Alphabet’s Google will invest $6.78 billion in the U.K. over the next two years, the latest big-ticket commitment from an American tech giant seeking to expand artificial-intelligence infrastructure and other services in Europe.

Google’s parent, Alphabet, reached a $3 trillion market valuation for the first time on Monday, entrenching its place in the ranks of the world’s most valuable companies and signaling the central role of artificial intelligence (AI) in propelling Big Tech’s dominance. In Google’s case, some legal clarity around its monopoly status also helped.