...+ The parent company of Mylan Inc. has made an unsolicited, indicative proposal to acquire Ireland-based Perrigo Co. plc. + Perrigo has indicated its board will consider the proposal, which we estimate implies a close to $35 billion enterprise value for the company. + We are placing all of our ratings on Perrigo, including our '###' corporate credit rating, on CreditWatch with negative implications, primarily because Mylan is a lower-rated company than Perrigo and credit metrics for the combined entity could weaken to levels meaningfully below our current expectations for Perrigo. CHICAGO (Standard & Poor's) April 9, 2015--Standard & Poor's Ratings Services today placed all of its ratings on Dublin-based Perrigo Co. plc, including its '###' corporate credit rating, on CreditWatch with negative implications. We estimate debt outstanding at Perrigo at about $5.8 billion. We also separately placed all of our ratings on Mylan Inc., including our '###-' corporate credit rating, on CreditWatch...