Balance Sheets - MPC (Parenthetical) - shares shares in Millions	Dec. 31, 2024	Dec. 31, 2023
Common Stockholders' Equity:
Common stock, shares authorized (in shares)	1,500	1,500
Mississippi Power
Common Stockholders' Equity:
Common stock, shares authorized (in shares)	50	50
Common stock, shares outstanding (in shares)	1	1