All three businesses have significant stand-alone potential, CEO Steve Cahillane said.
Employees voted to ratify a new contract to end a work stoppage that began in early October.
The new offer includes cost-of-living adjustments and a $1.10 per hour raise for all employees.
U.S. law allows employers to permanently replace strikers in many cases. But the facts of the strike and the politics of the day could make it harder for Kellogg's.
The president called the move by Kellogg's "an existential attack on the union and its members."
The work stoppage at the storied cereal maker has stretched beyond two months.
Kellogg's said in its lawsuit that union members have been physically blocking the entrance to the plant as trucks try to enter.
Workers say the cereal giant is pursuing a long-term plan to eliminate the good pay and solid benefits they've won in past contracts.
Kids with visual impairments can get loving messages with their snacks through Braille stickers and audio boxes.