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Employee Benefit Plans and Other Postretirement Benefits - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Benefit Plan Disclosure |  |  |  |
Retirement age threshold |  | 55 years |  |
Postretirement benefits eligibility, years of service requirement |  | 10 years |  |
Company contributions |  | $ 32.4 | $ 30.5 | $ 30.9
Pension and SERPA Benefits |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Expected return on plan assets |  | 6.20% | 6.80% | 5.60%
Accumulated benefit obligation |  | $ 1,510.0 | $ 1,570.0 |
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Investment in company common stock (in shares) |  | 1,273,592 | 1,273,592 |
Pension Benefits | Equity Holdings |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Target plan asset allocation |  | 30.00% |  |
Pension Benefits | Fixed Income Securities and Cash and Cash Equivalents |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Target plan asset allocation |  | 70.00% |  |
Pension Benefits | Defined Benefit Plan, Equity Securities, Common Stock |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Investment in company common stock - value |  | $ 38.4 | $ 46.9 |
Pension Benefits | Scenario, Forecast |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Expected return on plan assets | 6.40% |  |  |
Postretirement Healthcare Benefits |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Expected return on plan assets |  | 7.46% | 7.48% | 6.77%
Postretirement Healthcare Benefits | Equity Holdings |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Target plan asset allocation |  | 68.00% |  |
Postretirement Healthcare Benefits | Fixed Income Securities and Cash and Cash Equivalents |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Target plan asset allocation |  | 32.00% |  |
Postretirement Healthcare Benefits | Scenario, Forecast |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Expected return on plan assets | 7.70% |  |  |

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- Definition Defined Benefit Plan, Retirement Age Threshold + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of employer security in which defined benefit plan asset is invested. Includes, but is not limited to, security issued or managed by related party of employer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (n) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + 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 -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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