When a project is implemented and in progress, the Project Implementation Budget object allows you to review the current budget information for the project. It is determined by; 

• Linking the action in planning side to accounts from your financial system through a financial integration.

• The project account mapping through a financial integration.

• Manually adding budget details.

The drill down option allows you to obtain a breakdown of figures for each of the elements as shown below:

Simply click on the arrow key against the row, in order to get a detail view.