Derivative Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Derivative [Line Items]
Cash flow hedge gains to be reclassified during the next 12 months, pre-tax	$ 147
Fair value of foreign exchange and commodity contracts that have credit-risk-related contingent features that are in a net liability position	$ 37
Foreign Exchange Contract [Member] \| Maximum [Member]
Derivative [Line Items]
Derivative, Maturity Date	Dec. 31, 2019
Commodity Contract [Member] \| Maximum [Member]
Derivative [Line Items]
Derivative, Maturity Date	Dec. 31, 2017

The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4H

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624258-113959

Name:	us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant