Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Electric utility	$ 2,650	$ 2,445	$ 5,061	$ 4,676
Competitive power generation	407	538	851	1,090
Total operating revenue	3,057	2,983	5,912	5,766
Fuel	276	256	559	515
Purchased power	822	649	1,437	1,158
Operation and maintenance	1,209	1,255	2,393	2,404
Depreciation, decommissioning and amortization	467	435	924	852
Asset impairments and other	11	8	26	8
Total operating expenses	2,785	2,603	5,339	4,937
Operating income	272	380	573	829
Interest and dividend income	13	30	16	34
Equity in income from unconsolidated affiliates - net	18	18	17	12
Other income	38	42	68	83
Interest expense	(218)	(203)	(430)	(398)
Other expenses	(19)	(13)	(26)	(25)
Income from continuing operations before income taxes	104	254	218	535
Income tax expense	1	62	2	127
Income from continuing operations	103	192	216	408
Loss from discontinued operations, net of tax	0	(1)	(1)	(3)
Net income	103	191	215	405
Dividends on preferred and preference stock of utility	23	15	41	29
Other noncontrolling interests	6	0	7	0
Net income attributable to Edison International common shareholders	74	176	167	376
Amounts attributable to Edison International common shareholders:
Income from continuing operations, net of tax	74	177	168	379
Loss from discontinued operations, net of tax	0	(1)	(1)	(3)
Net income attributable to Edison International common shareholders	$ 74	$ 176	$ 167	$ 376
Basic earnings (loss) per common share attributable to Edison International common shareholders:
Weighted-average shares of common stock outstanding (in shares)	326	326	326	326
Continuing operations (in dollars per share)	$ 0.23	$ 0.54	$ 0.51	$ 1.16
Discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ 0.00	$ (0.01)
Total (in dollars per share)	$ 0.23	$ 0.54	$ 0.51	$ 1.15
Diluted earnings (loss) per common share attributable to Edison International common shareholders:
Weighted-average shares of common stock outstanding, including effect of dilutive securities (in shares)	334	329	333	328
Continuing operations (in dollars per share)	$ 0.22	$ 0.54	$ 0.50	$ 1.16
Discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ 0.00	$ (0.01)
Total (in dollars per share)	$ 0.22	$ 0.54	$ 0.50	$ 1.15
Dividends declared per common share (in dollars per share)	$ 0.325	$ 0.320	$ 0.65	$ 0.64