DERIVATIVE FINANCIAL INSTRUMENTS (Details)	Mar. 31, 2015		Dec. 31, 2014
S D G E Segment [Member]
Schedule Of Commodity Derivative Volumes [Line Items]
Commodity derivative volumes, natural gas (in millions of million British thermal units)	57	[1]	55	[1]
Commodity derivative volumes, congestion revenue rights (in millions of megawatt hours)	24	[2]	27	[2]
So Cal Gas Segment [Member]
Schedule Of Commodity Derivative Volumes [Line Items]
Commodity derivative volumes, natural gas (in millions of million British thermal units)	1	[1]	1	[1]
Sempra Natural Gas Segment [Member]
Schedule Of Commodity Derivative Volumes [Line Items]
Commodity derivative volumes, natural gas (in millions of million British thermal units)	7	[1]	29	[1]

[1] Million British thermal units

[2] Megawatt hours