In British English, a trillion used to mean a million million million (i.e. 1,000,000,000,000,000,000). Nowadays, it's generally held to be equivalent to a million million (1,000,000,000,000), as it is in American English. Thus in British English there were a million billions in a trillion. Now the convention has become a thousand billion just like in American English.
The AutoNews report states, the production move will end 500 manufacturing at the Mexican plant altogether, freeing the plant to product other cars for the North and South American markets. The Toluca plant also assembles the Dodge Journey, which is sold as Fiat Freemont in Europe.
Actually, Fiat S.p.A. owns the control share of Chrysler Group LLC. Jeep is actually a brand, rathere than a company. Chrysler group manages Chrysler (as a brand), Jeep, Dodge, SRT, Fiat USA and Abarth (for the activities in NA) etc. Since Chrysler is practically owned by Fiat S.p.A., this latter controls also Jeep. On the other hand Fiat S.p.A. owns Fiat Group Automobiles S.p.A. (FGA), that manages production and sales in Europe. So it manages Fiat (as a brand), Lancia, Alfa Romeo, Abarth.