REGULATORY MATTERS - BILLING PRACTICES (Details) - USD ($)	1 Months Ended		12 Months Ended
	May 31, 2019	Jan. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 31, 2018
Public Utilities, General Disclosures [Line Items]
Penalties Expense			$ 8,000,000	$ 0	$ 0
Southern California Gas Company [Member]
Public Utilities, General Disclosures [Line Items]
Penalties Expense		$ 8,000,000	$ 8,000,000	0	$ 0
Penalties Payable		3,000,000
Penalties Credited to Customers		$ 5,000,000
Days Customers Bills Were Delayed		45 days
Penalty Credit Per Customer	$ 100	$ 100
Sempra Mexico [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory assets				$ 5,000,000		$ 7,000,000