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v3.23.3

Fair Value Measurements (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Carrying amount |  |
Liabilities |  |
Carrying amount or fair value | $ 18,263 | $ 16,338
Carrying amount | Houston Electric |  |
Liabilities |  |
Carrying amount or fair value | 7,665 | 6,353
Carrying amount | CERC |  |
Liabilities |  |
Carrying amount or fair value | 4,243 | 4,826
Fair value |  |
Liabilities |  |
Carrying amount or fair value | 16,283 | 14,990
Fair value | Houston Electric |  |
Liabilities |  |
Carrying amount or fair value | 6,397 | 5,504
Fair value | CERC |  |
Liabilities |  |
Carrying amount or fair value | 3,908 | 4,637
Fair Value, Recurring |  |
Assets |  |
Equity securities | 566 | 510
Investments, including money market funds | 31 | 32
Total assets | 598 | 554
Liabilities |  |
Total liabilities | 630 | 578
Fair Value, Recurring | Houston Electric |  |
Assets |  |
Investments, including money market funds | 14 | 17
Total assets | 14 | 17
Fair Value, Recurring | CERC |  |
Assets |  |
Investments, including money market funds | 14 | 14
Total assets | 15 | 23
Fair Value, Recurring | Interest rate derivatives |  |
Assets |  |
Derivative assets | 0 | 1
Fair Value, Recurring | Natural gas derivatives |  |
Assets |  |
Derivative assets | 1 | 11
Fair Value, Recurring | Natural gas derivatives | CERC |  |
Assets |  |
Derivative assets | 1 | 9
Fair Value, Recurring | Indexed debt securities derivative |  |
Liabilities |  |
Indexed debt securities derivative | 630 | 578
Level 1 | Fair Value, Recurring |  |
Assets |  |
Equity securities | 566 | 510
Investments, including money market funds | 31 | 32
Total assets | 597 | 542
Liabilities |  |
Total liabilities | 0 | 0
Level 1 | Fair Value, Recurring | Houston Electric |  |
Assets |  |
Investments, including money market funds | 14 | 17
Total assets | 14 | 17
Level 1 | Fair Value, Recurring | CERC |  |
Assets |  |
Investments, including money market funds | 14 | 14
Total assets | 14 | 14
Level 1 | Fair Value, Recurring | Interest rate derivatives |  |
Assets |  |
Derivative assets | 0 | 0
Level 1 | Fair Value, Recurring | Natural gas derivatives |  |
Assets |  |
Derivative assets | 0 | 0
Level 1 | Fair Value, Recurring | Natural gas derivatives | CERC |  |
Assets |  |
Derivative assets | 0 | 0
Level 1 | Fair Value, Recurring | Indexed debt securities derivative |  |
Liabilities |  |
Indexed debt securities derivative | 0 | 0
Level 2 | Fair Value, Recurring |  |
Assets |  |
Equity securities | 0 | 0
Investments, including money market funds | 0 | 0
Total assets | 1 | 12
Liabilities |  |
Total liabilities | 630 | 578
Level 2 | Fair Value, Recurring | Houston Electric |  |
Assets |  |
Investments, including money market funds | 0 | 0
Total assets | 0 | 0
Level 2 | Fair Value, Recurring | CERC |  |
Assets |  |
Investments, including money market funds | 0 | 0
Total assets | 1 | 9
Level 2 | Fair Value, Recurring | Interest rate derivatives |  |
Assets |  |
Derivative assets | 0 | 1
Level 2 | Fair Value, Recurring | Natural gas derivatives |  |
Assets |  |
Derivative assets | 1 | 11
Level 2 | Fair Value, Recurring | Natural gas derivatives | CERC |  |
Assets |  |
Derivative assets | 1 | 9
Level 2 | Fair Value, Recurring | Indexed debt securities derivative |  |
Liabilities |  |
Indexed debt securities derivative | 630 | 578
Level 3 | Fair Value, Recurring |  |
Assets |  |
Equity securities | 0 | 0
Investments, including money market funds | 0 | 0
Total assets | 0 | 0
Liabilities |  |
Total liabilities | 0 | 0
Level 3 | Fair Value, Recurring | Houston Electric |  |
Assets |  |
Investments, including money market funds | 0 | 0
Total assets | 0 | 0
Level 3 | Fair Value, Recurring | CERC |  |
Assets |  |
Investments, including money market funds | 0 | 0
Total assets | 0 | 0
Level 3 | Fair Value, Recurring | Interest rate derivatives |  |
Assets |  |
Derivative assets | 0 | 0
Level 3 | Fair Value, Recurring | Natural gas derivatives |  |
Assets |  |
Derivative assets | 0 | 0
Level 3 | Fair Value, Recurring | Natural gas derivatives | CERC |  |
Assets |  |
Derivative assets | 0 | 0
Level 3 | Fair Value, Recurring | Indexed debt securities derivative |  |
Liabilities |  |
Indexed debt securities derivative | $ 0 | $ 0

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