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Balance Sheet (Unaudited) - Transco - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Assets, Current [Abstract] |  |
Cash and cash equivalents | $ 70 | $ 60
Inventory, Net | 339 | 279
Other current assets and deferred charges | 225 | 192
Current assets | 2,271 | 2,661
Property, Plant and Equipment, Gross | 60,305 | 57,395
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | (19,920) | (18,703)
Property, Plant and Equipment, Net | 40,385 | 38,692
Other Assets, Noncurrent | 1,888 | 1,830
Total assets | 55,736 | 54,532
Liabilities, Current [Abstract] |  |
Accounts payable | 1,406 | 1,613
Other current liabilities | 1,472 | 1,360
Total current liabilities | 5,377 | 5,312
Contingent liabilities and commitments |  |
Members' Equity [Abstract] |  |
Retained Earnings (Accumulated Deficit) | (12,354) | (12,396)
Total liabilities and equity | 55,736 | 54,532
Transcontinental Gas Pipe Line Company, LLC [Member] |  |
Assets, Current [Abstract] |  |
Cash and cash equivalents | 0 | 0
Accounts and Other Receivables, Net, Current | 18 | 12
Inventory, Net | 87 | 81
Regulatory Assets, Current | 121 | 74
Other current assets and deferred charges | 19 | 24
Current assets | 1,022 | 1,103
Property, Plant and Equipment, Gross | 20,650 | 20,044
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | (6,299) | (5,941)
Property, Plant and Equipment, Net | 14,351 | 14,103
Regulatory Assets, Noncurrent | 269 | 320
Other Assets, Noncurrent | 478 | 405
Total assets | 16,120 | 15,931
Liabilities, Current [Abstract] |  |
Accounts Payable, Trade, Current | 224 | 258
Regulatory Liability, Current | 80 | 58
Interest Payable, Current | 50 | 76
Accrual for Taxes Other than Income Taxes, Current | 61 | 27
Customer Refund Liability, Current | 123 | 0
Other current liabilities | 93 | 78
Asset Retirement Obligation, Current | 42 | 22
Long-Term Debt, Current Maturities | 1,044 | 35
Total current liabilities | 1,765 | 609
Long-Term Debt, Excluding Current Maturities | 4,170 | 5,200
Regulatory Liabilities, Noncurrent | 920 | 976
Asset Retirement Obligations, Noncurrent | 568 | 593
Other Liabilities, Noncurrent | 254 | 248
Contingent liabilities and commitments |  |
Members' Equity [Abstract] |  |
Members' Capital | 5,088 | 5,088
Retained Earnings (Accumulated Deficit) | 3,355 | 3,217
Total Members' Equity | 8,443 | 8,305
Total liabilities and equity | 16,120 | 15,931
Transcontinental Gas Pipe Line Company, LLC [Member] | Related Party |  |
Assets, Current [Abstract] |  |
Accounts and Financing Receivable, after Allowance for Credit Loss, Current | 498 | 638
Accounts Receivable, after Allowance for Credit Loss, Current | 7 | 24
Liabilities, Current [Abstract] |  |
Accounts payable | 48 | 55
Transcontinental Gas Pipe Line Company, LLC [Member] | Nonrelated Party |  |
Assets, Current [Abstract] |  |
Accounts Receivable, after Allowance for Credit Loss, Current | $ 272 | $ 250

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