DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details)	6 Months Ended
	Jun. 30, 2022 USD ($) customer	Mar. 31, 2022 USD ($)	Feb. 28, 2022 USD ($)
Line of Credit [Line Items]
Maximum borrowing capacity	$ 9,535,000,000
Primary committed lines of credit | customer	7
Amount outstanding	$ (595,000,000)
Available unused credit	$ 8,898,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%
Uncommitted letters of credit outstanding	$ 730,000,000
Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding	(42,000,000)
Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding	730,000,000
Sempra Energy
Line of Credit [Line Items]
Maximum borrowing capacity	3,185,000,000
Amount outstanding	0
Available unused credit	3,143,000,000
Sempra Energy | Sempra Energy Line Of Credit Due May 2024
Line of Credit [Line Items]
Maximum borrowing capacity	1,250,000,000
Amount outstanding	0
Available unused credit	1,250,000,000
Sempra Energy | Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding	(42,000,000)
Sempra Energy | Commercial Paper | Sempra Energy Line Of Credit Due May 2024
Line of Credit [Line Items]
Commercial paper outstanding	0
San Diego Gas and Electric Company
Line of Credit [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%
San Diego Gas and Electric Company | Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding	$ 0
San Diego Gas and Electric Company | Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding	15,000,000
Southern California Gas Company
Line of Credit [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%
Southern California Gas Company | Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding	$ 0
Southern California Gas Company | Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding	20,000,000
SI Partners
Line of Credit [Line Items]
Maximum borrowing capacity	1,000,000,000
Amount outstanding	(285,000,000)
Available unused credit	$ 715,000,000
Debt covenant, ratio of adjusted net indebtedness to earnings	5.25
SI Partners | Commercial Paper
Line of Credit [Line Items]
Commercial paper outstanding	$ 0
IEnova | IEnova Committed Line Of Credit Due 2023
Line of Credit [Line Items]
Maximum borrowing capacity	350,000,000
Amount outstanding	(310,000,000)
Available unused credit	40,000,000
IEnova | IEnova Committed Line Of Credit Due 2024
Line of Credit [Line Items]
Maximum borrowing capacity	1,500,000,000
Amount outstanding	0
Available unused credit	1,500,000,000
IEnova | Commercial Paper | IEnova Committed Line Of Credit Due 2023
Line of Credit [Line Items]
Commercial paper outstanding	0
IEnova | Commercial Paper | IEnova Committed Line Of Credit Due 2024
Line of Credit [Line Items]
Commercial paper outstanding	0
Sempra Infrastructure | Foreign Unsecured Line of Credit
Line of Credit [Line Items]
Maximum borrowing capacity	570,000,000
Amount outstanding	(318,000,000)
Available unused credit	252,000,000
Sempra Infrastructure | Foreign Line of Credit | Foreign Uncommitted Revolving Credit Facility September 2022
Line of Credit [Line Items]
Maximum borrowing capacity	250,000,000
Amount outstanding	(250,000,000)
Available unused credit	0
Sempra Infrastructure | Foreign Line of Credit | Foreign Uncommitted Revolving Credit Facility Due October 2023
Line of Credit [Line Items]
Maximum borrowing capacity	100,000,000
Amount outstanding	(36,000,000)
Available unused credit	64,000,000
Sempra Infrastructure | Foreign Line of Credit | Foreign Uncommitted Revolving Credit Facility Due October 2023-2
Line of Credit [Line Items]
Maximum borrowing capacity	20,000,000
Amount outstanding	0
Available unused credit	20,000,000
Sempra Infrastructure | Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding	525,000,000
Sempra LNG | Foreign Line of Credit | Foreign Uncommitted Revolving Credit Facility Due August 2023
Line of Credit [Line Items]
Maximum borrowing capacity	200,000,000	$ 200,000,000	$ 100,000,000
Amount outstanding	(32,000,000)
Available unused credit	168,000,000
Parent and Other | Letter of Credit
Line of Credit [Line Items]
Uncommitted letters of credit outstanding	$ 170,000,000