Work Item History shows all work items that have been completed and are no longer active. You can search by User, Record, Assigned Date and Due Date.

The resulting report shows Start Due, Completed Date, Completed By, Step Name and Record information for each current work item. You can view the Record associated with the work item by clicking on item in the report.

You can also run Work Item Path report to show the complete history of this work item as it relates to other items in the workflow path to which it each item related.

Also note that any items that were completed while overdue will be shown in RED as is shown in this example.