Shareowners' Equity (Other) (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2016	Oct. 26, 2016	Dec. 31, 2015
Accelerated Share Repurchases [Line Items]
Accelerated share repurchases initial price paid	$ 2,500
Accelerated share repurchases initial delivery of shares	71,189,280
Accelerated share repurchases settlement payment or receipt	$ 9,125
Treasury stock value	79,849		$ 63,539
Unsettled contract determined to be forward contract indexed to issuers equity	$ 375
Remaining shares related to ASR received	18,269,775	14,758,566
Repurchase Agreements [Member]
Accelerated Share Repurchases [Line Items]
Treasury stock value	$ 2,125

The initial number of shares on the date of executing the accelerated share repurchase agreement.

No definition available.

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- Definition

Initial price paid to purchase the targeted number of shares through the ASR agreement

+ References

No definition available.

+ Details

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- Definition

The unsettled contract of the ASR that is determined to be a forward contract indexed to issuers equity

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653

+ Details

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- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

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