BRUSSELS -- The European Union's competition watchdog slapped a record $2.72 billion fine on internet giant Google Tuesday for breaching antitrust rules with its online shopping service.

European regulators said, "Google has abused its market dominance as a search engine by giving an illegal advantage to another Google product, its comparison shopping service."

It gave the Mountain View, California, company 90 days to stop or face fines of up to 5 percent of the average daily worldwide turnover of parent company Alphabet.

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The European Commission, which polices EU competition rules, alleges Google elevates its shopping service even when other options might have better deals.

The Commission said Google "gave prominent placement in its search results only to its own comparison shopping service, whilst demoting rival services. It stifled competition on the merits in comparison shopping markets."

Google maintains it's just trying to package its search results in a way that makes it easier for consumers to find what they want.

"When you shop online, you want to find the products you're looking for quickly and easily. And advertisers want to promote those same products. That's why Google shows shopping ads, connecting our users with thousands of advertisers, large and small, in ways that are useful for both," Kent Walker, senior vice president at Google, said in a statement.

"We respectfully disagree with the conclusions announced today," Google said.

"We will review the Commission's decision in detail as we consider an appeal, and we look forward to continuing to make our case," he said.

The fine is the highest ever imposed in Europe for anti-competitive behavior.

But the penalty is likely to leave a bigger dent in Google's pride and reputation than its finances: Alphabet has more than $92 billion in cash, including nearly $56 billion in accounts outside Europe.