OTHER FINANCIAL DATA - INVENTORY (Details) - USD ($) $ in Millions		Mar. 31, 2016	Dec. 31, 2015
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage		$ 77	$ 149
Energy Related Inventory, Liquefied Natural Gas		9	6
Energy Related Inventory, Materials And Supplies		145	143
Inventory, Total		231	298	[1]
S D G E Segment [Member]
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage		3	6
Energy Related Inventory, Liquefied Natural Gas		0	0
Energy Related Inventory, Materials And Supplies		69	69
Inventory, Total		72	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]	33	30
Inventory, Total	[2]	33	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		37	30
Inventory, Total		37	30
Sempra Mexico Segment [Member]
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage		0	0
Energy Related Inventory, Liquefied Natural Gas		6	3
Energy Related Inventory, Materials And Supplies		2	10
Inventory, Total		8	13
Sempra Natural Gas Segment [Member]
Inventory [Line Items]
Energy Related Inventory, Natural Gas in Storage		74	94
Energy Related Inventory, Liquefied Natural Gas		3	3
Energy Related Inventory, Materials And Supplies		1	1
Inventory, Total		78	98
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

[1] Derived from audited financial statements.

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