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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2024
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense | Components of income tax expense are as follows (in millions):
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
Current income tax expense: |  |  |  |  |
State income tax | $ | 2 |  |  | $ | 2 |  |  | $ | 1 |
Canadian federal and provincial income and withholding taxes | 193 |  |  | 143 |  |  | 83 |
Total current income tax expense | $ | 195 |  |  | $ | 145 |  |  | $ | 84 |
Deferred income tax expense/(benefit): |  |  |  |  |
Federal income tax | $ | 31 |  |  | $ | 55 |  |  | $ | 46 |
State income tax | 6 |  |  | 13 |  |  | 11 |
Canadian federal and provincial income tax | (28) |  |  | (24) |  |  | 105 |
Total deferred income tax expense | $ | 9 |  |  | $ | 44 |  |  | $ | 162 |
Total income tax expense | $ | 204 |  |  | $ | 189 |  |  | $ | 246 |
Schedule of Differences Between Tax Expense based on the Statutory Federal Income Tax Rate and the Effective Income Tax Expense | The difference between income tax expense based on the statutory federal income tax rate and our effective income tax expense is summarized as follows (in millions):
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
Income before tax | $ | 1,274 |  |  | $ | 1,614 |  |  | $ | 1,409 |
Net income attributable to noncontrolling interests | (967) |  |  | (1,227) |  |  | (995) |
Income taxes attributable to noncontrolling interests | (167) |  |  | (121) |  |  | (189) |
| $ | 140 |  |  | $ | 266 |  |  | $ | 225 |
Federal statutory income tax rate | 21 | % |  | 21 | % |  | 21 | %
Income tax expense at statutory rate | $ | 29 |  |  | $ | 56 |  |  | $ | 47 |
Deferred tax rate adjustment | 6 |  |  | 9 |  |  | 7 |
State income tax, net of federal benefit | 2 |  |  | 3 |  |  | 3 |
Income taxes attributable to noncontrolling interests: |  |  |  |  |
Canadian federal and provincial income tax | 113 |  |  | 119 |  |  | 188 |
Canadian withholding tax | 52 |  |  | — |  |  | — |
State income tax | 2 |  |  | 2 |  |  | 1 |
Total income tax expense | $ | 204 |  |  | $ | 189 |  |  | $ | 246 |
Schedule of Deferred Tax Assets and Liabilities | Deferred tax assets and liabilities are aggregated by the applicable tax paying entity and jurisdiction and result from the following (in millions):
| December 31,
| 2024 |  | 2023
Deferred tax assets: |  |  |
Investment in partnerships | $ | 436 |  |  | $ | 523 |
Net operating losses | 784 |  |  | 716 |
Derivative instruments | 19 |  |  | — |
Lease liabilities | 46 |  |  | 40 |
Other | 43 |  |  | 45 |
Total deferred tax assets | 1,328 |  |  | 1,324 |
Deferred tax liabilities: |  |  |
Property and equipment in excess of tax values | (525) |  |  | (573) |
Derivative instruments | — |  |  | (6) |
Lease assets | (44) |  |  | (38) |
Other | (3) |  |  | (3) |
Total deferred tax liabilities | (572) |  |  | (620) |
Net deferred tax assets | $ | 756 |  |  | $ | 704 |
Balance sheet classification of deferred tax assets/(liabilities): |  |  |
Deferred tax asset | $ | 1,220 |  |  | $ | 1,239 |
Other long-term liabilities and deferred credits | (464) |  |  | (535) |
| $ | 756 |  |  | $ | 704 |

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