Commitments and Contingencies - Investment Arrangements (Details) - Proportionately Consolidated Non-Controlled Joint Venture $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Other Commitments [Line Items]
Payments for advance to affiliate	$ 0.7
Joint Ventures That Provide Electrical Transmission Infrastructure Services | Minimum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	85.00%
Joint Ventures That Provide Electrical Transmission Infrastructure Services | Maximum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	90.00%
Joint Venture Civil Construction Project | Minimum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	30.00%
Joint Venture Civil Construction Project | Maximum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	50.00%