Remedies should prevent Google from eliminating "emerging competitive threats through acquisitions, minority investments, or partnerships," the DOJ said, adding that they should run for 10 years.
"The proposed remedies are designed to end Google's unlawful practices and open up the market for rivals and new entrants to emerge," the filing said.
Search advertising accounted for $49.4 billion in revenue in Alphabet's third quarter, representing three-quarters of total ad sales in the period.