The world's top brewer Anheuser-Busch InBev said Thursday it had launched a major bond issue to help pay for the takeover of SABMiller. The targeted bond proceeds are $46 billion, making the issue one of the biggest in corporate history. The InBev bid for its closest rival is itself gigantic, valued at $121 billion, the third-largest takeover ever. The transaction will bring together InBev's top lagers like Beck's, Budweiser and Stella Artois, with SABMiller brands Foster's, Grolsch and Peroni. InBev is eager to tap into booming developing markets in Africa and China.