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EMPLOYEE BENEFITS | 3 Months Ended
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Mar. 31, 2020
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) |  | 2020 |  | 2019
Service cost |  | $ | 13.1 |  |  | $ | 11.3 |
Interest cost |  | 26.1 |  |  | 30.6 |
Expected return on plan assets |  | (47.9 | ) |  | (48.7 | )
Loss on plan settlement |  | 0.3 |  |  | 0.8 |
Amortization of prior service cost |  | 0.4 |  |  | 0.6 |
Amortization of net actuarial loss |  | 24.2 |  |  | 19.0 |
Net periodic benefit cost |  | $ | 16.2 |  |  | $ | 13.6 |
|  | OPEB Benefits
|  | Three Months Ended March 31
(in millions) |  | 2020 |  | 2019
Service cost |  | $ | 4.1 |  |  | $ | 4.4 |
Interest cost |  | 4.7 |  |  | 6.5 |
Expected return on plan assets |  | (15.1 | ) |  | (13.7 | )
Amortization of prior service credit |  | (3.7 | ) |  | (3.9 | )
Amortization of net actuarial gain |  | (5.4 | ) |  | (0.7 | )
Net periodic benefit credit |  | $ | (15.4 | ) |  | $ | (7.4 | )
During the three months ended March 31, 2020, we made contributions and payments of $3.5 million related to our pension plans and $0.2 million related to our OPEB plans. We expect to make contributions and payments of $8.0 million related to our pension plans and $0.8 million related to our OPEB plans during the remainder of 2020, dependent upon various factors affecting us, including our liquidity position and the continued effects of the Tax Legislation.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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