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Contingencies and Commitments (Details) - Pending litigation $ in Millions, $ in Millions |  | 1 Months Ended |
--- | --- | --- | ---
Dec. 13, 2016 AUD ($) claim | Mar. 31, 2025 USD ($) | Mar. 31, 2025 AUD ($) | Nov. 30, 2024 USD ($) | Mar. 31, 2023 referee | Apr. 30, 2025 USD ($)
North Texas Tollway Authority |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Damages awarded |  |  | $ 280 | $ 280 |  |
Panel referred damages awarded from other party interest amount |  | $ 133 |  |  |  |
Panel referred damages awarded for legal expenses |  | $ 415 |  |  |  |
North Texas Tollway Authority | Subsequent Event |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss contingency receivable |  |  |  |  |  | $ 84
Santos Ltd |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Damages sought | $ 1,470 |  |  |  |  |
Number of referees appointed | referee |  |  |  |  | 3 |
Estimate of possible loss | $ 236 |  |  |  |  |
Santos Ltd Claim 1 |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of claims | claim | 1 |  |  |  |  |
Panel referred damages awarded from other party | $ 700 |  |  |  |  |
Santos Ltd Claim 2 |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Panel referred damages awarded from other party | $ 790 |  |  |  |  |

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