DERIVATIVE COMMODITY VOLUMES (Details)		Mar. 31, 2016	Dec. 31, 2015
S D G E Segment [Member]
Derivatives, Fair Value [Line Items]
Commodity Derivative Volumes Natural Gas	[1]	60	70
Commodity Derivative Volumes Congestion Revenue Rights	[2]	33	36
Commodity Derivative Volumes Electric Power	[2]	0	1
So Cal Gas Segment [Member]
Derivatives, Fair Value [Line Items]
Commodity Derivative Volumes Natural Gas	[1]	0	1
Sempra Natural Gas Segment [Member]
Derivatives, Fair Value [Line Items]
Commodity Derivative Volumes Natural Gas	[1]	39	43

[1] Million British thermal units

[2] Megawatt hours