Supplemental Cash Flow Disclosures - PacifiCorp (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		$ 627	$ 935
Interest paid, net of amounts capitalized		1,713	1,715	$ 1,673
Income Taxes Paid, Net	[1]	(780)	(540)	(1,016)
Accruals related to property, plant and equipment additions		823	653	547
Restricted Cash and Cash Equivalents, Current		227	327
Restricted Cash and Cash Equivalents, Noncurrent		29	21
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		883	1,283	1,003	$ 1,332
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		77	14
Interest paid, net of amounts capitalized		347	350	350
Income Taxes Paid, Net		144	340	201
Accruals related to property, plant and equipment additions		184	147	101
Restricted Cash and Cash Equivalents, Current		13	13
Restricted Cash and Cash Equivalents, Noncurrent		2	2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 92	$ 29	$ 33	$ 28

[1] Includes $884 million, $636 million and $1.1 billion of income taxes received from Berkshire Hathaway in 2018, 2017 and 2016, respectively.