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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 480,000,000 | 480,000,000
Common stock, shares outstanding (in shares) | 256,599,202 | 256,096,848
Shares in deferred compensation trust (in shares) | 362,813 | 379,006
Shares in deferred compensation trust, weighted average cost per share (in dollars per share) | $ 35.94 | $ 34.48
IPL [Member] |  |
Common stock, par value (in dollars per share) | $ 2.50 | $ 2.50
Common stock, shares authorized (in shares) | 24,000,000 | 24,000,000
Common stock, shares outstanding (in shares) | 13,370,788 | 13,370,788
WPL [Member] |  |
Common stock, par value (in dollars per share) | $ 5 | $ 5
Common stock, shares authorized (in shares) | 18,000,000 | 18,000,000
Common stock, shares outstanding (in shares) | 13,236,601 | 13,236,601

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