The 25-year-old will also reportedly earn 2m a season from the San Siro giants.
The report does confirm what Cesena sporting director Lorenzo Minotti suggested on Saturday afternoon.
"I think his transfer is just a formality," the former Parma player and Italian international told Radio Sportiva.
"A deal was pretty much already agreed in January, but then there were a few bureaucratic problems. The signatures are just missing now."