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Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Actual Plan Asset Allocations of the PotlatchDeltic Retirement Plans' Assets Assets) (Details) - Pension Plans [Member] | Dec. 31, 2024 | Dec. 31, 2023
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Defined Benefit Plan, Actual Plan Asset Allocations | 100.00% | 100.00%
Global Equities [Member] |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 20.00% | 19.00%
Fixed Income Securities [Member] |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 74.00% | 74.00%
Other (Includes Cash and Cash Equivalents and Alternatives) [Member] |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 6.00% | 7.00%

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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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