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Other - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 03, 2022
Dec. 31, 2021
Public Utilities General Disclosures [Line Items]        
Sales to TEC $ 0 $ 0    
Sales to Non member 0 $ 0    
Revolving Credit Facility        
Public Utilities General Disclosures [Line Items]        
Line of credit outstanding 0     $ 0
Revolving Credit Facility | Through March 3, 2022 [Member]        
Public Utilities General Disclosures [Line Items]        
Credit facility, maximum borrowing capacity     $ 500,000,000  
Revolving Credit Facility | March 4, 2022 through February 28, 2025 [Member]        
Public Utilities General Disclosures [Line Items]        
Credit facility, maximum borrowing capacity 400,000,000      
Letter of Credit [Member]        
Public Utilities General Disclosures [Line Items]        
Line of credit outstanding $ 500,000     $ 500,000