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Multiemployer Pension Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Multiemployer Plans [Abstract] |
Multiemployer Pension Plan Description and Contributions | Our participation in multiemployer pension plans for the year ended December 31, 2018 is outlined in the table below:
Pension Fund |  | Employer Identification Number |  | Pension Protection Act Zone Status 1 |  | FIP/RP Status Pending/Implemented in 2018 2 |  | Contributions of the Company |  | Surcharge Imposed in 2018 |  | Expiration Date of Collective-Bargaining Agreements
|  |  |  | 2018 |  | 2017 |  | 2016 |  |
|  |  |  | 2018 |  | 2017 |  |  |  | (in millions of dollars) |  |  |  |  |  |
Steelworkers Pension Trust (USW)3 |  | 236648508 |  | Green |  | Green |  | No |  | $ | 3.6 |  |  | $ | 3.5 |  |  | $ | 3.7 |  |  | No |  | Mar 2020 | - | Feb 2021
Other Funds 4 |  |  |  |  |  |  |  |  |  | 1.1 |  |  | 1.1 |  |  | 1.0 |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  | $ | 4.7 |  |  | $ | 4.6 |  |  | $ | 4.7 |  |  |  |  |  |  |
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1. | The most recent Pension Protection Act zone status available in 2018 and 2017 for the Steelworkers Pension Trust is for the plan's year-end at December 31, 2017 and December 31, 2016, respectively. The zone status is based on information that we received from the plan and is certified by the plan's actuary. Among other factors, plans in the green zone are at least 80% funded.
2. | The "FIP/RP Status Pending/Implemented" column indicates if a Financial Improvement Plan (FIP) or a Rehabilitation Plan (RP) is either pending or has been implemented for the plan under the Pension Protection Act.
3. | We are party to three collective bargaining agreements with the United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union, AFL-CIO, CLC ("USW") that require contributions to the Steelworkers Pension Trust. As of December 31, 2018, USW collective bargaining agreements covering employees at the Newark, Ohio ("Newark") and Spokane, Washington ("Trentwood") facilities covered 86% of our USW-represented employees and expire in September 2020. Our monthly contributions per hour worked by each bargaining unit employee at the Newark and Trentwood facilities are (in whole dollars) $1.50 and will increase to $1.75 in 2019. The union contracts covering employees at the Richmond, Virginia facility and Florence, Alabama facility cover 11% and 3% of our USW-represented employees, respectively, and expire in November 2020 and March 2020, respectively.
4. Other Funds consists of plans that are not individually significant.

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