BENGALURU (Reuters) - Indian telecom operator Vodafone Idea said on Friday it would raise 180 billion rupees ($2.16 billion) next week, in the country's largest follow-on public offering of new shares.

The public offering will open for bids on April 18 and close on April 22.

($1 = 83.3150 Indian rupees)

(Reporting by Rama Venkat in Bengaluru; Editing by Sonia Cheema)