DERIVATIVE FINANCIAL INSTRUMENTS (Details)	Sep. 30, 2014		Dec. 31, 2013
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)	43	[1]	43	[1]
Commodity derivative volumes, congestion revenue rights (in millions of megawatt hours)	27	[2]	33	[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)	0	[1]	2	[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)	31	[1]	15	[1]
Commodity derivative volumes, electric power (in millions of megawatt hours)	0	[2]	1	[2]

[1] Million British thermal units

[2] Megawatt hours