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v3.25.4

Benefit Plans - Pension Plan Assets (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Pension plans' assets |  |  |
Expected weighted average long-term rate of return on primary employee plan assets for the next fiscal year | 10 years |  |
Expected weighted average long-term rate of return on employee-agent plan assets for the next fiscal year | 5 years |  |
Pension benefits |  |  |
Pension plans' assets |  |  |
Notional amount of derivatives, maximum percentage of plan assets (as a percent) | 130.00% |  |
Expected weighted average long-term rate of return on plan assets | 7.58% | 7.34% | 7.35%
Expected weighted average long-term rate of return on plan assets for the next fiscal year | 7.81% |  |
Arithmetic average of the annual actual return on plan assets for the last 10 years | 9.00% |  |
Arithmetic average of the annual actual return on plan assets for the last 5 years | 3.70% |  |

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- Definition Represents the long-term rate of return on plan assets for the next fiscal year, reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation, used as an assumption for calculating the net periodic benefit cost. + References No definition available. + Details
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- Definition Represents the long-term rate of return on plan assets for the next fiscal year for the employee-agent plan, reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation, used as an assumption for calculating the net periodic benefit cost. + References No definition available. + Details
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- Definition Represents the long-term rate of return on plan assets for the next fiscal year for the primary employee plan, reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation, used as an assumption for calculating the net periodic benefit cost. + References No definition available. + 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 5 -Subparagraph (j)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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 3: 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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