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Revenue Recognition and Allowance for Credit Losses - Schedule of Contract Assets and Liabilities (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2024 USD ($)
Accounts Receivable |
Opening balance as of December 31, 2023 | $ 652
Closing balance as of June 30, 2024 | 598
Increase (decrease) | (54)
Accrued Unbilled Revenues |
Opening balance as of December 31, 2023 | 516
Closing balance as of June 30, 2024 | 346
Increase (decrease) in other accrued unbilled revenues | (170)
Contract Liabilities |
Opening balance as of December 31, 2023 | 2
Closing balance as of June 30, 2024 | 6
Increase (decrease) in contract liabilities | 4
Revenue recognized included in the opening contract liability for the period | 2
Houston Electric |
Accounts Receivable |
Opening balance as of December 31, 2023 | 275
Closing balance as of June 30, 2024 | 351
Increase (decrease) | 76
Accrued Unbilled Revenues |
Opening balance as of December 31, 2023 | 142
Closing balance as of June 30, 2024 | 172
Increase (decrease) in other accrued unbilled revenues | 30
Contract Liabilities |
Opening balance as of December 31, 2023 | 2
Closing balance as of June 30, 2024 | 6
Increase (decrease) in contract liabilities | 4
Revenue recognized included in the opening contract liability for the period | 2
CERC |
Accounts Receivable |
Opening balance as of December 31, 2023 | 330
Closing balance as of June 30, 2024 | 209
Increase (decrease) | (121)
Accrued Unbilled Revenues |
Opening balance as of December 31, 2023 | 329
Closing balance as of June 30, 2024 | 128
Increase (decrease) in other accrued unbilled revenues | $ (201)

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