Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 892	$ 776
Trade receivables, net	1,275	1,380
Income taxes receivable	20	336
Inventories	759	766
Other current assets	581	612
Total current assets	3,527	3,870
Property, plant and equipment, net	38,271	37,614
Goodwill	5,065	5,120
Regulatory assets	2,747	2,840
Investments and restricted cash and investments	3,636	2,392
Other assets	635	631
Total assets	53,881	52,467
Current liabilities:
Accounts payable	1,082	1,214
Accrued interest	352	330
Accrued property, income and other taxes	510	299
Accrued employee expenses	244	188
Short-term debt	47	887
Current portion of long-term debt	1,288	1,137
Other current liabilities	720	695
Total current liabilities	4,243	4,750
Regulatory liabilities	1,823	1,749
MEHC senior debt	4,371	4,621
Subsidiary debt	16,275	14,977
Deferred income taxes	8,159	7,903
Other long-term liabilities	2,486	2,557
Total liabilities	37,357	36,557
Commitments and contingencies (Note 11)
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	11,531	10,782
Accumulated other comprehensive loss, net	(568)	(463)
Total MEHC shareholders' equity	16,386	15,742
Noncontrolling interests	138	168
Total equity	16,524	15,910
Total liabilities and equity	$ 53,881	$ 52,467