| Operating revenues | |
| Operating revenues | |
| Operating expenses | |
| Purchased power | |
| Fuel | |
| Operating and maintenance | |
| Operating and maintenance for regulatory required programs | |
| Depreciation and amortization | |
| Taxes other than income | |
| Total operating expenses | |
| Operating income | |
| Other income and deductions | |
| Interest expense | |
| Interest expense to affiliates, net | |
| Equity in losses of investments | |
| Other, net | |
| Total other income and deductions | |
| Income before income taxes | |
| Income taxes | |
| Income from continuing operations | |
| Discontinued operations | |
| Loss on disposal of discontinued operations (net of taxes of $0, $0, $0 and $0 for the three and nine months ended September 30, 2009 and 2008, respectively) | |
| Loss from discontinued operations, net | |
| Net income | |
| Comprehensive income, net of income taxes | |
| Net income | |
| Pension and non-pension postretirement benefit plans: | |
| Prior service benefit reclassified to periodic benefit cost | |
| Pension and non-pension postretirement benefit plans valuation adjustment | |
| Change in unrealized gain (loss) on cash-flow hedges | |
| Change in unrealized gain (loss) on marketable securities | |
| Other comprehensive income (loss) | |
| Comprehensive income | |
| Income from continuing operations | |
| Net income | |
| Income from continuing operations | |
| Net income | |
| Operating revenues | |
| Operating revenues | |
| Operating revenues from affiliates | |
| Total operating revenues | |
| Operating expenses | |
| Purchased power | |
| Fuel | |
| Operating and maintenance | |
| Operating and maintenance from affiliate | |
| Depreciation and amortization | |
| Taxes other than income | |
| Total operating expenses | |
| Operating income | |
| Other income and deductions | |
| Interest expense | |
| Equity in losses of investments | |
| Other, net | |
| Total other income and deductions | |
| Income before income taxes | |
| Income taxes | |
| Income from continuing operations | |
| Discontinued operations | |
| Loss on disposal of discontinued operations (net of taxes of $0, $0, $0 and $0 for the three and nine months ended September 30, 2009 and 2008, respectively) | |
| Loss from discontinued operations, net | |
| Net income | |
| Comprehensive income, net of income taxes | |
| Net income | |
| Pension and non-pension postretirement benefit plans: | |
| Prior service benefit reclassified to periodic benefit cost | |
| Pension and non-pension postretirement benefit plans valuation adjustment | |
| Change in unrealized gain (loss) on cash-flow hedges | |
| Other comprehensive income (loss) | |
| Comprehensive income | |
| Operating revenues | |
| Operating revenues | |
| Operating revenues from affiliates | |
| Total operating revenues | |
| Operating expenses | |
| Purchased power | |
| Purchased power from affiliate | |
| Operating and maintenance | |
| Operating and maintenance from affiliate | |
| Operating and maintenance for regulatory required programs | |
| Depreciation and amortization | |
| Taxes other than income | |
| Total operating expenses | |
| Operating income | |
| Other income and deductions | |
| Interest expense | |
| Interest expense to affiliates, net | |
| Equity in losses of investments | |
| Other, net | |
| Total other income and deductions | |
| Income before income taxes | |
| Income taxes | |
| Discontinued operations | |
| Net income | |
| Comprehensive income, net of income taxes | |
| Net income | |
| Pension and non-pension postretirement benefit plans: | |
| Change in unrealized gain (loss) on marketable securities | |
| Other comprehensive income (loss) | |
| Comprehensive income | |
| Operating revenues | |
| Operating revenues | |
| Operating revenues from affiliates | |
| Total operating revenues | |
| Operating expenses | |
| Purchased power | |
| Purchased power from affiliate | |
| Fuel | |
| Operating and maintenance | |
| Operating and maintenance from affiliate | |
| Depreciation and amortization | |
| Taxes other than income | |
| Total operating expenses | |
| Operating income | |
| Other income and deductions | |
| Interest expense | |
| Interest expense to affiliates, net | |
| Equity in losses of investments | |
| Other, net | |
| Total other income and deductions | |
| Income before income taxes | |
| Income taxes | |
| Discontinued operations | |
| Net income | |
| Comprehensive income, net of income taxes | |
| Net income | |
| Pension and non-pension postretirement benefit plans: | |
| Other comprehensive income (loss) | |
| Comprehensive income |