Employee Benefit Plans - PacifiCorp - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.59%		3.24%		4.21%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.24%		4.21%		3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.42%		6.39%		6.44%
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.50%		3.20%		4.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.20%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.92%		6.86%		6.86%
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	2.25%		2.94%		3.54%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.65%		3.02%		3.56%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%		3.32%		4.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	2.75%		2.75%		2.75%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.32%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.94%		6.48%		6.36%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	2.75%		2.75%		2.75%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.25%		2.94%		3.54%
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.40%		2.70%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.50%		3.25%		4.25%
Interest crediting rates for cash balance plan	0.82%	[1]	2.27%	[2]	3.40%	[3]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.25%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.50%		7.00%		7.00%
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Union pension plan participant [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	1.42%		2.16%
Interest Crediting Rates for Cash Balance Plan, Fourth Year					3.25%
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Nonunion pension plan participant [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	0.82%		2.27%		3.40%
Interest Crediting Rates for Cash Balance Plan, Fourth Year					3.15%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.00%		2.10%

[1] 2020 Cash Balance Interest Crediting Rate assumption is 0.82% for 2021-2022 and 2.00% for 2023 and all future years for nonunion participants and 1.42% for 2021-2022 and 2.40% for 2023+ for union participants.

[2] 2019 Cash Balance Interest Crediting Rate assumption was 2.27% for 2020-2021 and 2.10% for 2022 and all future years for nonunion participants and 2.16% for 2020-2021 and 2.70% for 2022+ for union participants.

[3] 2018 Cash Balance Interest Crediting Rate assumption was 3.40% for 2019 and all future years for nonunion participants and 3.15% for 2019-2020 and 3.25% for 2021+ for union participants.