|
FY2025
12 months to Dec 31, 2025
|
FY2024
12 months to Dec 31, 2024
|
FY2023
12 months to Dec 31, 2023
|
FY2022
12 months to Dec 31, 2022
|
FY2021
12 months to Dec 31, 2021
|
|
|---|---|---|---|---|---|
| Revenues: | |||||
| Electric utility | |||||
| IPL | |||||
| WPL | |||||
| Total electric utility | |||||
| Gas utility | |||||
| IPL | |||||
| WPL | |||||
| Total gas utility | |||||
| Other utility | |||||
| IPL | |||||
| WPL | |||||
| Total other utility | |||||
| Non-utility | |||||
| IPL | |||||
| WPL | |||||
| Total revenues | |||||
| Operating expenses: | |||||
| Electric production fuel and purchased power | |||||
| IPL | |||||
| WPL | |||||
| Total electric production fuel and purchased power | |||||
| Electric transmission service | |||||
| IPL | |||||
| WPL | |||||
| Total electric transmission service | |||||
| Cost of gas sold | |||||
| IPL | |||||
| WPL | |||||
| Total cost of gas sold | |||||
| Asset valuation charge for IPL's Lansing Generating Station | |||||
| IPL | |||||
| Total asset valuation charge for IPL's Lansing Generating Station | |||||
| Other operation and maintenance | |||||
| Other operation and maintenance | |||||
| IPL | |||||
| WPL | |||||
| Depreciation and amortization | |||||
| IPL | |||||
| WPL | |||||
| Total depreciation and amortization | |||||
| Taxes other than income taxes | |||||
| IPL | |||||
| WPL | |||||
| Total taxes other than income taxes | |||||
| IPL | |||||
| WPL | |||||
| Total operating expenses | |||||
| Operating income (loss) | |||||
| IPL | |||||
| WPL | |||||
| Total operating income (loss) | |||||
| Other (income) and deductions: | |||||
| Interest expense | |||||
| IPL | |||||
| WPL | |||||
| Total interest expense | |||||
| Equity income from unconsolidated investments, net | |||||
| Allowance for funds used during construction | |||||
| IPL | |||||
| WPL | |||||
| Total allowance for funds used during construction | |||||
| Other | |||||
| IPL | |||||
| WPL | |||||
| Total other | |||||
| IPL | |||||
| WPL | |||||
| Total other (income) and deductions | |||||
| Income before income taxes | |||||
| IPL | |||||
| WPL | |||||
| Total income before income taxes | |||||
| Income tax expense (benefit) | |||||
| IPL | |||||
| WPL | |||||
| Total income tax expense (benefit) | |||||
| Net income | |||||
| IPL | |||||
| WPL | |||||
| Total net income | |||||
| Preferred dividend requirements of Interstate Power and Light Company | |||||
| IPL | |||||
| Total preferred dividend requirements of Interstate Power and Light Company | |||||
| Net income attributable to common shareowners | |||||
| IPL | |||||
| WPL | |||||
| Total net income attributable to common shareowners | |||||
| Weighted average number of common shares outstanding: | |||||
| Basic (in shares) | |||||
| Diluted (in shares) | |||||
| Earnings per weighted average common share attributable to Alliant Energy common shareowners: | |||||
| Basic (in dollars per share) | |||||
| Diluted (in dollars per share) |
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