SEGMENT INFORMATION - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($) segment	Dec. 31, 2024 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments	3
Number of reportable segments	3
ASSETS | $	$ 106,919	$ 96,155	[1]
Oncor Electric Delivery Company LLC. | Sempra Texas Utilities
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	80.25%
SI Partners | Sempra Infrastructure
Segment Reporting Information [Line Items]
Ownership interest (as a percent)	70.00%
SDG&E
Segment Reporting Information [Line Items]
Number of operating segments	1
Number of reportable segments	1
ASSETS | $	$ 32,839	30,773	[2]
SoCalGas
Segment Reporting Information [Line Items]
Number of operating segments	1
Number of reportable segments	1
ASSETS | $	$ 26,653	$ 25,358	[3]

[1] Derived from audited financial statements.

[2] Derived from audited financial statements.

[3] Derived from audited financial statements.