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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

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