OTHER FINANCIAL DATA - INVENTORY (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	$ 107	$ 113
Energy Related Inventory, Liquefied Natural Gas	11	8
Energy Related Inventory, Materials And Supplies	149	166
Inventory, Total	267	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	70	83
Inventory, Total	74	86
So Cal Gas Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	35	42
Energy Related Inventory, Liquefied Natural Gas	0	0
Energy Related Inventory, Materials And Supplies	28	27
Inventory, Total	63	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	38	40
Inventory, Total	38	40
Sempra Mexico Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	0	0
Energy Related Inventory, Liquefied Natural Gas	5	3
Energy Related Inventory, Materials And Supplies	9	9
Inventory, Total	14	12
Sempra Natural Gas Segment [Member]
Total Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	68	68
Energy Related Inventory, Liquefied Natural Gas	6	5
Energy Related Inventory, Materials And Supplies	2	5
Inventory, Total	76	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.