The warewashing detergent composition includes a cleaning agent, an alkaline source, and a corrosion inhibitor. The cleaning agent compises a detersive amount of a surfactant. The alkaline source is provided in an amount effective to provide a use composition having a pH of at least about 8. The corrosion inhibitor includes a source of aluminum ion and a source of zinc ion. The relative amounts of the source of zinc ion and the source of alunminum ion can be controlled to reduce visible filming when the warewashing detergent composition is used in the presence of hard water. Methods for usingand manufacturing a warewashing detergent composition are provided.