DEBT AND CREDIT FACILITIES - SCHEDULES OF SUMMARIES OF LINES OF CREDIT (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Nov. 30, 2021
Line of Credit Facility [Line Items]
Total facility	$ 9,535,000,000
Line of credit outstanding	(749,000,000)
Available unused credit	6,760,000,000
Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(2,026,000,000)
Foreign Line of Credit
Line of Credit Facility [Line Items]
Total facility	470,000,000
Line of credit outstanding	(321,000,000)
Available unused credit	149,000,000
Letter of Credit
Line of Credit Facility [Line Items]
Long-term debt outstanding	682,000,000
Sempra Energy
Line of Credit Facility [Line Items]
Total facility	3,185,000,000
Line of credit outstanding	0
Available unused credit	1,945,000,000
Sempra Energy | Sempra Energy Line Of Credit Due May 2024
Line of Credit Facility [Line Items]
Total facility	1,250,000,000
Line of credit outstanding	0
Available unused credit	1,250,000,000
Sempra Energy | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(1,240,000,000)
Sempra Energy | Commercial paper | Sempra Energy Line Of Credit Due May 2024
Line of Credit Facility [Line Items]
Line of credit outstanding	0
San Diego Gas and Electric Company [Member]
Line of Credit Facility [Line Items]
Total facility	1,500,000,000
Line of credit outstanding	0
Available unused credit	1,099,000,000
San Diego Gas and Electric Company [Member] | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(401,000,000)
San Diego Gas and Electric Company [Member] | Letter of Credit
Line of Credit Facility [Line Items]
Long-term debt outstanding	15,000,000
SoCalGas
Line of Credit Facility [Line Items]
Total facility	750,000,000
Line of credit outstanding	0
Available unused credit	365,000,000
SoCalGas | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(385,000,000)
SoCalGas | Letter of Credit
Line of Credit Facility [Line Items]
Long-term debt outstanding	15,000,000
SI Partners
Line of Credit Facility [Line Items]
Total facility	1,000,000,000	$ 1,000,000,000
Line of credit outstanding	0
Available unused credit	1,000,000,000
SI Partners | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	0
IEnova | IEnova Committed Line Of Credit Due 2023
Line of Credit Facility [Line Items]
Total facility	350,000,000
Line of credit outstanding	(350,000,000)
Available unused credit	0
IEnova | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Total facility	1,500,000,000
Line of credit outstanding	(399,000,000)
Available unused credit	1,101,000,000
IEnova | Commercial paper | IEnova Committed Line Of Credit Due 2023
Line of Credit Facility [Line Items]
Line of credit outstanding	0
IEnova | Commercial paper | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Line of credit outstanding	0
Sempra Infrastructure | Letter of Credit
Line of Credit Facility [Line Items]
Long-term debt outstanding	473,000,000
Parent and Other | Letter of Credit
Line of Credit Facility [Line Items]
Long-term debt outstanding	179,000,000
Foreign Uncommitted Revolving Credit Facility September 2022 | IEnova | Foreign Line of Credit
Line of Credit Facility [Line Items]
Total facility	250,000,000
Line of credit outstanding	(250,000,000)
Available unused credit	$ 0
Foreign Uncommitted Revolving Credit Facility September 2022 | IEnova | Foreign Line of Credit | LIBOR
Line of Credit Facility [Line Items]
Variable percentage rate	0.10%
Foreign Uncommitted Revolving Credit Facility Due August 2023 | ECA LNG Phase 1 | Foreign Line of Credit
Line of Credit Facility [Line Items]
Total facility	$ 100,000,000
Line of credit outstanding	(63,000,000)
Available unused credit	$ 37,000,000
Foreign Uncommitted Revolving Credit Facility Due August 2023 | ECA LNG Phase 1 | Foreign Line of Credit | LIBOR
Line of Credit Facility [Line Items]
Variable percentage rate	1.05%
Foreign Uncommitted Revolving Credit Facility Due October 2023 | IEnova | Foreign Line of Credit
Line of Credit Facility [Line Items]
Total facility	$ 100,000,000
Line of credit outstanding	(8,000,000)
Available unused credit	$ 92,000,000
Foreign Uncommitted Revolving Credit Facility Due October 2023 | IEnova | Foreign Line of Credit | LIBOR
Line of Credit Facility [Line Items]
Variable percentage rate	0.52%
Foreign Uncommitted Revolving Credit Facility Due October 2023-2 | IEnova | Foreign Line of Credit
Line of Credit Facility [Line Items]
Total facility	$ 20,000,000
Line of credit outstanding	0
Available unused credit	$ 20,000,000