SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - CREDIT LOSSES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2021
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	$ 2,334	$ 1,977
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	136	138	$ 29
Provisions for expected credit losses	123	45	124
Write-offs	(78)	(47)	(16)
Ending balance	181	136	138
KKR
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Note receivable issued				$ 300
Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	140	94
Accounts receivable – other, net
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	25	19
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	40	39
Other long-term assets(3)
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	9	70
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Other long-term assets	1	3
Other long-term assets(3) | KKR
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Other long-term assets	7	8
Due from Unconsolidated Affiliates - Noncurrent
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Financing receivable, allowance for credit loss		1
Deferred Credits and Other | Sempra Infrastructure
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss related to guarantees	6	7
Cumulative Effect, Period of Adoption, Adjustment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	0	1
Ending balance		0	0
San Diego Gas and Electric Company
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	819	751
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	66	69	14
Provisions for expected credit losses	54	23	65
Write-offs	(42)	(26)	(10)
Ending balance	78	66	69
San Diego Gas and Electric Company | Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	52	42
San Diego Gas and Electric Company | Accounts receivable – other, net
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	12	9
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	25	22
San Diego Gas and Electric Company | Other long-term assets(3)
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	6	25
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Other long-term assets	1	2
SoCalGas
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	1,311	1,139
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	69	68	15
Provisions for expected credit losses	65	22	59
Write-offs	(36)	(21)	(6)
Ending balance	98	69	$ 68
SoCalGas | Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	83	51
SoCalGas | Accounts receivable – other, net
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	13	10
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	15	17
SoCalGas | Other long-term assets(3)
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	3	45
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Other long-term assets	0	1
Customers Under California Arrearage Payment Program | San Diego Gas and Electric Company
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	51	63
Customers Under California Arrearage Payment Program | SoCalGas
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	$ 59	$ 79