OTHER FINANCIAL DATA - INVENTORY (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	$ 37	$ 113
Energy Related Inventory, Liquefied Natural Gas	9	8
Energy Related Inventory, Materials And Supplies	151	166
Inventory, Total	197	287	[1]
S D G E Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	4	3
Energy Related Inventory, Liquefied Natural Gas	0	0
Energy Related Inventory, Materials And Supplies	72	83
Inventory, Total	76	86
So Cal Gas Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	17	42
Energy Related Inventory, Liquefied Natural Gas	0	0
Energy Related Inventory, Materials And Supplies	28	27
Inventory, Total	45	69
Sempra South American Utilities Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	0	0
Energy Related Inventory, Liquefied Natural Gas	0	0
Energy Related Inventory, Materials And Supplies	39	40
Inventory, Total	39	40
Sempra Mexico Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	0	0
Energy Related Inventory, Liquefied Natural Gas	4	3
Energy Related Inventory, Materials And Supplies	9	9
Inventory, Total	13	12
Sempra Natural Gas Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	16	68
Energy Related Inventory, Liquefied Natural Gas	5	5
Energy Related Inventory, Materials And Supplies	1	5
Inventory, Total	22	78
Sempra Renewables Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	0	0
Energy Related Inventory, Liquefied Natural Gas	0	0
Energy Related Inventory, Materials And Supplies	2	2
Inventory, Total	$ 2	$ 2

[1] Derived from audited financial statements.