General Motors is working on an assortment of electric vehicles, but CEO Mary Barra believes it will be decades before all vehicles are electric.

Speaking to Bloomberg, Barra said the transition to electric vehicles will “happen over time” and it will take decades before every vehicle is electric.

While Barra wouldn’t say when she expects all vehicles to be electric, she did suggest 2040 was too soon. As she explained, “It will happen in a little bit longer period, but it will happen.”

There was little doubt the switch to electric vehicles would take a long time, but automakers such as General Motors are increasingly turning their attention to EVs. Back in March, the company hosted an EV day event where they announced the Cadillac Lyriq and teased a handful of upcoming models including what appears to be a compact crossover, a coupe, a crossover coupe and an electric delivery van.

Also Read: GM Shows Off New EV Platform, Teases Cadillac Lyriq And Confirms Chevy Bolt EUV

The company also used the event to announce plans for a range-topping Cadillac Celestiq as well as a “new version” of the Chevrolet Bolt. The latter model was originally slated to be launched late this year, but the coronavirus pandemic has pushed the debut back to 2021 when it be launched as a 2022 model. The company also announced the 2022 Bolt EUV which will arrive next summer.

Besides talking about electric vehicles, Barra said we will “clearly” see fully autonomous vehicles within the next five years. Of course, that isn’t too surprising as the Cruise Origin was unveiled earlier this year as a fully autonomous electric shuttle.

GM has previously said the Cruise Origin will be built at the Detroit-Hamtramck assembly plant and go into production “soon after” the GMC Hummer EV is launched in late 2021.