DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details)	Mar. 31, 2022 USD ($)	Feb. 28, 2022 USD ($)	Nov. 30, 2021
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 9,535,000,000
Amount outstanding	(265,000,000)
Available unused credit	$ 7,766,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%
Letters of Credit Outstanding, Amount	$ 682,000,000
Sempra U.S. Businesses
Line of Credit Facility [Line Items]
Maximum borrowing capacity	9,500,000,000
Sempra Energy
Line of Credit Facility [Line Items]
Maximum borrowing capacity	3,185,000,000
Amount outstanding	0
Available unused credit	1,681,000,000
Sempra Global
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,250,000,000
Amount outstanding	0
Available unused credit	1,250,000,000
San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500,000,000
Amount outstanding	0
Available unused credit	$ 1,500,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%
Southern California Gas Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 750,000,000
Amount outstanding	0
Available unused credit	$ 750,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%
SI Partners
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 1,000,000,000
Amount outstanding	0
Available unused credit	1,000,000,000
Debt covenant, ratio of adjusted net indebtedness to earnings			5.25
IEnova | IEnova Committed Line Of Credit Due 2023
Line of Credit Facility [Line Items]
Maximum borrowing capacity	350,000,000
Amount outstanding	(265,000,000)
Available unused credit	85,000,000
IEnova | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Maximum borrowing capacity	1,500,000,000
Amount outstanding	0
Available unused credit	1,500,000,000
Commercial Paper
Line of Credit Facility [Line Items]
Commercial paper outstanding	(1,504,000,000)
Commercial Paper | Sempra Energy
Line of Credit Facility [Line Items]
Commercial paper outstanding	(1,504,000,000)
Commercial Paper | Sempra Global
Line of Credit Facility [Line Items]
Commercial paper outstanding	0
Commercial Paper | San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Commercial paper outstanding	0
Commercial Paper | Southern California Gas Company
Line of Credit Facility [Line Items]
Commercial paper outstanding	0
Commercial Paper | SI Partners
Line of Credit Facility [Line Items]
Commercial paper outstanding	0
Commercial Paper | IEnova | IEnova Committed Line Of Credit Due 2023
Line of Credit Facility [Line Items]
Commercial paper outstanding	0
Commercial Paper | IEnova | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Commercial paper outstanding	0
Foreign Unsecured Line of Credit | Sempra Infrastructure
Line of Credit Facility [Line Items]
Maximum borrowing capacity	570,000,000
Amount outstanding	(414,000,000)
Available unused credit	156,000,000
Letter of Credit
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	682,000,000
Letter of Credit | San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	15,000,000
Letter of Credit | Southern California Gas Company
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	15,000,000
Letter of Credit | Sempra Infrastructure
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	473,000,000
Letter of Credit | Parent and Other
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	179,000,000
Foreign Uncommitted Revolving Credit Facility September 2022 | Foreign Line of Credit | Sempra Infrastructure
Line of Credit Facility [Line Items]
Maximum borrowing capacity	250,000,000
Amount outstanding	(250,000,000)
Available unused credit	0
Foreign Uncommitted Revolving Credit Facility Due August 2023 | Foreign Line of Credit | Sempra LNG
Line of Credit Facility [Line Items]
Maximum borrowing capacity	200,000,000	$ 100,000,000
Amount outstanding	(64,000,000)
Available unused credit	136,000,000
Foreign Uncommitted Revolving Credit Facility Due October 2023 | Foreign Line of Credit | Sempra Infrastructure
Line of Credit Facility [Line Items]
Maximum borrowing capacity	100,000,000
Amount outstanding	(100,000,000)
Available unused credit	0
Foreign Uncommitted Revolving Credit Facility Due October 2023-2 | Foreign Line of Credit | Sempra Infrastructure
Line of Credit Facility [Line Items]
Maximum borrowing capacity	20,000,000
Amount outstanding	0
Available unused credit	$ 20,000,000