Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Operating revenue:
Energy	$ 2,778	$ 2,636	$ 8,048	$ 7,593
Real estate	555	372	1,340	970
Total operating revenue	3,333	3,008	9,388	8,563
Energy:
Cost of sales	949	884	2,753	2,576
Operating expense	686	653	2,037	1,953
Depreciation and amortization	378	367	1,143	1,072
Real estate	502	347	1,223	921
Total operating costs and expenses	2,515	2,251	7,156	6,522
Operating income	818	757	2,232	2,041
Other income (expense):
Interest expense	(309)	(298)	(893)	(884)
Capitalized interest	18	15	58	37
Allowance for equity funds	17	20	55	55
Other, net	14	18	54	39
Total other income (expense)	(260)	(245)	(726)	(753)
Income before income tax expense and equity income	558	512	1,506	1,288
Income tax expense	49	47	272	188
Equity income	28	30	68	61
Net income	537	495	1,302	1,161
Net income attributable to noncontrolling interests	12	7	28	16
Net income attributable to MEHC shareholders	$ 525	$ 488	$ 1,274	$ 1,145