SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Presentation Of Restricted Cash [Line Items]
Cash and cash equivalents	$ 559	$ 960	$ 108
Restricted cash, current	19	22	31
Restricted cash, noncurrent	3	3	3
Cash, cash equivalents and restricted cash in discontinued operations	0	0	75
Total cash, cash equivalents and restricted cash on the Consolidated Statements of Cash Flows	$ 581	985	217	$ 246
Discontinued Operations, Held-for-sale | Sempra South American Utilities
Presentation Of Restricted Cash [Line Items]
Cash, cash equivalents and restricted cash in discontinued operations			1
Cash and cash equivalents		$ 4,600	$ 74