Mary Barra, Chairman and CEO of General Motors, and Mark Reuss, Executive Vice President of GM Global Product Development, reveal the Chevrolet Bolt EV to the news media at the 2016 North American International Auto Show January 11th, 2016 in Detroit, Michigan.

General Motors does not expect its electric vehicles to turn a profit for at least a few more years, CEO Mary Barra told investors Wednesday.

The largest U.S. automaker repeated its commitment Wednesday to make its entire vehicle lineup "all-electric," but provided investors with few details about those plans on a conference call after GM reported fourth-quarter earnings that beat expectations.

However, GM is clear that its electric vehicles won't make money until "early next decade," Barra said.

Turning a profit from electric vehicles has long been considered a major challenge for automakers, which are pouring money into electric vehicle, EV, technology in the face of fluctuating oil prices, government initiatives to reduce carbon pollution and excitement over Tesla.