SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - NCI NARRATIVE (Details) - SI Partners and ConocoPhillips $ in Billions	Mar. 31, 2025 USD ($)
Port Arthur LNG
Noncontrolling Interest [Line Items]
Funding commitment, aggregate amount	$ 9.0
Funding commitment paid	$ 2.7
Port Arthur LNG
Noncontrolling Interest [Line Items]
Funding commitment (in percent)	110.00%
Guaranteed funding amount (in percent)	70.00%