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Condensed Parent Company Financial Statements (Tables) | 12 Months Ended
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Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract] |
Condensed Statements of Income |
ALLIANT ENERGY CORPORATION (Parent Company Only) | Year Ended December 31,
CONDENSED STATEMENTS OF INCOME | 2024 |  | 2023 |  | 2022
| (in millions)
Operating expenses | $3 |  |  | $3 |  |  | $9 |
Operating loss | (3) |  |  | (3) |  |  | (9) |
Other (income) and deductions: |  |  |  |  |
Equity earnings from consolidated subsidiaries | (734) |  |  | (742) |  |  | (707) |
Interest expense | 40 |  |  | 34 |  |  | 6 |
Other | 5 |  |  | 4 |  |  | 1 |
Total other (income) and deductions | (689) |  |  | (704) |  |  | (700) |
Income before income taxes | 686 |  |  | 701 |  |  | 691 |
Income tax expense (benefit) | (3) |  |  | (5) |  |  | 2 |
Net income | $689 |  |  | $706 |  |  | $689 |
Refer to accompanying Notes to Condensed Financial Statements.
Condensed Balance Sheets |
ALLIANT ENERGY CORPORATION (Parent Company Only) | December 31,
CONDENSED BALANCE SHEETS | 2024 |  | 2023
| (in millions)
ASSETS |  |  |
Current assets: |  |  |
Notes receivable from affiliated companies | $103 |  |  | $96 |
Income tax refunds receivable | 12 |  |  | — |
Other | 2 |  |  | 1 |
Total current assets | 117 |  |  | 97 |
Investments: |  |  |
Investments in consolidated subsidiaries | 9,123 |  |  | 8,405 |
Other | 1 |  |  | 2 |
Total investments | 9,124 |  |  | 8,407 |
Other assets | 84 |  |  | 90 |
Total assets | $9,325 |  |  | $8,594 |
LIABILITIES AND EQUITY |  |  |
Current liabilities: |  |  |
Current maturities of long-term debt | $571 |  |  | $— |
Commercial paper | 325 |  |  | 157 |
Notes payable to affiliated companies | 1,401 |  |  | 1,068 |
Other | 10 |  |  | 10 |
Total current liabilities | 2,307 |  |  | 1,235 |
Long-term debt, net (excluding current portion) | — |  |  | 568 |
Other liabilities | 3 |  |  | 2 |
Common equity: |  |  |
Common stock and additional paid-in capital | 3,063 |  |  | 3,033 |
Retained earnings | 3,965 |  |  | 3,768 |
Accumulated other comprehensive income | 1 |  |  | 1 |
Shares in deferred compensation trust | (14) |  |  | (13) |
Total common equity | 7,015 |  |  | 6,789 |
Total liabilities and equity | $9,325 |  |  | $8,594 |
Refer to accompanying Notes to Condensed Financial Statements.
Condensed Statements of Cash Flows |
ALLIANT ENERGY CORPORATION (Parent Company Only) | Year Ended December 31,
CONDENSED STATEMENTS OF CASH FLOWS | 2024 |  | 2023 |  | 2022
| (in millions)
Net cash flows from operating activities | $355 |  |  | $445 |  |  | $492 |
Cash flows used for investing activities: |  |  |  |  |
Capital contributions to consolidated subsidiaries | (380) |  |  | (325) |  |  | (530) |
Net change in notes receivable from and payable to affiliates | 326 |  |  | (281) |  |  | 369 |
Net cash flows used for investing activities | (54) |  |  | (606) |  |  | (161) |
Cash flows from (used for) financing activities: |  |  |  |  |
Common stock dividends | (492) |  |  | (456) |  |  | (428) |
Proceeds from issuance of common stock, net | 23 |  |  | 246 |  |  | 25 |
Proceeds from issuance of long-term debt | — |  |  | 565 |  |  | — |
Net change in commercial paper | 168 |  |  | (195) |  |  | 73 |
Other | — |  |  | 1 |  |  | (1) |
Net cash flows from (used for) financing activities | (301) |  |  | 161 |  |  | (331) |
Net increase (decrease) in cash, cash equivalents and restricted cash | — |  |  | — |  |  | — |
Cash, cash equivalents and restricted cash at beginning of period | — |  |  | — |  |  | — |
Cash, cash equivalents and restricted cash at end of period | $— |  |  | $— |  |  | $— |
Supplemental cash flows information: |  |  |  |  |
Cash (paid) received during the period for: |  |  |  |  |
Interest | ($40) |  |  | ($27) |  |  | ($6) |
Income taxes, net | $8 |  |  | $22 |  |  | $15 |
Refer to accompanying Notes to Condensed Financial Statements.

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