SAN FRANCISCO (AP) — Twenty years after Larry Page and Sergey Brin set out to organize all of the internet's information, the search engine they named Google has morphed into a dominating force in smartphones, online video, email, maps and much more.

That resounding success now has regulators and lawmakers around the world questioning whether the company has become too powerful as its ubiquitous services vacuum up sensitive information about billions of people hooked on its products.

Google's search engine remains entrenched as the internet's main gateway, and its digital advertising business...