Financing Receivables - Non-Accrual Status (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Total Lease Receivable and Loan Receivable Portfolio Segments
Financing Receivables on Non-accrual Status
Total Receivables	$ 200	$ 168
Lease receivables
Financing Receivables on Non-accrual Status
Total Receivables	43	65
Loan receivables
Financing Receivables on Non-accrual Status
Total Receivables	157	104
Major Markets | Lease receivables
Financing Receivables on Non-accrual Status
Total Receivables	2	2
Major Markets | Loan receivables
Financing Receivables on Non-accrual Status
Total Receivables	19	13
Growth Markets | Lease receivables
Financing Receivables on Non-accrual Status
Total Receivables	42	63
Growth Markets | Loan receivables
Financing Receivables on Non-accrual Status
Total Receivables	$ 139	$ 91