A Study to Test How a New Long-acting Insulin (Insulin Icodec) Works in the Body of People With Liver Disease

Participants will receive one insulin icodec dose, which will be administered in the morning of the day of dosing. The study will last for about 8 weeks. Participants will have 8 visits with the study doctor in the clinical research unit. Insulin icodec will be injected into a skin fold with a small needle (subcutaneous application) using a pen injector prefilled with a volume of 3 mL (about a spoonful). Participants must not participate if they meet certain conditions called exclusion criteria, such as an age of below 18 years or above 70 years, if participants are over- or underweight, using certain medicines, or have serious health conditions (other than impaired liver function ). Women cannot take part if pregnant, breast-feeding or planning to become pregnant during the study period.