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Investments, Loans and Long-Term Receivables - Dakota Access, LLC and Energy Transfer Crude Oil, Company, LLC (ETCO) (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Apr. 01, 2024 USD ($) | Oct. 31, 2024 state | Mar. 31, 2024 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($)
Dakota Access and ETCO |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Repayments of debt |  |  | $ 250 |  |
Percentage of ownership interest | 25.00% |  |  | 25.00% |
Capital contribution |  |  | $ 171 |  |
Deferred distributions |  |  |  |  | $ 79
Maximum exposure, undiscounted |  |  |  | $ 215 |
Equity investments |  |  |  | 875 |
Dakota Access, LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Number of states | state |  | 13 |  |  |
Scheduled interest payments annually |  |  |  | 10 |
Dakota Access, LLC | Senior Notes |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Debt issued and guaranteed |  |  |  | $ 850 |
Dakota Access, LLC | Senior Notes | Dakota Senior Notes |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Repayments of debt | $ 1,000 |  |  |  |

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