The company plans to use the net proceeds to fund its previously announced tender offer to purchase up to $2bn 11.5% first priority senior secured notes due 2023.
$135m of interest savings annually.
The new notes' 4% interest rate will replace existing debt carrying an 11.5% coupon and generate $135m of interest savings annually.
The notes are being offered only to institutional buyers outside the US, and the offering is expected to close on July 26.
PJT Partners is serving as independent financial advisor to Carnival.