INVESTMENTS IN UNCONSOLIDATED ENTITIES - SUMMARY OF INVESTMENTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 18, 2021
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ 12,947	$ 12,440	$ 11,519
Other investments	1,525	1,388	2,103
Goodwill	1,602	1,602	1,602
Earnings (losses) recorded before income tax	614	294	30
Earnings recorded net of income tax	729	721	550
Total equity earnings	1,343	1,015	580
Distributions from investments	1,360	1,462	256
Total other equity method investments
Schedule of Equity Method Investments [Line Items]
Other investments	1,525	1,387	2,097
Other
Schedule of Equity Method Investments [Line Items]
Other investments	0	1	6
R B S Sempra Commodities
Schedule of Equity Method Investments [Line Items]
Total equity earnings	50	(100)
Sempra Texas Utilities
Schedule of Equity Method Investments [Line Items]
Distributions from investments	$ 688	$ 286	$ 246
Sempra Texas Utilities | Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee	100.00%	100.00%	100.00%
Equity method investment	$ 12,947	$ 12,440	$ 11,519
Difference between carrying amount of equity method investment and underlying equity	2,844	2,833	2,823
Goodwill	2,868	2,868	2,868
Equity method investment, difference between carrying amount and underlying equity, aoci	69	69	69
Difference between carrying amount and underlying equity, tax sharing liability	93	104	114
Earnings recorded net of income tax	$ 617	$ 577	$ 526
Sempra Texas Utilities | Sharyland Holdings, LP
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee	50.00%	50.00%	50.00%
Equity method investment	$ 100	$ 102	$ 100
Difference between carrying amount of equity method investment and underlying equity	42
Earnings (losses) recorded before income tax	5	3	2
Sempra Infrastructure
Schedule of Equity Method Investments [Line Items]
Distributions from investments	$ 672	1,176	2
Sempra Infrastructure | ESJ
Schedule of Equity Method Investments [Line Items]
Difference between carrying amount of equity method investment and underlying equity		$ 12	$ 12
Ownership percentage held by noncontrolling owners		50.00%		50.00%	50.00%
Sempra Infrastructure | Cameron LNG JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee	50.20%	50.20%	50.20%
Other investments	$ 514	$ 433	$ 1,256
Difference between carrying amount of equity method investment and underlying equity	276	259	263
Earnings (losses) recorded before income tax	$ 559	$ 391	$ 24
Sempra Infrastructure | ESJ JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee	0.00%	50.00%	50.00%
Other investments	$ 0	$ 34	$ 39
Earnings recorded net of income tax	$ 2	$ 5	$ 2
Sempra Infrastructure | IMG JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee	40.00%	40.00%	40.00%
Other investments	$ 523	$ 440	$ 337
Difference between carrying amount of equity method investment and underlying equity	5
Earnings recorded net of income tax	$ 83	$ 103	$ 9
Sempra Infrastructure | TAG JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee	50.00%	50.00%	50.00%
Other investments	$ 388	$ 378	$ 365
Difference between carrying amount of equity method investment and underlying equity	130
Earnings recorded net of income tax	27	36	13
Sempra Renewables
Schedule of Equity Method Investments [Line Items]
Distributions from investments	0	0	1
Sempra Renewables | Wind Assets
Schedule of Equity Method Investments [Line Items]
Earnings (losses) recorded before income tax	0	0	5
Parent and other
Schedule of Equity Method Investments [Line Items]
Distributions from investments	0	0	7
Parent and other | Other
Schedule of Equity Method Investments [Line Items]
Earnings (losses) recorded before income tax	0	0	(1)
Parent and other | R B S Sempra Commodities
Schedule of Equity Method Investments [Line Items]
Earnings (losses) recorded before income tax	$ 50	$ (100)	$ 0