Discontinued Operations Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2017

MidAmerican Energy Company [Member] | Unregulated Retail Services [Member]

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Disposal Groups, Including Discontinued Operations [Table Text Block]

Significant line items constituting pre-tax income from discontinued operations and total cash flows from operating activities for the years ended December 31 are as follows (in millions):

	2015
Operating revenue	$	905
Cost of sales	$	854
Cash flows from operating activities	$	30