| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|
| Period End Date | 12/31/2025 | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 |
|---|
| Operating Revenues | 9,800.10 | 8,599.90 | 8,893.00 | 9,597.40 | 8,316.00 | 7,241.70 | 7,523.10 | 7,679.50 | 7,648.50 | 7,472.30 |
| Operating Revenues : Utility energy | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Operating Revenues : Non-utility energy | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Operating Revenues : Other | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Operating Revenues : Manufacturing | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total revenues | 9,800.10 | 8,599.90 | 8,893.00 | 9,597.40 | 8,316.00 | 7,241.70 | 7,523.10 | 7,679.50 | 7,648.50 | 7,472.30 |
| COST OF GOODS SOLD | 3,265.80 | 2,656.00 | 3,191.20 | 4,358.90 | 3,311.00 | 2,319.50 | 2,678.80 | 2,897.90 | 2,822.80 | 2,647.40 |
| Cost of gas sold | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fuel and Purchased Power | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other operation and maintenance | 2,400.80 | 2,158.00 | 2,100.50 | 1,938.00 | 2,005.50 | 2,032.20 | 2,184.80 | 2,270.50 | 2,047.00 | 2,185.50 |
| Depreciation, decommissioning and amortization | 1,478.50 | 1,354.50 | 1,264.20 | 1,122.60 | 1,074.30 | 975.90 | 926.30 | 845.80 | 798.60 | 762.60 |
| Property and revenue taxes | 280.10 | 266.50 | 250.20 | 253.70 | 210.30 | 208.00 | 201.80 | 196.90 | 194.90 | 194.70 |
| Asset valuation charges ,net | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Amortization of gain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Treasury Grant | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Impairment related to Illinois Commerce Commission disallowances | (130.00) | (12.10) | (178.90) | -- | -- | -- | -- | -- | -- | -- |
| Total Operating Expenses | 7,555.20 | 6,447.10 | 6,985.00 | 7,673.20 | 6,601.10 | 5,535.60 | 5,991.70 | 6,211.10 | 5,863.30 | 5,790.20 |
| Operating income (loss) | 2,244.90 | 2,152.80 | 1,908.00 | 1,924.20 | 1,714.90 | 1,706.10 | 1,531.40 | 1,468.40 | 1,785.20 | 1,682.10 |
| Interest expense | 895.10 | 815.30 | 726.90 | 515.10 | 471.10 | 493.70 | 501.50 | 445.10 | 415.70 | 402.70 |
| Interest expense : Allowance for borrowed funds used during construction | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain (loss) on asset sales | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| DISTRIBUTIONS ON PREFERRED SECURITIES OF SUBSIDIARY TRUST | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Preferred dividend requirement of subsidiary | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Equity in earnings of unconsolidated affiliates | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Equity in Earnings of Transmission Affiliate | 215.80 | 207.50 | 177.50 | 194.70 | 158.10 | 175.80 | 127.60 | 136.70 | 154.30 | 146.50 |
| Interest income | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| AFUDC-equity | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Allowance for other funds used during construction | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other income, net | 107.90 | 178.20 | 177.70 | 128.80 | 133.20 | 79.50 | 102.20 | 70.30 | 64.60 | 80.80 |
| Loss on debt extinguishment | -- | 23.10 | 0.00 | 0.00 | (36.30) | (38.40) | -- | -- | -- | -- |
| Pre-Tax Income | 1,673.50 | 1,746.30 | 1,536.30 | 1,732.60 | 1,498.80 | 1,429.30 | 1,259.70 | 1,230.30 | 1,588.40 | 1,506.70 |
| Provision for Income taxes | 118.00 | 222.00 | 204.60 | 322.90 | 200.30 | 227.90 | 125.00 | 169.80 | 383.50 | 566.50 |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Less: Income from discontinued operations attributable to noncontrolling interest | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from Discontinued Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income Before Extraordinary Income & Accounting Change | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative effect of accounting change | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net income | 1,555.50 | 1,524.30 | 1,331.70 | 1,409.70 | 1,298.50 | 1,201.40 | 1,134.70 | 1,060.50 | 1,204.90 | 940.20 |
| Net loss attributed to noncontrolling interests | (3.20) | (4.10) | (1.20) | 0.40 | (3.00) | 0.30 | (0.50) | -- | -- | -- |
| Preferred stock dividends of subsidiaries | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 |
| Net Income (Loss) available to limited partners shareholders | 1,557.50 | 1,527.20 | 1,331.70 | 1,408.10 | 1,300.30 | 1,199.90 | 1,134.00 | 1,059.30 | 1,203.70 | 939.00 |
| Earnings Per Share (Basic) - Cont Ops | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings Per Share (Basic) - Disc Ops | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (BASIC) | 4.84 | 4.83 | 4.22 | 4.46 | 4.12 | 3.80 | 3.60 | 3.36 | 3.81 | 2.98 |
| Earnings Per Share (Diluted) - Cont Ops | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings Per Share (Diluted) - Disc Ops | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (DILUTED) | 4.81 | 4.83 | 4.22 | 4.45 | 4.11 | 3.79 | 3.58 | 3.34 | 3.79 | 2.96 |
| Weighted Average Shares Outstanding (Basic) | 321.90 | 316.20 | 315.40 | 315.40 | 315.40 | 315.40 | 315.40 | 315.50 | 315.60 | 315.60 |
| Weighted Average Shares Outstanding (Diluted) | 323.80 | 316.50 | 315.90 | 316.10 | 316.30 | 316.50 | 316.70 | 316.90 | 317.20 | 316.90 |