1. Go to Reports > Budget Reports > Budget Distribution report.
2. Select the Scenario and year of the budget.
3. Select "Account Budgets with Project detail" in the Show drop down.
4. On the filters tab, select None for the Include drop down for projects. (This will narrow down results to only show budget data not associated with a project)
5. Preview.  The Total Account budget will appear first, next is the Undistributed amount marked with <No Project>, and then all projects following.