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Dispositions (Balance Sheet) (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | --- | ---
Current Assets Held for Sale |  |  |
Total current assets held for sale | $ 109 |  | $ 96
Noncurrent Assets Held for Sale |  |  |
Total noncurrent assets held for sale | 2,148 |  | 2,095
Current Liabilities Associated with Assets Held for Sale |  |  |
Total current liabilities associated with assets held for sale | 84 |  | 132
Noncurrent Liabilities Associated with Assets Held for Sale |  |  |
Total noncurrent liabilities associated with assets held for sale | 170 |  | 271
Piedmont |  |  |
Current Assets Held for Sale |  |  |
Total current assets held for sale | 109 |  | 92
Noncurrent Assets Held for Sale |  |  |
Total noncurrent assets held for sale | 1,864 |  | 1,722
Current Liabilities Associated with Assets Held for Sale |  |  |
Total current liabilities associated with assets held for sale | 66 |  | 52
Noncurrent Liabilities Associated with Assets Held for Sale |  |  |
Total noncurrent liabilities associated with assets held for sale | 170 |  | 182
Discontinued Operations, Held-for-sale |  |  |
Current Assets Held for Sale |  |  |
Receivables, net | 82 |  | 64
Inventory | 12 |  | 12
Other | 15 |  | 20
Total current assets held for sale | 109 |  | 96
Noncurrent Assets Held for Sale |  |  |
Cost | 2,219 |  | 2,178
Accumulated depreciation and amortization | (406) |  | (416)
Net property, plant and equipment | 1,813 |  | 1,762
Goodwill | 294 |  | 294
Regulatory assets | 41 |  | 35
Operating lease right-of-use assets, net |  |  | 4
Total noncurrent assets held for sale | 2,148 |  | 2,095
Total Assets Held for Sale | 2,257 |  | 2,191
Current Liabilities Associated with Assets Held for Sale |  |  |
Accounts payable | 76 |  | 61
Taxes accrued |  |  | 2
Current maturities of long-term debt |  |  | 43
Unrealized losses on commodity hedges |  |  | 13
Other | 8 |  | 13
Total current liabilities associated with assets held for sale | 84 |  | 132
Noncurrent Liabilities Associated with Assets Held for Sale |  |  |
Operating lease liabilities |  |  | 5
Asset retirement obligations | 4 |  | 9
Regulatory liabilities | 161 |  | 173
Disposal Group, Including Discontinued Operation, Unrealized Losses On Commodity Hedges, Noncurrent |  |  | 66
Other | 5 |  | 18
Total noncurrent liabilities associated with assets held for sale | 170 |  | 271
Total Liabilities Associated with Assets Held for Sale | 254 |  | 403
Discontinued Operations, Held-for-sale | Commercial Renewables Disposal Groups |  |  |
Current Assets Held for Sale |  |  |
Receivables, net | 0 |  | 0
Inventory | 0 |  | 0
Other | 0 |  | 4
Total current assets held for sale | 0 |  | 4
Noncurrent Assets Held for Sale |  |  |
Cost | 0 |  | 109
Accumulated depreciation and amortization | 0 |  | (24)
Net property, plant and equipment | 0 |  | 85
Goodwill | 0 |  | 0
Regulatory assets | 0 |  | 0
Operating lease right-of-use assets, net |  |  | 4
Total noncurrent assets held for sale | 0 |  | 89
Total Assets Held for Sale | 0 |  | 93
Current Liabilities Associated with Assets Held for Sale |  |  |
Accounts payable | 18 |  | 19
Taxes accrued |  |  | 1
Current maturities of long-term debt |  |  | 43
Unrealized losses on commodity hedges |  |  | 13
Other | 0 |  | 4
Total current liabilities associated with assets held for sale | 18 |  | 80
Noncurrent Liabilities Associated with Assets Held for Sale |  |  |
Operating lease liabilities |  |  | 5
Asset retirement obligations | 0 |  | 5
Regulatory liabilities | 0 |  | 0
Disposal Group, Including Discontinued Operation, Unrealized Losses On Commodity Hedges, Noncurrent |  |  | 66
Other | 0 |  | 13
Total noncurrent liabilities associated with assets held for sale | 0 |  | 89
Total Liabilities Associated with Assets Held for Sale | 18 |  | 169
Discontinued Operations, Held-for-sale | Piedmont Tennessee Disposal Group |  |  |
Current Assets Held for Sale |  |  |
Receivables, net | 82 |  | 64
Inventory | 12 |  | 12
Other | 15 |  | 16
Total current assets held for sale | 109 |  | 92
Noncurrent Assets Held for Sale |  |  |
Cost | 2,219 |  | 2,069
Accumulated depreciation and amortization | (406) |  | (392)
Net property, plant and equipment | 1,813 |  | 1,677
Goodwill | 294 | $ 294 | 294
Regulatory assets | 41 |  | 35
Operating lease right-of-use assets, net |  |  | 0
Total noncurrent assets held for sale | 2,148 |  | 2,006
Total Assets Held for Sale | 2,257 |  | 2,098
Current Liabilities Associated with Assets Held for Sale |  |  |
Accounts payable | 58 |  | 42
Taxes accrued |  |  | 1
Current maturities of long-term debt |  |  | 0
Unrealized losses on commodity hedges |  |  | 0
Other | 8 |  | 9
Total current liabilities associated with assets held for sale | 66 |  | 52
Noncurrent Liabilities Associated with Assets Held for Sale |  |  |
Operating lease liabilities |  |  | 0
Asset retirement obligations | 4 |  | 4
Regulatory liabilities | 161 |  | 173
Disposal Group, Including Discontinued Operation, Unrealized Losses On Commodity Hedges, Noncurrent |  |  | 0
Other | 5 |  | 5
Total noncurrent liabilities associated with assets held for sale | 170 |  | 182
Total Liabilities Associated with Assets Held for Sale | 236 |  | 234
Discontinued Operations, Held-for-sale | Piedmont | Piedmont Tennessee Disposal Group |  |  |
Current Assets Held for Sale |  |  |
Receivables, net | 82 |  | 64
Inventory | 12 |  | 12
Other | 15 |  | 16
Total current assets held for sale | 109 |  | 92
Noncurrent Assets Held for Sale |  |  |
Cost | 2,219 |  | 2,069
Accumulated depreciation and amortization | (406) |  | (392)
Net property, plant and equipment | 1,813 |  | 1,677
Goodwill | 10 |  | 10
Regulatory assets | 41 |  | 35
Operating lease right-of-use assets, net |  |  | 0
Total noncurrent assets held for sale | 1,864 |  | 1,722
Total Assets Held for Sale | 1,973 |  | 1,814
Current Liabilities Associated with Assets Held for Sale |  |  |
Accounts payable | 58 |  | 42
Taxes accrued |  |  | 1
Current maturities of long-term debt |  |  | 0
Unrealized losses on commodity hedges |  |  | 0
Other | 8 |  | 9
Total current liabilities associated with assets held for sale | 66 |  | 52
Noncurrent Liabilities Associated with Assets Held for Sale |  |  |
Operating lease liabilities |  |  | 0
Asset retirement obligations | 4 |  | 4
Regulatory liabilities | 161 |  | 173
Disposal Group, Including Discontinued Operation, Unrealized Losses On Commodity Hedges, Noncurrent |  |  | 0
Other | 5 |  | 5
Total noncurrent liabilities associated with assets held for sale | 170 |  | 182
Total Liabilities Associated with Assets Held for Sale | $ 236 |  | $ 234

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