v3.25.3
Revenue Recognition - Schedule of Contract With Customers (Details)
$ in Millions
9 Months Ended
Sep. 30, 2025
USD ($)
Accounts Receivable  
Opening balance as of December 31, 2024 $ 666
Closing balance as of September 30, 2025 703
Increase (decrease) in accounts receivable 37
Accrued Unbilled Revenues  
Opening balance as of December 31, 2024 521
Closing balance as of September 30, 2025 448
Increase (decrease) in other accrued unbilled revenues (73)
Houston Electric  
Accounts Receivable  
Opening balance as of December 31, 2024 284
Closing balance as of September 30, 2025 422
Increase (decrease) in accounts receivable 138
Accrued Unbilled Revenues  
Opening balance as of December 31, 2024 137
Closing balance as of September 30, 2025 270
Increase (decrease) in other accrued unbilled revenues 133
CERC  
Accounts Receivable  
Opening balance as of December 31, 2024 326
Closing balance as of September 30, 2025 218
Increase (decrease) in accounts receivable (108)
Accrued Unbilled Revenues  
Opening balance as of December 31, 2024 338
Closing balance as of September 30, 2025 119
Increase (decrease) in other accrued unbilled revenues $ (219)