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Retirement Plans - Target and Weighted Average Actual Allocations and Benefit Pension Plans (Details) | Dec. 31, 2021 | Dec. 31, 2020
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Defined Benefit Plan Disclosure [Line Items] |  |
Actual allocation (as percent) | 100.00% | 100.00%
Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual allocation (as percent) | 28.00% | 63.00%
Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual allocation (as percent) | 17.00% | 28.00%
Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual allocation (as percent) | 55.00% | 9.00%
Defined Benefit Pension Plans | Minimum | Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (as a percent) | 25.00% |
Defined Benefit Pension Plans | Minimum | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (as a percent) | 10.00% |
Defined Benefit Pension Plans | Minimum | Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (as a percent) | 50.00% |
Defined Benefit Pension Plans | Maximum | Debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (as a percent) | 35.00% |
Defined Benefit Pension Plans | Maximum | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (as a percent) | 20.00% |
Defined Benefit Pension Plans | Maximum | Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (as a percent) | 60.00% |

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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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- 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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