Financial Instruments (Net investment hedges in foreign operations) (Details) (Foreign Exchange Contract [Member], Net Investment Hedge [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Foreign Exchange Contract [Member] \| Net Investment Hedge [Member]
Net investment hedges in foreign operation
Gain (loss) recognized in AOCI		$ 5,741	$ 2,322
Gain (loss) reclassified from AOCI into earnings		88	(1,525)
Gain (loss) on hedged items	$ 0	$ (549)	$ (678)

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

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-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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- Definition

Amount of gain (loss) from the ineffectiveness of the hedge.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

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