The new 10-year notes will pay a coupon of 3.75% and will mature in June 2025.
Citigroup Global Markets, Deutsche Bank Securities, SG Americas Securities, HSBC Securities (US), Mitsubishi UFJ Securities (US), and RBC Capital Markets acted as joint bookrunners.
Yesterday Rio issued a notice of redemption for its 2.5% notes due in May 2016 and its 2.25% notes due in September 2016, of which $1.2 billion is outstanding.
The notes will be redeemed on July 11.
Rio shares last closed at $A57.48.