How does XBRL fulfill the need for real-time, accurate financial data?

Why is it useful to compare multiple companies at once?

Analyze liquidity, profitability, financing (leverage), and activity for your company. Where is it strong?

What impact (if any) does missing data have on the ratios?

If one company has a significantly higher debt-to-equity ratio than the other two, what might be driving this? How might the DuPont ratios help explain this?