DERIVATIVE FINANCIAL INSTRUMENTS 3 (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
OtherCurrentAssetsMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	$ 10,000,000	[1],[2]	$ 10,000,000	[1]
Commodity contracts not subject to rate recovery			25,000,000	[1]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments	11,000,000	[1]	8,000,000	[1]
Commodity contracts not subject to rate recovery	129,000,000	[1]	143,000,000	[1]
Associated offsetting commodity contracts not subject to rate recovery	(123,000,000)	[1]	(129,000,000)	[1]
Associated cash collateral commodity contracts not subject to rate recovery	0	[1]	(11,000,000)	[1]
Commodity contracts subject to rate recovery	28,000,000	[1]	36,000,000	[1]
Associated cash collateral commodity contracts subject to rate recovery	0	[1]	0	[1]
Associated offsetting commodity contracts subject to rate recovery	(1,000,000)	[1]	(3,000,000)	[1]
Net amount presented on balance sheet	54,000,000	[1]	79,000,000	[1]
Additional margin posted for commodity contracts not subject to rate recovery	16,000,000	[1]
Additional margin posted for commodity contracts subject to rate recovery	19,000,000	[1]	14,000,000	[1]
Total	89,000,000	[1],[3]	93,000,000	[1],[3]
OtherCurrentAssetsMember | San Diego Gas and Electric Company [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	0	[2]	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	26,000,000		32,000,000
Associated cash collateral commodity contracts subject to rate recovery	0		0
Associated offsetting commodity contracts subject to rate recovery			0
Net amount presented on balance sheet	26,000,000		32,000,000
Additional margin posted for commodity contracts not subject to rate recovery	1,000,000
Additional margin posted for commodity contracts subject to rate recovery	17,000,000		12,000,000
Total	44,000,000	[3]	44,000,000	[3]
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	0
Associated cash collateral commodity contracts not subject to rate recovery	0
Commodity contracts subject to rate recovery	2,000,000	[1]	4,000,000	[1]
Associated offsetting commodity contracts subject to rate recovery	(1,000,000)	[1]	(3,000,000)	[1]
Net amount presented on balance sheet	1,000,000	[1]	1,000,000	[1]
Additional margin posted for commodity contracts not subject to rate recovery	1,000,000	[1]
Additional margin posted for commodity contracts subject to rate recovery	2,000,000	[1]	2,000,000	[1]
Total	4,000,000	[1]	3,000,000	[1]
OtherNoncurrentAssetsMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	3,000,000	[2]	3,000,000
Commodity contracts not subject to rate recovery			0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments	28,000,000		27,000,000
Commodity contracts not subject to rate recovery	25,000,000		32,000,000
Associated offsetting commodity contracts not subject to rate recovery	(21,000,000)		(27,000,000)
Associated cash collateral commodity contracts not subject to rate recovery	0		0
Commodity contracts subject to rate recovery	76,000,000		76,000,000
Associated cash collateral commodity contracts subject to rate recovery	0		0
Associated offsetting commodity contracts subject to rate recovery	0		(1,000,000)
Net amount presented on balance sheet	111,000,000		110,000,000
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	111,000,000	[3]	110,000,000	[3]
OtherNoncurrentAssetsMember | San Diego Gas and Electric Company [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	0	[2]	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	76,000,000		76,000,000
Associated cash collateral commodity contracts subject to rate recovery	0		0
Associated offsetting commodity contracts subject to rate recovery			(1,000,000)
Net amount presented on balance sheet	76,000,000		75,000,000
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	76,000,000	[3]	75,000,000	[3]
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		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	(17,000,000)	[2],[4]	(17,000,000)	[4]
Commodity contracts not subject to rate recovery			0	[4]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments	(7,000,000)	[4]	(7,000,000)	[4]
Commodity contracts not subject to rate recovery	(137,000,000)	[4]	(135,000,000)	[4]
Associated offsetting commodity contracts not subject to rate recovery	123,000,000	[4]	129,000,000	[4]
Associated cash collateral commodity contracts not subject to rate recovery	10,000,000	[4]	0	[4]
Commodity contracts subject to rate recovery	(35,000,000)	[4]	(36,000,000)	[4]
Associated cash collateral commodity contracts subject to rate recovery	27,000,000	[4]	23,000,000	[4]
Associated offsetting commodity contracts subject to rate recovery	1,000,000	[4]	3,000,000	[4]
Net amount presented on balance sheet	(35,000,000)	[4]	(40,000,000)	[4]
Additional margin posted for commodity contracts not subject to rate recovery	0	[4]
Additional margin posted for commodity contracts subject to rate recovery	0	[4]	0	[4]
Total	(35,000,000)	[3],[4]	(40,000,000)	[3],[4]
OtherCurrentLiabilitiesMember | San Diego Gas and Electric Company [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	(16,000,000)	[2]	(16,000,000)
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts not subject to rate recovery	(1,000,000)
Associated cash collateral commodity contracts not subject to rate recovery	1,000,000
Commodity contracts subject to rate recovery	(34,000,000)		(32,000,000)
Associated cash collateral commodity contracts subject to rate recovery	27,000,000		23,000,000
Associated offsetting commodity contracts subject to rate recovery			0
Net amount presented on balance sheet	(23,000,000)		(25,000,000)
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	(23,000,000)	[3]	(25,000,000)	[3]
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	(2,000,000)
Associated cash collateral commodity contracts not subject to rate recovery	2,000,000
Commodity contracts subject to rate recovery	(1,000,000)	[4]	(4,000,000)	[4]
Associated offsetting commodity contracts subject to rate recovery	1,000,000	[4]	3,000,000	[4]
Net amount presented on balance sheet	0	[4]	(1,000,000)	[4]
Additional margin posted for commodity contracts not subject to rate recovery	0	[4]
Additional margin posted for commodity contracts subject to rate recovery	0	[4]	0	[4]
Total	0	[4]	(1,000,000)	[4]
OtherNoncurrentLiabilitiesMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	(130,000,000)	[2]	(109,000,000)
Commodity contracts not subject to rate recovery			0
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments	(25,000,000)		(22,000,000)
Commodity contracts not subject to rate recovery	(22,000,000)		(29,000,000)
Associated offsetting commodity contracts not subject to rate recovery	21,000,000		27,000,000
Associated cash collateral commodity contracts not subject to rate recovery	1,000,000		0
Commodity contracts subject to rate recovery	(33,000,000)		(20,000,000)
Associated cash collateral commodity contracts subject to rate recovery	27,000,000		13,000,000
Associated offsetting commodity contracts subject to rate recovery	0		1,000,000
Net amount presented on balance sheet	(161,000,000)		(139,000,000)
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	(161,000,000)	[3]	(139,000,000)	[3]
OtherNoncurrentLiabilitiesMember | San Diego Gas and Electric Company [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	(32,000,000)	[2]	(31,000,000)
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	(33,000,000)		(20,000,000)
Associated cash collateral commodity contracts subject to rate recovery	27,000,000		13,000,000
Associated offsetting commodity contracts subject to rate recovery			1,000,000
Net amount presented on balance sheet	(38,000,000)		(37,000,000)
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	(38,000,000)	[3]	(37,000,000)	[3]
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		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.