UPDATE 1 — Australia's IDP rejects Blackstone's $494 million takeover offer
(Updates with details and share moves from paragraph 2) Sept 22 (Reuters) — Australia's IDP Education said on Tuesday it had rejected a roughly A$694.7 million ($493.79 million) takeover proposal from Blackstone, saying the approach substantially undervalued the company. Blackstone Singapore on September 9 offered A$2.