SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - CREDIT LOSSES (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2022
Valuation and Qualifying Accounts Disclosure [Line Items]
Accounts receivable, allowance for credit loss, writeoff		$ 116	$ 78	$ 47
Receivables from revenues from contracts with customers	$ 1,970	1,970	2,334
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		181	136	138
Provisions for expected credit losses	52	468	123	45
Write-offs		(116)	(78)	(47)
Ending balance	533	533	181	136
Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	480	480	140
Accounts receivable – other, net
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	15	15	25
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	52	52	40
Other long-term assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	0	0	9
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Other long-term assets	1	1	1
Other long-term assets | KKR
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Other long-term assets	6	6	7
Deferred Credits and Other | Sempra Infrastructure
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss related to guarantees	5	5	6
SDG&E
Valuation and Qualifying Accounts Disclosure [Line Items]
Accounts receivable, allowance for credit loss, writeoff		49	42	26
Receivables from revenues from contracts with customers	889	889	819
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		78	66	69
Provisions for expected credit losses		115	54	23
Write-offs		(49)	(42)	(26)
Ending balance	144	144	78	66
SDG&E | Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	116	116	52
SDG&E | Accounts receivable – other, net
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	13	13	12
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	27	27	25
SDG&E | Other long-term assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	0	0	6
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Other long-term assets	1	1	1
SoCalGas
Valuation and Qualifying Accounts Disclosure [Line Items]
Accounts receivable, allowance for credit loss, writeoff		67	36	21
Receivables from revenues from contracts with customers	987	987	1,311
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		98	69	68
Provisions for expected credit losses		300	65	22
Write-offs		(67)	(36)	(21)
Ending balance	331	331	98	$ 69
SoCalGas | Accounts receivable – trade, net
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	306	306	83
SoCalGas | Accounts receivable – other, net
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	2	2	13
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts receivable - trade and other, net	25	25	15
SoCalGas | Other long-term assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Receivables from revenues from contracts with customers	$ 0	$ 0	3
Customers Under California Arrearage Payment Program | SDG&E
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