Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating revenue:
Energy	$ 2,636	$ 2,535	$ 7,593	$ 7,546
Real estate	372	285	970	764
Total operating revenue	3,008	2,820	8,563	8,310
Energy:
Cost of sales	884	897	2,576	2,709
Operating expense	653	604	1,953	1,865
Depreciation and amortization	367	324	1,072	988
Real estate	347	267	921	739
Total operating costs and expenses	2,251	2,092	6,522	6,301
Operating income	757	728	2,041	2,009
Other income (expense):
Interest expense	(298)	(301)	(884)	(907)
Capitalized interest	15	13	37	31
Interest and dividend income	3	2	8	11
Other, net	35	17	86	63
Total other income (expense)	(245)	(269)	(753)	(802)
Income before income tax expense and equity income	512	459	1,288	1,207
Income tax expense	47	68	188	255
Equity income	30	28	61	42
Net income	495	419	1,161	994
Net income attributable to noncontrolling interests	7	7	16	15
Net income attributable to MEHC shareholders	$ 488	$ 412	$ 1,145	$ 979