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Balance Sheets - MPC (Parenthetical) - shares | Dec. 31, 2023 | Dec. 31, 2022
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Common Stockholders' Equity: |  |
Common stock, shares authorized (in shares) | 1,500,000,000 | 1,500,000,000
Mississippi Power |  |
Common Stockholders' Equity: |  |
Common stock, shares authorized (in shares) | 50,000,000 | 50,000,000
Common stock, shares outstanding (in shares) | 1,000,000 | 1,000,000

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