Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 880	$ 286
Trade receivables, net	1,188	1,270
Income taxes receivable	0	456
Inventories	726	690
Other current assets	644	581
Total current assets	3,438	3,283
Property, plant and equipment, net	35,340	34,167
Goodwill	5,016	4,996
Investments and restricted cash and investments	2,348	1,948
Regulatory assets	2,826	2,835
Other assets	532	489
Total assets	49,500	47,718
Current liabilities:
Accounts payable	1,007	989
Accrued employee expenses	246	155
Accrued interest	349	326
Accrued property, income and other taxes	531	340
Derivative contracts	150	160
Short-term debt	76	865
Current portion of long-term debt	1,224	1,198
Other current liabilities	579	514
Total current liabilities	4,162	4,547
Regulatory liabilities	1,699	1,663
MEHC senior debt	4,621	4,621
Subsidiary debt	14,500	13,253
Deferred income taxes	7,383	7,076
Other long-term liabilities	2,215	2,293
Total liabilities	34,580	33,453
Commitments and contingencies (Note 10)
MEHC shareholders' equity:
Common stock - 115 shares authorized, no par value, 75 shares issued and outstanding	0	0
Additional paid-in capital	5,423	5,423
Retained earnings	9,967	9,310
Accumulated other comprehensive loss, net	(639)	(641)
Total MEHC shareholders' equity	14,751	14,092
Noncontrolling interests	169	173
Total equity	14,920	14,265
Total liabilities and equity	$ 49,500	$ 47,718