Commitments and Contingencies Environmental Requirements - Water and Waste (Details) - Federal Clean Water Act Section 316 (b) [Member] $ in Millions	Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Minimum number of plants which could be required to make improvements to reduce entrainment	2
Capital Addition Purchase Commitments [Member]
Loss Contingencies [Line Items]
Liability for estimated cost to comply with regulation	$ 4
Liability for estimated cost to comply with impingement and entrainment regulation	$ 4