Unaudited Quarterly Operating Results (MEC) (Tables) (MidAmerican Energy Company and Subsidiaries [Member])

12 Months Ended

Dec. 31, 2012

MidAmerican Energy Company and Subsidiaries [Member]

Unaudited Quarterly Operating Results [Line Items]

Schedule of Quarterly Financial Information [Table Text Block]



	2012
	1^st Quarter		2^nd Quarter		3^rd Quarter		4^th Quarter
	(In millions)
Operating revenue	$	874	$	709	$	825	$	834
Operating income	92		81		139		58
Net income	74		81		140		60
Earnings on common stock	74		80		140		60

	2011
	1^st Quarter		2^nd Quarter		3^rd Quarter		4^th Quarter
	(In millions)
Operating revenue	$	979	$	804	$	866	$	852
Operating income	113		86		148		82
Net income	74		49		107		89
Earnings on common stock	74		48		107		89

Quarterly data reflect seasonal variations common to a Midwest utility. Net income for the second quarter of 2012 and the fourth quarter of 2011 reflects $18 million and $35 million, respectively, of income tax benefits recognized for changes in the tax accounting methods used to determine current income tax deductions. Refer to Note 10 for further discussion regarding MidAmerican Energy's changes in tax accounting methods.



	2012
	1^st Quarter		2^nd Quarter		3^rd Quarter		4^th Quarter
	(In millions)
Operating revenue	$	874	$	709	$	828	$	836
Operating income	91		81		139		58
Net income	71		78		136		58
Net income attributable to MidAmerican Funding	71		77		136		58



	2011
	1^st Quarter		2^nd Quarter		3^rd Quarter		4^th Quarter
	(In millions)
Operating revenue	$	979	$	805	$	866	$	853
Operating income	113		85		148		82
Net income	69		45		104		87
Net income attributable to MidAmerican Funding	69		44		104		87