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Unaudited Quarterly Operating Results Unaudited Quarterly Operating Results (Tables)

12 Months Ended

Dec. 31, 2015

MidAmerican Energy Company [Member]

Quarterly Operating Results [Line Items]

Schedule of Quarterly Financial Information [Table Text Block]



	2015
	1^st Quarter				2^nd Quarter				3^rd Quarter				4^th Quarter
	(In millions)
Operating revenue	$	946			$	793			$	920			$	748
Operating income	106				122				210				33
Net income	94				131				234				3

	2014
	1^st Quarter				2^nd Quarter				3^rd Quarter				4^th Quarter
	(In millions)
Operating revenue	$	1,225			$	769			$	862			$	884
Operating income	153				51				160				58
Net income	157				32				170				58

Quarterly data reflect seasonal variations common to a Midwest utility.

MidAmerican Funding, LLC and Subsidiaries [Domain]

Quarterly Operating Results [Line Items]

Schedule of Quarterly Financial Information [Table Text Block]



	2015
	1^st Quarter				2^nd Quarter				3^rd Quarter				4^th Quarter
	(In millions)
Operating revenue	$	951			$	797			$	921			$	751
Operating income	107				122				211				33
Net income	99				129				231				(1		)



	2014
	1^st Quarter				2^nd Quarter				3^rd Quarter				4^th Quarter
	(In millions)
Operating revenue	$	1,230			$	775			$	864			$	893
Operating income	153				51				161				58
Net income	155				30				168				56

Quarterly data reflect seasonal variations common to a Midwest utility.

Nevada Power Company [Member]

Quarterly Operating Results [Line Items]

Schedule of Quarterly Financial Information [Table Text Block]



	Three-Month Periods Ended
	March 31,				June 30,				September 30,				December 31,
	2015				2015				2015				2015

Operating revenues	$	459			$	607			$	878			$	458
Operating income	74				136				329				74
Net income	24				60				187				17


	Three-Month Periods Ended
	March 31,				June 30,				September 30,				December 31,
	2014				2014				2014				2014

Operating revenues	$	417			$	595			$	867			$	458
Operating income	55				145				307				34
Net income	6				62				168				(9		)

Sierra Pacific Power Company [Member]

Quarterly Operating Results [Line Items]

Schedule of Quarterly Financial Information [Table Text Block]



	Three-Month Periods Ended
	March 31,				June 30,				September 30,				December 31,
	2015				2015				2015				2015
Regulated electric operating revenue	$	196			$	201			$	228			$	185
Regulated natural gas operating revenue	50				26				18				43
Operating income	43				37				66				38
Net income	19				16				33				15


	Three-Month Periods Ended
	March 31,				June 30,				September 30,				December 31,
	2014				2014				2014				2014
Regulated electric operating revenue	$	177			$	179			$	233			$	190
Regulated natural gas operating revenue	44				21				18				42
Operating income	46				31				60				41
Net income	22				14				31				20