Employee Benefit Plans - PacifiCorp - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 664	$ 736
Defined Benefit Plan, Plan Assets, Contributions by Employer	2	8
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	9	8
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	122	(38)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(55)	(50)
Ending balance	742	664	$ 736
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	672	721
Defined Benefit Plan, Service Cost	8	9	9
Defined Benefit Plan, Interest Cost	27	24	29
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	9	8
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	12	(40)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(55)	(50)
Defined Benefit Plan, Benefit Obligation	672	721	721	$ 673	$ 672
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan				69	(8)
Assets for Plan Benefits, Defined Benefit Plan				76	5
Other current liabilities				0	0
Liability, Defined Benefit Plan, Noncurrent				(7)	(13)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				69	(8)
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				252	256
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	297	332
Defined Benefit Plan, Plan Assets, Contributions by Employer	1	1
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	5	5
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	55	(16)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(24)	(25)
Ending balance	334	297	332
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	298	331
Defined Benefit Plan, Service Cost	2	2	2
Defined Benefit Plan, Interest Cost	12	11	14
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	5	5
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	11	(26)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(24)	(25)
Defined Benefit Plan, Benefit Obligation	298	331	331	304	298
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan				30	(1)
Assets for Plan Benefits, Defined Benefit Plan				30	0
Other current liabilities				0	0
Liability, Defined Benefit Plan, Noncurrent				0	(1)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				30	(1)
PacifiCorp [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				57	52
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,396	2,761
Defined Benefit Plan, Plan Assets, Contributions by Employer	12	38
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	456	(147)
Defined Benefit Plan, Plan Assets, Payment for Settlement	(22)	(119)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(186)	(137)
Ending balance	2,656	2,396	2,761
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,718	3,006
Defined Benefit Plan, Service Cost	16	21	24
Defined Benefit Plan, Interest Cost	111	105	116
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	242	(160)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(186)	(137)
Defined Benefit Plan, Benefit Obligation	2,718	3,006	3,006	2,878	2,718
Defined Benefit Plan, Accumulated Benefit Obligation				2,867	2,709
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan				(222)	(322)
Assets for Plan Benefits, Defined Benefit Plan				73	20
Other current liabilities				(13)	(13)
Liability, Defined Benefit Plan, Noncurrent				(282)	(329)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				(222)	(322)
UNITED STATES | PacifiCorp [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	942	1,111
Defined Benefit Plan, Plan Assets, Contributions by Employer	4	4
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	181	(52)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	(52)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(91)	(69)
Ending balance	1,036	942	1,111
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	1,105	1,251
Defined Benefit Plan, Service Cost	0	0	0
Defined Benefit Plan, Interest Cost	44	43	49
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	109	(68)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(91)	(69)
Defined Benefit Plan, Benefit Obligation	$ 1,105	$ 1,251	$ 1,251	1,167	1,105
Defined Benefit Plan, Accumulated Benefit Obligation				1,167	1,105
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan				(131)	(163)
Assets for Plan Benefits, Defined Benefit Plan				7	3
Other current liabilities				(4)	(4)
Liability, Defined Benefit Plan, Noncurrent				(134)	(162)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				(131)	(163)
Cash and Cash Equivalents [Member] | PacifiCorp [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				0	1
Other Noncurrent Assets [Member] | PacifiCorp [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				$ 57	$ 51