Regulatory Matters - PacifiCorp - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	35.00%
Regulatory liabilities		$ 211	$ 160
Regulatory liabilities, noncurrent		7,100	7,346
Regulatory Liabilities		7,311	7,506
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[1]	$ 2,370	2,426
Regulatory liability amortization period years	[1]	26.8240506329114
Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 3,611	$ 3,923
Regulatory liability amortization period years	[2]	Various
PacifiCorp [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	35.00%
Regulatory liabilities		$ 56	$ 77
Regulatory liabilities, noncurrent		2,913	2,978
Regulatory Liabilities		2,969	3,055
PacifiCorp [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liabilities, noncurrent		1,019	994
Regulatory Liabilities	[3]	$ 1,019	994
Regulatory liability amortization period years	[3]	26 years
PacifiCorp [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[4]	$ 1,653	1,803
Regulatory liability amortization period years	[4]	Various
PacifiCorp [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 297	$ 258
Regulatory liability amortization period years		Various
Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%
Tax Cuts and Jobs Act of 2017 [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[5]	$ 5,950

[1] Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.

[2] (1)Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. See Note 12 for further discussion of 2017 Tax Reform impacts.

[3] (1)Amounts represent estimated costs, as accrued through depreciation rates, of removing property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.

[4] (2)Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable of being passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.

[5] Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.