Finance Assets, Net (Finance Assets, net (Schedule Of Leveraged And Direct Finance Rents Receivable)) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Capital Leased Assets [Line Items]
2013	$ 137
2014	181
2015	275
2016	99
2017	151
Thereafter	1,651
Total	2,494	4,088
Total	2,378	3,926
Rents receivable, net - Direct Finance Leases	116	162
Leveraged Leases [Member]
Capital Leased Assets [Line Items]
2013	92
2014	136
2015	275
2016	99
2017	151
Thereafter	1,625
Total	2,378
Direct Finance Leases [Member]
Capital Leased Assets [Line Items]
2013	45
2014	45
2015	0
2016	0
2017	0
Thereafter	26
Total	$ 116