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Contingencies and Commitments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) Bargeslip Spill Company
Loss Contingencies [Line Items]
Issued guaranties	$ 32.3
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
Maximum [Member]
Loss Contingencies [Line Items]
Guarantor obligations, expiration period	2 years
Performance Bonds [Member]
Loss Contingencies [Line Items]
Issued guaranties	$ 20.6
Letters of Credit [Member]
Loss Contingencies [Line Items]
Issued guaranties	$ 11.6

X

- Definition

Refers to number of barge slips during the period.

+ References

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- Definition

Number of companies also named as potentially responsible parties under comprehensive environmental response compensation and liability act.

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- Definition

Number of spills at the site to be declared as a Superfund site.

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Term of the guarantee or each group of financial instruments used to support performance by the company and its subsidiaries in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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