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v3.25.3

Employee and Agent Benefits (Tables) | 9 Months Ended
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Sep. 30, 2025
Employee and Agent Benefits |
Components of Net Periodic Benefit Cost (Income) (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Other postretirement
​ | ​ | Pension benefits | ​ | benefits
​ | ​ | For the three months ended | ​ | For the three months ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024
​ | ​ | (in millions)
Service cost | ​ | $ | 14.8 | ​ | $ | 14.8 | ​ | $ | — | ​ | $ | —
Interest cost | ​ | ​ | 43.4 | ​ |  | 40.3 | ​ |  | 0.8 | ​ |  | 0.8
Expected return on plan assets | ​ | ​ | (43.0) | ​ |  | (42.6) | ​ |  | (1.2) | ​ |  | (1.0)
Amortization of prior service benefit | ​ | ​ | (3.9) | ​ |  | (4.2) | ​ |  | (0.2) | ​ |  | (0.3)
Recognized net actuarial (gain) loss | ​ | ​ | 8.7 | ​ |  | 9.8 | ​ |  | (0.4) | ​ |  | (0.3)
Net periodic benefit cost (income) | ​ | $ | 20.0 | ​ | $ | 18.1 | ​ | $ | (1.0) | ​ | $ | (0.8)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Other postretirement
​ | ​ | Pension benefits | ​ | benefits
​ | ​ | For the nine months ended | ​ | For the nine months ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024
​ | ​ | (in millions)
Service cost | ​ | $ | 44.5 | ​ | $ | 44.4 | ​ | $ | — | ​ | $ | —
Interest cost | ​ |  | 130.2 | ​ |  | 121.1 | ​ |  | 2.3 | ​ |  | 2.3
Expected return on plan assets | ​ |  | (129.0) | ​ |  | (127.8) | ​ |  | (3.5) | ​ |  | (3.3)
Amortization of prior service benefit | ​ |  | (11.4) | ​ |  | (12.5) | ​ |  | (0.8) | ​ |  | (0.8)
Recognized net actuarial (gain) loss | ​ |  | 26.1 | ​ |  | 29.2 | ​ |  | (1.1) | ​ |  | (0.8)
Net periodic benefit cost (income) | ​ | $ | 60.4 | ​ | $ | 54.4 | ​ | $ | (3.1) | ​ | $ | (2.6)
​

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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