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Pensions - Schedule of Weighted Asset Allocation Percentages of Pension Plan Assets (Details) | Dec. 31, 2021 | Dec. 31, 2020
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Defined Benefit Plan Disclosure [Line Items] |  |
Weighted asset allocation percentage | 100.00% | 100.00%
Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Weighted asset allocation percentage | 2.40% | 4.00%
U.S. treasuries and agencies |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Weighted asset allocation percentage | 50.00% | 46.40%
Equity funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Weighted asset allocation percentage | 20.60% | 19.90%
Hedge funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Weighted asset allocation percentage | 27.00% | 29.70%

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- Definition 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. + References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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