| Sep 30, 2010 | Sep 30, 2011 | Sep 30, 2012 | Sep 30, 2013 | Sep 30, 2014 | Sep 30, 2015 | Sep 30, 2016 | Sep 30, 2017 | Sep 30, 2018 | Sep 30, 2019 | Sep 30, 2020 | Sep 30, 2021 | Sep 30, 2022 | Sep 30, 2023 | Sep 30, 2024 |
|---|
| Net Income Available for Common Stock | 226 | 258 | 220 | 260 | 299 | -379 | -291 | 283 | 392 | 304 | -124 | 364 | 566 | 477 | 78 |
|---|
| Gain on Sale of Assets | - | - | - | - | - | - | - | - | - | - | - | - | 13 | - | - |
|---|
| Impairment of Assets | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 519 |
|---|
| Depreciation, Depletion and Amortization | 192 | 227 | 272 | 327 | 384 | 336 | 249 | 224 | 241 | 276 | 306 | 335 | 370 | 410 | 457 |
|---|
| Deferred Income Taxes | 135 | 164 | 144 | 168 | 142 | -358 | -247 | 118 | -18 | 122 | 54 | 106 | 104 | 151 | -3 |
|---|
| Stock-Based Compensation | - | - | - | 12 | 12 | 3 | 6 | 12 | 16 | 21 | 15 | 17 | 20 | 21 | 22 |
|---|
| Reduction of Other Post-Retirement Regulatory Liability | - | - | - | - | - | - | - | - | - | - | - | - | 19 | - | - |
|---|
| Other | - | - | 13 | 15 | -14 | -10 | -13 | -16 | -16 | -9 | -7 | -11 | -32 | -20 | -24 |
|---|
| Receivables and Unbilled Revenue | 10 | -4 | -14 | 17 | 23 | -52 | 6 | 3 | 31 | -6 | 3 | 61 | 169 | -214 | -34 |
|---|
| Gas Stored Underground and Materials, Supplies and Emission Allowances | 7 | 10 | -5 | 3 | -13 | -3 | 4 | 1 | 4 | 4 | 7 | 2 | -3 | 8 | -2 |
|---|
| Unrecovered Purchased Gas Costs | - | - | - | 12 | -12 | - | 2 | 2 | -0 | -2 | -2 | 33 | 66 | -99 | - |
|---|
| Other Current Assets | - | - | -10 | 0 | 4 | -3 | -3 | -8 | 17 | 29 | -49 | 12 | -0 | 41 | -8 |
|---|
| Accounts Payable | -8 | 37 | -15 | 8 | 15 | 35 | -41 | 17 | 18 | -25 | -5 | 31 | 12 | -37 | 6 |
|---|
| Amounts Payable to Customers | 68 | -23 | 4 | -7 | 21 | 23 | -37 | -20 | 3 | 1 | 7 | -11 | 0 | 59 | -16 |
|---|
| Customer Advances | - | - | - | - | - | - | - | - | - | -1 | 2 | 2 | 9 | -5 | -2 |
|---|
| Customer Security Deposits | - | - | - | - | - | - | - | - | - | -9 | 1 | 2 | 5 | 4 | 8 |
|---|
| Other Accruals and Current Liabilities | -4 | 2 | 11 | 1 | 7 | -7 | 3 | 27 | 4 | 11 | 5 | 34 | 34 | -68 | 3 |
|---|
| Other Assets | - | - | - | - | - | - | - | - | - | - | 24 | -1 | 59 | 27 | 48 |
|---|
| Other Liabilities | -1 | -24 | -8 | -2 | 7 | 23 | -13 | 2 | 1 | 5 | 5 | -34 | -18 | -31 | -25 |
|---|
| Net Cash Provided by Operating Activities | 460 | 677 | 661 | - | - | - | - | - | - | 694 | 741 | 792 | 813 | 1,237 | 1,066 |
|---|
| Capital Expenditures | 456 | 838 | 1,037 | 703 | 914 | 1,018 | 582 | 450 | 584 | 789 | 716 | 752 | 812 | 1,010 | 931 |
|---|
| Proceeds from Sale of Oil and Gas Property and Equipment | - | 64 | - | - | - | - | 137 | 27 | 56 | - | - | - | 254 | - | - |
|---|
| Proceeds from Sale of Equity Securities, FV-NI | - | - | - | - | - | - | - | - | - | - | - | - | 30 | 10 | - |
|---|
| Acquisition of Upstream Assets | - | - | - | - | - | - | - | - | - | - | - | - | - | 125 | - |
|---|
| Other | 0 | 3 | -0 | 3 | -6 | 7 | 9 | -1 | 0 | 10 | 1 | -14 | -9 | -12 | 3 |
|---|
| Net Cash Used in Investing Activities | -402 | -718 | -1,036 | - | - | - | - | - | - | -799 | -1,224 | -633 | -519 | -1,112 | -934 |
|---|
| Proceeds from Issuance of Short-Term Note Payable to Bank | - | - | - | - | - | - | - | - | - | - | - | - | - | 250 | - |
|---|
| Repayment of Short-Term Note Payable to Bank | - | - | - | - | - | - | - | - | - | - | - | - | - | 250 | - |
|---|
| Net Change in Other Short-Term Notes Payable to Banks and Commercial Paper | - | - | - | - | - | - | - | - | - | - | - | - | - | 228 | -197 |
|---|
| Proceeds from Issuance of Long-Term Debt | - | - | 496 | 495 | - | 445 | - | 295 | 295 | - | 493 | 495 | - | 297 | 299 |
|---|
| Shares Repurchased Under Repurchase Plan | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 64 |
|---|
| Reduction of Long-Term Debt | - | 200 | 150 | 250 | - | - | - | - | 567 | - | - | 516 | - | 549 | - |
|---|
| Net Repurchases of Common Stock Under Stock and Benefit Plans | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 4 |
|---|
| Dividends Paid on Common Stock | 110 | 115 | 119 | 123 | 127 | 131 | 135 | 139 | 143 | 147 | 153 | 163 | 168 | 176 | 184 |
|---|
| Net Cash Used in Financing Activities | -70 | -276 | 370 | - | - | - | - | - | - | -101 | 476 | -59 | -276 | -207 | -149 |
|---|
| Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash | - | - | - | - | - | - | - | - | - | -206 | -7 | 100 | 18 | -82 | -17 |
|---|
| Interest | - | - | - | - | - | - | - | - | - | 103 | 103 | 135 | 124 | 124 | 125 |
|---|
| Income Taxes | - | - | 0 | 13 | 41 | 19 | 34 | 35 | 32 | - | - | 6 | 17 | 38 | 4 |
|---|
| Non-Cash Capital Expenditures | - | - | - | - | 137 | 119 | 60 | 72 | 89 | 81 | 87 | 103 | 120 | 109 | 120 |
|---|
| Non-Cash Contingent Consideration for Asset Sale | - | - | - | - | - | - | - | - | - | - | - | - | 13 | - | - |
|---|