Related Party Transactions Related Party Transactions PacifiCorp (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
PacifiCorp [Member] \| BHE [Member]
Related Party Transaction [Line Items]
Related party transaction, cash paid for income taxes, net	$ 21	$ 205

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Period Type:	duration