| Utility plant, at cost | assets | 4.58B | |
| Nonutility plant and equipment, at cost | assets | 2.00B | |
| Construction work in progress | assets | 449.25M | |
| Billed | assets | 291.05M | |
| Construction work in progress | assets | 278.05M | |
| Cash and cash equivalents | assets | 125.28M | |
| Unbilled revenues | assets | 79.01M | |
| Natural gas in storage, at average cost | assets | 60.53M | |
| Other current assets | assets | 45.35M | |
| Materials and supplies, at average cost | assets | 45.28M | |
| Regulatory assets | assets | 31.95M | |
| Prepaid taxes | assets | 26.50M | |
| Prepaid expenses | assets | 19.45M | |
| Derivatives, at fair value | assets | 9.53M | |
| Restricted broker margin accounts | assets | 8.81M | |
| Total property, plant and equipment | assets | 7.30B | |
| Aggregate | assets | 742.76M | |
| Regulatory assets | assets | 619.75M | |
| Operating lease assets | assets | 188.22M | |
| Investments in equity method investees | assets | 102.78M | |
| Other noncurrent assets | assets | 98.82M | |
| Postemployment employee benefit assets | assets | 43.04M | |
| Notes receivable | assets | 42.50M | |
| Deferred income taxes | assets | 20.86M | |
| Software costs | assets | 11.20M | |
| Derivatives, at fair value | assets | 1.72M | |
| Property, plant and equipment, net | assets | 6.08B | |
| Total noncurrent assets | assets | 1.13B | |
| Public utilities, property, plant and equipment, accumulated depreciation | assets | 900.18M | |
| Total current assets | assets | 730.28M | |
| Accumulated depreciation, depletion and amortization, other property, plant, and equipment | assets | 318.59M | |
| Accounts receivable, allowance for credit loss, current | assets | 12.47M | |
| Assets | assets | 7.94B | |
| Total capitalization | liabilities | 5.93B | |
| Total noncurrent liabilities | liabilities | 1.24B | |
| Total current liabilities | liabilities | 777.03M | |
| Long-term debt | liabilities | 3.28B | |
| Accumulated other comprehensive income (loss), net of tax | equity | 10.95M | |
| Common stock equity | equity | 2.65B | |
| Deferred income taxes | liabilities | 490.78M | |
| Regulatory liabilities | liabilities | 168.99M | |
| Manufactured gas plant remediation | liabilities | 166.11M | |
| Operating lease liabilities | liabilities | 163.05M | |
| Postemployment employee benefit liability | liabilities | 110.02M | |
| Asset retirement obligations | liabilities | 77.54M | |
| Deferred revenue | liabilities | 41.98M | |
| Other noncurrent liabilities | liabilities | 10.46M | |
| Derivatives, at fair value | liabilities | 5.27M | |
| Deferred investment tax credits | liabilities | 1.74M | |
| Accounts payable and other | liabilities | 169.99M | |
| Current maturities of long-term debt | liabilities | 164.59M | |
| Short-term debt | liabilities | 150.00M | |
| Natural gas purchases payable | liabilities | 75.81M | |
| Regulatory liability-current | liabilities | 72.35M | |
| Dividends payable | liabilities | 47.91M | |
| Accrued taxes | liabilities | 30.33M | |
| Customers' credit balances and deposits | liabilities | 22.94M | |
| Deferred revenue | liabilities | 21.14M | |
| Derivatives, at fair value | liabilities | 8.12M | |
| New jersey clean energy program | liabilities | 6.93M | |
| Operating lease liabilities | liabilities | 5.17M | |
| Restricted broker margin accounts | liabilities | 1.11M | |
| Natural gas purchases payable to related parties | liabilities | 641000 | |
| Aggregate | equity | 2.66B | |
| Retained earnings | equity | 1.70B | |
| Premium on common stock | equity | 693.47M | |
| Common stock, $2.50 par value; authorized 150,000,000 shares; outstanding shares march 31, 2026 — 100,861,916; september 30, 2025 — 100,478,590 | equity | 251.67M | |
| Treasury stock at cost and other; shares march 31, 2026 — 18,922; september 30, 2025 — 17,273 | equity | 17.37M | |