Leasing Activities (Net Investment In Leases By The Published Credit Ratings) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Rated Entities	$ 1,161	$ 1,258
Non Rated Entities	168	165
Total	1,329	1,423
AA/Aa And Above [Member]
Rated Entities	723	709
A [Member]
Rated Entities	$ 438	$ 549

The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 17
-Subparagraph c

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 61

Name:	us-gaap_AssetsHeldInTrust
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant