Microsoft agreed to do its best, including defending against lawsuits, to comply with antitrust laws.

Yahoo can decide to use Microsoft's mapping and mobile search services.

Microsoft agreed to hire at least 400 Yahoo workers. Yahoo can use the $50 million payments to help cover transition and implementation costs, it said.

The new details emerged after Microsoft CEO Steve Ballmer last week tried to justify the deal to a group of analysts, after noting that Yahoo's stock plummeted after the agreement was announced. Even though Yahoo didn't get a large upfront cash payout, which analysts apparently had hoped for, it will generate about $500 million in operating income and a savings of about $200 million in capital expenditures once it closes, he said.