SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - NONCONTROLLING INTEREST NARRATIVE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Noncontrolling Interest [Line Items]
Contributions from noncontrolling interests	$ 41	$ 34
SI Partners and ConocoPhillips | Port Arthur LNG I
Noncontrolling Interest [Line Items]
Funding commitment, aggregate amount	9,000
SI Partners | Port Arthur LNG I
Noncontrolling Interest [Line Items]
Funding commitment paid	$ 2,700
Port Arthur LNG I | SI Partners and ConocoPhillips
Noncontrolling Interest [Line Items]
Funding commitment (in percent)	110.00%
Port Arthur LNG I | SI Partners
Noncontrolling Interest [Line Items]
Guaranteed funding amount (in percent)	70.00%
Sempra Infrastructure
Noncontrolling Interest [Line Items]
Distributions to Noncontrolling Interests	$ 65	38
Contributions from noncontrolling interests	$ 41	$ 34