Condensed Statements of Cash Flows (Unaudited) - MPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities:
Consolidated net income	$ 1,622	$ 2,079
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	2,436	1,995
Deferred income taxes	(34)	240
Pension, postretirement, and other employee benefits	(245)	(211)
Settlement of asset retirement obligations	(276)	(198)
Other, net	(50)	34
Changes in certain current assets and liabilities —
Receivables	735	(637)
Other current assets	103	(101)
Accounts payable	(997)	703
Accrued compensation	(378)	(260)
Other current liabilities	101	(120)
Net cash provided from operating activities	2,900	3,579
Investing Activities:
Property additions	(3,898)	(3,213)
Construction payables	(140)	(3)
Other investing activities	(100)	18
Net cash used for investing activities	(4,288)	(3,460)
Financing Activities:
Increase in notes payable, net		263
Payment of common stock dividends	(1,506)	(1,425)
Net cash provided from (used for) financing activities	1,595	(213)
Net Change in Cash, Cash Equivalents, and Restricted Cash	207	(94)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	2,037	1,829
Cash, Cash Equivalents, and Restricted Cash at End of Period	2,244	1,735
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	1,043	836
Income taxes, net	(40)	157
Noncash transactions —
Accrued property additions at end of period	810	837
Right-of-use assets obtained under operating leases	44	13
Mississippi Power
Operating Activities:
Consolidated net income	98	87
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	113	110
Deferred income taxes	(8)	(2)
Pension, postretirement, and other employee benefits	(10)	(8)
Settlement of asset retirement obligations	(7)	(9)
Other, net	4	32
Changes in certain current assets and liabilities —
Receivables	73	(92)
Retail fuel cost under recovery	(23)	(25)
Other current assets	(11)	(23)
Accounts payable	(79)	79
Accrued taxes	(61)	(36)
Accrued compensation	(14)	(9)
Other current liabilities	7	8
Net cash provided from operating activities	82	112
Investing Activities:
Property additions	(164)	(87)
Construction payables	(3)	(16)
Payments pursuant to LTSAs	(15)	(15)
Other investing activities	(11)	(15)
Net cash used for investing activities	(193)	(133)
Financing Activities:
Increase in notes payable, net	53	16
Proceeds — Senior notes	100	0
Capital contributions from parent company	11	51
Payment of common stock dividends	(93)	(85)
Net cash provided from (used for) financing activities	71	(18)
Net Change in Cash, Cash Equivalents, and Restricted Cash	(40)	(39)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	59	61
Cash, Cash Equivalents, and Restricted Cash at End of Period	19	22
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	34	26
Income taxes, net	31	5
Noncash transactions —
Accrued property additions at end of period	22	9
Right-of-use assets obtained under operating leases	$ 1	$ 0