I do not see a History class corresponding to Assign-Worklist or Assign-Workbasket

How can we get a list of worklist assignments that were previously worked? More specifically, I am looking for alist of all OTB Approval steps. We can have 10-20 approvals in each case and at any time the business should see the entire list of approvals with the approval result (approved/rejected/pending) along with notes/rejection notes.

Is there a history class that stores all approval assignments and the results of approval? All approvals assingment as a list?

Thanks