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Employee Benefit Plans - Actual and Target Allocations of Plan Assets (Details) | Dec. 31, 2021 | Dec. 31, 2020
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Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Actual plan asset allocations | 100.00% | 100.00%
Target plan asset allocations | 100.00% |
Return-seeking investments |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Actual plan asset allocations | 29.00% | 22.00%
Target plan asset allocations | 30.00% |
Liability hedging investments |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Actual plan asset allocations | 69.00% | 77.00%
Target plan asset allocations | 70.00% |
Other |  |
Defined Benefit Plan, Plan Assets, Allocations [Abstract] |  |
Actual plan asset allocations | 2.00% | 1.00%
Target plan asset allocations | 0.00% |

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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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