REGULATORY MATTERS - FERC Rate Matters (Details) - San Diego Gas and Electric Company	1 Months Ended
Oct. 31, 2019
Public Utilities, General Disclosures [Line Items]
Minimum common equity ratio (as a percent)	10.60%
FERC requirement to maintain common equity ratio at or above, base (as a percent)	10.10%
FERC requirement, additional basis spread	0.50%

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