Statements of Comprehensive Income - MPC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Income (Loss)	$ 2,309	$ 3,103	$ 4,744
Qualifying hedges:
Reclassification adjustment for amounts included in net income, net of tax	96	(40)	57
Current period change	158	(75)	(118)
Comprehensive Income (Loss) Attributable to Parent	2,551	3,044	4,621
Mississippi Power
Net Income (Loss)	159	152	139
Qualifying hedges:
Reclassification adjustment for amounts included in net income, net of tax	1	1	1
Current period change	1	1	1
Comprehensive Income (Loss) Attributable to Parent	$ 160	$ 153	$ 140