Segment Information (LLC) (Tables) (MidAmerican Funding, LLC and Subsidiaries [Domain])

12 Months Ended

Dec. 31, 2012

MidAmerican Funding, LLC and Subsidiaries [Domain]

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

MidAmerican Funding has identified three reportable operating segments: regulated electric, regulated gas and nonregulated energy. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. The nonregulated energy segment derives most of its revenue from nonregulated retail electric and gas activities. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the nonregulated subsidiaries of MidAmerican Funding not engaged in the energy business and parent company interest expense. Refer to Note 10 for a discussion of income tax method changes and related items affecting income tax (benefit) expense for the regulated electric and gas operating segments.

The following tables provide information on an operating segment basis (in millions):

	Years Ended December 31,
	2012			2011			2010
Operating revenue:
Regulated electric	$	1,694		$	1,662		$	1,779
Regulated gas	659			769			852
Nonregulated energy	889			1,070			1,179
Other	5			2			5
Total operating revenue	$	3,247		$	3,503		$	3,815
Depreciation and amortization:
Regulated electric	$	356		$	301		$	309
Regulated gas	36			35			35
Total depreciation and amortization	$	392		$	336		$	344
Operating income:
Regulated electric	$	270		$	294		$	319
Regulated gas	47			66			64
Nonregulated energy	53			69			76
Other	(1		)	(1		)	1
Total operating income	$	369		$	428		$	460
Fixed charges:
Regulated electric	$	123		$	133		$	136
Regulated gas	15			18			18
Other	24			25			36
Total fixed charges	$	162		$	176		$	190
Income tax (benefit) expense:
Regulated electric	$	(129	)	$	(61	)	$	(84	)
Regulated gas	7			16			5
Nonregulated energy	23			28			30
Other	(9		)	(9		)	(12		)
Total income tax (benefit) expense	$	(108	)	$	(26	)	$	(61	)
Net income attributable to MidAmerican Funding:
Regulated electric	$	297		$	243		$	268
Regulated gas	28			36			45
Nonregulated energy	29			39			44
Other	(12		)	(14		)	(17		)
Total net income attributable to MidAmerican Funding	$	342		$	304		$	340
Utility construction expenditures:
Regulated electric	$	588		$	505		$	295
Regulated gas	57			60			42
Total utility construction expenditures	$	645		$	565		$	337

	As of December 31,
	2012		2011		2010
Total assets:
Regulated electric	$	11,089	$	10,207	$	8,971
Regulated gas	1,280		1,238		1,111
Nonregulated energy	132		135		197
Other	29		25		31
Total assets	$	12,530	$	11,605	$	10,310

Schedule of Goodwill [Table Text Block]

Goodwill by reportable segment as of December 31, 2012 and 2011, was as follows (in millions):

Regulated electric	$	1,191
Regulated gas	79
Total	$	1,270