The division brought in $11.4 billion in net sales in 2021, accounting for 80% of its total sales.
Kellogg said its other two divisions – US, Canadian, and Caribbean cereal and plant-based businesses – collectively represented about 20% of its net sales in 2021.
The company said the names of the three companies would be determined later.
The Michigan-based company said snacks would be the biggest focus among the three.
It will be helmed by current Kellogg top boss Steve Cahillane and include brands such as Pringles, Cheez-It, and Pop-Tarts.
The global snacking business “is expected to be a higher-growth company than today’s Kellogg Company”, the group said in a statement.
North America will represent less than half of its net sales, with emerging markets bringing in around 30 per cent and developed international markets another 20 per cent.
The company’s North American cereal business accounted for about $2.4 billion of its net sales in 2021 and includes popular American breakfast cereal brands such as Kellogg’s, Frosted Flakes and Froot Loops.
“These businesses all have significant standalone potential, and an enhanced focus will enable them to better direct their resources toward their distinct strategic priorities,” CEO Cahillane said.