GENERAL INFORMATION AND OTHER FINANCIAL DATA - CREDIT LOSSES (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	$ 1,670		$ 1,977
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	136	$ 138
Provisions for expected credit losses	77	66
Write-offs	(36)	(12)
Ending balance	177	192
Allowance for credit losses	7		8
Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	142		94
Accounts receivable – other, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	13		19
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	33		39
Other long-term assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	32		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	716		751
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	66	69
Provisions for expected credit losses	37	13
Write-offs	(18)	(7)
Ending balance	85	75
San Diego Gas and Electric Company | Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	62		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	17		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	37	52
Write-offs	(18)	(5)
Ending balance	88	$ 115
Southern California Gas Company | Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	76		51
Southern California Gas Company | Accounts receivable – other, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	2		10
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	11		17
Southern California Gas Company | Other long-term assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivables from revenues from contracts with customers	15		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			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			$ 79