On 15 November 2013, Rio Tinto Finance plc and Rio Tinto Finance Limited entered into a US$7.5 billion multi-currency dual tranche revolving credit facility. The facility was amended and restated in November 2015 and again in November 2018. The $1.875 billion tranche matures in 2021 with an option to extend the maturity by one year to November 2022. The $5.625 billion tranche (which includes a US$ denominated same day access swing-line facility) matures in November 2022. The funds made available under the facilities may be used for the general corporate purposes of the Group.