Summary of Significant Accounting Policies - AFUDC (Details)				12 Months Ended
	Oct. 15, 2020	Oct. 01, 2020	Dec. 19, 2017	Dec. 31, 2021
Regulatory Assets [Line Items]
Public Utilities, Property, Plant and Equipment, Non-project Electric Utility Plant, Estimated Useful Life Average				30 years
Subsidiaries [Member]
Regulatory Assets [Line Items]
Public Utilities, Approved Debt Capital Structure, Percentage			7.60%
Subsidiaries [Member] | Electricity, US Regulated [Member]
Regulatory Assets [Line Items]
Public Utilities, Approved Debt Capital Structure, Percentage	7.39%
Subsidiaries [Member] | Natural Gas [Member]
Regulatory Assets [Line Items]
Public Utilities, Approved Debt Capital Structure, Percentage		7.39%