Regulatory Matters - GPC Integrated Resource Plan (Details) - GEORGIA POWER CO	3 Months Ended
Mar. 31, 2022 MW
Public Utilities, General Disclosures [Line Items]
Approved capacity increase (in MWs)	970
Service date extension term	1 year

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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