Finance Assets, net (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance assets, net	$ 1,028,000,000	$ 1,239,000,000
Investments in finance leases	1,060,000,000	1,281,000,000
Allowance for credit losses	32,000,000	42,000,000	$ 42,000,000	$ 52,000,000
Third-party nonrecourse debt	800,000,000	1,200,000,000
Leases with contingent rentals	0	0
Decrease to estimated residual values	28,000,000	65,000,000	63,000,000
PMCC leveraged lease revenues	48,000,000	46,000,000	80,000,000
Income tax expense on leveraged lease revenues	16,000,000	17,000,000	30,000,000
Decrease to allowance	$ 10,000,000	0	10,000,000
Aircraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in finance leases, percentage	43.00%
Electric Power [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in finance leases, percentage	28.00%
Railcar [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in finance leases, percentage	12.00%
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in finance leases, percentage	9.00%
Manufacturing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in finance leases, percentage	8.00%
Decrease in Unguaranteed Residual Value Resulting in Reduction to Net Revenues [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reduction in net revenues	$ 18,000,000	41,000,000	$ 26,000,000
Finance Leases Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in finance leases	1,060,000,000	1,281,000,000
Outside of U.S. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in finance leases	$ 0	$ 0