commercial paper program | |
Credit Facility and Commercial Paper [Line Items] | |
Credit facility capacity | 3,500,000,000 |
Williams Companies Inc | Credit Agreement | |
Credit Facility and Commercial Paper [Line Items] | |
Credit facility capacity | 3,750,000,000 |
Additional amount by which credit facility can be increased | 500,000,000 |
Letters of credit outstanding | 0 |
Loans outstanding | $ 0 |
Financial Instruments (Details)
Financial Instruments (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021 |
Carrying (reported) amount, fair value disclosure [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Long-term debt | $ 579.8 | $ 579 |
Estimate of fair value, fair value disclosure [Member] | Fair value, inputs, level 2 [Member] | ||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
Long-term debt | $ 553.8 | $ 646.2 |
Transactions with Affiliates (D
Transactions with Affiliates (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended | ||||
Jun. 30, 2022 | Oct. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) employee | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) employee | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) | |
Related Party Transaction [Line Items] | |||||||
Advances to affiliate | $ 324,796 | $ 324,796 | $ 281,442 | ||||
Related party transaction, rate | 2.74% | ||||||
Interest Income, Related Party | 1,800 | 2,300 | |||||
Revenue from Related Parties | $ 800 | $ 300 | $ 1,800 | $ 900 | |||
Entity number of employees | employee | 0 | 0 | |||||
Related party transaction, expenses from transactions with related party | $ 22,900 | $ 21,500 | $ 65,100 | 61,800 | |||
Cash distributions to parent | 108,000 | $ 133,000 | |||||
Williams Companies Inc | |||||||
Related Party Transaction [Line Items] | |||||||
Advances to affiliate | $ 324,800 | $ 324,800 | $ 281,400 | ||||
Subsequent Event | |||||||
Related Party Transaction [Line Items] | |||||||
Cash distributions to parent | $ 29,900 |