Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating revenue:
Energy	$ 2,319	$ 2,356	$ 4,957	$ 5,011
Real estate	389	290	598	479
Total operating revenue	2,708	2,646	5,555	5,490
Energy:
Cost of sales	750	840	1,692	1,812
Operating expense	674	626	1,300	1,261
Depreciation and amortization	357	332	705	664
Real estate	359	271	574	472
Total operating costs and expenses	2,140	2,069	4,271	4,209
Operating income	568	577	1,284	1,281
Other income (expense):
Interest expense	(296)	(303)	(586)	(606)
Capitalized interest	13	9	22	18
Interest and dividend income	2	6	5	9
Other, net	18	20	51	46
Total other income (expense)	(263)	(268)	(508)	(533)
Income before income tax expense and equity income	305	309	776	748
Income tax expense	37	76	141	187
Equity income	19	7	31	14
Net income	287	240	666	575
Net income attributable to noncontrolling interests	5	4	9	8
Net income attributable to MEHC	$ 282	$ 236	$ 657	$ 567