Internal Requisition

We have a situation in which we require some help...

We have different department which uses utilities like phones, printing etc. We get one centralized bill which is paid by one department. Now we want to distribute the cost to different departments. What options do we have. Can it be setup at the Requisition / PO level and coded to different departments or we can do an internal requisition.The issue that we are anticipating in a req. is the approval from managers as there might be a dispute and it will hang indifently.We are looking for something that does not require any approval.