v3.26.3
DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE INSTRUMENTS ON THE CONDENSED BALANCE SHEET (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Balance Sheet Location [Axis]: us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent    
Derivatives, Fair Value [Line Items]    
Derivative asset, Net amounts presented on the balance sheet $ 390 $ 271
Derivative asset, Additional cash collateral for commodity contracts not subject to rate recovery 69 38
Derivative assets, Total 459 309
Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities    
Derivatives, Fair Value [Line Items]    
Derivative liability, Net amounts presented on the balance sheet (23) (4)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative liabilities, Total (23) (4)
Balance Sheet Location [Axis]: us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent    
Derivatives, Fair Value [Line Items]    
Derivative liability, Net amounts presented on the balance sheet (8) (69)
Derivative liability, Additional cash collateral for commodity contracts not subject to rate recovery 0 0
Derivative liabilities, Total (8) (69)
Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivatives, Fair Value [Line Items]    
Derivative asset, Net amounts presented on the balance sheet 38 21
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery 32 23
Derivative assets, Total 70 44
Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivative asset, Net amounts presented on the balance sheet 13 9
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative assets, Total 13 9
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivative liability, Net amounts presented on the balance sheet (27) (62)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative liabilities, Total (27) (62)
Derivatives designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | Interest rate instruments    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 31 25
Derivatives designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | Foreign exchange instruments    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 0 0
Derivatives designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent | Interest rate instruments    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset 0 0
Derivatives designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent | Foreign exchange instruments    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset (2) (8)
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | Interest rate instruments    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset   242
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | Foreign exchange instruments    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 5  
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | Commodity contracts not subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 70 9
Derivative asset, subject to master netting arrangement, liability offset (3) (5)
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset (28) (10)
Derivative liability, subject to master netting arrangement, asset offset 5 2
Associated offsetting cash collateral 0 4
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent | Interest rate instruments    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 287  
Derivative liability, subject to master netting arrangement, before offset 0 0
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent | Foreign exchange instruments    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset 0  
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent | Commodity contracts not subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset (9) (66)
Derivative liability, subject to master netting arrangement, asset offset 3 5
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent | Foreign exchange instruments    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 33  
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 25 25
Derivative asset, subject to master netting arrangement, liability offset (20) (4)
Associated offsetting cash collateral 0 0
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 18 11
Derivative asset, subject to master netting arrangement, liability offset (5) (2)
Associated offsetting cash collateral 0 0
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent | Foreign exchange instruments    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset 0  
Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset (64) (134)
Derivative liability, subject to master netting arrangement, asset offset 20 4
Associated offsetting cash collateral 17 68
San Diego Gas and Electric Company | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative assets, Total 47 24
Derivative liabilities, Total 0 0
San Diego Gas and Electric Company | Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities    
Derivatives, Fair Value [Line Items]    
Derivative liability, Net amounts presented on the balance sheet 0 0
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative liabilities, Total 0 0
San Diego Gas and Electric Company | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivatives, Fair Value [Line Items]    
Derivative asset, Net amounts presented on the balance sheet 4 4
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery 31 13
Derivative assets, Total 35 17
San Diego Gas and Electric Company | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivative asset, Net amounts presented on the balance sheet 12 7
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative assets, Total 12 7
San Diego Gas and Electric Company | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivative liability, Net amounts presented on the balance sheet 0 0
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative liabilities, Total 0 0
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset (2) (5)
Derivative liability, subject to master netting arrangement, asset offset 2 1
Associated offsetting cash collateral 0 4
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 6 4
Derivative asset, subject to master netting arrangement, liability offset (2) 0
Associated offsetting cash collateral 0 0
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 14 8
Derivative asset, subject to master netting arrangement, liability offset (2) (1)
Associated offsetting cash collateral 0 0
San Diego Gas and Electric Company | Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset (6) (12)
Derivative liability, subject to master netting arrangement, asset offset 2 0
Associated offsetting cash collateral 4 12
Southern California Gas Company | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative assets, Total 3 29
Derivative liabilities, Total (50) (66)
Southern California Gas Company | Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities    
Derivatives, Fair Value [Line Items]    
Derivative liability, Net amounts presented on the balance sheet (23) (4)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative liabilities, Total (23) (4)
Southern California Gas Company | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Derivatives, Fair Value [Line Items]    
Derivative asset, Net amounts presented on the balance sheet 1 17
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery 1 10
Derivative assets, Total 2 27
Southern California Gas Company | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivatives, Fair Value [Line Items]    
Derivative asset, Net amounts presented on the balance sheet 1 2
Derivative asset, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative assets, Total 1 2
Southern California Gas Company | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Derivative liability, Net amounts presented on the balance sheet (27) (62)
Derivative liability, Additional cash collateral for commodity contracts subject to rate recovery 0 0
Derivative liabilities, Total (27) (62)
Southern California Gas Company | Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset (26) (5)
Derivative liability, subject to master netting arrangement, asset offset 3 1
Associated offsetting cash collateral 0 0
Southern California Gas Company | Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 19 21
Derivative asset, subject to master netting arrangement, liability offset (18) (4)
Associated offsetting cash collateral 0 0
Southern California Gas Company | Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative asset, subject to master netting arrangement, before offset 4 3
Derivative asset, subject to master netting arrangement, liability offset (3) (1)
Associated offsetting cash collateral 0 0
Southern California Gas Company | Derivatives not designated as hedging instruments: | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent | Commodity contracts subject to rate recovery    
Derivatives, Fair Value [Line Items]    
Derivative liability, subject to master netting arrangement, before offset (58) (122)
Derivative liability, subject to master netting arrangement, asset offset 18 4
Associated offsetting cash collateral $ 13 $ 56