Employee Benefit Plans Employee Benefit Plans - PacifiCorp (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 3	$ 4	$ 5
Interest cost	4	8	10	14
Expected return on plan assets	(7)	(10)	(16)	(20)
Net amortization	(3)	(1)	(4)	(3)
Net periodic benefit cost	(3)	0	(6)	(4)
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1	1
Interest cost	2	3	5	6
Expected return on plan assets	(3)	(5)	(7)	(10)
Net amortization	0	0	0	0
Net periodic benefit cost	0	(1)	(1)	(3)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	4	7	8
Interest cost	23	28	46	55
Expected return on plan assets	(35)	(39)	(70)	(77)
Net amortization	8	7	17	16
Net periodic benefit cost	0	0	0	2
UNITED STATES | PacifiCorp [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	9	11	18	22
Expected return on plan assets	(14)	(16)	(28)	(33)
Net amortization	4	3	9	6
Net periodic benefit cost	$ (1)	$ (2)	$ (1)	$ (5)