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v3.25.2

Employee and Agent Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Pension benefits |  |  |  |
Components of Net Periodic Benefit Cost (Income) |  |  |  |
Service cost | $ 15.0 | $ 14.8 | $ 29.7 | $ 29.6
Interest cost | $ 43.7 | $ 40.5 | $ 86.8 | $ 80.8
Interest cost, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Expected return on plan assets | $ (43.1) | $ (42.6) | $ (86.0) | $ (85.2)
Expected return on plan assets, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Amortization of prior service benefit | $ (3.7) | $ (4.1) | $ (7.5) | $ (8.3)
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 | $ 9.1 | $ 9.8 | $ 17.4 | $ 19.4
Recognized net actuarial (gain) loss, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Net periodic benefit cost (income) | $ 21.0 | $ 18.4 | $ 40.4 | $ 36.3
Contributions made by employer to fund qualified and nonqualified pension plans | 33.0 |  | 33.0 |
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 | $ 0.7 | $ 0.7 | $ 1.5 | $ 1.5
Interest cost, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Expected return on plan assets | $ (1.2) | $ (1.2) | $ (2.3) | $ (2.3)
Expected return on plan assets, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Amortization of prior service benefit | $ (0.3) | $ (0.2) | $ (0.6) | $ (0.5)
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 | $ (0.3) | $ (0.2) | $ (0.7) | $ (0.5)
Recognized net actuarial (gain) loss, location on consolidated statements of operations | Operating expenses | Operating expenses | Operating expenses | Operating expenses
Net periodic benefit cost (income) | $ (1.1) | $ (0.9) | $ (2.1) | $ (1.8)

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