A Trial Comparing the Efficacy and Safety of Insulin Degludec and Insulin Glargine 300 Units/mL in Subjects With Type 2 Diabetes Mellitus Inadequately Treated With Basal Insulin With or Without Oral Antidiabetic Drugs

This trial is conducted in Europe and North America. The aim of the trial is to compare the efficacy and safety of insulin degludec and insulin glargine 300 units/mL in subjects with type 2 diabetes mellitus inadequately treated with basal insulin with or without oral antidiabetic drugs. Due to change in glycaemic data collection process, this trial is amended to allow for a full 36 weeks (maintenance 2 period) of the use of the new process.