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REVENUES - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended
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Dec. 31, 2024 | Nov. 30, 2024
Revenue from Contract with Customer [Abstract] |  |
Revenue, Change in Judgment, Revenue Recognition Period | 1 year | 3 years
Revenue, Change in Judgment, Increase in Revenue Due to Contract Modification | $ 107 |

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- Definition Revenue Modification, Additional Performance Obligations + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Revenue, Remaining Recognition Period + References No definition available. + Details
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Namespace Prefix: | sre_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration