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Contingencies and Commitments (Details) | 12 Months Ended
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Dec. 31, 2023 Bargeslip Company Spill
Portland Harbor Superfund Site [Member] |
Loss Contingencies [Line Items] |
Number of other companies also named as Potentially Responsible Parties ("PRPs") | Company | 250
Number of spills | Spill | 4
SBA Shipyard Site [Member] |
Loss Contingencies [Line Items] |
Number of barge slips | Bargeslip | 3

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