Condensed Statements of Cash Flows (Unaudited) - MPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net income (loss)	$ 2,079	$ 1,482
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	1,995	1,949
Other, net	21	117
Changes in certain current assets and liabilities —
Receivables	(637)	29
Other current assets	12	94
Accounts payable	703	(177)
Accrued taxes	(150)	(157)
Retail fuel cost over recovery	0	(146)
Other current liabilities	30	(235)
Net cash provided from operating activities	3,579	2,904
Investing Activities:
Property additions	(3,213)	(3,384)
Payments pursuant to LTSAs	(81)	(114)
Other investing activities	96	(20)
Net cash used for investing activities	(3,460)	(4,026)
Financing Activities:
Increase (decrease) in notes payable, net	263	492
Payment of common stock dividends	(1,425)	(1,377)
Other financing activities	(219)	(167)
Net cash provided from (used for) financing activities	(213)	1,671
Net Change in Cash, Cash Equivalents, and Restricted Cash	(94)	549
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1,829	1,068
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,735	1,617
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	836	884
Income taxes, net	157	88
Noncash transactions —
Accrued property additions at year-end	837	943
Mississippi Power
Operating Activities:
Net income (loss)	87	83
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	110	106
Other, net	13	(28)
Changes in certain current assets and liabilities —
Receivables	(92)	1
Retail fuel cost under recovery	(25)	0
Other current assets	(23)	(4)
Accounts payable	79	(33)
Accrued taxes	(36)	(51)
Retail fuel cost over recovery	0	(15)
Other current liabilities	(1)	(18)
Net cash provided from operating activities	112	41
Investing Activities:
Property additions	(87)	(90)
Construction payables	(16)	(3)
Payments pursuant to LTSAs	(15)	(14)
Other investing activities	(15)	(10)
Net cash used for investing activities	(133)	(117)
Financing Activities:
Increase (decrease) in notes payable, net	16
Increase (decrease) in notes payable, net		(25)
Proceeds — Senior notes	0	525
Capital contributions from parent company	51	101
Payment of common stock dividends	(85)	(79)
Other financing activities	0	(7)
Net cash provided from (used for) financing activities	(18)	515
Net Change in Cash, Cash Equivalents, and Restricted Cash	(39)	439
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	61	39
Cash, Cash Equivalents, and Restricted Cash at End of Period	22	478
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	26	31
Income taxes, net	5	7
Noncash transactions —
Accrued property additions at year-end	$ 9	$ 31