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Condensed Parent Company Financial Statements (Tables) | 12 Months Ended
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Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract] |
Condensed Statements of Income |
ALLIANT ENERGY CORPORATION (Parent Company Only) | Year Ended December 31,
CONDENSED STATEMENTS OF INCOME | 2023 |  | 2022 |  | 2021
| (in millions)
Operating expenses | $3 |  |  | $9 |  |  | $5 |
Operating loss | (3) |  |  | (9) |  |  | (5) |
Other (income) and deductions: |  |  |  |  |
Equity earnings from consolidated subsidiaries | (742) |  |  | (707) |  |  | (664) |
Interest expense | 34 |  |  | 6 |  |  | 1 |
Other | 4 |  |  | 1 |  |  | 1 |
Total other (income) and deductions | (704) |  |  | (700) |  |  | (662) |
Income before income taxes | 701 |  |  | 691 |  |  | 657 |
Income tax expense (benefit) | (5) |  |  | 2 |  |  | (5) |
Net income | $706 |  |  | $689 |  |  | $662 |
Refer to accompanying Notes to Condensed Financial Statements.
Condensed Balance Sheets |
ALLIANT ENERGY CORPORATION (Parent Company Only) | December 31,
CONDENSED BALANCE SHEETS | 2023 |  | 2022
| (in millions)
ASSETS |  |  |
Current assets: |  |  |
Notes receivable from affiliated companies | $96 |  |  | $65 |
Other | 1 |  |  | 1 |
Total current assets | 97 |  |  | 66 |
Investments: |  |  |
Investments in consolidated subsidiaries | 8,405 |  |  | 7,801 |
Other | 2 |  |  | 2 |
Total investments | 8,407 |  |  | 7,803 |
Other assets | 90 |  |  | 97 |
Total assets | $8,594 |  |  | $7,966 |
LIABILITIES AND EQUITY |  |  |
Current liabilities: |  |  |
Commercial paper | $157 |  |  | $352 |
Notes payable to affiliated companies | 1,068 |  |  | 1,318 |
Other | 10 |  |  | 10 |
Total current liabilities | 1,235 |  |  | 1,680 |
Long-term debt, net | 568 |  |  | — |
Other liabilities | 2 |  |  | 1 |
Common equity: |  |  |
Common stock and additional paid-in capital | 3,033 |  |  | 2,780 |
Retained earnings | 3,768 |  |  | 3,518 |
Accumulated other comprehensive income | 1 |  |  | — |
Shares in deferred compensation trust | (13) |  |  | (13) |
Total common equity | 6,789 |  |  | 6,285 |
Total liabilities and equity | $8,594 |  |  | $7,966 |
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 | 2023 |  | 2022 |  | 2021
| (in millions)
Net cash flows from operating activities | $445 |  |  | $492 |  |  | $494 |
Cash flows used for investing activities: |  |  |  |  |
Capital contributions to consolidated subsidiaries | (325) |  |  | (530) |  |  | (295) |
Net change in notes receivable from and payable to affiliates | (281) |  |  | 369 |  |  | (21) |
Dividends from consolidated subsidiaries in excess of equity earnings | — |  |  | — |  |  | 50 |
Net cash flows used for investing activities | (606) |  |  | (161) |  |  | (266) |
Cash flows from (used for) financing activities: |  |  |  |  |
Common stock dividends | (456) |  |  | (428) |  |  | (403) |
Proceeds from issuance of common stock, net | 246 |  |  | 25 |  |  | 28 |
Proceeds from issuance of long-term debt | 565 |  |  | — |  |  | — |
Net change in commercial paper | (195) |  |  | 73 |  |  | 147 |
Other | 1 |  |  | (1) |  |  | — |
Net cash flows from (used for) financing activities | 161 |  |  | (331) |  |  | (228) |
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) refunded during the period for: |  |  |  |  |
Interest | ($27) |  |  | ($6) |  |  | ($1) |
Income taxes, net | $22 |  |  | $15 |  |  | $4 |
Refer to accompanying Notes to Condensed Financial Statements.

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