SEGMENT INFORMATION - Revenue By Services (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Energy-related businesses	$ 381	$ 475
Revenues from contracts with customers	3,681	3,697
Revenues	3,802	3,640
Operating Segments After Reconciling Items And Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contracts with customers	3,681	3,698
Total other revenues	121	(57)
Operating Segments After Reconciling Items And Eliminations | Sempra California
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	3,457	3,474
Energy-related businesses	0	0
Revenues from contracts with customers	3,457	3,474
Utilities	(62)	(338)
Energy-related businesses	0	0
Total other revenues	(62)	(338)
Operating Segments After Reconciling Items And Eliminations | Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	26	30
Energy-related businesses	198	194
Revenues from contracts with customers	224	224
Utilities	0	0
Energy-related businesses	183	281
Total other revenues	183	281
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,827	3,660
Operating Segments | Sempra California
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contracts with customers	3,463	3,479
Revenues	3,401	3,141
Operating Segments | Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contracts with customers	244	242
Revenues	426	519
Adjustments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		(1)
Intersegment revenues and eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	(25)	(19)
Intersegment revenues and eliminations | Sempra California
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	(6)	(5)
Energy-related businesses	0	0
Revenues	(6)	(5)
Intersegment revenues and eliminations | Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	0	0
Energy-related businesses	(19)	(14)
Revenues	$ (19)	$ (14)