If Intel hadn’t sold to Apple, they would have had to pay out severance packages to 2200 engineers, plus break costs on whatever ongoing contracts existed (leases etc). So the comparison isn’t +$1B against $0, more like +$1B against -$1B (or at least a decent fraction of that), with the costs growing every day that the negotiations continued and the likelihood of a sale to anyone else continuing to drop (from a very low base).