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COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
SDG&E      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
Variable payments, due in 2023 $ 297    
Variable payments, due in 2024 297    
Variable payments, due in 2025 296    
Variable payments, due in 2026 290    
Variable payments, due in 2027 289    
Variable payments, due thereafter 2,496    
Storage and transportation      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 202    
2024 184    
2025 144    
2026 141    
2027 138    
Thereafter 795    
Total minimum payments 1,604    
Natural Gas      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 139    
2024 49    
2025 31    
2026 0    
2027 0    
Thereafter 0    
Total minimum payments 219    
Natural Gas | SoCalGas      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 4    
2024 22    
2025 21    
2026 0    
2027 0    
Thereafter 0    
Total minimum payments 47    
Natural Gas Contracts      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 341    
2024 233    
2025 175    
2026 141    
2027 138    
Thereafter 795    
Total minimum payments 1,823    
Payments 2,536 $ 1,691 $ 989
Natural Gas Contracts | SoCalGas      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 136    
2024 136    
2025 98    
2026 75    
2027 72    
Thereafter 240    
Total minimum payments 757    
Payments 2,492 1,590 935
Transportation | SoCalGas      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 132    
2024 114    
2025 77    
2026 75    
2027 72    
Thereafter 240    
Total minimum payments 710    
Liquefied Natural Gas Contracts | Sempra Infrastructure      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 1,068    
2024 797    
2025 802    
2026 796    
2027 787    
Thereafter 1,307    
Total minimum payments 5,557    
Payments 108 27 16
Purchased-Power Contracts      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 175    
2024 150    
2025 95    
2026 91    
2027 73    
Thereafter 578    
Total minimum payments 1,162    
Purchased-Power Contracts | SDG&E      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 175    
2024 150    
2025 95    
2026 91    
2027 73    
Thereafter 578    
Total minimum payments 1,162    
Variable payments, due in 2023 77    
Variable payments, due in 2024 77    
Variable payments, due in 2025 77    
Variable payments, due in 2026 77    
Variable payments, due in 2027 77    
Variable payments, due thereafter 564    
Payments 484 $ 495 $ 534
Infrastructure Construction And Improvements      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 87    
2024 24    
2025 20    
2026 20    
2027 19    
Thereafter 71    
Total minimum payments 241    
Infrastructure Construction And Improvements | SDG&E      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 10    
2024 1    
2025 1    
2026 1    
2027 2    
Thereafter 18    
Construction projects, payable 33    
Infrastructure Construction And Improvements | Sempra Infrastructure      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 73    
2024 19    
2025 17    
2026 17    
2027 17    
Thereafter 53    
Total minimum payments 196    
Infrastructure Improvements For Natural Gas And Electric Transmission And Distribution | SDG&E      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
Construction projects, payable 8    
Nuclear Plant Maintenance | San Diego Gas and Electric Company      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
Construction projects, payable 25    
Information Technology Software Project | SoCalGas      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
2023 4    
2024 4    
2025 2    
2026 2    
Construction projects, payable 12    
Refined products terminals | Sempra Infrastructure      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
Total minimum payments 16    
Natural Gas Pipelines and Ongoing Maintenance Services | Sempra Infrastructure      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
Total minimum payments 174    
Renewables Projects | Sempra Infrastructure      
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]      
Total minimum payments $ 6