Fair Value Measurements (Commercial Aerospace Financing Commitments) (Details) (Commercial Aerospace [Member], USD $) In Billions, unless otherwise specified	Mar. 31, 2014
Commercial Aerospace [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	$ 11

The fair value of financial assets, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611

Name:	us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant