SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - OTHER NONCONTROLLING INTERESTS (Details) - USD ($) $ in Millions	Dec. 31, 2021	Oct. 01, 2021	Dec. 31, 2020	Dec. 31, 2019
Noncontrolling Interest [Line Items]
Other noncontrolling interests	$ 1,418		$ 1,541	$ 1,856
SI Partners | Sempra Infrastructure
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners	20.00%	0.20%
Other noncontrolling interests	$ 1,384		0	0
SI Partners Subsidiaries | Sempra Infrastructure
Noncontrolling Interest [Line Items]
Other noncontrolling interests	$ 34		$ 1,540	$ 1,622
SI Partners Subsidiaries | Sempra Infrastructure | Minimum
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners	0.10%		17.50%	10.00%
SI Partners Subsidiaries | Sempra Infrastructure | Maximum
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners	16.60%		29.80%	46.30%
PXISE Energy Solutions LLC | Corporate and Other
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners			20.00%	20.00%
Other noncontrolling interests	$ 0		$ 1	$ 1
Chilquinta Energia subsidiaries | Discontinued Operations, Held-for-sale
Noncontrolling Interest [Line Items]
Other noncontrolling interests	0		0	$ 23
Chilquinta Energia subsidiaries | Discontinued Operations, Held-for-sale | Minimum
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners				19.70%
Chilquinta Energia subsidiaries | Discontinued Operations, Held-for-sale | Maximum
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners				43.40%
Luz del Sur | Discontinued Operations, Held-for-sale
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners				16.40%
Other noncontrolling interests	0		0	$ 205
Tecsur | Discontinued Operations, Held-for-sale
Noncontrolling Interest [Line Items]
Ownership percentage held by noncontrolling owners				9.80%
Other noncontrolling interests	$ 0		$ 0	$ 5