Commitments and Contingencies – Hydroelectric (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)
PacifiCorp [Member]
Hydroelectric [Line Items]
Capital expenditures required by hydroelectric licenses	$ 227,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member]
Hydroelectric [Line Items]
Dam removal cost limit	200,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | OREGON
Hydroelectric [Line Items]
Dam removal cost limit	184,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA
Hydroelectric [Line Items]
Dam removal cost limit	16,000,000
Additional dam removal costs, California bond measure	250,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | VARIOUS [Domain]
Hydroelectric [Line Items]
Klamath Relicensing and Settlement Costs	68,000,000
PacifiCorp [Member]
Hydroelectric [Line Items]
Capital expenditures required by hydroelectric licenses	227,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member]
Hydroelectric [Line Items]
Dam removal cost limit	200,000,000
Public Utilities Property Plant & Equipment, Number of Generating Facilities	4
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | OREGON
Hydroelectric [Line Items]
Dam removal cost limit	184,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA
Hydroelectric [Line Items]
Dam removal cost limit	16,000,000
Additional dam removal costs, California bond measure	$ 250,000,000