DERIVATIVE FINANCIAL INSTRUMENTS 3 (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
OtherCurrentAssetsMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	$ 12,000,000	[1],[2]	$ 14,000,000	[1],[2]
Commodity contracts not subject to rate recovery	1,000,000	[2]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments	8,000,000	[2]	8,000,000	[2]
Commodity contracts not subject to rate recovery	39,000,000	[2]	47,000,000	[2]
Associated offsetting commodity contracts not subject to rate recovery	(32,000,000)	[2]	(43,000,000)	[2]
Associated cash collateral commodity contracts not subject to rate recovery	0	[2]	0	[2]
Commodity contracts subject to rate recovery	14,000,000	[2]	35,000,000	[2]
Associated cash collateral commodity contracts subject to rate recovery	0	[2]
Associated offsetting commodity contracts subject to rate recovery	(4,000,000)	[2]	(3,000,000)	[2]
Net amount presented on balance sheet	38,000,000	[2]	58,000,000	[2]
Additional margin posted for commodity contracts not subject to rate recovery	15,000,000	[2]	17,000,000	[2]
Additional margin posted for commodity contracts subject to rate recovery	30,000,000	[2]	31,000,000	[2]
Total	83,000,000	[2],[3]	106,000,000	[2],[3]
OtherCurrentAssetsMember | San Diego Gas and Electric Company and Subsidiary [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	0	[1],[2]	0	[1],[2]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts subject to rate recovery	11,000,000	[2]	34,000,000	[2]
Associated cash collateral commodity contracts subject to rate recovery	0	[2]
Associated offsetting commodity contracts subject to rate recovery	(2,000,000)	[2]	(3,000,000)	[2]
Net amount presented on balance sheet	9,000,000	[2]	31,000,000	[2]
Additional margin posted for commodity contracts not subject to rate recovery	1,000,000	[2]	1,000,000	[2]
Additional margin posted for commodity contracts subject to rate recovery	28,000,000	[2]	29,000,000	[2]
Total	38,000,000	[2],[3]	61,000,000	[2],[3]
OtherCurrentAssetsMember | Southern California Gas Company [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts subject to rate recovery	3,000,000	[2]	1,000,000	[2]
Associated offsetting commodity contracts subject to rate recovery	(2,000,000)	[2]
Net amount presented on balance sheet	1,000,000	[2]	1,000,000	[2]
Additional margin posted for commodity contracts not subject to rate recovery	2,000,000	[2]	2,000,000	[2]
Additional margin posted for commodity contracts subject to rate recovery	2,000,000	[2]	2,000,000	[2]
Total	5,000,000	[2]	5,000,000	[2]
OtherNoncurrentAssetsMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	7,000,000	[1]	12,000,000	[1]
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	24,000,000		22,000,000
Commodity contracts not subject to rate recovery	10,000,000		7,000,000
Associated offsetting commodity contracts not subject to rate recovery	(7,000,000)		(5,000,000)
Associated cash collateral commodity contracts not subject to rate recovery	0		0
Commodity contracts subject to rate recovery	82,000,000		72,000,000
Associated cash collateral commodity contracts subject to rate recovery	0
Associated offsetting commodity contracts subject to rate recovery	(2,000,000)		(2,000,000)
Net amount presented on balance sheet	114,000,000		106,000,000
Additional margin posted for commodity contracts not subject to rate recovery	0		0
Additional margin posted for commodity contracts subject to rate recovery	0		0
Total	114,000,000	[3]	106,000,000	[3]
OtherNoncurrentAssetsMember | San Diego Gas and Electric Company and Subsidiary [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	0	[1]	0	[1]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts subject to rate recovery	82,000,000		72,000,000
Associated cash collateral commodity contracts subject to rate recovery	0
Associated offsetting commodity contracts subject to rate recovery	(2,000,000)		(2,000,000)
Net amount presented on balance sheet	80,000,000		70,000,000
Additional margin posted for commodity contracts not subject to rate recovery	0		0
Additional margin posted for commodity contracts subject to rate recovery	0		0
Total	80,000,000	[4]	70,000,000	[3]
OtherNoncurrentAssetsMember | Southern California Gas Company [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
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		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)	[1],[5]	(18,000,000)	[1],[5]
Commodity contracts not subject to rate recovery	0	[5]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Interest rate and foreign exchange instruments	(7,000,000)	[5]	(7,000,000)	[5]
Commodity contracts not subject to rate recovery	(36,000,000)	[5]	(51,000,000)	[5]
Associated offsetting commodity contracts not subject to rate recovery	32,000,000	[5]	43,000,000	[5]
Associated cash collateral commodity contracts not subject to rate recovery	1,000,000	[5]	1,000,000	[5]
Commodity contracts subject to rate recovery	(13,000,000)	[5]	(10,000,000)	[5]
Associated cash collateral commodity contracts subject to rate recovery	3,000,000	[5]
Associated offsetting commodity contracts subject to rate recovery	4,000,000	[5]	3,000,000	[5]
Net amount presented on balance sheet	(33,000,000)	[5]	(39,000,000)	[5]
Additional margin posted for commodity contracts not subject to rate recovery	0	[5]	0	[5]
Additional margin posted for commodity contracts subject to rate recovery	0	[5]	0	[5]
Total	(33,000,000)	[3],[5]	(39,000,000)	[3],[5]
OtherCurrentLiabilitiesMember | San Diego Gas and Electric Company and Subsidiary [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	(16,000,000)	[1]	(16,000,000)	[1],[5]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts subject to rate recovery	(11,000,000)	[5]	(9,000,000)	[5]
Associated cash collateral commodity contracts subject to rate recovery	3,000,000	[5]
Associated offsetting commodity contracts subject to rate recovery	2,000,000	[5]	3,000,000	[5]
Net amount presented on balance sheet	(22,000,000)	[5]	(22,000,000)	[5]
Additional margin posted for commodity contracts not subject to rate recovery	0	[5]	0	[5]
Additional margin posted for commodity contracts subject to rate recovery	0	[5]	0	[5]
Total	(22,000,000)	[3],[5]	(22,000,000)	[3],[5]
OtherCurrentLiabilitiesMember | Southern California Gas Company [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts subject to rate recovery	(2,000,000)	[5]	(1,000,000)	[5]
Associated offsetting commodity contracts subject to rate recovery	2,000,000	[5]
Net amount presented on balance sheet	0	[5]	(1,000,000)	[5]
Additional margin posted for commodity contracts not subject to rate recovery	0	[5]	0	[5]
Additional margin posted for commodity contracts subject to rate recovery	0	[5]	0	[5]
Total	0	[5]	(1,000,000)	[5]
OtherNoncurrentLiabilitiesMember
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	(77,000,000)	[1]	(75,000,000)	[1]
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	(20,000,000)		(17,000,000)
Commodity contracts not subject to rate recovery	(7,000,000)		(5,000,000)
Associated offsetting commodity contracts not subject to rate recovery	7,000,000		5,000,000
Associated cash collateral commodity contracts not subject to rate recovery	0		0
Commodity contracts subject to rate recovery	(6,000,000)		(8,000,000)
Associated cash collateral commodity contracts subject to rate recovery	0
Associated offsetting commodity contracts subject to rate recovery	2,000,000		2,000,000
Net amount presented on balance sheet	(101,000,000)		(98,000,000)
Additional margin posted for commodity contracts not subject to rate recovery	0		0
Additional margin posted for commodity contracts subject to rate recovery	0		0
Total	(101,000,000)	[3]	(98,000,000)	[3]
OtherNoncurrentLiabilitiesMember | San Diego Gas and Electric Company and Subsidiary [Member]
Derivative Instruments in Hedges, at Fair Value, Net [Abstract]
Interest rate and foreign exchange instruments	(32,000,000)	[1]	(39,000,000)	[1]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
Commodity contracts subject to rate recovery	(6,000,000)		(8,000,000)
Associated cash collateral commodity contracts subject to rate recovery	0
Associated offsetting commodity contracts subject to rate recovery	2,000,000		2,000,000
Net amount presented on balance sheet	(36,000,000)		(45,000,000)
Additional margin posted for commodity contracts not subject to rate recovery	0		0
Additional margin posted for commodity contracts subject to rate recovery	0		0
Total	(36,000,000)	[3]	(45,000,000)	[3]
OtherNoncurrentLiabilitiesMember | Southern California Gas Company [Member]
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]
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		0
Additional margin posted for commodity contracts subject to rate recovery	0		0
Total	$ 0		$ 0

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

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

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

[4] Derived from audited financial statements.

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