COMMITMENTS, CONTINGENCIES AND GUARANTEES - CONTRACTUAL COMMITMENTS & ENVIRONMENTAL ISSUES (Details) $ in Millions	3 Months Ended
Mar. 31, 2026 USD ($)
Sempra Infrastructure \| Liquefied Natural Gas Contracts
Loss Contingencies [Line Items]
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of year	$ (122)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	(55)
Increase (decrease) in unrecorded unconditional purchase obligation, year two	(12)
Increase (decrease) in unrecorded unconditional purchase obligation, year three	(14)
SoCalGas \| Natural Gas Contracts
Loss Contingencies [Line Items]
Increase in unrecorded unconditional purchase obligation	192
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of year	(24)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	16
Increase (decrease) in unrecorded unconditional purchase obligation, year two	21
Increase (decrease) in unrecorded unconditional purchase obligation, year three	22
Increase in unconditional purchase obligation, year four	22
Increase in unconditional purchase obligation, after year four	135
SDG&E \| Purchased-Power Contracts
Loss Contingencies [Line Items]
Increase in unrecorded unconditional purchase obligation	99
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of year	5
Increase (decrease) in unrecorded unconditional purchase obligation, year one	4
Increase (decrease) in unrecorded unconditional purchase obligation, year two	6
Increase (decrease) in unrecorded unconditional purchase obligation, year three	6
Increase in unconditional purchase obligation, year four	6
Increase in unconditional purchase obligation, after year four	$ 72

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Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, After Four Years

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Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Remainder of Fiscal Year

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Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year One

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Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Four

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Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Three

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Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Two

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