FAIR VALUE MEASUREMENTS - Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Sempra Savings Plan 002
EBP, Investment, Fair Value and NAV [Line Items]
Total Master Trust investments	$ 558,441	$ 496,399
EBP Plans
EBP, Investment, Fair Value and NAV [Line Items]
Total Master Trust investments	5,951,845	5,607,355
EBP Plans \| Level 1 investments:
EBP, Investment, Fair Value and NAV [Line Items]
Total Master Trust investments	1,477,147	1,566,639
EBP Plans \| Level 1 investments: \| Sempra common stock
EBP, Investment, Fair Value and NAV [Line Items]
Total Master Trust investments	1,034,401	1,165,804
EBP Plans \| Level 1 investments: \| Mutual funds
EBP, Investment, Fair Value and NAV [Line Items]
Total Master Trust investments	442,746	400,835
EBP Plans \| Fair Value Measured at Net Asset Value Per Share \| Common/collective trusts
EBP, Investment, Fair Value and NAV [Line Items]
Total Master Trust investments	$ 4,474,698	$ 4,040,716

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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