INCOME TAXES - RECONCILIATION TO EFFECTIVE TAX RATE (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Line Items]
Income tax expense (benefit)	$ 99	$ 249	$ 315
Income from continuing operations before income taxes and equity earnings	219	1,489	1,734
Income (loss) from equity method investments	614	294	30
Pretax income	$ 833	$ 1,783	$ 1,764
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
Outside basis differences	9.00%	0.00%	0.00%
Depreciation	8.00%	3.00%	3.00%
Non-U.S. earnings taxed at lower statutory income tax rates	5.00%	2.00%	3.00%
Foreign exchange and inflation effects	1.00%	(3.00%)	4.00%
Valuation allowances	1.00%	(1.00%)	0.00%
Tax credits	0.00%	(1.00%)	(2.00%)
Excess deferred income taxes outside of ratemaking	0.00%	0.00%	(4.00%)
Compensation-related items	(1.00%)	(1.00%)	0.00%
Impairment losses	(1.00%)	1.00%	0.00%
Noncontrolling interests	(2.00%)	0.00%	0.00%
Allowance for equity funds used during construction	(3.00%)	(1.00%)	(1.00%)
Amortization of excess deferred income taxes	(3.00%)	(1.00%)	(1.00%)
Remeasurement of deferred taxes	(4.00%)	0.00%	0.00%
State income taxes, net of federal income tax benefit	(4.00%)	1.00%	2.00%
Self-developed software expenditures	(5.00%)	(3.00%)	(2.00%)
Utility repairs expenditures	(9.00%)	(4.00%)	(3.00%)
Other, net	(1.00%)	1.00%	(2.00%)
Effective income tax rate	12.00%	14.00%	18.00%
San Diego Gas and Electric Company [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Line Items]
Income tax expense (benefit)	$ 201	$ 190	$ 171
Income from continuing operations before income taxes and equity earnings	1,020	1,014	945
Pretax income	$ 1,020	$ 1,014	$ 945
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
Depreciation	3.00%	3.00%	3.00%
Excess deferred income taxes outside of ratemaking	0.00%	0.00%	(3.00%)
Allowance for equity funds used during construction	(2.00%)	(2.00%)	(1.00%)
Amortization of excess deferred income taxes	(2.00%)	(1.00%)	(1.00%)
State income taxes, net of federal income tax benefit	5.00%	5.00%	6.00%
Self-developed software expenditures	(1.00%)	(4.00%)	(3.00%)
Utility repairs expenditures	(4.00%)	(3.00%)	(3.00%)
Other, net	0.00%	0.00%	(1.00%)
Effective income tax rate	20.00%	19.00%	18.00%
SoCalGas
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Line Items]
Income tax expense (benefit)	$ (310)	$ 96	$ 120
Income from continuing operations before income taxes and equity earnings	(736)	601	762
Pretax income	$ (736)	$ 601	$ 762
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
Depreciation	(5.00%)	5.00%	4.00%
Excess deferred income taxes outside of ratemaking	0.00%	0.00%	(5.00%)
Allowance for equity funds used during construction	1.00%	(1.00%)	(1.00%)
Amortization of excess deferred income taxes	2.00%	(1.00%)	(1.00%)
State income taxes, net of federal income tax benefit	11.00%	2.00%	4.00%
Self-developed software expenditures	5.00%	(4.00%)	(2.00%)
Utility repairs expenditures	5.00%	(7.00%)	(4.00%)
Other, net	2.00%	(1.00%)	0.00%
Nondeductible expenditures	0.00%	2.00%	0.00%
Effective income tax rate	42.00%	16.00%	16.00%

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