SAN FRANCISCO — Breaking up is hard to do, but large global healthcare companies have a way of making it look like a painless, albeit lengthy, process. Baxter (Deerfield, Illinois) announced its plans to split into two independent, public companies in March 2014 and that separation is expected to happen by the middle of this year. While many of the details won't be divulged until Baxter's shareholder meeting in May, CFO Robert Hombach offered a few clues during last week's J.P. Morgan Healthcare Conference about how the transaction is expected to shake out.