Leasing Activities (Net Investment In Leases By The Published Credit Ratings) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Rated Entities	$ 1,263	[1]	$ 1,258	[1]
Non Rated Entities	73	[1]	165	[1]
Total	1,336	[1]	1,423	[1]
AA/Aa And Above [Member]
Rated Entities	730	[1]	709	[1]
A [Member]
Rated Entities	$ 533	[1]	$ 549	[1]

[1] Excludes the credit ratings associated with collateral posted by the lessees in these transactions.