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v3.25.3

Employee and Agent Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Pension benefits |  |  |  |
Components of Net Periodic Benefit Cost (Income) |  |  |  |
Service cost | $ 14.8 | $ 14.8 | $ 44.5 | $ 44.4
Interest cost | $ 43.4 | $ 40.3 | $ 130.2 | $ 121.1
Interest cost, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Expected return on plan assets | $ (43.0) | $ (42.6) | $ (129.0) | $ (127.8)
Expected return on plan assets, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Amortization of prior service benefit | $ (3.9) | $ (4.2) | $ (11.4) | $ (12.5)
Amortization of prior service (benefit) cost, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Recognized net actuarial (gain) loss | $ 8.7 | $ 9.8 | $ 26.1 | $ 29.2
Recognized net actuarial (gain) loss, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Net periodic benefit cost (income) | $ 20.0 | $ 18.1 | $ 60.4 | $ 54.4
Contributions made by employer to fund qualified and nonqualified pension plans | 25.6 |  | 58.6 |
Pension benefits | Maximum |  |  |  |
Components of Net Periodic Benefit Cost (Income) |  |  |  |
Amount of possible contributions to be made during the current fiscal year to the qualified and nonqualified pension plans combined | 70.0 |  | 70.0 |
Other postretirement benefits |  |  |  |
Components of Net Periodic Benefit Cost (Income) |  |  |  |
Interest cost | $ 0.8 | $ 0.8 | $ 2.3 | $ 2.3
Interest cost, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Expected return on plan assets | $ (1.2) | $ (1.0) | $ (3.5) | $ (3.3)
Expected return on plan assets, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Amortization of prior service benefit | $ (0.2) | $ (0.3) | $ (0.8) | $ (0.8)
Amortization of prior service (benefit) cost, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Recognized net actuarial (gain) loss | $ (0.4) | $ (0.3) | $ (1.1) | $ (0.8)
Recognized net actuarial (gain) loss, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Net periodic benefit cost (income) | $ (1.0) | $ (0.8) | $ (3.1) | $ (2.6)

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