There's a $30 billion reason the Google antitrust ruling will have the search giant very worried right now

Mateusz Wlodarczyk/NurPhoto via Getty Images; Chelsea Jia Feng

• Google projected it could lose $30 billion if it lost its default spot on Apple devices.
• A federal judge ruled that Google's agreements with Apple and others "have anticompetitive effects."
• A breakup with Apple is just one potential remedy. Google said it plans to appeal.

Google's agreements with Apple and other companies to be their default search engine have violated antitrust law, a federal judge ruled on Monday.