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Pensions and Other Postretirement Benefits - Benefit Assumptions (Details) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Return on assets in plans | 8.00% |  |
Funded Plan | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 5.56% | 2.97% | 2.67%
Future salary increases | 4.44% | 4.44% | 4.21%
Funded Plan | Other Postretirement Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 5.45% | 2.72% | 2.27%
Unfunded Plan | Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Future salary increases | 4.44% | 4.44% | 4.21%
Discount rate - service cost | 3.25% | 3.14% | 3.71%
Discount rate - interest cost | 2.45% | 1.95% | 2.92%
Return on assets in plans | 8.00% | 8.00% | 8.25%
Unfunded Plan | Other Postretirement Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate - service cost | 3.01% | 2.71% | 3.41%
Discount rate - interest cost | 2.13% | 1.57% | 2.69%
Return on assets in plans | 7.75% | 7.75% | 8.00%
Health care trend rate | 6.50% | 6.00% | 6.25%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920 + Details
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