Is it acceptable for university to ask for detailed financial report?
I'd say those details are a bit too detailed for comfort, especially for a graduate admission programme. However, the technical rationale behind could be that they might have some consideration for scholarships based on the financial details you provide. In the end, it is your decision. 

If you are still concerned about the necessity of those details, you may request the respective department of the University for a clarification of the reason behind them.