CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
REVENUES
Utilities	$ 1,922		$ 1,550		$ 3,868		$ 3,541
Energy-related businesses	500		458		988		1,001
Total revenues	2,422		2,008		4,856		4,542
Utilities [Abstract]
Cost of natural gas	(403)		(381)		(1,045)		(1,184)
Cost of electric fuel and purchased power	(397)		(129)		(568)		(277)
Energy-related businesses [Abstract]
Cost of natural gas, electric fuel and purchased power	(212)		(235)		(442)		(528)
Other cost of sales	(32)		(20)		(55)		(45)
Litigation expense	(6)		1		(13)		(167)
Other operation and maintenance	(667)		(616)		(1,299)		(1,192)
Depreciation and amortization	(248)		(215)		(479)		(425)
Franchise fees and other taxes	(80)		(77)		(175)		(167)
Utility operating expenses
Equity earnings, before income tax	7		(8)		8		7
Remeasurement of equity method investments	277				277
Other income (expense), net	31		8		74		16
Interest income	12		4		15		8
Interest expense	(118)		(103)		(226)		(212)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries	586		237		928		376
Income tax (expense) benefit	(92)		(59)		(201)		(117)
Equity earnings, net of income tax	8		27		39		46
Net income	502	[1]	205	[1]	766	[1]	305	[1]
Losses (earnings) attributable to noncontrolling interests	12		20		8		28
Preferred dividends of subsidiaries	(3)		(3)		(5)		(5)
Earnings	511		222		769		328
Basic earnings per common share:
Basic earnings per common share	$ 2.14		$ 0.90		$ 3.21		$ 1.33
Basic earnings per common share, weighted-average number of shares outstanding (thousands)	239,415		246,784		239,769		246,435
Diluted earnings per common share:
Diluted earnings per common share	$ 2.12		$ 0.89		$ 3.19		$ 1.31
Diluted earnings per common share, weighted-average number of shares outstanding (thousands)	240,761		249,727		241,154		249,835
Dividends declared per share of common stock	$ 0.48		$ 0.39		$ 0.96		$ 0.78
San Diego Gas and Electric Company and Subsidiary [Member]
Utility operating revenues
Electric	583		589		1,248		1,152
Natural gas	114		103		289		282
Total utility operating revenues	697		692		1,537		1,434
Utility operating expenses
Utility cost of natural gas	52		44		135		133
Utility cost of electric fuel and purchased power	156		129		327		277
Utility operation and maintenance	228		237		501		469
Utility depreciation and amortization	105		95		208		187
Utility franchise fees and other taxes	43		41		90		84
Total utility operating expenses	584		546		1,261		1,150
Utility operating income	113		146		276		284
Other income (expense), net	13		(16)		29		(16)
Interest expense	(31)		(31)		(67)		(62)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries	95		99		238		206
Income tax (expense) benefit	(42)		(44)		(91)		(75)
Net income	53		55		147		131
Losses (earnings) attributable to noncontrolling interests	19		21		15		29
Earnings	72		76		162		160
Preferred dividend requirements	(1)		(1)		(2)		(2)
Earnings attributable to common shares	71		75		160		158
Southern California Gas Company [Member]
Utility operating revenues
Total utility operating revenues	876		834		1,932		2,016
Utility operating expenses
Utility cost of natural gas	335		318		866		992
Utility operation and maintenance	327		293		615		555
Utility depreciation and amortization	82		77		163		152
Utility franchise fees and other taxes	29		28		66		65
Total utility operating expenses	773		716		1,710		1,764
Utility operating income	103		118		222		252
Other income (expense), net	3		2		6		6
Interest expense	(18)		(16)		(35)		(33)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries	88		104		193		225
Income tax (expense) benefit	(28)		(34)		(65)		(90)
Net income	60		70		128		135
Earnings	60		70		128		135
Preferred dividend requirements	(1)		(1)		(1)		(1)
Earnings attributable to common shares	$ 59		$ 69		$ 127		$ 134

[1] Before preferred dividends of subsidiaries.