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Capital Accounts, Noncontrolling Interests (Details) - USD ($) $ in Millions |  |  | 9 Months Ended
--- | --- | --- | ---
Mar. 27, 2024 | Feb. 16, 2024 | Sep. 30, 2024 | Sep. 30, 2023
Noncontrolling Interest |  |  |  |
Payments To Acquire Additional Interest In Subsidiaries As An Equity Transaction |  | $ 375 | $ 400 | $ 10
Whitehorn Pipeline Company LLC [Member] |  |  |  |
Noncontrolling Interest |  |  |  |
Percentage of Equity Interests Acquired |  | 20.00% |  |
Enterprise EF78 LLC [Member] |  |  |  |
Noncontrolling Interest |  |  |  |
Percentage of Equity Interests Acquired |  | 25.00% |  |
Panola Pipeline Company, LLC [Member] |  |  |  |
Noncontrolling Interest |  |  |  |
Percentage of Equity Interests Acquired | 15.00% |  |  |
Payments To Acquire Additional Interest In Subsidiaries As An Equity Transaction | $ 25 |  |  |
Parent Company's Ownership Percentage of Subsidiary | 70.00% |  |  |

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