PREFERRED STOCK (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended
	Jan. 09, 2018	Jan. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Preferred Stock [Line Items]
Preferred stock shares authorized			50,000,000	50,000,000
Sempra Energy [Member]
Preferred Stock [Line Items]
Preferred stock shares authorized			50,000,000
Number of preferred stock shares outstanding			0
San Diego Gas and Electric Company [Member]
Preferred Stock [Line Items]
Preferred stock shares authorized			45,000,000	45,000,000
Number of preferred stock shares outstanding			0
Southern California Gas Company [Member]
Preferred Stock [Line Items]
Preferred stock shares authorized			11,000,000	11,000,000
Number of preferred stock shares outstanding			1,000,000	1,000,000
So Cal Gas Series Preferred Stock [Member]
Preferred Stock [Line Items]
Preferred stock shares authorized			5,000,000
So Cal Gas Series Preferred Stock [Member] | Southern California Gas Company [Member]
Preferred Stock [Line Items]
Preferred stock shares authorized			5,000,000
Preferred stock outstanding			$ 22	$ 22
Twenty Five Dollar Par, Six Percent Series [Member] | Southern California Gas Company [Member]
Preferred Stock [Line Items]
Preferred stock shares authorized			1,000,000
Par value (in dollars per share)			$ 25
Number of preferred stock shares outstanding			79,011
Preferred stock outstanding			$ 3	3
Twenty Five Dollar Par, Six Percent Series A [Member] | Southern California Gas Company [Member]
Preferred Stock [Line Items]
Par value (in dollars per share)			$ 25
Number of preferred stock shares outstanding			783,032
Preferred stock outstanding			$ 19	19
Liquidation preference (in dollars per share)			$ 25
So Cal Gas Preferred Stock Owned By Pacific Enterprises [Member]
Preferred Stock [Line Items]
Preferred stock outstanding held by parent			$ (2)	(2)
So Cal Gas Preferred Stock Owned By Pacific Enterprises [Member] | Southern California Gas Company [Member]
Preferred Stock [Line Items]
Number of preferred stock shares outstanding			50,970
Preferred Stock Of Subsidiaries [Member]
Preferred Stock [Line Items]
Preferred stock outstanding			$ 20	$ 20
Subsequent Event [Member] | Convertible Preferred Stock [Member] | Sempra Energy [Member]
Preferred Stock [Line Items]
Shares issued	17,250,000	17,250,000
Value of shares issued		$ 1,690
Liquidation preference (in dollars per share)	$ 100