Statements of Income - MPC - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating Revenues:
Total operating revenues	$ 29,553,000,000	$ 26,724,000,000	$ 25,253,000,000
Operating Expenses:
Other operations and maintenance	7,066,000,000	6,518,000,000	6,025,000,000
Depreciation and amortization	5,501,000,000	4,755,000,000	4,525,000,000
Taxes other than income taxes	1,538,000,000	1,540,000,000	1,425,000,000
Total operating expenses	22,268,000,000	19,656,000,000	19,427,000,000
Operating Income	7,285,000,000	7,068,000,000	5,826,000,000
Other Income and (Expense):
Interest expense, net of amounts capitalized	(3,238,000,000)	(2,743,000,000)	(2,446,000,000)
Other income (expense), net	500,000,000	530,000,000	553,000,000
Total other income and (expense)	(2,286,000,000)	(1,839,000,000)	(1,481,000,000)
Earnings Before Income Taxes	4,999,000,000	5,229,000,000	4,345,000,000
Income taxes	828,000,000	969,000,000	496,000,000
Net Income	4,341,000,000	4,401,000,000	3,976,000,000
Retail revenues
Operating Revenues:
Total operating revenues	19,331,000,000	17,790,000,000	16,343,000,000
Other revenues
Operating Revenues:
Total operating revenues	1,284,000,000	1,151,000,000	949,000,000
Operating Expenses:
Fuel and purchased power	687,000,000	668,000,000	560,000,000
Mississippi Power
Operating Revenues:
Total operating revenues	1,695,000,000	1,463,000,000	1,474,000,000
Operating Expenses:
Other operations and maintenance	387,000,000	370,000,000	362,000,000
Depreciation and amortization	211,000,000	193,000,000	190,000,000
Taxes other than income taxes	139,000,000	127,000,000	124,000,000
Total operating expenses	1,361,000,000	1,167,000,000	1,214,000,000
Operating Income	334,000,000	296,000,000	260,000,000
Other Income and (Expense):
Interest expense, net of amounts capitalized	(79,000,000)	(77,000,000)	(71,000,000)
Other income (expense), net	25,000,000	27,000,000	35,000,000
Total other income and (expense)	(54,000,000)	(50,000,000)	(36,000,000)
Earnings Before Income Taxes	280,000,000	246,000,000	224,000,000
Income taxes	65,000,000	47,000,000	36,000,000
Net Income	215,000,000	199,000,000	188,000,000
Mississippi Power | Retail revenues
Operating Revenues:
Total operating revenues	1,085,000,000	965,000,000	963,000,000
Mississippi Power | Wholesale revenues, non-affiliates
Operating Revenues:
Total operating revenues	275,000,000	228,000,000	272,000,000
Mississippi Power | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	280,000,000	218,000,000	200,000,000
Mississippi Power | Other revenues
Operating Revenues:
Total operating revenues	55,000,000	52,000,000	39,000,000
Mississippi Power | Fuel and purchased power
Operating Expenses:
Fuel and purchased power	$ 624,000,000	$ 477,000,000	$ 538,000,000