Employee Benefit Plans Employee Benefit Plans - PacifiCorp - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 40	$ 39	$ 39
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	2.94%	3.54%	3.06%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	3.02%	3.56%	2.72%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 13
Defined Benefit Plan, Plan Assets, Payment for Settlement	$ 22	$ 119
Pension Plan [Member] | UNITED STATES | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.70%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 4
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	52
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	252	256
Supplemental Employee Retirement Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	57	52
Cash and Cash Equivalents [Member] | Supplemental Employee Retirement Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	0	1
Other Noncurrent Assets [Member] | Supplemental Employee Retirement Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	$ 57	$ 51