DEBT AND CREDIT FACILITIES - COMMITTED LINES OF CREDIT (Details)			12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 30, 2022	Dec. 31, 2022 USD ($) lineOfCredit lender	Dec. 29, 2022
Line of Credit Facility [Line Items]
Total facility	$ 9,700,000,000		$ 9,700,000,000
Primary committed lines of credit | lineOfCredit			7
Line of credit outstanding	(1,744,000,000)		$ (1,744,000,000)
Available unused credit	7,197,000,000		$ 7,197,000,000
Number of lenders | lender			23
Lenders, percent of facility			6.00%
Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(759,000,000)		$ (759,000,000)
Sempra Energy
Line of Credit Facility [Line Items]
Total facility	4,000,000,000		4,000,000,000
Line of credit outstanding	0		0
Available unused credit	3,546,000,000		3,546,000,000
Committed lines of credit, capacity for issuance of letters of credit	200,000,000		200,000,000
Line of credit, increase limit	500,000,000		500,000,000
Sempra Energy | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(454,000,000)		(454,000,000)
San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Total facility	1,500,000,000		1,500,000,000
Line of credit outstanding	0		0
Available unused credit	1,295,000,000		1,295,000,000
Committed lines of credit, capacity for issuance of letters of credit	100,000,000		100,000,000
Line of credit, increase limit	250,000,000		250,000,000
San Diego Gas and Electric Company | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(205,000,000)		(205,000,000)
SoCalGas
Line of Credit Facility [Line Items]
Total facility	1,200,000,000		1,200,000,000
Line of credit outstanding	0		0
Available unused credit	1,100,000,000		1,100,000,000
Committed lines of credit, capacity for issuance of letters of credit	150,000,000		150,000,000
Line of credit, increase limit	250,000,000		250,000,000
SoCalGas | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	(100,000,000)		(100,000,000)
SI Partners
Line of Credit Facility [Line Items]
Total facility	1,000,000,000		1,000,000,000
Line of credit outstanding	(510,000,000)		(510,000,000)
Available unused credit	490,000,000		$ 490,000,000
Number of lenders | lender			12
Lenders, percent of facility			8.33%
Committed lines of credit, capacity for issuance of letters of credit	$ 200,000,000		$ 200,000,000
Maximum adjustment EBITDA allowed	5.25		5.25
SI Partners | Commercial paper
Line of Credit Facility [Line Items]
Line of credit outstanding	$ 0		$ 0
SI Partners | Swingline Sub-Limit
Line of Credit Facility [Line Items]
Line of credit outstanding	(100,000,000)		$ (100,000,000)
IEnova And SI Partners
Line of Credit Facility [Line Items]
Primary committed lines of credit | lineOfCredit			3
IEnova And SI Partners | IEnova Committed Line Of Credit Due September 2023
Line of Credit Facility [Line Items]
Total facility	350,000,000		$ 350,000,000
Line of credit outstanding	(264,000,000)		(264,000,000)
Available unused credit	86,000,000		86,000,000
IEnova And SI Partners | IEnova Committed Line Of Credit Due December 2023
Line of Credit Facility [Line Items]
Total facility	150,000,000		150,000,000
Line of credit outstanding	0		0
Available unused credit	150,000,000		150,000,000
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Line of credit outstanding	(970,000,000)		(970,000,000)
Available unused credit	$ 530,000,000		530,000,000
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024 | LIBOR
Line of Credit Facility [Line Items]
Variable percentage rate	1.05%
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		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		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		0
IEnova And SI Partners | Line of Credit [Member] | IEnova Committed Line Of Credit Due September 2023 | Credit Line Shared By IEnova And SI Partners
Line of Credit Facility [Line Items]
Total facility	350,000,000		350,000,000
IEnova And SI Partners | Line of Credit [Member] | IEnova Committed Line Of Credit Due September 2023 | LIBOR | Credit Line Shared By IEnova And SI Partners
Line of Credit Facility [Line Items]
Variable percentage rate				0.54%
IEnova And SI Partners | Line of Credit [Member] | IEnova Committed Line Of Credit Due September 2023 | Secured Overnight Financing Rate (SOFR) | Credit Line Shared By IEnova And SI Partners
Line of Credit Facility [Line Items]
Variable percentage rate		0.64%
IEnova And SI Partners | Line of Credit [Member] | IEnova Committed Line Of Credit Due December 2023 | Credit Line Shared By IEnova And SI Partners
Line of Credit Facility [Line Items]
Total facility	150,000,000		$ 150,000,000
IEnova And SI Partners | Line of Credit [Member] | IEnova Committed Line Of Credit Due December 2023 | LIBOR | Credit Line Shared By IEnova And SI Partners
Line of Credit Facility [Line Items]
Variable percentage rate			0.70%
IEnova And SI Partners | Line of Credit [Member] | IEnova Committed Line Of Credit Due 2024 | Credit Line Shared By IEnova And SI Partners
Line of Credit Facility [Line Items]
Total facility	$ 1,500,000,000		$ 1,500,000,000
Number of lenders | lender			10
IEnova And SI Partners | Line of Credit [Member] | IEnova Committed Line Of Credit Due 2024 | LIBOR | Credit Line Shared By IEnova And SI Partners
Line of Credit Facility [Line Items]
Variable percentage rate				0.80%
IEnova And SI Partners | Line of Credit [Member] | IEnova Committed Line Of Credit Due 2024 | Secured Overnight Financing Rate (SOFR) | Credit Line Shared By IEnova And SI Partners
Line of Credit Facility [Line Items]
Variable percentage rate		0.90%
Sempra U.S.
Line of Credit Facility [Line Items]
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%		65.00%
IEnova | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Total facility	$ 1,500,000,000		$ 1,500,000,000