Commitments and Guarantees Schdule of Long term contracts for purchase of electric power (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) MW	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Priest Rapids and Wanapum [Member]
Long-term Contract for Purchase of Electric Power [Line Items]
Revenue Bonds issued by the Public Utility Districts	$ 1,976
PGE Share of Output	8.60%
PGE Share of Capacity | MW	163
commitment costs	$ 26	$ 25	$ 21
Wells [Member]
Long-term Contract for Purchase of Electric Power [Line Items]
Revenue Bonds issued by the Public Utility Districts	$ 496
PGE Share of Output	17.60%
PGE Share of Capacity | MW	105
commitment costs	$ 13	$ 23	$ 16