def name_get(self, cr, uid, ids, context=None):
    if context is None:
        context = {}
if isinstance(ids, int):
    ids = [ids]
res = []
if context.get('special_display_name', False):
    for record in self.browse(cr, uid, ids, context=context):
        name = record.name
percentage = record.insurance_percentage
res.append(record.id, name + ' - ' + percentage + '%')
odoo - отображаемое имя комбинации полей many2one из 2 полей