Condensed Statements of Common Stockholders' Equity (Unaudited) - GPC - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	GEORGIA POWER CO	GEORGIA POWER CO Common Stock	GEORGIA POWER CO Paid-In Capital	GEORGIA POWER CO Retained Earnings (Accumulated Deficit)	GEORGIA POWER CO Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020							9
Beginning balance at Dec. 31, 2020	$ 32,234	$ 5,268	$ 11,834	$ 11,311	$ (395)	$ 16,501	$ 398	$ 12,361	$ 3,789	$ (47)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						351			351
Capital contributions from parent company						332		332
Other comprehensive income (loss)	28				28	2				2
Cash dividends on common stock	(678)			(678)		(412)			(412)
Ending balance (in shares) at Mar. 31, 2021							9
Ending balance at Mar. 31, 2021	33,068	5,273	11,854	11,768	(367)	16,774	$ 398	12,693	3,728	(45)
Beginning balance (in shares) at Dec. 31, 2020							9
Beginning balance at Dec. 31, 2020	32,234	5,268	11,834	11,311	(395)	16,501	$ 398	12,361	3,789	(47)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,592					1,030
Ending balance (in shares) at Sep. 30, 2021							9
Ending balance at Sep. 30, 2021	33,219	5,278	11,932	11,844	(319)	17,361	$ 398	13,423	3,582	(42)
Beginning balance (in shares) at Mar. 31, 2021							9
Beginning balance at Mar. 31, 2021	33,068	5,273	11,854	11,768	(367)	16,774	$ 398	12,693	3,728	(45)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						143			143
Capital contributions from parent company						40		40
Other comprehensive income (loss)	12				12	1				1
Cash dividends on common stock	(699)			(699)		(412)			(412)
Ending balance (in shares) at Jun. 30, 2021							9
Ending balance at Jun. 30, 2021	32,746	5,274	11,886	11,442	(355)	16,546	$ 398	12,733	3,459	(44)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,110					536			536
Capital contributions from parent company						690		690
Other comprehensive income (loss)	36				36	2				2
Cash dividends on common stock	(700)			(700)		(413)			(413)
Ending balance (in shares) at Sep. 30, 2021							9
Ending balance at Sep. 30, 2021	33,219	5,278	11,932	11,844	(319)	17,361	$ 398	13,423	3,582	(42)
Beginning balance (in shares) at Dec. 31, 2021							9
Beginning balance at Dec. 31, 2021	32,276	5,279	11,950	10,929	(237)	17,234	$ 398	14,153	2,724	(41)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						385			385
Capital contributions from parent company						443		443
Other comprehensive income (loss)	42				42	10				10
Cash dividends on common stock	(702)			(702)		(423)			(423)
Ending balance (in shares) at Mar. 31, 2022							9
Ending balance at Mar. 31, 2022	32,629	5,286	11,994	11,261	(195)	17,649	$ 398	14,596	2,686	(31)
Beginning balance (in shares) at Dec. 31, 2021							9
Beginning balance at Dec. 31, 2021	32,276	5,279	11,950	10,929	(237)	17,234	$ 398	14,153	2,724	(41)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,566					1,851
Ending balance (in shares) at Sep. 30, 2022							9
Ending balance at Sep. 30, 2022	35,476	5,417	13,657	12,374	(157)	18,657	$ 398	14,966	3,307	(14)
Beginning balance (in shares) at Mar. 31, 2022							9
Beginning balance at Mar. 31, 2022	32,629	5,286	11,994	11,261	(195)	17,649	$ 398	14,596	2,686	(31)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						608			608
Capital contributions from parent company						46		46
Other comprehensive income (loss)	11				11	16				16
Cash dividends on common stock	(723)			(723)		(422)			(422)
Ending balance (in shares) at Jun. 30, 2022							9
Ending balance at Jun. 30, 2022	33,013	5,288	12,033	11,645	(184)	17,897	$ 398	14,642	2,872	(15)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,487					858			858
Capital contributions from parent company						324		324
Other comprehensive income (loss)	28				28	1				1
Cash dividends on common stock	(741)			(741)		(423)			(423)
Ending balance (in shares) at Sep. 30, 2022							9
Ending balance at Sep. 30, 2022	$ 35,476	$ 5,417	$ 13,657	$ 12,374	$ (157)	$ 18,657	$ 398	$ 14,966	$ 3,307	$ (14)