After Fox Business headline: After Breakup, Kraft, Mondelez Embark on Separate Paths. My Sharkonomics opinion on that move:

Big corporations often practice cannibalism by competing with themselves. These types of solutions might work work fine on a white board but often not in the nature of real business life. The short time consequences can be losing brand strength and weakening corporate culture, which can attract competitors who can sense opportunities to bite into market shares.