DEBT AND CREDIT FACILITIES - CALLABLE LONG-TERM DEBT (Details) $ in Millions	Dec. 31, 2019 USD ($)
Schedule Of Callable Long-term Debt [Line Items]
Callable long-term debt, not subject to make-whole provisions	$ 1,946
Callable long-term debt, subject to make-whole provisions	17,786
San Diego Gas and Electric Company [Member]
Schedule Of Callable Long-term Debt [Line Items]
Callable long-term debt, not subject to make-whole provisions	251
Callable long-term debt, subject to make-whole provisions	4,889
Southern California Gas Company [Member]
Schedule Of Callable Long-term Debt [Line Items]
Callable long-term debt, not subject to make-whole provisions	4
Callable long-term debt, subject to make-whole provisions	3,800
Other Sempra Energy [Member]
Schedule Of Callable Long-term Debt [Line Items]
Callable long-term debt, not subject to make-whole provisions	1,691
Callable long-term debt, subject to make-whole provisions	$ 9,097