Standard reports in E-Business Suite do not provide for an income statement or balance sheet. This is facilitated by the Financial Statement Generator (FSG). FSG functionality normally generates output in text format, but with the introduction of BI (XML) Publisher you have the capability to generate these reports in PDF, Excel, and HTML.
Financial Statement Generator (FSG) enables a column and a row combination to generate a report. Primarily the rows show all the data elements and the column can be used for identifying the period for which you are reporting.
One important thing to note is that FSG can only report on GL balances, so the rows will—in most cases—contain a GL Account string (your Account Flexfield segments) and the columns contain a period identifier. This would give you a monthly column for say the balance in your cash account.