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v3.22.2.2

EMPLOYEE BENEFITS-COSTS AND CONTRIBUTIONS (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Components of net periodic benefit cost (credit) |  |  |  |
Contributions and payments related to pension and OPEB plans |  |  | $ 11.6 | $ 11.3
Pension Benefits |  |  |  |
Components of net periodic benefit cost (credit) |  |  |  |
Service cost | $ 12.3 | $ 13.3 | 38.9 | 40.8
Interest cost | 23.2 | 22.2 | 68.4 | 65.8
Expected return on plan assets | (51.6) | (50.1) | (156.8) | (150.8)
Loss on plan settlement | 1.1 | 0.9 | 3.3 | 2.9
Amortization of prior service (credit) cost | 0.4 | 0.4 | 1.2 | 1.2
Amortization of net actuarial (gain) loss | 19.0 | 26.4 | 57.2 | 82.0
Net periodic benefit (credit) cost | 4.4 | 13.1 | 12.2 | 41.9
Contributions and payments related to pension and OPEB plans |  |  | 8.4 |
Estimated future employer contributions for the remainder of the year | 2.8 |  | 2.8 |
Other Postretirement Benefits |  |  |  |
Components of net periodic benefit cost (credit) |  |  |  |
Service cost | 3.6 | 4.0 | 10.7 | 11.8
Interest cost | 3.8 | 3.7 | 11.5 | 10.9
Expected return on plan assets | (17.2) | (16.5) | (51.7) | (49.5)
Amortization of prior service (credit) cost | (4.0) | (4.1) | (11.9) | (12.0)
Amortization of net actuarial (gain) loss | (6.2) | (5.9) | (18.5) | (18.1)
Net periodic benefit (credit) cost | $ (20.0) | $ (18.8) | (59.9) | $ (56.9)
Contributions and payments related to pension and OPEB plans |  |  | $ 3.2 |

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