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Employee Benefits - Net Periodic Benefit Costs Actuarial Assumptions (Details) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |
Ultimate health care cost trend rate | 4.50% |  |
Combined Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Rate of compensation increase | 3.25% | 3.25% | 3.25%
Expected long-term rate of return on plan assets | 5.50% | 5.50% | 6.50%
Combined Pension Plan | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 2.29% | 1.70% | 2.79%
Combined Pension Plan | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 3.12% | 2.88% | 3.55%
Post-Retirement Benefit Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected long-term rate of return on plan assets | 4.00% | 4.00% | 4.00%
Ultimate health care cost trend rate | 4.50% | 4.50% | 4.50%
Post-Retirement Benefit Plans | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 2.19% | 1.58% | 1.69%
Initial health care cost trend rate | 5.00% | 5.00% | 5.00%
Post-Retirement Benefit Plans | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 5.78% | 2.60% | 3.35%
Initial health care cost trend rate | 5.75% | 6.25% | 6.50%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, 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)(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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- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related 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)(2) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Ultimate trend rate for health care cost for defined benefit postretirement 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 (l) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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