SEGMENT INFORMATION - Schedule of Segment Information Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024		Jun. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
ASSETS	$ 106,919	$ 96,155	[1]
EQUITY METHOD INVESTMENTS	17,181	17,933
Disposal Group Held-for-sale | SI Partners
Revenues from External Customers and Long-Lived Assets [Line Items]
Equity method investment, held for sale	2,471
Sempra Texas Utilities
Revenues from External Customers and Long-Lived Assets [Line Items]
EQUITY METHOD INVESTMENTS	17,164	15,522
Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
EQUITY METHOD INVESTMENTS	17	2,411
Sempra Infrastructure | Cameron LNG JV | Deferred Credits and Other | Promissory Note for SDSRA Distribution | Corporate Joint Venture
Revenues from External Customers and Long-Lived Assets [Line Items]
Guarantees, carrying value	17			$ 22
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
ASSETS	106,792	94,604
Operating Segments | Sempra California
Revenues from External Customers and Long-Lived Assets [Line Items]
ASSETS	59,479	56,116
Operating Segments | Sempra Texas Utilities
Revenues from External Customers and Long-Lived Assets [Line Items]
ASSETS	17,173	15,534
Operating Segments | Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
ASSETS	30,140	22,954
Parent and other
Revenues from External Customers and Long-Lived Assets [Line Items]
ASSETS	1,162	2,622
Intersegment eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
ASSETS	$ (1,035)	$ (1,071)

[1] Derived from audited financial statements.