OTHER FINANCIAL DATA - INVENTORY (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage		$ 97	$ 149
Energy Related Inventory, Liquefied Natural Gas		11	6
Energy Related Inventory, Materials And Supplies		162	143
Inventory, Total		270	298	[1]
S D G E Segment [Member]
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage		1	6
Energy Related Inventory, Liquefied Natural Gas		0	0
Energy Related Inventory, Materials And Supplies		70	69
Inventory, Total		71	75
So Cal Gas Segment [Member]
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage	[2]	0	49
Energy Related Inventory, Liquefied Natural Gas	[2]	0	0
Energy Related Inventory, Materials And Supplies	[2]	44	30
Inventory, Total	[2]	44	79
Sempra South American Utilities Segment [Member]
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		43	30
Inventory, Total		43	30
Sempra Mexico Segment [Member]
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage		0	0
Energy Related Inventory, Liquefied Natural Gas		7	3
Energy Related Inventory, Materials And Supplies		2	10
Inventory, Total		9	13
Sempra Renewables Segment [Member]
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		3	3
Inventory, Total		3	3
Sempra Natural Gas Segment [Member]
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage		96	94
Energy Related Inventory, Liquefied Natural Gas		4	3
Energy Related Inventory, Materials And Supplies		0	1
Inventory, Total		$ 100	$ 98

[1] Derived from audited financial statements.

[2] At both June 30, 2016 and December 31, 2015, SoCalGas' natural gas inventory for core customers is net of an inventory loss related to the Aliso Canyon natural gas leak, which we discuss in Note 11.