DERIVATIVE FINANCIAL INSTRUMENTS 3 (Details) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
OtherCurrentAssetsMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	[1],[2]	$ 9	$ 10
Commodity contracts not subject to rate recovery	[1]	1	25
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments	[1]	8	8
Commodity contracts not subject to rate recovery	[1]	78	143
Associated offsetting commodity contracts not subject to rate recovery	[1]	(69)	(129)
Associated cash collateral commodity contracts not subject to rate recovery	[1]	0	(11)
Commodity contracts subject to rate recovery	[1]	15	36
Associated cash collateral commodity contracts subject to rate recovery	[1]	0	0
Associated offsetting commodity contracts subject to rate recovery	[1]	(1)	(3)
Net amount presented on balance sheet	[1]	41	79
Additional margin posted for commodity contracts not subject to rate recovery	[1]	17
Additional margin posted for commodity contracts subject to rate recovery	[1]	27	14
Total	[1],[3]	85	93
OtherCurrentAssetsMember | San Diego Gas and Electric Company [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	[1],[2]	0	0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery	[1]	0
Associated cash collateral commodity contracts not subject to rate recovery	[1]	0
Commodity contracts subject to rate recovery	[1]	14	32
Associated cash collateral commodity contracts subject to rate recovery	[1]	0	0
Associated offsetting commodity contracts subject to rate recovery	[1]	(1)	0
Net amount presented on balance sheet	[1]	13	32
Additional margin posted for commodity contracts not subject to rate recovery	[1]	1
Additional margin posted for commodity contracts subject to rate recovery	[1]	26	12
Total	[1],[3]	40	44
OtherCurrentAssetsMember | Southern California Gas Company [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery	[1]	0
Associated cash collateral commodity contracts not subject to rate recovery	[1]	0
Commodity contracts subject to rate recovery	[1]	1	4
Associated offsetting commodity contracts subject to rate recovery	[1]		(3)
Net amount presented on balance sheet	[1]	1	1
Additional margin posted for commodity contracts not subject to rate recovery	[1]	2
Additional margin posted for commodity contracts subject to rate recovery	[1]	1	2
Total	[1]	4	3
OtherNoncurrentAssetsMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	[2]	2	3
Commodity contracts not subject to rate recovery		0	0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments		24	27
Commodity contracts not subject to rate recovery		24	32
Associated offsetting commodity contracts not subject to rate recovery		(15)	(27)
Associated cash collateral commodity contracts not subject to rate recovery		0	0
Commodity contracts subject to rate recovery		75	76
Associated cash collateral commodity contracts subject to rate recovery		0	0
Associated offsetting commodity contracts subject to rate recovery		(1)	(1)
Net amount presented on balance sheet		109	110
Additional margin posted for commodity contracts not subject to rate recovery		0
Additional margin posted for commodity contracts subject to rate recovery		0	0
Total	[3]	109	110
OtherNoncurrentAssetsMember | San Diego Gas and Electric Company [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	[2]	0	0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery		0
Associated cash collateral commodity contracts not subject to rate recovery		0
Commodity contracts subject to rate recovery		75	76
Associated cash collateral commodity contracts subject to rate recovery		0	0
Associated offsetting commodity contracts subject to rate recovery		(1)	(1)
Net amount presented on balance sheet		74	75
Additional margin posted for commodity contracts not subject to rate recovery		0
Additional margin posted for commodity contracts subject to rate recovery		0	0
Total	[3]	74	75
OtherNoncurrentAssetsMember | Southern California Gas Company [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery		0
Associated cash collateral commodity contracts not subject to rate recovery		0
Commodity contracts subject to rate recovery		0	0
Associated offsetting commodity contracts subject to rate recovery			0
Net amount presented on balance sheet		0	0
Additional margin posted for commodity contracts not subject to rate recovery		0
Additional margin posted for commodity contracts subject to rate recovery		0	0
Total		0	0
OtherCurrentLiabilitiesMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	[2],[4]	(17)	(17)
Commodity contracts not subject to rate recovery	[4]	0	0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments	[4]	(6)	(7)
Commodity contracts not subject to rate recovery	[4]	(76)	(135)
Associated offsetting commodity contracts not subject to rate recovery	[4]	69	129
Associated cash collateral commodity contracts not subject to rate recovery	[4]	5	0
Commodity contracts subject to rate recovery	[4]	(37)	(36)
Associated cash collateral commodity contracts subject to rate recovery	[4]	21	23
Associated offsetting commodity contracts subject to rate recovery	[4]	1	3
Net amount presented on balance sheet	[4]	(40)	(40)
Additional margin posted for commodity contracts not subject to rate recovery	[4]	0
Additional margin posted for commodity contracts subject to rate recovery	[4]	0	0
Total	[3],[4]	(40)	(40)
OtherCurrentLiabilitiesMember | San Diego Gas and Electric Company [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	[2],[4]	(15)	(16)
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery	[4]	(1)
Associated cash collateral commodity contracts not subject to rate recovery	[4]	1
Commodity contracts subject to rate recovery	[4]	(37)	(32)
Associated cash collateral commodity contracts subject to rate recovery	[4]	21	23
Associated offsetting commodity contracts subject to rate recovery	[4]	1	0
Net amount presented on balance sheet	[4]	(30)	(25)
Additional margin posted for commodity contracts not subject to rate recovery	[4]	0
Additional margin posted for commodity contracts subject to rate recovery	[4]	0	0
Total	[3],[4]	(30)	(25)
OtherCurrentLiabilitiesMember | Southern California Gas Company [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery	[4]	(1)
Associated cash collateral commodity contracts not subject to rate recovery	[4]	1
Commodity contracts subject to rate recovery	[4]	0	(4)
Associated offsetting commodity contracts subject to rate recovery	[4]		3
Net amount presented on balance sheet	[4]	0	(1)
Additional margin posted for commodity contracts not subject to rate recovery	[4]	0
Additional margin posted for commodity contracts subject to rate recovery	[4]	0	0
Total	[4]	0	(1)
OtherNoncurrentLiabilitiesMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	[2]	(129)	(109)
Commodity contracts not subject to rate recovery		0	0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments		(20)	(22)
Commodity contracts not subject to rate recovery		(16)	(29)
Associated offsetting commodity contracts not subject to rate recovery		15	27
Associated cash collateral commodity contracts not subject to rate recovery		1	0
Commodity contracts subject to rate recovery		(64)	(20)
Associated cash collateral commodity contracts subject to rate recovery		21	13
Associated offsetting commodity contracts subject to rate recovery		1	1
Net amount presented on balance sheet		(191)	(139)
Additional margin posted for commodity contracts not subject to rate recovery		0
Additional margin posted for commodity contracts subject to rate recovery		0	0
Total	[3]	(191)	(139)
OtherNoncurrentLiabilitiesMember | San Diego Gas and Electric Company [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	[2]	(28)	(31)
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery		0
Associated cash collateral commodity contracts not subject to rate recovery		0
Commodity contracts subject to rate recovery		(64)	(20)
Associated cash collateral commodity contracts subject to rate recovery		21	13
Associated offsetting commodity contracts subject to rate recovery		1	1
Net amount presented on balance sheet		(70)	(37)
Additional margin posted for commodity contracts not subject to rate recovery		0
Additional margin posted for commodity contracts subject to rate recovery		0	0
Total	[3]	(70)	(37)
OtherNoncurrentLiabilitiesMember | Southern California Gas Company [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery		0
Associated cash collateral commodity contracts not subject to rate recovery		0
Commodity contracts subject to rate recovery		0	0
Associated offsetting commodity contracts subject to rate recovery			0
Net amount presented on balance sheet		0	0
Additional margin posted for commodity contracts not subject to rate recovery		0
Additional margin posted for commodity contracts subject to rate recovery		0	0
Total		$ 0	$ 0

[1] Included in Current Assets: Other for SoCalGas.

[2] Includes Otay Mesa VIE. All of SDG&E’s amounts relate to Otay Mesa VIE.

[3] Normal purchase contracts previously measured at fair value are excluded.

[4] Included in Current Liabilities: Other for SoCalGas.