The alternative investment firm KKR & Co. Inc. announced Monday its plans to sell USI Insurance Services to Aon PLC, a professional services firm that offers risk mitigation solutions, in an all-cash, $17 billion transaction. USI’s sale price is approximately six times the size of KKR’s original equity investment in the insurance broker and 3.4 times KKR’s total investment in USI. For more stories like this, sign up for the PLANADVISERdash daily…