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	Georgia Power Common Stock	Georgia Power Paid-In Capital	Georgia Power Retained Earnings (Accumulated Deficit)	Georgia Power Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		1,058					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	1,107					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		1,060					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, 2021		1,061					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	991					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		1,064					9
Ending balance at Mar. 31, 2022	$ 32,629	$ 5,286	$ 11,994	$ 11,261	$ (195)	$ 17,649	$ 398	$ 14,596	$ 2,686	$ (31)