This study will be an open-label (all volunteers and study staff know the identity of the assigned treatment), single-center, fixed-sequence study (all volunteers receive the same medication on the same days), to determine how canagliflozin (a drug currently being investigated for the treatment of type 2 diabetes mellitus) affects the pharmacokinetics (ie, how the body affects the drug) of an oral contraceptive containing ethinyl estradiol and levonorgestrel. The study will consist of 3 phases; a screening phase, an open-label treatment phase, and an end-of-study (or follow-up) phase. Each volunteer will participate in the study for approximately 33 days.