Tata Capital Ltd. has confidentially filed draft papers for its IPO, with an expected worth of up to $2 billion.The IPO is expected to comprise a fresh issue of 23 crore equity shares and an offer-for-sale by certain existing shareholders.Tata Capital had long been preparing for a public listing and had received approval for a merger with Tata Motors Finance.Tata Capital becomes the latest company to utilize the pre-filed confidential route for its IPO filing.