SEGMENT INFORMATION - Revenue By Services (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Energy-related businesses	$ 1,831	$ 1,748	$ 2,891
Revenues from contracts with customers	12,418	11,818	14,848
Revenues	13,702	13,185	16,720
Operating Segments After Reconciling Items And Eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contracts with customers	12,418	11,818	14,849
Total other revenues	1,284	1,367	1,871
Operating Segments After Reconciling Items And Eliminations | Sempra California
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	11,429	10,985	13,668
Energy-related businesses	0	0	0
Revenues from contracts with customers	11,429	10,985	13,668
Utilities	364	374	75
Energy-related businesses	0	0	0
Total other revenues	364	374	75
Operating Segments After Reconciling Items And Eliminations | Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	78	78	87
Energy-related businesses	911	755	1,094
Revenues from contracts with customers	989	833	1,181
Utilities	0	0	0
Energy-related businesses	920	993	1,796
Total other revenues	920	993	1,796
Intersegment eliminations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	(81)	(79)	(112)
Intersegment eliminations | Sempra California
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	(25)	(23)	(18)
Energy-related businesses	0	0	0
Revenues	(25)	(23)	(18)
Intersegment eliminations | Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	0	0	0
Energy-related businesses	(56)	(56)	(94)
Revenues	(56)	(56)	(94)
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	13,783	13,264	16,832
Operating Segments | Sempra California
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contracts with customers	11,454	11,008	13,686
Revenues	11,818	11,382	13,761
Operating Segments | Sempra Infrastructure
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contracts with customers	1,052	896	1,251
Revenues	$ 1,965	$ 1,882	$ 3,071