XML 27 R14.htm IDEA: XBRL DOCUMENT
v3.20.4

Multiemployer Pension Plans | 12 Months Ended
--- | ---
Dec. 31, 2020
Compensation And Retirement Disclosure [Abstract] |
Multiemployer Pension Plans | 6. Multiemployer Pension Plans Overview. We contribute to multiemployer defined benefit pension plans under the terms of collective bargaining agreements that cover our union-represented employees at certain facilities. At December 31, 2020, approximately 50% of our total employees were union-represented employees at facilities participating in these multiemployer pension plans. We currently estimate that contributions will range from $3.0 million to $5.0 million in 2021. The risks of participating in these multiemployer plans are different from single-employer plans in the following aspects:
| • | Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers.
| • | If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers.
| • | If we choose to stop participating in any of our multiemployer plans, we may be required to pay those plans an amount based on the underfunded status of the plan, referred to as a withdrawal liability.
The following table presents information about multiemployer pension plans in which we participate:
|  |  |  | Pension |  | FIP/RP Status |  | Contributions of |  |  |  |  |  |  |
|  | Employer |  | Protection Act |  | Pending/ |  | the Company |  |  | Surcharge |  | Expiration Date
|  | Identification |  | Zone Status1 |  | Implemented |  | Year Ended December 31, |  |  | Imposed |  | of Collective-
Pension Fund |  | Number |  | 2020 |  | 2019 |  | in 20202 |  | 2020 |  |  | 2019 |  |  | 2018 |  |  | in 2020 |  | Bargaining Agreements
|  |  |  |  |  |  |  |  |  | (in millions of dollars) |  |  |  |  |  |  |
Steelworkers Pension Trust (USW)3 |  | 23-6648508 |  | Green |  | Green |  | No |  | $ | 3.8 |  |  | $ | 3.8 |  |  | $ | 3.6 |  |  | No |  | Mar 2021 - Sep 2025
Other Funds4 |  |  |  |  |  |  |  |  |  |  | 1.1 |  |  |  | 1.2 |  |  |  | 1.1 |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  | $ | 4.9 |  |  | $ | 5.0 |  |  | $ | 4.7 |  |  |  |  |  |  |
1. | The most recent Pension Protection Act zone status available in 2020 and 2019 for the Steelworkers Pension Trust is for the plan’s year end at December 31, 2019 and December 31, 2018, 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, 2020, USW collective bargaining agreements covering employees at our Newark, Ohio (“Newark”) and Spokane, Washington (“Trentwood”) facilities covered 85% of our USW-represented employees and expire in September 2025. Our monthly contributions per hour worked by each bargaining unit employee at our Newark and Trentwood facilities were (in whole dollars) $1.75 in 2020. The union contracts covering employees at our Richmond, Virginia facility and Florence, Alabama facility cover 12% and 3% of our USW-represented employees, respectively, and expire in November 2021 and March 2021, respectively.
4. | Other Funds consists of plans that are not individually significant.
We were not listed in any of the plans’ Forms 5500 or the Canada-Wide Industrial Pension Plan financial statements as providing more than 5% of the total contributions for any of the plan years disclosed. At December 31, 2020, financial statements and Forms 5500 were not available for the plan years ending in 2020. Further, there were no significant changes to the number of employees covered by our multiemployer plans that would affect the period-to-period comparability of the contributions for the years presented.

X
- Definition Multiemployer Pension Plans Disclosure [Text Block] + References No definition available. + Details
Name: | kalu_MultiemployerPensionPlansDisclosureTextBlock
Namespace Prefix: | kalu_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration