CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
REVENUES
Utilities		$ 2,133	$ 2,370	$ 4,555	$ 4,855
Energy-related businesses		234	308	494	618
Total revenues		2,367	2,678	5,049	5,473
Utilities [Abstract]
Cost of natural gas		(239)	(395)	(585)	(1,015)
Cost of electric fuel and purchased power		(498)	(571)	(979)	(1,081)
Energy-related businesses [Abstract]
Cost of natural gas, electric fuel and purchased power		(73)	(126)	(171)	(264)
Other cost of sales		(42)	(42)	(77)	(80)
Operation and maintenance		(713)	(729)	(1,371)	(1,405)
Depreciation and amortization		(307)	(288)	(610)	(574)
Plant closure adjustment (loss)		0	0	21	13
Franchise fees and other taxes		(96)	(92)	(203)	(197)
Gain on sale of equity interest and assets		62	2	62	29
Equity (losses) earnings before income tax
Equity (losses) earnings, other		27	23	46	40
Other income (expense), net		37	49	76	89
Interest income		10	5	17	9
Interest expense		(139)	(138)	(273)	(274)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries		396	376	1,002	763
Income tax (expense) benefit		(98)	(93)	(261)	(220)
Equity earnings, net of income tax		22	9	37	15
Net income		320	292	778	558
Losses (earnings) attributable to noncontrolling interests		(24)	(22)	(45)	(41)
Preferred dividends of subsidiary		(1)	(1)	(1)	(1)
Earnings		$ 295	$ 269	$ 732	$ 516
Basic earnings per common share:
Basic earnings per common share		$ 1.19	$ 1.1	$ 2.95	$ 2.1
Basic earnings per common share, weighted-average number of shares outstanding (thousands)	[1]	248,108	245,688	247,916	245,484
Diluted earnings per common share:
Diluted earnings per common share		$ 1.17	$ 1.08	$ 2.91	$ 2.07
Diluted earnings per common share, weighted-average number of shares outstanding (thousands)		251,491	250,061	251,264	249,816
Dividends declared per share of common stock		$ 0.7	$ 0.66	$ 1.4	$ 1.32
San Diego Gas and Electric Company [Member]
Utility operating revenues
Electric		$ 874	$ 948	$ 1,679	$ 1,759
Natural gas		98	115	259	291
Total utility operating revenues		972	1,063	1,938	2,050
Utility operating expenses
Utility cost of natural gas		31	51	85	126
Utility cost of electric fuel and purchased power		251	329	479	595
Utility operation and maintenance		255	256	472	508
Utility depreciation		149	131	294	261
Utility franchise fees and other taxes		59	54	120	110
Utility plant closure (adjustment) loss		0	0	(21)	(13)
Total utility operating expenses		745	821	1,429	1,587
Utility operating income		227	242	509	463
Equity (losses) earnings before income tax
Other income (expense), net		9	7	18	20
Interest expense		(52)	(51)	(104)	(101)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries		184	198	423	382
Income tax (expense) benefit		(54)	(69)	(142)	(152)
Net income		130	129	281	230
Losses (earnings) attributable to noncontrolling interests		(4)	(6)	(8)	(8)
Earnings		126	123	273	222
Southern California Gas Company [Member]
Utility operating revenues
Total utility operating revenues		780	917	1,828	2,002
Utility operating expenses
Utility cost of natural gas		196	321	463	829
Utility operation and maintenance		346	337	660	642
Utility depreciation		113	107	226	212
Utility franchise fees and other taxes		31	30	65	68
Total utility operating expenses		686	795	1,414	1,751
Utility operating income		94	122	414	251
Equity (losses) earnings before income tax
Other income (expense), net		9	3	17	7
Interest income		3	0	3	0
Interest expense		(19)	(16)	(38)	(33)
Income before income taxes and equity earnings of certain unconsolidated subsidiaries		87	109	396	225
Income tax (expense) benefit		(16)	(28)	(111)	(66)
Net income		71	81	285	159
Earnings		71	81	285	159
Preferred dividend requirements		(1)	(1)	(1)	(1)
Earnings attributable to common shares		$ 70	$ 80	$ 284	$ 158

[1] Includes fully vested restricted stock units of 501 and 476 held in our Deferred Compensation Plan for the three months and six months ended June 30, 2015, respectively, and 221 and 202 for the three months and six months ended June 30, 2014, respectively. These fully vested restricted stock units are included in weighted-average common shares outstanding for basic EPS because there are no conditions under which the corresponding shares will not be issued.