| Assets | — | — |
| Property, plant and equipment | 14,524.8a | 13,635.3a |
| Less - accumulated depreciation, depletion and amortization | 7,185.59a | 6,335.44a |
| Current assets | — | — |
| Cash and temporary cash investments | 38.22a | 55.45a |
| Receivables - net of allowance for uncollectible accounts of $26,194 and $36,295, respectively | 127.22a | 160.6a |
| Unbilled revenue | 15.52a | 16.62a |
| Gas stored underground | 35.06a | 32.51a |
| Materials and supplies - at average cost | 47.67a | 48.99a |
| Other current assets | 92.23a | 100.26a |
| Other assets | — | — |
| Recoverable future taxes | 80.08a | 69.05a |
| Unamortized debt expense | 5.6a | 7.24a |
| Other regulatory assets | 108.02a | 72.14a |
| Deferred charges | 69.66a | 82.42a |
| Other investments | 81.71a | 73.98a |
| Goodwill | 5.48a | 5.48a |
| Prepaid pension and post-retirement benefit costs | 180.23a | 200.3a |
| Fair value of derivative financial instruments | 87.91a | 50.49a |
| Other | 5.96a | 4.89a |
| Total assets | 8,319.77a | 8,280.26a |
| Capitalization and liabilities | — | — |
| Capitalization: comprehensive shareholders’ equity | — | — |
| Common stock, $1 par value; authorized - 200,000,000 shares; issued and outstanding - 91,005,993 shares and 91,819,405 shares, respectively | 91.01a | 91.82a |
| Paid in capital | 1,045.49a | 1,040.76a |
| Earnings reinvested in the business | 1,727.33a | 1,885.86a |
| Accumulated other comprehensive loss | -15.48a | -55.06a |
| Total comprehensive shareholders’ equity | 2,848.34a | 2,963.38a |
| Long-term debt, net of current portion and unamortized discount and debt issuance costs | 2,188.24a | 2,384.49a |
| Total capitalization | 5,036.59a | 5,347.86a |
| Current and accrued liabilities | — | — |
| Notes payable to banks and commercial paper | 90.7a | 287.5a |
| Current portion of long-term debt | 500a | 0a |
| Accounts payable | 165.07a | 152.19a |
| Amounts payable to customers | 42.72a | 59.02a |
| Dividends payable | 46.87a | 45.45a |
| Interest payable on long-term debt | 27.25a | 20.4a |
| Customer advances | 19.37a | 21a |
| Customer security deposits | 36.27a | 28.76a |
| Other accruals and current liabilities | 162.9a | 160.97a |
| Fair value of derivative financial instruments | 4.74a | 31.01a |
| Other liabilities | — | — |
| Deferred income taxes | 1,111.17a | 1,124.17a |
| Taxes refundable to customers | 305.65a | 268.56a |
| Cost of removal regulatory liability | 292.48a | 277.69a |
| Other regulatory liabilities | 151.45a | 165.44a |
| Other post-retirement liabilities | 3.51a | 2.92a |
| Asset retirement obligations | 203.01a | 165.49a |
| Other liabilities | 120.04a | 121.81a |
| Commitments and contingencies | 0a | 0a |
| Total capitalization and liabilities | 8,319.77a | 8,280.26a |