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Pension benefits are funded through deposits with trustees that satisfy , at a minimum, the applicable funding regulations. OPEB benefits are funded as they become due. Projected contributions to be made during 2015 to the defined benefit pension plans are $13 for our non-U.S. plans. Based on the current funded status of our U.S. plans, there are no minimum contributions required for 2015. 

Multiemployer pension plans  — We participate in the Steelworkers Pension Trust (SPT) multiemployer pension plan which provides pension benefits to substantially all of our U.S. union-represented employees.We also have a small participation in the IAM National Pension Fund. Benefit levels are set by trustees who manage the plans. Contributions are made in accordance with our collective bargaining agreements and rates are generally based on hours worked.The collective bargaining agreement expires May 31, 2017. The trustees of the SPT have provided us with the latest data available for the plan year ended December 31, 2014. As of that date, the plan is not fully funded.We could be held liable to the plan for our obligations as well as those of other employers as a result of our participation in the plan. Contribution rates could increase if the plan is required to adopt a funding improvement plan or a rehabilitation plan, if the performance of plan assets does not meet expectations or as a result of future collectively bar gained wage and benefit agreements. If we choose to stop participating in the plan, we may be required to pay the plan an amount based on the underfunded status of the plan, referred to as a withdrawal liability. 

The Pension Protection Act (PPA) defines a zone status for each plan. Plans in the green zone are at least 80% funded, plans in the yellow zone are at least 65% funded and plans in the red zone are generally less than 65% funded. The SPT plan has utilized extended amortization provisions to amortize its losses from 2008.The plan recertified its zone status after using the extended amortization provisions as allowed by law . The SPT plan has not implemented a funding improvement or rehabilitation plan, nor are such plans pending. Our contributions to the SPT  have not exceeded 5% of the total contributions to the plan. Contributions in 2014 increased by approximately 5% after decreasing in 2013 as a result of plant closings and decreased employment levels. 

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## Note 12. Marketable Securities 

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U.S. government securities include bonds issued by government-sponsored agencies and Treasury notes. Corporate securities include primarily debt securities. Other consists of investments in mutual and index funds. U.S. government securities, corporate debt and certificates of deposit maturing in one year or less, after one year through five years and after five years through ten years total $32, $64 and $1 at December 31, 2014. 

