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EMPLOYEE BENEFIT PLANS - FAIR VALUE MEASUREMENTS, INVESTMENT ASSETS OF PENSION PLANS (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 3,110 $ 2,935 $ 2,664
Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 807 787 726
Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,074 1,937 1,744
Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 229 211  
Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,273 1,185 1,169
Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 158 145 150
Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,080 1,008 $ 990
Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 35 32  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 505 378  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,418 718  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 151 111  
Fair Value, Inputs, Level 1, 2 and 3 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 128 97  
Fair Value, Inputs, Level 1, 2 and 3 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 724 638  
Fair Value, Inputs, Level 1, 2 and 3 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 20 10  
Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 148 297  
Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 610 464  
Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 61 91  
Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 90 91  
Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 169 171  
Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 5  
Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 357 81  
Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 808 254  
Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 90 20  
Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 38 6  
Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 555 467  
Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16 5  
Cash and cash equivalents | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Cash and cash equivalents | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 8  
Cash and cash equivalents | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Cash and cash equivalents | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Cash and cash equivalents | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Cash and cash equivalents | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 8  
Cash and cash equivalents | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Cash and cash equivalents | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Cash and cash equivalents | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Cash and cash equivalents | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Cash and cash equivalents | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Cash and cash equivalents | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, Domestic | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 9  
Equity securities, Domestic | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 23 27  
Equity securities, Domestic | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 2  
Equity securities, Domestic | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Equity securities, Domestic | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 5  
Equity securities, Domestic | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Equity securities, Domestic | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 9  
Equity securities, Domestic | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 23 27  
Equity securities, Domestic | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 2  
Equity securities, Domestic | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Equity securities, Domestic | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 5  
Equity securities, Domestic | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Equity securities, Domestic | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, Domestic | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, Domestic | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, Domestic | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, Domestic | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, Domestic | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Equity securities, International | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 5  
Equity securities, International | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13 14  
Equity securities, International | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Equity securities, International | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Equity securities, International | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 2  
Equity securities, International | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Equity securities, International | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 5  
Equity securities, International | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13 14  
Equity securities, International | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Equity securities, International | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Equity securities, International | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 2  
Equity securities, International | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Equity securities, International | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, International | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, International | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, International | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Equity securities, International | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity securities, International | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Registered investment companies - domestic | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 90 48  
Registered investment companies - domestic | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 203 149  
Registered investment companies - domestic | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 23 10  
Registered investment companies - domestic | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 83 74  
Registered investment companies - domestic | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 260 190  
Registered investment companies - domestic | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 4  
Registered investment companies - domestic | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 38 48  
Registered investment companies - domestic | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 85 149  
Registered investment companies - domestic | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 10  
Registered investment companies - domestic | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 77 74  
Registered investment companies - domestic | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 90 87  
Registered investment companies - domestic | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 4  
Registered investment companies - domestic | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 52 0  
Registered investment companies - domestic | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 118 0  
Registered investment companies - domestic | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13 0  
Registered investment companies - domestic | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 0  
Registered investment companies - domestic | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 170 103  
Registered investment companies - domestic | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 0  
Registered investment companies – International | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Registered investment companies – International | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 8  
Registered investment companies – International | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Registered investment companies – International | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 8  
Registered investment companies – International | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Registered investment companies – International | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic government and government agencies | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 100 232  
Domestic government and government agencies | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 512 287  
Domestic government and government agencies | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 48 80  
Domestic government and government agencies | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 8  
Domestic government and government agencies | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 83 88  
Domestic government and government agencies | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 1  
Domestic government and government agencies | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 88 227  
Domestic government and government agencies | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 486 270  
Domestic government and government agencies | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 77  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 8  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 66 74  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 0  
Domestic government and government agencies | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12 5  
Domestic government and government agencies | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 17  
Domestic government and government agencies | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 3  
Domestic government and government agencies | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 0  
Domestic government and government agencies | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 17 14  
Domestic government and government agencies | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
International government bonds | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11 3  
International government bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 25 9  
International government bonds | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
International government bonds | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
International government bonds | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15 10  
International government bonds | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International government bonds | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International government bonds | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International government bonds | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
International government bonds | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International government bonds | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11 3  
International government bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 25 9  
International government bonds | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
International government bonds | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
International government bonds | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15 10  
Domestic corporate bonds | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 256 65  
Domestic corporate bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 579 201  
Domestic corporate bonds | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 65 14  
Domestic corporate bonds | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 27 5  
Domestic corporate bonds | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 322 295  
Domestic corporate bonds | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12 4  
Domestic corporate bonds | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic corporate bonds | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic corporate bonds | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic corporate bonds | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic corporate bonds | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic corporate bonds | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic corporate bonds | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 256 65  
Domestic corporate bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 579 201  
Domestic corporate bonds | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 65 14  
Domestic corporate bonds | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 27 5  
Domestic corporate bonds | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 322 295  
Domestic corporate bonds | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12 4  
International corporate bonds | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 8  
International corporate bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 59 26  
International corporate bonds | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 2  
International corporate bonds | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
International corporate bonds | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 31 45  
International corporate bonds | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
International corporate bonds | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International corporate bonds | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International corporate bonds | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International corporate bonds | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International corporate bonds | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International corporate bonds | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
International corporate bonds | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 8  
International corporate bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 59 26  
International corporate bonds | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 2  
International corporate bonds | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
International corporate bonds | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 31 45  
International corporate bonds | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Derivative financial instruments | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 6  
Derivative financial instruments | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (2) (3)  
Derivative financial instruments | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Derivative financial instruments | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   (1)  
Derivative financial instruments | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Derivative financial instruments | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 6  
Derivative financial instruments | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (3) (4)  
Derivative financial instruments | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Derivative financial instruments | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   (1)  
Derivative financial instruments | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Derivative financial instruments | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Derivative financial instruments | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Derivative financial instruments | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Derivative financial instruments | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Derivative financial instruments | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Accounts receivable/payable, net | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (3) 3  
Accounts receivable/payable, net | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 22  
Accounts receivable/payable, net | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Accounts receivable/payable, net | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Accounts receivable/payable, net | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 9  
Accounts receivable/payable, net | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Investments measured at NAV – Common/collective trusts | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 305 406  
Investments measured at NAV – Common/collective trusts | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 650 1,197  
Investments measured at NAV – Common/collective trusts | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 78 99  
Investments measured at NAV – Common/collective trusts | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 30 21  
Investments measured at NAV – Common/collective trusts | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 353 361  
Investments measured at NAV – Common/collective trusts | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14 22  
Other | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   26  
Total investment assets in the fair value hierarchy | Level 1 | Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 819 852  
Total investment assets in the fair value hierarchy | Level 1 | Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 263 267  
Total investment assets in the fair value hierarchy | Level 2 | Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,255 355  
Total investment assets in the fair value hierarchy | Level 2 | Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 609 $ 478