Constellium Rolled Products Ravenswood, LLC v. United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union, AFL-CIO/CLC

What Happened
Constellium Rolled Products, an aluminum manufacturing company, wanted to change healthcare benefits for retirees who were eligible for Medicare. The United Steelworkers union argued that the company couldn't make these changes without following the proper process outlined in their contract, which required going through arbitration (a dispute resolution process) first.

What the Court Decided
The court sided with the union and issued a preliminary injunction. This means the court ordered Constellium to stop making any changes to retiree healthcare benefits until the arbitration process is completed. The company must maintain the current benefits while the dispute is resolved through the agreed-upon arbitration process.

Why This Matters for Workers
This ruling reinforces that employers cannot unilaterally change important benefits like healthcare without following the procedures outlined in union contracts. For workers, especially those approaching retirement, this decision shows that courts will protect contractual agreements about benefits. It demonstrates that when unions negotiate specific procedures for handling disputes, employers must respect those processes rather than making changes on their own. This provides security for workers who depend on promised retirement benefits.