Condensed Statements of Cash Flows (Unaudited) - MPC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Operating Activities:
Net income	$ 3,925	$ 3,867
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	4,425	3,916
Deferred income taxes	355	607
Pension, postretirement, and other employee benefits	(414)	(391)
Settlement of asset retirement obligations	(471)	(405)
Other, net	(22)	(121)
Changes in certain current assets and liabilities —
Receivables	200	(233)
Retail fuel cost under recovery	439	843
Fossil fuel stock	121	143
Other current assets	(187)	(181)
Accounts payable	(747)	(161)
Accrued taxes	432	179
Accrued compensation	(126)	(90)
Other current liabilities	(267)	(43)
Net cash provided from operating activities	7,205	7,615
Investing Activities:
Property additions	(8,452)	(6,206)
Cost of removal, net of salvage	(479)	(444)
Change in construction payables, net of joint owner portion	69	(119)
Other investing activities	(103)	(279)
Net cash used for investing activities	(9,599)	(6,678)
Financing Activities:
Increase (decrease) in notes payable, net	(993)	(1,264)
Redemptions —
Payment of common stock dividends	(2,254)	(2,220)
Other financing activities	(176)	(157)
Net cash provided from (used for) financing activities	4,635	(803)
Net Change in Cash, Cash Equivalents, and Restricted Cash	2,241	134
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1,101	921
Cash, Cash Equivalents, and Restricted Cash at End of Period	3,342	1,055
Supplemental Cash Flow Information:
Interest	2,173	2,015
Income taxes, net (excludes credit transfers)	231	131
Noncash transactions —
Accrued property additions at end of period	1,177	937
Mississippi Power
Operating Activities:
Net income	198	186
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	173	153
Deferred income taxes	(7)	4
Pension, postretirement, and other employee benefits	(14)	(13)
Settlement of asset retirement obligations	(14)	(13)
Plant acquisition regulatory liability	36	0
Other, net	(6)	21
Changes in certain current assets and liabilities —
Receivables	(24)	(22)
Retail fuel cost under recovery	(30)	17
Fossil fuel stock	24	(10)
Prepaid income taxes	11	0
Other current assets	(2)	(13)
Accounts payable	(12)	(29)
Accrued taxes	10	(11)
Accrued interest	(10)	(9)
Accrued compensation	(10)	(4)
Over recovered regulatory clause revenues	(20)	12
Other current liabilities	(4)	(4)
Net cash provided from operating activities	299	265
Investing Activities:
Property additions	(232)	(220)
Contributions in aid of construction	57	0
Cost of removal, net of salvage	(44)	(32)
Change in construction payables, net of joint owner portion	(27)	(3)
Payments pursuant to LTSAs	(15)	(15)
Other investing activities	(2)	(2)
Net cash used for investing activities	(263)	(272)
Financing Activities:
Increase (decrease) in notes payable, net	(14)
Increase (decrease) in notes payable, net		50
Proceeds — Senior notes	100	250
Redemptions —
Senior notes	0	(200)
Revenue bonds	(11)	0
Capital contributions from parent company	57	60
Payment of common stock dividends	(145)	(141)
Other financing activities	(2)	(2)
Net cash provided from (used for) financing activities	(15)	17
Net Change in Cash, Cash Equivalents, and Restricted Cash	21	10
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	13	38
Cash, Cash Equivalents, and Restricted Cash at End of Period	34	48
Supplemental Cash Flow Information:
Interest	69	67
Income taxes, net (excludes credit transfers)	25	35
Noncash transactions —
Accrued property additions at end of period	$ 22	$ 33