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EMPLOYEE BENEFIT PLANS - EXPECTED BENEFIT PAYMENTS (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
2024 $ 245
2025 219
2026 218
2027 225
2028 211
2029-2033 1,080
Pension Plan | SDG&E  
Defined Benefit Plan Disclosure [Line Items]  
2024 60
2025 61
2026 57
2027 57
2028 59
2029-2033 289
Pension Plan | SoCalGas  
Defined Benefit Plan Disclosure [Line Items]  
2024 130
2025 132
2026 133
2027 129
2028 127
2029-2033 654
Other Postretirement Benefits Plan  
Defined Benefit Plan Disclosure [Line Items]  
2024 47
2025 46
2026 48
2027 45
2028 44
2029-2033 218
Other Postretirement Benefits Plan | SDG&E  
Defined Benefit Plan Disclosure [Line Items]  
2024 10
2025 10
2026 10
2027 10
2028 10
2029-2033 46
Other Postretirement Benefits Plan | SoCalGas  
Defined Benefit Plan Disclosure [Line Items]  
2024 34
2025 33
2026 33
2027 33
2028 32
2029-2033 $ 161