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Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Category (Details) | Dec. 31, 2021 | Dec. 31, 2020
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Defined Benefit Plan Disclosure [Line Items] |  |
Actual | 100.00% | 100.00%
Target | 100.00% | 100.00%
Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual | 2.50% | 2.70%
Target | 3.00% | 3.00%
Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual | 56.40% | 53.00%
Target | 53.00% | 50.00%
Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual | 38.60% | 42.30%
Target | 42.00% | 45.00%
Alternative investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual | 2.50% | 2.00%
Target | 2.00% | 2.00%

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- Definition Percentage of target 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/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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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