Supplemental Cash Flow Disclosures - PacifiCorp (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Cash Flow Statements, Captions [Line Items]
Interest paid, net of amounts capitalized		$ 1,764	$ 1,585	$ 1,073
Income Taxes Paid, Net	[1]	(1,666)	(635)	(1,105)
Accruals related to property, plant and equipment additions		718	1,143	661
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Interest paid, net of amounts capitalized		342	340	340
Income Taxes Paid, Net		40	161	120
Accruals related to property, plant and equipment additions		147	140	157
Accounts receivable related to property, plant and equipment sales		$ 40	$ 0	$ 0

[1] Includes $1.8 billion, $764 million and $1.2 billion of income taxes received from Berkshire Hathaway in 2015, 2014 and 2013, respectively.