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EMPLOYEE BENEFITS | 3 Months Ended
--- | ---
Mar. 31, 2022
Retirement Benefits [Abstract] |
EMPLOYEE BENEFITS | EMPLOYEE BENEFITS The following tables show the components of net periodic benefit cost (credit) for our benefit plans.
|  |  |  |  |  | Pension Benefits
|  |  |  | Three Months Ended March 31
(in millions) |  |  |  |  |  | 2022 |  | 2021
Service cost |  |  |  |  |  | $ | 12.4 |  |  | $ | 13.9 |
Interest cost |  |  |  |  |  | 22.8 |  |  | 21.9 |
Expected return on plan assets |  |  |  |  |  | (52.7) |  |  | (50.6) |
Loss on plan settlement |  |  |  |  |  | — |  |  | 0.1 |
Amortization of prior service cost |  |  |  |  |  | 0.4 |  |  | 0.4 |
Amortization of net actuarial loss |  |  |  |  |  | 19.1 |  |  | 27.4 |
Net periodic benefit cost |  |  |  |  |  | $ | 2.0 |  |  | $ | 13.1 |
|  |  |  |  |  | OPEB Benefits
|  |  |  | Three Months Ended March 31
(in millions) |  |  |  |  |  | 2022 |  | 2021
Service cost |  |  |  |  |  | $ | 3.8 |  |  | $ | 4.2 |
Interest cost |  |  |  |  |  | 3.9 |  |  | 3.6 |
Expected return on plan assets |  |  |  |  |  | (17.2) |  |  | (16.4) |
Amortization of prior service credit |  |  |  |  |  | (4.0) |  |  | (4.0) |
Amortization of net actuarial gain |  |  |  |  |  | (6.0) |  |  | (5.7) |
Net periodic benefit credit |  |  |  |  |  | $ | (19.5) |  |  | $ | (18.3) |
During the three months ended March 31, 2022, we made contributions and payments of $3.1 million related to our pension plans and $0.5 million related to our OPEB plans. We expect to make contributions and payments of $8.0 million related to our pension plans and $2.1 million related to our OPEB plans during the remainder of 2022, dependent upon various factors affecting us, including our liquidity position and possible tax law changes.

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