COMMITMENTS, CONTINGENCIES AND GUARANTEES - CONTRACTUAL COMMITMENTS & ENVIRONMENTAL ISSUES (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($)
Southern California Gas Company \| Natural Gas Contracts
Loss Contingencies [Line Items]
Increase in unrecorded unconditional purchase obligation	$ 616
Increase (decrease) in unrecorded unconditional purchase obligation, year one	52
Increase (decrease) in unrecorded unconditional purchase obligation, year two	65
Increase (decrease) in unrecorded unconditional purchase obligation, year three	77
Increase in unconditional purchase obligation, year four	79
Increase in unconditional purchase obligation, after year four	343
San Diego Gas and Electric Company \| Purchased-Power Contracts
Loss Contingencies [Line Items]
Increase in unrecorded unconditional purchase obligation	115
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of year	21
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
Sempra Infrastructure \| Liquefied Natural Gas Contracts
Loss Contingencies [Line Items]
Increase (decrease) in unrecorded unconditional purchase obligation, remainder of year	(347)
Increase (decrease) in unrecorded unconditional purchase obligation, year one	1
Increase (decrease) in unrecorded unconditional purchase obligation, year two	131
Increase (decrease) in unrecorded unconditional purchase obligation, year three	$ 81

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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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