Investment in Operating Leases, Net Invest in Operating Leases, Net (Future Nonresidual Rental Payments) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Future Lease Nonresidual Rental Payments [Abstract]
Operating Leases, Future Minimum Payments Receivable, Current	$ 1,319
Operating Leases, Future Minimum Payments Receivable, in Two Years	839
Operating Leases, Future Minimum Payments Receivable, in Three Years	364
Operating Leases, Future Minimum Payments Receivable, in Four Years	46
Operating Leases, Future Minimum Payments Receivable, Thereafter	4
Operating Leases, Future Minimum Payments Receivable	$ 2,572