Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Electric utility	$ 2,412	$ 2,230
Competitive power generation	444	552
Total operating revenue	2,856	2,782
Fuel	283	258
Purchased power	615	508
Operation and maintenance	1,184	1,149
Depreciation, decommissioning and amortization	456	417
Asset impairments and other	14	0
Total operating expenses	2,552	2,332
Operating income	304	450
Interest and dividend income	3	4
Equity in loss from unconsolidated affiliates - net	(1)	(5)
Other income	31	41
Interest expense	(212)	(196)
Other expenses	(10)	(13)
Income from continuing operations before income taxes	115	281
Income tax expense	0	65
Income from continuing operations	115	216
Loss from discontinued operations, net of tax	(1)	(2)
Net income	114	214
Dividends on preferred and preference stock of utility	19	14
Other noncontrolling interests	2	0
Net income attributable to Edison International common shareholders	93	200
Amounts attributable to Edison International common shareholders:
Income from continuing operations, net of tax	94	202
Loss from discontinued operations, net of tax	(1)	(2)
Net income attributable to Edison International common shareholders	$ 93	$ 200
Basic earnings (loss) per common share attributable to Edison International common shareholders:
Weighted-average shares of common stock outstanding (in shares)	326	326
Continuing operations (in dollars per share)	$ 0.28	$ 0.62
Discontinued operations (in dollars per share)	$ 0.00	$ (0.01)
Total (in dollars per share)	$ 0.28	$ 0.61
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	328
Continuing operations (in dollars per share)	$ 0.28	$ 0.62
Discontinued operations (in dollars per share)	$ 0.00	$ (0.01)
Total (in dollars per share)	$ 0.28	$ 0.61
Dividends declared per common share (in dollars per share)	$ 0.325	$ 0.32