Statements of Comprehensive Income (Loss) - GPC (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Qualifying hedges, change in fair value, tax	$ (16)	$ 3	$ (39)
Qualifying hedges, reclassification adjustment, tax	31	(13)	19
Georgia Power
Qualifying hedges, change in fair value, tax	0	(1)	(15)
Qualifying hedges, reclassification adjustment, tax	$ 2	$ 2	$ 1

Amount of tax expense (benefit) for reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e640-108580

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Data Type:	xbrli:monetaryItemType
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