Supplemental Cash Flow Disclosures - PacifiCorp (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Interest paid, net of amounts capitalized		$ 1,715	$ 1,673	$ 1,764
Income Taxes Paid, Net	[1]	(540)	(1,016)	(1,666)
Accruals related to property, plant and equipment additions		653	547	718
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Interest paid, net of amounts capitalized		350	350	342
Income Taxes Paid, Net		340	201	40
Accruals related to property, plant and equipment additions		147	101	147
Accounts receivable related to property, plant and equipment sales		$ 0	$ 0	$ 40

[1] Includes $636 million, $1.1 billion and $1.8 billion of income taxes received from Berkshire Hathaway in 2017, 2016 and 2015, respectively.