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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Current portion of income tax provision: |  |  |  |  |  |
Federal |  | $ 0 | $ (14) | $ 0 | $ (10) |
State |  | (10) | (10) | (22) | (21) |
Total current portion |  | (10) | (24) | (22) | (31) |
Deferred portion of income tax provision: |  |  |  |  |  |
Federal |  | (4) | 11 | (8) | 4 |
State |  | (1) | 0 | (6) | 4 |
Total deferred portion |  | (5) | 11 | (14) | 8 |
Total provision for income taxes |  | (15) | $ (13) | (36) | $ (23) |
Deferred tax liabilities: |  |  |  |  |  |
Attributable to investment in OTA | [1] | 450 |  | 450 |  | $ 436
Attributable to property, plant and equipment |  | 143 |  | 143 |  | 138
Attributable to investments in other entities |  | 4 |  | 4 |  | 4
Other |  | 84 |  | 84 |  | 83
Total deferred tax liabilities |  | 681 |  | 681 |  | 661
Deferred tax assets: |  |  |  |  |  |
Net operating loss carryovers | [2] | 52 |  | 52 |  | 46
Temporary differences related to Texas Margin Tax |  | 4 |  | 4 |  | 4
Total deferred tax assets |  | 56 |  | 56 |  | 50
Total net deferred tax liabilities |  | $ 625 |  | $ 625 |  | $ 611
[1] | Represents the deferred tax liability balance held by our wholly owned subsidiary, OTA Holdings, Inc. ("OTA"), which we acquired in March 2020.
[2] | The loss amount presented as of June 30, 2024 has an indefinite carryover period. All losses are subject to limitations on their utilization.

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