Commitments and Contingencies (Details) - USD ($) $ in Millions			1 Months Ended
	Sep. 06, 2019	Feb. 12, 2018	Apr. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Litigation and Regulatory Matters
Loss Contingencies [Line Items]
Contingent liabilities				$ 23.8	$ 29.2
Indirect Tax Audits
Loss Contingencies [Line Items]
Contingent liabilities				$ 2.1	$ 1.8
Verde Energy USA Ohio, LLC
Loss Contingencies [Line Items]
Damages sought	$ 1.7
Damages penalty	$ 0.7
Settled Litigation | Albrecht v. Oasis Power, LLC
Loss Contingencies [Line Items]
Damages sought		$ 7.0
Subsequent Event | Maine Public Utilities Commission Investigation
Loss Contingencies [Line Items]
Settlement			$ 1.0