Financing Receivables (Details 3) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivables on Non-accrual Status
Total Receivables	$ 251	$ 231
Lease receivables
Financing Receivables on Non-accrual Status
Total Receivables	91	53
Lease receivables | Major Markets
Financing Receivables on Non-accrual Status
Total Receivables	13	13
Lease receivables | Growth Markets
Financing Receivables on Non-accrual Status
Total Receivables	78	40
Loan receivables
Financing Receivables on Non-accrual Status
Total Receivables	160	178
Loan receivables | Major Markets
Financing Receivables on Non-accrual Status
Total Receivables	24	27
Loan receivables | Growth Markets
Financing Receivables on Non-accrual Status
Total Receivables	$ 137	$ 151