The document outlines several major data breaches caused by hackers, detailing the financial losses and types of data stolen from prominent companies like Heartland, eBay, TJ Maxx, Home Depot, Sony PSN, and Adobe. Specific incidents include the 2008 Heartland breach costing $12.6 million and affecting 130 million records, and the 2014 Home Depot breach involving $43 million in expenses and 77 million records. Overall, the cost of these attacks extends beyond monetary losses to include reputational damage and legal repercussions.