| Dec 31, 2010 | Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
|---|
| Net Income | 75 | 94 | 97 | 105 | 126 | 142 | 156 | 172 | 174 | 186 | 162 | 138 | 131 | 179 | 122 |
|---|
| AFUDC – Equity | - | - | 5 | 5 | 8 | 3 | 2 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 5 |
|---|
| Income from Equity Investments – Net of Dividends | -3 | -3 | -4 | -4 | -3 | -2 | -6 | -3 | -2 | 6 | 3 | -2 | -2 | -1 | 2 |
|---|
| (Gain) / Loss on Investments and Property, Plant and Equipment | -1 | -1 | 0 | -0 | - | - | - | - | - | - | 1 | 1 | -1 | - | - |
|---|
| Depreciation | 81 | 90 | 100 | 117 | 136 | 166 | 191 | 172 | 200 | 201 | 218 | 232 | 242 | 252 | 271 |
|---|
| Amortization of PSAs | - | - | - | - | 13 | 23 | 22 | 24 | 24 | 12 | 11 | 11 | 8 | 5 | 5 |
|---|
| Other Depreciation and Amortization | - | - | - | - | - | 6 | 10 | 10 | 10 | 13 | 10 | 10 | 8 | 7 | 7 |
|---|
| Deferred Income Tax Expense (Benefit) | 66 | 36 | 38 | 29 | 33 | 25 | 19 | 14 | -16 | -7 | -39 | -27 | -38 | 18 | -16 |
|---|
| Share-Based and ESOP Compensation Expense | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 7 | 7 | 6 | 6 | 6 | 5 | 7 | 7 |
|---|
| Defined Benefit Pension and Other Postretirement Plan Expense (Benefit) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | -14 |
|---|
| Bad Debt Expense | 1 | 1 | 1 | 1 | 2 | 2 | 4 | 1 | 1 | -0 | 3 | 1 | 2 | 1 | 1 |
|---|
| Fuel Adjustment Clause | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
|---|
| Provision (Payments) for Interim Rate Refund | - | - | - | - | - | - | - | - | - | - | - | - | 18 | -18 | 23 |
|---|
| Accounts Receivable | 18 | 19 | -10 | -9 | -3 | 1 | -5 | -8 | -11 | -23 | 18 | 13 | 14 | -2 | 13 |
|---|
| Inventories | -3 | -9 | -1 | 11 | -17 | -22 | 13 | 12 | 56 | 4 | 1 | 24 | 256 | -277 | -7 |
|---|
| Prepayments and Other | -4 | 2 | -6 | -1 | 5 | 4 | -7 | -5 | -4 | -0 | -1 | 1 | 22 | 8 | 11 |
|---|
| Accounts Payable | 6 | -9 | -1 | 1 | 11 | -19 | 7 | -7 | 14 | -9 | 12 | 15 | -1 | -4 | -3 |
|---|
| Other Current Liabilities | - | - | 22 | 1 | -3 | 5 | -14 | 2 | 7 | -14 | 17 | 28 | 116 | -158 | 1 |
|---|
| Renewable Tax Credit Sales | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 61 |
|---|
| Cash Contributions to Defined Benefit Pension Plans | - | - | - | - | - | - | 6 | 2 | 15 | 10 | 11 | 10 | - | 17 | 25 |
|---|
| Changes in Regulatory and Other Non-Current Assets | - | - | -21 | -18 | -21 | 1 | -11 | 34 | 7 | 25 | 31 | 12 | -24 | -16 | -42 |
|---|
| Increase (Decrease) in Other Noncurrent Liabilities | - | - | 1 | -7 | 3 | -3 | 11 | -32 | -4 | -16 | -9 | -15 | 0 | 2 | 7 |
|---|
| Cash provided by Operating Activities | 229 | 242 | 240 | 239 | 270 | 340 | 332 | 403 | 433 | 250 | 300 | 264 | 221 | 585 | 457 |
|---|
| Proceeds from Sale of Available-for-sale Securities | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 |
|---|
| Payments for Purchase of Available-for-sale Securities | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 |
|---|
| Acquisitions of Subsidiaries – Net of Cash and Restricted Cash Acquired | - | - | - | - | 60 | 333 | 6 | 19 | - | - | - | - | 155 | - | - |
|---|
| Payments for Equity Investments | - | - | - | - | - | 2 | 5 | 8 | 39 | 38 | 99 | 18 | 6 | 8 | 6 |
|---|
| Additions to Property, Plant and Equipment | 249 | 239 | 406 | 329 | 573 | 287 | 266 | 209 | 312 | 597 | 718 | 473 | 221 | 271 | 355 |
|---|
| Other Investing Activities | -1 | 7 | 10 | 12 | -33 | -3 | -4 | -3 | -6 | -13 | - | -3 | 2 | 4 | -20 |
|---|
| Cash used in Investing Activities | -251 | -241 | -420 | -337 | -626 | -619 | -276 | -229 | -349 | -345 | -813 | -485 | -384 | -284 | -341 |
|---|
| Proceeds from Issuance of Common Stock | 21 | 39 | 77 | 98 | 201 | 161 | 31 | 86 | 20 | 2 | 18 | 70 | 248 | 15 | 13 |
|---|
| Equity Issuance Costs | - | - | - | - | - | - | - | - | - | - | - | - | 8 | - | - |
|---|
| Proceeds from Issuance of Long-Term Debt | 155 | 81 | 181 | 170 | 375 | 325 | 5 | 132 | 76 | 202 | 672 | 733 | 785 | 437 | 658 |
|---|
| Repayments of Short-Term and Long-Term Debt | 71 | 3 | 26 | 78 | 135 | 160 | 55 | 190 | 96 | 72 | 489 | 553 | 877 | 567 | 649 |
|---|
| Proceeds from Noncontrolling Interests | - | - | - | - | - | - | - | - | - | 104 | 415 | 91 | 156 | 18 | 4 |
|---|
| Distributions to Non-Controlling Interest | - | - | - | - | - | - | - | - | - | - | - | - | - | 9 | 2 |
|---|
| Dividends on Common Stock | 61 | 62 | 69 | 75 | 84 | 98 | 103 | 109 | 115 | 121 | 128 | 132 | 146 | 156 | 163 |
|---|
| Other Financing Activities | - | - | - | - | 54 | - | -1 | -2 | -1 | -1 | -2 | -5 | -3 | -1 | -2 |
|---|
| Cash provided (used in) by Financing Activities | 41 | 55 | 160 | 114 | 404 | 230 | -125 | -102 | -115 | 109 | 486 | 204 | 155 | -262 | -141 |
|---|
| Change in Cash, Cash Equivalents and Restricted Cash | - | - | - | - | - | - | - | - | -31 | 14 | -27 | -17 | -7 | 39 | -24 |
|---|