CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
REVENUES
Utilities	$ 2,485	$ 2,334
Energy-related businesses	310	316
Total revenues	2,795	2,650
Utilities [Abstract]
Cost of natural gas	(620)	(556)
Cost of electric fuel and purchased power	(510)	(447)
Energy-related businesses [Abstract]
Cost of natural gas, electric fuel and purchased power	(138)	(111)
Other cost of sales	(38)	(48)
Operation and maintenance	(676)	(724)
Depreciation and amortization	(286)	(295)
Adjustment to loss from plant closure	13	0
Franchise fees and other taxes	(105)	(106)
Gain on sale of equity interest and assets	27	74
Equity (losses) earnings before income tax
Equity (losses) earnings, other	17	10
Other income (expense), net	40	37
Interest income	4	6
Interest expense	(136)	(138)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries	387	352
Income tax (expense) benefit	(127)	(178)
Equity earnings, net of income tax	6	4
Net income	266	178
Losses (earnings) attributable to noncontrolling interests	(19)	2
Preferred dividends of subsidiaries	0	(2)
Earnings	247	178
Basic earnings per common share:
Basic earnings per common share	$ 1.01	$ 0.73
Basic earnings per common share, weighted-average number of shares outstanding (thousands)	245,277	243,294
Diluted earnings per common share:
Diluted earnings per common share	$ 0.99	$ 0.72
Diluted earnings per common share, weighted-average number of shares outstanding (thousands)	249,669	247,534
Dividends declared per share of common stock	$ 0.66	$ 0.63
San Diego Gas and Electric Company and Subsidiary [Member]
Utility operating revenues
Electric	811	772
Natural gas	176	167
Total utility operating revenues	987	939
Utility operating expenses
Utility cost of natural gas	75	76
Utility cost of electric fuel and purchased power	266	209
Utility operation and maintenance	252	297
Utility depreciation and amortization	130	134
Utility franchise fees and other taxes	56	55
Adjustment to utility loss from plant closure	(13)	0
Total utility operating expenses	766	771
Utility operating income	221	168
Equity (losses) earnings before income tax
Other income (expense), net	13	11
Interest income	0	1
Interest expense	(50)	(48)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries	184	132
Income tax (expense) benefit	(83)	(51)
Net income	101	81
Losses (earnings) attributable to noncontrolling interests	(2)	11
Earnings	99	92
Preferred dividend requirements	0	(1)
Earnings attributable to common shares	99	91
Southern California Gas Company [Member]
Utility operating revenues
Total utility operating revenues	1,085	983
Utility operating expenses
Utility cost of natural gas	508	454
Utility operation and maintenance	305	306
Utility depreciation and amortization	105	100
Utility franchise fees and other taxes	38	40
Total utility operating expenses	956	900
Utility operating income	129	83
Equity (losses) earnings before income tax
Other income (expense), net	4	4
Interest expense	(17)	(17)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries	116	70
Income tax (expense) benefit	(38)	(24)
Net income	78	46
Earnings	78	46
Earnings attributable to common shares	$ 78	$ 46