TextCell - Text and Detail are side-by-side, not stacked

All the samples show the text cell as being Text on top, with Detail underneath in smaller text (Subtitle style in iOS)

However, when I create a TextCell, the Detail is appearing to the right of the Text

        this.ItemTemplate = new DataTemplate (typeof(TextCell)) 
                { Bindings = {
                        { TextCell.TextProperty, new Binding("Description") }, 
                        { TextCell.DetailProperty, new Binding("VIN") } 
                    }
                };