Finance Assets, net (Schedule of Credit Quality of Investments in Finance Leases) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Gross investments in finance leases	$ 1,381	$ 1,656
Finance Leases Financing Receivable [Member] | Standard and Poors AAA to A minus [Member] | Moodys Aaa to A3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross investments in finance leases	261	417
Finance Leases Financing Receivable [Member] | Standard and Poors BBB plus to BBB minus [Member] | Moodys Baa1 to Baa3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross investments in finance leases	725	833
Finance Leases Financing Receivable [Member] | Standard and Poors BB Plus and Lower [Member] | Moodys Ba1 and Lower [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross investments in finance leases	$ 395	$ 406