DEBT AND CREDIT FACILITIES - COMMITTED LINES OF CREDIT (Details) $ in Millions	Jun. 30, 2023 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 9,900
Line of credit outstanding	(1,436)
Available unused credit	7,398
Letter of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	(15)
Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(1,051)
Sempra
Line of Credit Facility [Line Items]
Maximum borrowing capacity	4,000
Line of credit outstanding	0
Available unused credit	3,187
Sempra | Letter of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Sempra | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(813)
San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500
Line of credit outstanding	0
Available unused credit	1,500
San Diego Gas and Electric Company | Letter of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
San Diego Gas and Electric Company | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Southern California Gas Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,200
Line of credit outstanding	0
Available unused credit	962
Southern California Gas Company | Letter of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Southern California Gas Company | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(238)
SI Partners
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,000
Line of credit outstanding	0
Available unused credit	1,000
SI Partners | Letter of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
SI Partners | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	0
IEnova And SI Partners | IEnova Committed Line Of Credit Due September 2023
Line of Credit Facility [Line Items]
Maximum borrowing capacity	350
Line of credit outstanding	(350)
Available unused credit	0
IEnova And SI Partners | IEnova Committed Line Of Credit Due September 2023 | Letter of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
IEnova And SI Partners | IEnova Committed Line Of Credit Due December 2023
Line of Credit Facility [Line Items]
Maximum borrowing capacity	150
Line of credit outstanding	0
Available unused credit	150
IEnova And SI Partners | IEnova Committed Line Of Credit Due December 2023 | Letter of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500
Line of credit outstanding	(1,086)
Available unused credit	414
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024 | Letter of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding	0
IEnova And SI Partners | Commercial paper | IEnova Committed Line Of Credit Due September 2023
Line of Credit Facility [Line Items]
Line of credit outstanding	0
IEnova And SI Partners | Commercial paper | IEnova Committed Line Of Credit Due December 2023
Line of Credit Facility [Line Items]
Line of credit outstanding	0
IEnova And SI Partners | Commercial paper | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Maximum borrowing capacity	200
Line of credit outstanding	0
Available unused credit	185
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due 2030 | Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	200
Line of credit outstanding	(15)
Port Arthur LNG | Commercial paper | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Line of credit outstanding	$ 0