INCOME TAXES - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021
Schedule of Effect of Changes in Legislation of Income Tax (Expense) [Line Items]
Income tax benefit related to outside differences on plans to sell businesses		$ 89
Income tax (benefit) expense related to increase in outside basis differences	$ (7)	51
Foreign undistributed earnings			$ 1,800
Undistributed earnings of foreign subsidiaries considered to be indefinitely reinvested			59
Foreign earnings repatriated	$ 4,700	254
San Diego Gas and Electric Company [Member]
Schedule of Effect of Changes in Legislation of Income Tax (Expense) [Line Items]
Release of regulatory liabilities		31
SoCalGas
Schedule of Effect of Changes in Legislation of Income Tax (Expense) [Line Items]
Release of regulatory liabilities		$ 38
Non-U.S.
Schedule of Effect of Changes in Legislation of Income Tax (Expense) [Line Items]
Undistributed earnings of foreign subsidiaries considered to be indefinitely reinvested			$ 600