The Assisted Conversions report informs you on all interaction, barring the last, which led to a conversion.Even here, you can choose the Dimension you want to view the slice of data for, the Conversion action and Look back window of your choice.
This report is pretty resourceful in terms of discovering segments of your advertising efforts that assisted in driving more conversions for your account. For instance, certain keywords can be found to be assisting conversions, rather than being the last click. This gives you good insight into what keywords you might consider increasing bids on, to further improve performance.