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EMPLOYEE BENEFIT PLANS - FAIR VALUE MEASUREMENTS, INVESTMENT ASSETS OF PENSION PLANS (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,935 $ 2,664 $ 2,390
Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 787 726 670
Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,937 1,744 1,535
Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 211 194  
Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,185 1,169 1,096
Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 145 150 147
Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,008 990 $ 923
Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 32 29  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 378 503  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 718 1,217  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 111 136  
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 97 110  
Fair Value, Inputs, Level 1, 2 and 3 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 638 749  
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 10 21  
Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 297 426  
Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 464 955  
Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 91 118  
Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 91 103  
Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 171 286  
Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 15  
Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 81 77  
Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 254 262  
Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 20 18  
Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 7  
Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 467 463  
Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 6  
Cash and cash equivalents | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 17  
Cash and cash equivalents | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 3  
Cash and cash equivalents | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   7  
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 7  
Cash and cash equivalents | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 17  
Cash and cash equivalents | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 3  
Cash and cash equivalents | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   7  
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 7  
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 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   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 9 103  
Equity securities, Domestic | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 27 354  
Equity securities, Domestic | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 23  
Equity securities, Domestic | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 8  
Equity securities, Domestic | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 57  
Equity securities, Domestic | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   7  
Equity securities, Domestic | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 103  
Equity securities, Domestic | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 27 353  
Equity securities, Domestic | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 22  
Equity securities, Domestic | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 8  
Equity securities, Domestic | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 57  
Equity securities, Domestic | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   7  
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 1  
Equity securities, Domestic | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 1  
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 5 40  
Equity securities, International | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14 137  
Equity securities, International | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 8  
Equity securities, International | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   3  
Equity securities, International | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 22  
Equity securities, International | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 3  
Equity securities, International | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 40  
Equity securities, International | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14 137  
Equity securities, International | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 8  
Equity securities, International | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   3  
Equity securities, International | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 22  
Equity securities, International | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 3  
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 0  
Registered investment companies – Domestic | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 48 41  
Registered investment companies – Domestic | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 149 142  
Registered investment companies – Domestic | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 8  
Registered investment companies – Domestic | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 74 71  
Registered investment companies – Domestic | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 190 181  
Registered investment companies – Domestic | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 3  
Registered investment companies – Domestic | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 48 41  
Registered investment companies – Domestic | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 149 141  
Registered investment companies – Domestic | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 8  
Registered investment companies – Domestic | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 74 71  
Registered investment companies – Domestic | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 87 78  
Registered investment companies – Domestic | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 3  
Registered investment companies – Domestic | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Registered investment companies – Domestic | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 1  
Registered investment companies – Domestic | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Registered investment companies – Domestic | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Registered investment companies – Domestic | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 103 103  
Registered investment companies – Domestic | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Registered investment companies – International | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 7  
Registered investment companies – International | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 7  
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 232 245  
Domestic government and government agencies | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 287 326  
Domestic government and government agencies | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 80 80  
Domestic government and government agencies | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 13  
Domestic government and government agencies | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 88 142  
Domestic government and government agencies | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 3  
Domestic government and government agencies | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 227 240  
Domestic government and government agencies | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 270 310  
Domestic government and government agencies | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 77 78  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 12  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 74 128  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 2  
Domestic government and government agencies | Level 2 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 5  
Domestic government and government agencies | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 17 16  
Domestic government and government agencies | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 2  
Domestic government and government agencies | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 1  
Domestic government and government agencies | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14 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 3 2  
International government bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 5  
International government bonds | Pension Plan | Other Sempra      
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 10 9  
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    
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 3 2  
International government bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 5  
International government bonds | Level 2 | Pension Plan | Other Sempra      
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 10 9  
Domestic corporate bonds | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 65 62  
Domestic corporate bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 201 212  
Domestic corporate bonds | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14 13  
Domestic corporate bonds | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 5  
Domestic corporate bonds | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 295 295  
Domestic corporate bonds | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 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 65 62  
Domestic corporate bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 201 212  
Domestic corporate bonds | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14 13  
Domestic corporate bonds | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 5  
Domestic corporate bonds | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 295 295  
Domestic corporate bonds | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 4  
International corporate bonds | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 8  
International corporate bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 27  
International corporate bonds | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
International corporate bonds | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
International corporate bonds | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 42  
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 8 8  
International corporate bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 27  
International corporate bonds | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
International corporate bonds | Level 2 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
International corporate bonds | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 45 42  
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 6 (15)  
Derivative financial instruments | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (3) 11  
Derivative financial instruments | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 (5)  
Derivative financial instruments | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (1) 2  
Derivative financial instruments | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 (6)  
Derivative financial instruments | Level 1 | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 (15)  
Derivative financial instruments | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (4) 11  
Derivative financial instruments | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 (5)  
Derivative financial instruments | Level 1 | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (1) 2  
Derivative financial instruments | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 (6)  
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 0  
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 0  
Derivative financial instruments | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Accounts receivable/payable, net | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
Accounts receivable/payable, net | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 22 (12)  
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 (2)  
Accounts receivable/payable, net | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 4  
Investments measured at NAV – Common/collective trusts | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 406 214  
Investments measured at NAV – Common/collective trusts | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,197 513  
Investments measured at NAV – Common/collective trusts | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 99 56  
Investments measured at NAV – Common/collective trusts | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 21 10  
Investments measured at NAV – Common/collective trusts | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 361 233  
Investments measured at NAV – Common/collective trusts | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 22 7  
Other | Pension Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   8  
Other | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   26  
Other | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   2  
Other | Other Postretirement Benefits Plan | SDG&E      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 32  
Other | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   4  
Other | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Total investment assets in the fair value hierarchy | Level 1 | Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 852 1,499  
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 267 404  
Total investment assets in the fair value hierarchy | Level 2 | Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 355 357  
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 $ 478 $ 476