Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating revenue:
Energy	$ 10,181	$ 10,107	$ 10,167
Real estate	992	1,020	1,037
Total operating revenue	11,173	11,127	11,204
Energy:
Cost of sales	3,648	3,890	3,904
Operating expense	2,544	2,470	2,571
Depreciation and amortization	1,329	1,262	1,238
Real estate	968	1,003	1,026
Total operating costs and expenses	8,489	8,625	8,739
Operating income	2,684	2,502	2,465
Other income (expense):
Interest expense	(1,196)	(1,225)	(1,275)
Capitalized interest	40	54	41
Interest and dividend income	14	24	38
Other, net	51	110	146
Total other income (expense)	(1,091)	(1,037)	(1,050)
Income before income tax expense and equity income	1,593	1,465	1,415
Income tax expense	294	198	282
Equity income	53	43	55
Net income	1,352	1,310	1,188
Net income attributable to noncontrolling interests	21	72	31
Net income attributable to MEHC	$ 1,331	$ 1,238	$ 1,157