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Employee Benefits - Weighted Average Assumptions Used In Determining Net Periodic Cost (Detail) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Pension |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate in effect for determining service cost | 5.40% | 5.30% | 3.80%
Discount rate in effect for determining interest cost | 5.20% | 5.10% | 3.20%
Expected return on plan assets | 7.90% | 7.70% | 6.70%
Rate of compensation increases | 3.00% | 3.00% | 3.00%
Health Care and Life |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate in effect for determining service cost | 5.10% | 5.30% | 3.20%
Discount rate in effect for determining interest cost | 4.90% | 5.10% | 2.30%
Expected return on plan assets | 6.30% | 7.30% | 4.90%

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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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- 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 -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate for Interest Cost + References No definition available. + Details
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- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate for Service Cost + References No definition available. + Details
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