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, 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]
Consolidated Net Income						385			385
Capital contributions from parent company						443		443
Other comprehensive income	42				42	10				10
Cash dividends on common stock	(702)			(702)		(423)			(423)
Other	7		7	2
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]
Consolidated 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]
Consolidated Net Income						608			608
Capital contributions from parent company						46		46
Other comprehensive income	11				11	16				16
Cash dividends on common stock	(723)			(723)		(422)			(422)
Other	2		4
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]
Consolidated Net Income	1,487					858			858
Capital contributions from parent company						324		324
Other comprehensive income	28				28	1				1
Cash dividends on common stock	(741)			(741)		(423)			(423)
Other	(8)		(4)	(2)	(1)
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 Dec. 31, 2022							9
Beginning balance at Dec. 31, 2022	34,532	5,417	13,673	11,538	(167)	18,858	$ 398	15,626	2,846	(12)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated Net Income						296			296
Capital contributions from parent company						752		752
Other comprehensive income	(44)				(44)
Cash dividends on common stock	(742)			(742)		(464)			(464)
Other	0		2			1			1
Ending balance (in shares) at Mar. 31, 2023							9
Ending balance at Mar. 31, 2023	34,562	5,421	13,715	11,658	(211)	19,443	$ 398	16,378	2,679	(12)
Beginning balance (in shares) at Dec. 31, 2022							9
Beginning balance at Dec. 31, 2022	34,532	5,417	13,673	11,538	(167)	18,858	$ 398	15,626	2,846	(12)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated Net Income	3,053					1,547
Ending balance (in shares) at Sep. 30, 2023							9
Ending balance at Sep. 30, 2023	35,304	5,422	13,751	12,391	(130)	20,857	$ 398	17,467	3,002	(10)
Beginning balance (in shares) at Mar. 31, 2023							9
Beginning balance at Mar. 31, 2023	34,562	5,421	13,715	11,658	(211)	19,443	$ 398	16,378	2,679	(12)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated Net Income						471			471
Capital contributions from parent company						33		33
Other comprehensive income	43				43	1				1
Cash dividends on common stock	(764)			(764)		(464)			(464)
Other	0		2
Ending balance (in shares) at Jun. 30, 2023							9
Ending balance at Jun. 30, 2023	34,648	5,422	13,742	11,732	(168)	19,484	$ 398	16,411	2,686	(11)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated Net Income	1,432					780			780
Capital contributions from parent company						1,056		1,056
Other comprehensive income	38				38	1				1
Cash dividends on common stock	(765)			(765)		(464)			(464)
Other	(1)		(2)	2
Ending balance (in shares) at Sep. 30, 2023							9
Ending balance at Sep. 30, 2023	$ 35,304	$ 5,422	$ 13,751	$ 12,391	$ (130)	$ 20,857	$ 398	$ 17,467	$ 3,002	$ (10)