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Commitments and Contingencies - Insurance (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 29 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Dec. 31, 2024
Loss Contingencies [Line Items] |  |  |  |  |  |
Percentage of potential losses covered by insurance on legal liabilities for bodily injury and property damage to third parties | 83.00% |  | 83.00% |  | 83.00% |
Policy insurance coverage for bodily injury and property damage to third parties, minimum | $ 75,000,000 |  | $ 75,000,000 |  | $ 75,000,000 |
Self-insured for bodily injury and property damage to third parties coverage amount, maximum | 734,000,000 |  | 734,000,000 |  | 734,000,000 |
Self insured for bodily injury and property damage to third parties, pollution releases above | 800,000,000 |  | 800,000,000 |  | 800,000,000 |
Self insured for bodily injury and property damage to third parties, pollution releases , additional liability | $ 43,000,000 |  | $ 43,000,000 |  | $ 43,000,000 |
Percentage of potential losses covered by insurance on damage to property owned or in control | 77.00% |  | 77.00% |  | 77.00% |
Policy insurance coverage for potential losses on damage to property owned or in control, minimum | $ 75,000,000 |  | $ 75,000,000 |  | $ 75,000,000 |
Policy insurance coverage for potential losses on damage to property owned or in control, maximum | 275,000,000 |  | 275,000,000 |  | 275,000,000 |
Eastern Ohio Incident |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Insurance recoveries | 74,000,000 | $ 156,000,000 | 298,000,000 | $ 264,000,000 | 1,000,000,000.0 |
Insurance recoveries receivable | $ 49,000,000 |  | $ 49,000,000 |  | $ 49,000,000 | $ 18,000,000

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