OTHER FINANCIAL DATA - COMPREHENSIVE INCOME AND EQUITY 2 (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2015		Jun. 30, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance		$ (613)	[1]	$ (273)	[1]	$ (497)	[2]	$ (228)	[1]
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	[1]	14		(10)		(102)		(67)
Amounts Reclassified From Accumulated Other Comprehensive Income	[1]	3		10		3		22
Net Other Comprehensive Income	[1]	17		0		(99)		(45)
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance		(596)		(273)	[1]	(596)		(273)	[1]
San Diego Gas and Electric Company [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance				(9)	[1]	(12)	[2]	(9)	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	[1]			1				1
Net Other Comprehensive Income	[1]			1				1
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance		(12)		(8)	[1]	(12)		(8)	[1]
Southern California Gas Company [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance	[2]					(18)
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance		(18)				(18)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance	[1]	(384)		(172)		(322)		(129)
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	[1]	(43)		2		(105)		(41)
Amounts Reclassified From Accumulated Other Comprehensive Income	[1]	0		0		0		0
Net Other Comprehensive Income	[1]	(43)		2		(105)		(41)
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance	[1]	(427)		(170)		(427)		(170)
Accumulated Defined Benefit Plans Adjustment Net Unamortized Gain Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance	[1]	(82)		(70)		(83)		(73)
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	[1]	0		0		0		0
Amounts Reclassified From Accumulated Other Comprehensive Income	[1]	1		5		2		8
Net Other Comprehensive Income	[1]	1		5		2		8
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance	[1]	(81)		(65)		(81)		(65)
Accumulated Defined Benefit Plans Adjustment Net Unamortized Gain Loss [Member] | San Diego Gas and Electric Company [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance	[1]			(10)				(10)
Amounts Reclassified From Accumulated Other Comprehensive Income	[1]			1				1
Net Other Comprehensive Income	[1]			1				1
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance	[1]	(13)		(9)		(13)		(9)
Accumulated Defined Benefit Plans Adjustment Net Prior Service Cost Credit [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance	[1]	(2)		0		(2)		0
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	[1]	0		0		0		0
Amounts Reclassified From Accumulated Other Comprehensive Income	[1]	0		0		0		0
Net Other Comprehensive Income	[1]	0		0		0		0
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance	[1]	(2)		0		(2)		0
Accumulated Defined Benefit Plans Adjustment Net Prior Service Cost Credit [Member] | San Diego Gas and Electric Company [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance	[1]			1				1
Amounts Reclassified From Accumulated Other Comprehensive Income	[1]			0				0
Net Other Comprehensive Income	[1]			0				0
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance	[1]	1		1		1		1
Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning balance	[1]	(145)		(31)		(90)		(26)
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	[1]	57		(12)		3		(26)
Amounts Reclassified From Accumulated Other Comprehensive Income	[1]	2		5		1		14
Net Other Comprehensive Income	[1]	59		(7)		4		(12)
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance	[1]	$ (86)		$ (38)		$ (86)		$ (38)

[1] All amounts are net of income tax, if subject to tax, and exclude noncontrolling interests.

[2] Derived from audited financial statements.