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EMPLOYEE BENEFIT PLANS - FAIR VALUE MEASUREMENTS, INVESTMENT ASSETS OF PENSION PLANS (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,390 $ 3,182 $ 3,002
Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 670 859 819
Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,535 2,095 1,969
Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 185 228  
Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,096 1,408 1,399
Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 147 197 213
Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 923 1,178 $ 1,159
Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 26 33  
Level 1 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 385 521  
Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 892 1,289  
Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 108 137  
Level 1 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 96 138  
Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 306 441  
Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13 19  
Level 2 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 68 98  
Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 267 420  
Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15 22  
Level 2 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 11  
Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 400 488  
Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4 6  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 453 619  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,159 1,709  
Fair Value, Inputs, Level 1, 2 and 3 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 123 159  
Fair Value, Inputs, Level 1, 2 and 3 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 105 149  
Fair Value, Inputs, Level 1, 2 and 3 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 706 929  
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 17 25  
Cash and cash equivalents | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 3  
Cash and cash equivalents | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 14  
Cash and cash equivalents | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Cash and cash equivalents | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 2  
Cash and cash equivalents | Level 1 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 3  
Cash and cash equivalents | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 14  
Cash and cash equivalents | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Cash and cash equivalents | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 2  
Cash and cash equivalents | Level 2 | Pension Plan | San Diego Gas and Electric Company      
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 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 | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 80 155  
Equity Securities, Domestic | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 313 660  
Equity Securities, Domestic | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 17 34  
Equity Securities, Domestic | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 16  
Equity Securities, Domestic | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 46 84  
Equity Securities, Domestic | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 9  
Equity Securities, Domestic | Level 1 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 79 154  
Equity Securities, Domestic | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 311 656  
Equity Securities, Domestic | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 17 34  
Equity Securities, Domestic | Level 1 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10 16  
Equity Securities, Domestic | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 46 83  
Equity Securities, Domestic | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 9  
Equity Securities, Domestic | Level 2 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 1  
Equity Securities, Domestic | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 4  
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 | San Diego Gas and Electric Company      
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 1  
Equity Securities, Domestic | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity Securities, International | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 40 70  
Equity Securities, International | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 158 300  
Equity Securities, International | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 15  
Equity Securities, International | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 7  
Equity Securities, International | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 24 37  
Equity Securities, International | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 6  
Equity Securities, International | Level 1 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 40 70  
Equity Securities, International | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 158 299  
Equity Securities, International | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 15  
Equity Securities, International | Level 1 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 7  
Equity Securities, International | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 24 37  
Equity Securities, International | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 6  
Equity Securities, International | Level 2 | Pension Plan | San Diego Gas and Electric Company      
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 1  
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 | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 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  
Equity Securities, Registered Investment Company Domestic | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 37 41  
Equity Securities, Registered Investment Company Domestic | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 144 175  
Equity Securities, Registered Investment Company Domestic | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 9  
Equity Securities, Registered Investment Company Domestic | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 65 83  
Equity Securities, Registered Investment Company Domestic | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 152 147  
Equity Securities, Registered Investment Company Domestic | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Equity Securities, Registered Investment Company Domestic | Level 1 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 35 37  
Equity Securities, Registered Investment Company Domestic | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 137 158  
Equity Securities, Registered Investment Company Domestic | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 9  
Equity Securities, Registered Investment Company Domestic | Level 1 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 65 82  
Equity Securities, Registered Investment Company Domestic | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 80 74  
Equity Securities, Registered Investment Company Domestic | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Equity Securities, Registered Investment Company Domestic | Level 2 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 4  
Equity Securities, Registered Investment Company Domestic | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 17  
Equity Securities, Registered Investment Company Domestic | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity Securities, Registered Investment Company Domestic | Level 2 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 1  
Equity Securities, Registered Investment Company Domestic | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 72 73  
Equity Securities, Registered Investment Company Domestic | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity Securities, Registered Investment Company International | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 6  
Equity Securities, Registered Investment Company International | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 20 26  
Equity Securities, Registered Investment Company International | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 1  
Equity Securities, Registered Investment Company International | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 9  
Equity Securities, Registered Investment Company International | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 3  
Equity Securities, Registered Investment Company International | Level 1 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5 6  
Equity Securities, Registered Investment Company International | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 20 26  
Equity Securities, Registered Investment Company International | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 1  
Equity Securities, Registered Investment Company International | Level 1 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 9  
Equity Securities, Registered Investment Company International | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 3  
Equity Securities, Registered Investment Company International | Level 2 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity Securities, Registered Investment Company International | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity Securities, Registered Investment Company International | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity Securities, Registered Investment Company International | Level 2 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity Securities, Registered Investment Company International | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Domestic government and government agencies | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 227 255  
Domestic government and government agencies | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 278 155  
Domestic government and government agencies | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 75 77  
Domestic government and government agencies | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11 25  
Domestic government and government agencies | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 165 258  
Domestic government and government agencies | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 3  
Domestic government and government agencies | Level 1 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 224 251  
Domestic government and government agencies | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 261 136  
Domestic government and government agencies | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 72 76  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9 24  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 151 241  
Domestic government and government agencies | Level 1 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Domestic government and government agencies | Level 2 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 4  
Domestic government and government agencies | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 17 19  
Domestic government and government agencies | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 1  
Domestic government and government agencies | Level 2 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 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 17  
Domestic government and government agencies | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 1  
International government bonds | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
International government bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 8  
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 9 12  
International government bonds | Level 1 | Pension Plan | San Diego Gas and Electric Company      
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 1 1  
International government bonds | Level 2 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
International government bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 8  
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 8 11  
Domestic corporate bonds | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 52 75  
Domestic corporate bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 204 321  
Domestic corporate bonds | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11 17  
Domestic corporate bonds | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 8  
Domestic corporate bonds | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 269 337  
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 | San Diego Gas and Electric Company      
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 | San Diego Gas and Electric Company      
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 | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 52 75  
Domestic corporate bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 204 321  
Domestic corporate bonds | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11 17  
Domestic corporate bonds | Level 2 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 6 8  
Domestic corporate bonds | Level 2 | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 269 337  
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 | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 12  
International corporate bonds | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 30 50  
International corporate bonds | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 3  
International corporate bonds | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
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 37 49  
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 | San Diego Gas and Electric Company      
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 | San Diego Gas and Electric Company      
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 | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 12  
International corporate bonds | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 30 50  
International corporate bonds | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 3  
International corporate bonds | Level 2 | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
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 37 49  
International corporate bonds | Level 2 | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Other | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (1)    
Other | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Other | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Other | Level 1 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (1)    
Other | Level 1 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (1)    
Other | Level 1 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   1  
Other | Level 2 | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Other | Level 2 | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1    
Other | Level 2 | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Accounts receivable/payable, net | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (1) (4)  
Accounts receivable/payable, net | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (7) (15)  
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 | San Diego Gas and Electric Company      
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 (4) (1)  
Investments measured at NAV: | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 210 233  
Investments measured at NAV: | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 355 356  
Investments measured at NAV: | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 60 68  
Investments measured at NAV: | Other Postretirement Benefits Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 42 49  
Investments measured at NAV: | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 218 244  
Investments measured at NAV: | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7 7  
Other | Pension Plan | San Diego Gas and Electric Company      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8 11  
Other | Pension Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 28 45  
Other | Pension Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 2  
Other | Other Postretirement Benefits Plan | SoCalGas      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3 6  
Other | Other Postretirement Benefits Plan | Other Sempra      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 1  
Total Sempra investment assets in the fair value hierarchy | Level 1 | Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,385 1,947  
Total Sempra investment assets in the fair value hierarchy | Level 1 | Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 415 598  
Total Sempra investment assets in the fair value hierarchy | Level 2 | Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 350 540  
Total Sempra investment assets in the fair value hierarchy | Level 2 | Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 413 $ 505