v3.25.2
Revenue - Summary of Disaggregates TEC Revenue by Major Source (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Disaggregation Of Revenue [Line Items]        
Total electric revenue $ 839 $ 672 $ 1,488 $ 1,220
Total revenue 839 672 1,488 1,220
Residential [Member]        
Disaggregation Of Revenue [Line Items]        
Total electric revenue 462 385 798 689
Commercial [Member]        
Disaggregation Of Revenue [Line Items]        
Total electric revenue 209 177 381 332
Industrial [Member]        
Disaggregation Of Revenue [Line Items]        
Total electric revenue 49 42 95 82
Regulatory Deferrals [Member]        
Disaggregation Of Revenue [Line Items]        
Total electric revenue 6 (28) 16 (50)
Unbilled Revenue [Member]        
Disaggregation Of Revenue [Line Items]        
Total electric revenue 26 24 30 27
Other [Member]        
Disaggregation Of Revenue [Line Items]        
Total electric revenue $ 87 $ 72 $ 168 $ 140