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POSTRETIREMENT BENEFIT PLANS (Tables) | 6 Months Ended
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Jun. 30, 2020
Retirement Benefits [Abstract] |
Net Periodic Benefit Cost of Pension Plans and Other Employee Related Benefit Plans | The following table provides the components of net periodic benefit cost for pension plans and other employee-related benefit plans for the three and six months ended June 30, 2020 and 2019.
| 2020 |  |  |  |  |  |  |  |  |  |  |  | 2019 |  |  |  |  |  |  |  |  |  |
For the Three Months Ended June 30 | Pension |  |  |  | Other Benefits |  |  |  | Total |  |  |  | Pension |  |  |  | Other Benefits |  |  |  | Total |  |
Service cost |  | $ | 0.3 |  |  |  |  | $ | 0.2 |  |  |  |  | $ | 0.5 |  |  |  |  | $ | 0.3 |  |  |  |  | $ | 0.1 |  |  |  |  | $ | 0.4 |  |
Interest cost |  | 2.3 |  |  |  |  | 0.7 |  |  |  |  | 3.0 |  |  |  |  | 3.2 |  |  |  |  | 1.0 |  |  |  |  | 4.2 |  |
Expected return on plan assets |  | (2.1) |  |  |  |  | — |  |  |  |  | (2.1) |  |  |  |  | (3.4) |  |  |  |  | — |  |  |  |  | (3.4) |  |
Amortization of prior service (benefit) cost |  | — |  |  |  |  | (1.3) |  |  |  |  | (1.3) |  |  |  |  | 0.2 |  |  |  |  | (1.3) |  |  |  |  | (1.1) |  |
Amortization of net actuarial loss |  | 1.7 |  |  |  |  | 0.8 |  |  |  |  | 2.5 |  |  |  |  | 1.3 |  |  |  |  | 0.5 |  |  |  |  | 1.8 |  |
Total net periodic benefit cost |  | $ | 2.2 |  |  |  |  | $ | 0.4 |  |  |  |  | $ | 2.6 |  |  |  |  | $ | 1.6 |  |  |  |  | $ | 0.3 |  |  |  |  | $ | 1.9 |  |
| 2020 |  |  |  |  |  |  |  |  |  |  |  | 2019 |  |  |  |  |  |  |  |  |  |
For the Six Months Ended June 30 | Pension |  |  |  | Other Benefits |  |  |  | Total |  |  |  | Pension |  |  |  | Other Benefits |  |  |  | Total |  |
Service cost |  | $ | 0.6 |  |  |  |  | $ | 0.4 |  |  |  |  | $ | 1.0 |  |  |  |  | $ | 0.7 |  |  |  |  | $ | 0.3 |  |  |  |  | $ | 1.0 |  |
Interest cost |  | 4.6 |  |  |  |  | 1.4 |  |  |  |  | 6.0 |  |  |  |  | 6.3 |  |  |  |  | 2.0 |  |  |  |  | 8.3 |  |
Expected return on plan assets |  | (4.3) |  |  |  |  | — |  |  |  |  | (4.3) |  |  |  |  | (7.2) |  |  |  |  | — |  |  |  |  | (7.2) |  |
Amortization of prior service (benefit) cost |  | — |  |  |  |  | (2.5) |  |  |  |  | (2.5) |  |  |  |  | 0.4 |  |  |  |  | (2.6) |  |  |  |  | (2.2) |  |
Amortization of net actuarial loss |  | 3.5 |  |  |  |  | 1.4 |  |  |  |  | 4.9 |  |  |  |  | 2.6 |  |  |  |  | 1.1 |  |  |  |  | 3.7 |  |
Total net periodic benefit cost |  | $ | 4.4 |  |  |  |  | $ | 0.7 |  |  |  |  | $ | 5.1 |  |  |  |  | $ | 2.8 |  |  |  |  | $ | 0.8 |  |  |  |  | $ | 3.6 |  |

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- References No definition available. + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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