Group A: Healthy Subjects with Normal Renal Function (CLcr > 80 mL/min) Group B: Diabetic Subjects with Normal Renal Function (CLcr > 80 mL/min) Group C: Diabetic Subjects with Mild Renal Impairment (CLcr > 50 - ≤80 mL/min) Group D: Diabetic Subjects with Moderate Renal Impairment (CLcr ≥ 30 - ≤50 mL/min) Group E: Diabetic Subjects with Severe Renal Impairment (CLcr < 30 mL/min) (and not receiving dialysis)