| Selected Balance Sheet Data |
| | | | | | | | | | | | | | | | (Millions of Dollars) | | Sept. 30, 2026 | | Dec. 31, 2025 | | Accounts receivable, net | | | | | | Accounts receivable | | $ | 551 | | | $ | 518 | | | Less allowance for bad debts | | (37) | | | (38) | | | Accounts receivable, net | | $ | 514 | | | $ | 480 | |
| | | | | | | | | | | | | | | | (Millions of Dollars) | | Sept. 30, 2026 | | Dec. 31, 2025 | | Inventories | | | | | | Materials and supplies | | $ | 178 | | | $ | 136 | | | Fuel | | 67 | | | 64 | | | Natural gas | | 66 | | | 77 | | | Total inventories | | $ | 311 | | | $ | 277 | |
| | | | | | | | | | | | | | | | (Millions of Dollars) | | Sept. 30, 2026 | | Dec. 31, 2025 | | Property, plant and equipment, net | | | | | | Electric plant | | $ | 21,851 | | | $ | 20,451 | | | Natural gas plant | | 7,542 | | | 7,222 | | | Common and other property | | 1,763 | | | 1,704 | | Plant to be retired (a) | | 889 | | | 929 | | | Construction work in progress | | 6,793 | | | 4,367 | | | Total property, plant and equipment | | 38,838 | | | 34,673 | | | Less accumulated depreciation | | (7,571) | | | (6,851) | | | Property, plant and equipment, net | | $ | 31,267 | | | $ | 27,822 | |
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