GENERAL INFORMATION AND OTHER FINANCIAL DATA - CREDIT LOSSES (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	$ 1,706			$ 1,977
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	136	$ 138
Provisions for expected credit losses	111	96
Write-offs	(57)	(28)
Ending balance	190	206
Allowance for credit losses	7			8
Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	151			94
Accounts receivable – other, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	28			19
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	37			39
Other long-term assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	25			70
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Expected credit losses, noncurrent	2			3
Other long-term assets | KKR
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Expected credit losses, noncurrent	7			8
Due from Unconsolidated Affiliates - Noncurrent
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses				1
Deferred Credits and Other | Sempra LNG
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses	6			7
San Diego Gas and Electric Company
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	819			751
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	66	69
Provisions for expected credit losses	51	30
Write-offs	(30)	(16)
Ending balance	87	83
San Diego Gas and Electric Company | Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	64			42
San Diego Gas and Electric Company | Accounts receivable – other, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	11			9
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	22			22
San Diego Gas and Electric Company | Other long-term assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	13			25
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Expected credit losses, noncurrent	1			2
Southern California Gas Company
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	739			1,139
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	69	68
Provisions for expected credit losses	58	64
Write-offs	(27)	(12)
Ending balance	100	$ 120
Southern California Gas Company | Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	84			51
Southern California Gas Company | Accounts receivable – other, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	17			10
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	15			17
Southern California Gas Company | Other long-term assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	12			45
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Expected credit losses, noncurrent	$ 1			1
Customers Under California Arrearage Payment Program | San Diego Gas and Electric Company
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers			$ 51	63
Customers Under California Arrearage Payment Program | Southern California Gas Company
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers			$ 59	$ 79