Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Electric utility	$ 3,730	$ 3,385	$ 8,791	$ 8,060
Competitive power generation	340	437	1,009	1,277
Total operating revenue	4,070	3,822	9,800	9,337
Fuel	270	272	678	671
Purchased power	1,612	1,264	3,049	2,422
Operation and maintenance	1,152	1,071	3,450	3,325
Depreciation, decommissioning and amortization	465	430	1,389	1,272
(Gain) loss on sale of assets and other	(65)	0	(60)	8
Total operating expenses	3,434	3,037	8,506	7,698
Operating income	636	785	1,294	1,639
Interest and dividend income	3	4	19	38
Equity in income from unconsolidated affiliates, net	25	56	42	68
Other income	37	27	105	110
Interest expense	(214)	(203)	(643)	(600)
Other expenses	(10)	(11)	(36)	(37)
Income from continuing operations before income taxes	477	658	781	1,218
Income tax expense	181	232	217	370
Income from continuing operations	296	426	564	848
Income (loss) from discontinued operations, net of tax	(76)	15	(129)	(3)
Net income	220	441	435	845
Dividends on preferred and preference stock of utility	25	15	66	44
Other noncontrolling interests	5	0	12	(1)
Net income attributable to Edison International common shareholders	190	426	357	802
Amounts attributable to Edison International common shareholders:
Income from continuing operations, net of tax	266	411	486	805
Income (loss) from discontinued operations, net of tax	(76)	15	(129)	(3)
Net income attributable to Edison International common shareholders	$ 190	$ 426	$ 357	$ 802
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)	$ 0.81	$ 1.26	$ 1.49	$ 2.47
Discontinued operations (in dollars per share)	$ (0.23)	$ 0.05	$ (0.40)	$ (0.01)
Total (in dollars per share)	$ 0.58	$ 1.31	$ 1.09	$ 2.46
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)	329	329	328	329
Continuing operations (in dollars per share)	$ 0.81	$ 1.25	$ 1.48	$ 2.46
Discontinued operations (in dollars per share)	$ (0.23)	$ 0.05	$ (0.39)	$ (0.01)
Total (in dollars per share)	$ 0.58	$ 1.30	$ 1.09	$ 2.45
Dividends declared per common share (in dollars per share)	$ 0.325	$ 0.320	$ 0.975	$ 0.960