Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating revenue:
Energy	$ 2,638	$ 2,655
Real estate	209	189
Total operating revenue	2,847	2,844
Energy:
Cost of sales	942	972
Operating expense	626	635
Depreciation and amortization	348	332
Real estate	215	201
Total operating costs and expenses	2,131	2,140
Operating income	716	704
Other income (expense):
Interest expense	(290)	(303)
Capitalized interest	9	9
Interest and dividend income	3	3
Other, net	33	26
Total other income (expense)	(245)	(265)
Income before income tax expense and equity income	471	439
Income tax expense	104	111
Equity income	12	7
Net income	379	335
Net income attributable to noncontrolling interests	4	4
Net income attributable to MEHC	$ 375	$ 331