The Centre on Monday launched a $2 billion infrastructure debt fund (IDF) to catalyse long-term lending to core sectors. The fund, which will be set up jointly by private sector lender ICICI Bank, Bank of Baroda, Citibank and Life Insurance Corporation of India (LIC), has been mandated to invest in infrastructure projects, under the public-private-partnership (PPP) model that have completed at least one year of operations.